SMD code search: identify a part by its marking

Not sure which one you have?

Answer up to 4 quick questions and these 23 parts are ranked, with a meter test that settles it. It works on a dead part too.

The only part printed ADDC in our tables

TC1301ADDCVMF

What it is: Not recorded
Maker: Microchip
Package: DFN
Pins: Not recorded
Details: Linear voltage regulator with volatge detector: LDO, Dual out, Vo1/Vo2=3.0V(300mA)/3.0V(150mA)±2.5%, Vdet=2.32V±2.5%, +…
Source: Published code list

Is it dead?

Voltage, board powered, black probe on ground. Then ohms with the power off.

Working, it reads

Input pin at the supply, output pin at its rated voltage, and the enable pin high if it has one.

Dead, it reads

Output equal to the input: the pass element has shorted. Everything after it may have taken the full input.
Input present, enable high, no output: failed open, or holding itself off into a shorted load. Power off and measure output to ground.
Power off, input to output near 0 Ω: shorted.

On the board:: An output at 0 V is often a shorted load with the regulator in current limit. Lift the output pin: if the short stays on the board, the regulator may be fine.
Compare:: The same regulator on another rail or another board shows the right voltages and the right resistances.
Watch for:: Makers put input, output and ground on different pins in the same package, so take them from this part's datasheet. Diode or ohms readings between its pins say little; check it powered.

A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.

Was it this one?

Printed with a code easy to misread

These parts are printed with a character that is easy to misread as what you typed. The odd one out is marked on each.

SN74AHC1G00DBVprinted A00GSOT-23-5Logic gate, 5 pins, Texas InstrumentsLogic gateSOT-23-55 pinsTexas Instruments
Printed A00G on the part. Easy to misread as ADDC. Check that character with a loupe before you order anything.
What it is
Logic gate
Maker
Texas Instruments
Package
SOT-23-5
Pins
5
Details
Single 2-Input Positive-NAND Gate
Source
Manufacturer datasheet
Is it dead?
Voltage with the board powered; ohms from each pin to ground with it off.
Working, it reads
Supply pin at its voltage and the output doing what the datasheet says. Readings between pins depend on the part.
Dead, it reads
A pin near 0 Ω to ground or to the supply pin where an identical part does not read that: failed short.
Supply present, output stuck: failed, or its load has.
On the board:
A pin shorted to ground on the board can be anything on that net. Lift the pin to be sure.
Compare:
The surest reference is the same IC on a working board, measured pin by pin.
Watch for:
Its protection diodes can read like junctions between pins, even like a transistor. That proves nothing either way.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
Datasheetfor SN74AHC1G00DBV, opens in a new tab
MAX1872UK29printed ADQGSOT-23-55 pins, Analog DevicesNot recordedSOT-23-55 pinsAnalog Devices
Printed ADQG on the part. Easy to misread as ADDC. Check that character with a loupe before you order anything.
What it is
Not recorded
Maker
Analog Devices
Package
SOT-23-5
Pins
5
Source
Published code list
Is it dead?
Diode range and ohms range, part lifted.
Working, it reads
Depends on what it is. The datasheet, or an identical part, says.
Dead, it reads
Between two pins, the same reading both ways, near 0 V with a continuous beep: shorted.
Open between every pair of pins: failed open, or a part that reads open when working.
On the board
this is a first look only: the meter reads every path between those pins, and a short can be a neighbour. Lift one leg before you condemn it.
Compare:
If an identical part sits elsewhere on the board, measure it the same way: that is what this one should read.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
MAX4376TUKprinted ADOGSOT-23-55 pins, Analog DevicesNot recordedSOT-23-55 pinsAnalog Devices
Printed ADOG on the part. Easy to misread as ADDC. Check that character with a loupe before you order anything.
What it is
Not recorded
Maker
Analog Devices
Package
SOT-23-5
Pins
5
Source
Published code list
Is it dead?
Diode range and ohms range, part lifted.
Working, it reads
Depends on what it is. The datasheet, or an identical part, says.
Dead, it reads
Between two pins, the same reading both ways, near 0 V with a continuous beep: shorted.
Open between every pair of pins: failed open, or a part that reads open when working.
On the board
this is a first look only: the meter reads every path between those pins, and a short can be a neighbour. Lift one leg before you condemn it.
Compare:
If an identical part sits elsewhere on the board, measure it the same way: that is what this one should read.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
MAX4646UKprinted ADOCSOT-23-55 pins, Analog DevicesNot recordedSOT-23-55 pinsAnalog Devices
Printed ADOC on the part. Easy to misread as ADDC. Check that character with a loupe before you order anything.
What it is
Not recorded
Maker
Analog Devices
Package
SOT-23-5
Pins
5
Source
Published code list
Is it dead?
Diode range and ohms range, part lifted.
Working, it reads
Depends on what it is. The datasheet, or an identical part, says.
Dead, it reads
Between two pins, the same reading both ways, near 0 V with a continuous beep: shorted.
Open between every pair of pins: failed open, or a part that reads open when working.
On the board
this is a first look only: the meter reads every path between those pins, and a short can be a neighbour. Lift one leg before you condemn it.
Compare:
If an identical part sits elsewhere on the board, measure it the same way: that is what this one should read.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
MAX8888UK33printed ADQCSOT-23-55 pins, Analog DevicesNot recordedSOT-23-55 pinsAnalog Devices
Printed ADQC on the part. Easy to misread as ADDC. Check that character with a loupe before you order anything.
What it is
Not recorded
Maker
Analog Devices
Package
SOT-23-5
Pins
5
Source
Published code list
Is it dead?
Diode range and ohms range, part lifted.
Working, it reads
Depends on what it is. The datasheet, or an identical part, says.
Dead, it reads
Between two pins, the same reading both ways, near 0 V with a continuous beep: shorted.
Open between every pair of pins: failed open, or a part that reads open when working.
On the board
this is a first look only: the meter reads every path between those pins, and a short can be a neighbour. Lift one leg before you condemn it.
Compare:
If an identical part sits elsewhere on the board, measure it the same way: that is what this one should read.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
R3117Q122Aprinted A006SOT-23-5Voltage supervisor, 5 pins, RicohVoltage supervisorSOT-23-55 pinsRicoh
Printed A006 on the part. Easy to misread as ADDC. Check that character with a loupe before you order anything.
What it is
Voltage supervisor
Maker
Ricoh
Package
SOT-23-5
Pins
5
Details
Voltage detector IC: 1.2V±1%, -Reset ODO, Sense
Source
Published code list
Is it dead?
Voltage with the board powered; ohms from each pin to ground with it off.
Working, it reads
Supply pin at its voltage and the output doing what the datasheet says. Readings between pins depend on the part.
Dead, it reads
A pin near 0 Ω to ground or to the supply pin where an identical part does not read that: failed short.
Supply present, output stuck: failed, or its load has.
On the board:
A pin shorted to ground on the board can be anything on that net. Lift the pin to be sure.
Compare:
The surest reference is the same IC on a working board, measured pin by pin.
Watch for:
Its protection diodes can read like junctions between pins, even like a transistor. That proves nothing either way.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
RP171Q162Dprinted AD06SOT-23-5LDO regulator, 5 pins, RicohLDO regulatorSOT-23-55 pinsRicoh
Printed AD06 on the part. Easy to misread as ADDC. Check that character with a loupe before you order anything.
What it is
LDO regulator
Maker
Ricoh
Package
SOT-23-5
Pins
5
Details
Linear voltage regulator IC: LDO, 1.6V±1%, 150mA, +CE, CL
Source
Published code list
Is it dead?
Voltage, board powered, black probe on ground. Then ohms with the power off.
Working, it reads
Input pin at the supply, output pin at its rated voltage, and the enable pin high if it has one.
Dead, it reads
Output equal to the input: the pass element has shorted. Everything after it may have taken the full input.
Input present, enable high, no output: failed open, or holding itself off into a shorted load. Power off and measure output to ground.
Power off, input to output near 0 Ω: shorted.
On the board:
An output at 0 V is often a shorted load with the regulator in current limit. Lift the output pin: if the short stays on the board, the regulator may be fine.
Compare:
The same regulator on another rail or another board shows the right voltages and the right resistances.
Watch for:
Makers put input, output and ground on different pins in the same package, so take them from this part's datasheet. Diode or ohms readings between its pins say little; check it powered.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
TC1301ADOCVMFprinted ADOCDFNMicrochipNot recordedDFNNot recordedMicrochip
Printed ADOC on the part. Easy to misread as ADDC. Check that character with a loupe before you order anything.
What it is
Not recorded
Maker
Microchip
Package
DFN
Pins
Not recorded
Details
Linear voltage regulator with volatge detector: LDO, Dual out, Vo1/Vo2=3.0V(300mA)/1.9V(150mA)±2.5%, Vdet=2.32V±2.5%, +…
Source
Published code list
Is it dead?
Voltage, board powered, black probe on ground. Then ohms with the power off.
Working, it reads
Input pin at the supply, output pin at its rated voltage, and the enable pin high if it has one.
Dead, it reads
Output equal to the input: the pass element has shorted. Everything after it may have taken the full input.
Input present, enable high, no output: failed open, or holding itself off into a shorted load. Power off and measure output to ground.
Power off, input to output near 0 Ω: shorted.
On the board:
An output at 0 V is often a shorted load with the regulator in current limit. Lift the output pin: if the short stays on the board, the regulator may be fine.
Compare:
The same regulator on another rail or another board shows the right voltages and the right resistances.
Watch for:
Makers put input, output and ground on different pins in the same package, so take them from this part's datasheet. Diode or ohms readings between its pins say little; check it powered.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
TC1301ADQCVMFprinted ADQCDFNMicrochipNot recordedDFNNot recordedMicrochip
Printed ADQC on the part. Easy to misread as ADDC. Check that character with a loupe before you order anything.
What it is
Not recorded
Maker
Microchip
Package
DFN
Pins
Not recorded
Details
Linear voltage regulator with volatge detector: LDO, Dual out, Vo1/Vo2=3.0V(300mA)/1.7V(150mA)±2.5%, Vdet=2.32V±2.5%, +…
Source
Published code list
Is it dead?
Voltage, board powered, black probe on ground. Then ohms with the power off.
Working, it reads
Input pin at the supply, output pin at its rated voltage, and the enable pin high if it has one.
Dead, it reads
Output equal to the input: the pass element has shorted. Everything after it may have taken the full input.
Input present, enable high, no output: failed open, or holding itself off into a shorted load. Power off and measure output to ground.
Power off, input to output near 0 Ω: shorted.
On the board:
An output at 0 V is often a shorted load with the regulator in current limit. Lift the output pin: if the short stays on the board, the regulator may be fine.
Compare:
The same regulator on another rail or another board shows the right voltages and the right resistances.
Watch for:
Makers put input, output and ground on different pins in the same package, so take them from this part's datasheet. Diode or ohms readings between its pins say little; check it powered.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
TC1301AODCVMFprinted AODCDFNMicrochipNot recordedDFNNot recordedMicrochip
Printed AODC on the part. Easy to misread as ADDC. Check that character with a loupe before you order anything.
What it is
Not recorded
Maker
Microchip
Package
DFN
Pins
Not recorded
Details
Linear voltage regulator with volatge detector: LDO, Dual out, Vo1/Vo2=1.9V(300mA)/3.0V(150mA)±2.5%, Vdet=2.32V±2.5%, +…
Source
Published code list
Is it dead?
Voltage, board powered, black probe on ground. Then ohms with the power off.
Working, it reads
Input pin at the supply, output pin at its rated voltage, and the enable pin high if it has one.
Dead, it reads
Output equal to the input: the pass element has shorted. Everything after it may have taken the full input.
Input present, enable high, no output: failed open, or holding itself off into a shorted load. Power off and measure output to ground.
Power off, input to output near 0 Ω: shorted.
On the board:
An output at 0 V is often a shorted load with the regulator in current limit. Lift the output pin: if the short stays on the board, the regulator may be fine.
Compare:
The same regulator on another rail or another board shows the right voltages and the right resistances.
Watch for:
Makers put input, output and ground on different pins in the same package, so take them from this part's datasheet. Diode or ohms readings between its pins say little; check it powered.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
TC1301AOOCVMFprinted AOOCDFNMicrochipNot recordedDFNNot recordedMicrochip
Printed AOOC on the part. Easy to misread as ADDC. Check that character with a loupe before you order anything.
What it is
Not recorded
Maker
Microchip
Package
DFN
Pins
Not recorded
Details
Linear voltage regulator with volatge detector: LDO, Dual out, Vo1/Vo2=1.9V(300mA)/1.9V(150mA)±2.5%, Vdet=2.32V±2.5%, +…
Source
Published code list
Is it dead?
Voltage, board powered, black probe on ground. Then ohms with the power off.
Working, it reads
Input pin at the supply, output pin at its rated voltage, and the enable pin high if it has one.
Dead, it reads
Output equal to the input: the pass element has shorted. Everything after it may have taken the full input.
Input present, enable high, no output: failed open, or holding itself off into a shorted load. Power off and measure output to ground.
Power off, input to output near 0 Ω: shorted.
On the board:
An output at 0 V is often a shorted load with the regulator in current limit. Lift the output pin: if the short stays on the board, the regulator may be fine.
Compare:
The same regulator on another rail or another board shows the right voltages and the right resistances.
Watch for:
Makers put input, output and ground on different pins in the same package, so take them from this part's datasheet. Diode or ohms readings between its pins say little; check it powered.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
TC1301AOQCVMFprinted AOQCDFNMicrochipNot recordedDFNNot recordedMicrochip
Printed AOQC on the part. Easy to misread as ADDC. Check that character with a loupe before you order anything.
What it is
Not recorded
Maker
Microchip
Package
DFN
Pins
Not recorded
Details
Linear voltage regulator with volatge detector: LDO, Dual out, Vo1/Vo2=1.9V(300mA)/1.7V(150mA)±2.5%, Vdet=2.32V±2.5%, +…
Source
Published code list
Is it dead?
Voltage, board powered, black probe on ground. Then ohms with the power off.
Working, it reads
Input pin at the supply, output pin at its rated voltage, and the enable pin high if it has one.
Dead, it reads
Output equal to the input: the pass element has shorted. Everything after it may have taken the full input.
Input present, enable high, no output: failed open, or holding itself off into a shorted load. Power off and measure output to ground.
Power off, input to output near 0 Ω: shorted.
On the board:
An output at 0 V is often a shorted load with the regulator in current limit. Lift the output pin: if the short stays on the board, the regulator may be fine.
Compare:
The same regulator on another rail or another board shows the right voltages and the right resistances.
Watch for:
Makers put input, output and ground on different pins in the same package, so take them from this part's datasheet. Diode or ohms readings between its pins say little; check it powered.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
TC1301AQDCVMFprinted AQDCDFNMicrochipNot recordedDFNNot recordedMicrochip
Printed AQDC on the part. Easy to misread as ADDC. Check that character with a loupe before you order anything.
What it is
Not recorded
Maker
Microchip
Package
DFN
Pins
Not recorded
Details
Linear voltage regulator with volatge detector: LDO, Dual out, Vo1/Vo2=1.7V(300mA)/3.0V(150mA)±2.5%, Vdet=2.32V±2.5%, +…
Source
Published code list
Is it dead?
Voltage, board powered, black probe on ground. Then ohms with the power off.
Working, it reads
Input pin at the supply, output pin at its rated voltage, and the enable pin high if it has one.
Dead, it reads
Output equal to the input: the pass element has shorted. Everything after it may have taken the full input.
Input present, enable high, no output: failed open, or holding itself off into a shorted load. Power off and measure output to ground.
Power off, input to output near 0 Ω: shorted.
On the board:
An output at 0 V is often a shorted load with the regulator in current limit. Lift the output pin: if the short stays on the board, the regulator may be fine.
Compare:
The same regulator on another rail or another board shows the right voltages and the right resistances.
Watch for:
Makers put input, output and ground on different pins in the same package, so take them from this part's datasheet. Diode or ohms readings between its pins say little; check it powered.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
TC1301AQOCVMFprinted AQOCDFNMicrochipNot recordedDFNNot recordedMicrochip
Printed AQOC on the part. Easy to misread as ADDC. Check that character with a loupe before you order anything.
What it is
Not recorded
Maker
Microchip
Package
DFN
Pins
Not recorded
Details
Linear voltage regulator with volatge detector: LDO, Dual out, Vo1/Vo2=1.7V(300mA)/1.9V(150mA)±2.5%, Vdet=2.32V±2.5%, +…
Source
Published code list
Is it dead?
Voltage, board powered, black probe on ground. Then ohms with the power off.
Working, it reads
Input pin at the supply, output pin at its rated voltage, and the enable pin high if it has one.
Dead, it reads
Output equal to the input: the pass element has shorted. Everything after it may have taken the full input.
Input present, enable high, no output: failed open, or holding itself off into a shorted load. Power off and measure output to ground.
Power off, input to output near 0 Ω: shorted.
On the board:
An output at 0 V is often a shorted load with the regulator in current limit. Lift the output pin: if the short stays on the board, the regulator may be fine.
Compare:
The same regulator on another rail or another board shows the right voltages and the right resistances.
Watch for:
Makers put input, output and ground on different pins in the same package, so take them from this part's datasheet. Diode or ohms readings between its pins say little; check it powered.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
TC1301AQQCVMFprinted AQQCDFNMicrochipNot recordedDFNNot recordedMicrochip
Printed AQQC on the part. Easy to misread as ADDC. Check that character with a loupe before you order anything.
What it is
Not recorded
Maker
Microchip
Package
DFN
Pins
Not recorded
Details
Linear voltage regulator with volatge detector: LDO, Dual out, Vo1/Vo2=1.7V(300mA)/1.7V(150mA)±2.5%, Vdet=2.32V±2.5%, +…
Source
Published code list
Is it dead?
Voltage, board powered, black probe on ground. Then ohms with the power off.
Working, it reads
Input pin at the supply, output pin at its rated voltage, and the enable pin high if it has one.
Dead, it reads
Output equal to the input: the pass element has shorted. Everything after it may have taken the full input.
Input present, enable high, no output: failed open, or holding itself off into a shorted load. Power off and measure output to ground.
Power off, input to output near 0 Ω: shorted.
On the board:
An output at 0 V is often a shorted load with the regulator in current limit. Lift the output pin: if the short stays on the board, the regulator may be fine.
Compare:
The same regulator on another rail or another board shows the right voltages and the right resistances.
Watch for:
Makers put input, output and ground on different pins in the same package, so take them from this part's datasheet. Diode or ohms readings between its pins say little; check it powered.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
U74AHC1G00G-AE5printed A00GSOT-23-55 pins, UnisonicNot recordedSOT-23-55 pinsUnisonic
Printed A00G on the part. Easy to misread as ADDC. Check that character with a loupe before you order anything.
What it is
Not recorded
Maker
Unisonic
Package
SOT-23-5
Pins
5
Details
CMOS logic IC: 2-input NAND gate, H-free
Source
Published code list
Is it dead?
Voltage with the board powered; ohms from each pin to ground with it off.
Working, it reads
Supply pin at its voltage and the output doing what the datasheet says. Readings between pins depend on the part.
Dead, it reads
A pin near 0 Ω to ground or to the supply pin where an identical part does not read that: failed short.
Supply present, output stuck: failed, or its load has.
On the board:
A pin shorted to ground on the board can be anything on that net. Lift the pin to be sure.
Compare:
The surest reference is the same IC on a working board, measured pin by pin.
Watch for:
Its protection diodes can read like junctions between pins, even like a transistor. That proves nothing either way.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
U74AHC1G00G-AF5printed A00GSOT-23-55 pins, UnisonicNot recordedSOT-23-55 pinsUnisonic
Printed A00G on the part. Easy to misread as ADDC. Check that character with a loupe before you order anything.
What it is
Not recorded
Maker
Unisonic
Package
SOT-23-5
Pins
5
Details
CMOS logic IC: 2-input NAND gate, H-free
Source
Published code list
Is it dead?
Voltage with the board powered; ohms from each pin to ground with it off.
Working, it reads
Supply pin at its voltage and the output doing what the datasheet says. Readings between pins depend on the part.
Dead, it reads
A pin near 0 Ω to ground or to the supply pin where an identical part does not read that: failed short.
Supply present, output stuck: failed, or its load has.
On the board:
A pin shorted to ground on the board can be anything on that net. Lift the pin to be sure.
Compare:
The surest reference is the same IC on a working board, measured pin by pin.
Watch for:
Its protection diodes can read like junctions between pins, even like a transistor. That proves nothing either way.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
U74AHC1G00G-AL5printed A00GSOT-3535 pins, UnisonicNot recordedSOT-3535 pinsUnisonic
Printed A00G on the part. Easy to misread as ADDC. Check that character with a loupe before you order anything.
What it is
Not recorded
Maker
Unisonic
Package
SOT-353
Pins
5
Details
CMOS logic IC: 2-input NAND gate, H-free
Source
Published code list
Is it dead?
Voltage with the board powered; ohms from each pin to ground with it off.
Working, it reads
Supply pin at its voltage and the output doing what the datasheet says. Readings between pins depend on the part.
Dead, it reads
A pin near 0 Ω to ground or to the supply pin where an identical part does not read that: failed short.
Supply present, output stuck: failed, or its load has.
On the board:
A pin shorted to ground on the board can be anything on that net. Lift the pin to be sure.
Compare:
The surest reference is the same IC on a working board, measured pin by pin.
Watch for:
Its protection diodes can read like junctions between pins, even like a transistor. That proves nothing either way.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
4 more parts have no package on record
- RP102K261Dprinted AD06LDO regulator, RicohLDO regulatorNot recordedNot recordedRicoh
  Printed AD06 on the part. Easy to misread as ADDC. Check that character with a loupe before you order anything.
  What it is
  LDO regulator
  Maker
  Ricoh
  Package
  Not recorded
  Pins
  Not recorded
  Details
  Linear voltage regulator IC: LDO, LN, 2.6V±1%, 300mA, +CE, CL
  Source
  Published code list
  Is it dead?
  Voltage, board powered, black probe on ground. Then ohms with the power off.
  Working, it reads
  Input pin at the supply, output pin at its rated voltage, and the enable pin high if it has one.
  Dead, it reads
  Output equal to the input: the pass element has shorted. Everything after it may have taken the full input.
  Input present, enable high, no output: failed open, or holding itself off into a shorted load. Power off and measure output to ground.
  Power off, input to output near 0 Ω: shorted.
  On the board:
  An output at 0 V is often a shorted load with the regulator in current limit. Lift the output pin: if the short stays on the board, the regulator may be fine.
  Compare:
  The same regulator on another rail or another board shows the right voltages and the right resistances.
  Watch for:
  Makers put input, output and ground on different pins in the same package, so take them from this part's datasheet. Diode or ohms readings between its pins say little; check it powered.
  A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
- XC9276B006ER-Gprinted A006DC-DC converter, TorexDC-DC converterNot recordedNot recordedTorex
  Printed A006 on the part. Easy to misread as ADDC. Check that character with a loupe before you order anything.
  What it is
  DC-DC converter
  Maker
  Torex
  Package
  Not recorded
  Pins
  Not recorded
  Details
  DC/DC voltage converter IC: PFM, st-dwn, Vout=0.6(Vset=Low) or Vout=0.9V(Vset=High), +CE
  Source
  Published code list
  Is it dead?
  Voltage with the board powered; ohms from each pin to ground with it off.
  Working, it reads
  Supply pin at its voltage and the output doing what the datasheet says. Readings between pins depend on the part.
  Dead, it reads
  A pin near 0 Ω to ground or to the supply pin where an identical part does not read that: failed short.
  Supply present, output stuck: failed, or its load has.
  On the board:
  A pin shorted to ground on the board can be anything on that net. Lift the pin to be sure.
  Compare:
  The surest reference is the same IC on a working board, measured pin by pin.
  Watch for:
  Its protection diodes can read like junctions between pins, even like a transistor. That proves nothing either way.
  A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
- XC9276B006MR-Gprinted A006DC-DC converter, TorexDC-DC converterNot recordedNot recordedTorex
  Printed A006 on the part. Easy to misread as ADDC. Check that character with a loupe before you order anything.
  What it is
  DC-DC converter
  Maker
  Torex
  Package
  Not recorded
  Pins
  Not recorded
  Details
  DC/DC voltage converter IC: PFM, st-dwn, Vout=0.6(Vset=Low) or Vout=0.9V(Vset=High), +CE
  Source
  Published code list
  Is it dead?
  Voltage with the board powered; ohms from each pin to ground with it off.
  Working, it reads
  Supply pin at its voltage and the output doing what the datasheet says. Readings between pins depend on the part.
  Dead, it reads
  A pin near 0 Ω to ground or to the supply pin where an identical part does not read that: failed short.
  Supply present, output stuck: failed, or its load has.
  On the board:
  A pin shorted to ground on the board can be anything on that net. Lift the pin to be sure.
  Compare:
  The surest reference is the same IC on a working board, measured pin by pin.
  Watch for:
  Its protection diodes can read like junctions between pins, even like a transistor. That proves nothing either way.
  A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
- XC9276B0060R-Gprinted A006DC-DC converter, TorexDC-DC converterNot recordedNot recordedTorex
  Printed A006 on the part. Easy to misread as ADDC. Check that character with a loupe before you order anything.
  What it is
  DC-DC converter
  Maker
  Torex
  Package
  Not recorded
  Pins
  Not recorded
  Details
  DC/DC voltage converter IC: PFM, st-dwn, Vout=0.6(Vset=Low) or Vout=0.9V(Vset=High), +CE
  Source
  Published code list
  Is it dead?
  Voltage with the board powered; ohms from each pin to ground with it off.
  Working, it reads
  Supply pin at its voltage and the output doing what the datasheet says. Readings between pins depend on the part.
  Dead, it reads
  A pin near 0 Ω to ground or to the supply pin where an identical part does not read that: failed short.
  Supply present, output stuck: failed, or its load has.
  On the board:
  A pin shorted to ground on the board can be anything on that net. Lift the pin to be sure.
  Compare:
  The surest reference is the same IC on a working board, measured pin by pin.
  Watch for:
  Its protection diodes can read like junctions between pins, even like a transistor. That proves nothing either way.
  A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.

2 more parts have codes that begin with ADDC

Codes that begin with ADDC

For a marking with its end worn or burnt off. Each one shows its full printed code.

TVS diode, all SMA, 2 pins, all WeEn Semiconductors.

SMAJ6.0Aprinted A006AJSMA
Printed A006AJ. Only the start matches what you typed, so this fits only if the rest of the marking is worn off.
What it is
TVS diode
Maker
WeEn Semiconductors
Package
SMA
Pins
2
Source
Manufacturer datasheet
Is it dead?
Diode range, from the protected line to ground, part lifted if you can.
Working, it reads
A one-way part reads about 0.6 to 0.8 V forward and open in reverse. A two-way part reads open both ways. Arrays with several lines read as the datasheet's diagram draws them.
Dead, it reads
From the line to ground, the same reading both ways, near 0 V with a continuous beep: shorted.
A reading both ways on a one-way part: leaky.
A one-way part open both ways: failed open.
On the board
, a line reading shorted to ground can be this part or anything else on that line. Lift it: if the short goes with it, it has failed.
Compare:
The same part on the next line or connector pin is the healthy reading to compare with.
Watch for:
A two-way part reads open both ways when it is good, exactly like one that has failed open. The meter cannot tell them apart; an identical part on the next line can.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
Datasheetfor SMAJ6.0A, opens in a new tab
SMAJ6.0CAprinted A006CJSMA
Printed A006CJ. Only the start matches what you typed, so this fits only if the rest of the marking is worn off.
What it is
TVS diode
Maker
WeEn Semiconductors
Package
SMA
Pins
2
Source
Published code list
Is it dead?
Diode range, from the protected line to ground, part lifted if you can.
Working, it reads
A one-way part reads about 0.6 to 0.8 V forward and open in reverse. A two-way part reads open both ways. Arrays with several lines read as the datasheet's diagram draws them.
Dead, it reads
From the line to ground, the same reading both ways, near 0 V with a continuous beep: shorted.
A reading both ways on a one-way part: leaky.
A one-way part open both ways: failed open.
On the board
, a line reading shorted to ground can be this part or anything else on that line. Lift it: if the short goes with it, it has failed.
Compare:
The same part on the next line or connector pin is the healthy reading to compare with.
Watch for:
A two-way part reads open both ways when it is good, exactly like one that has failed open. The meter cannot tell them apart; an identical part on the next line can.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
Datasheetfor SMAJ6.0CA, opens in a new tab

Did you find your part?

One code, several parts

Marking codes are not unique. In the standard code book, 6H on a SOT-23 is an NPN transistor, a varicap, an N-channel JFET, two digital transistors, a 3.6 V voltage detector: six parts from five makers. So a search shows the parts we hold under that code and under codes easily misread as it, with only the columns that tell them apart.

6Hon a SOT-23, in the code book

NPN transistor
Varicap
N-channel JFET
Digital transistor ×2
3.6 V voltage detector

When more than one is left

Tap Help me choose. Up to 4 quick answers: whether the part has failed, then what separates the parts left. Those get ranked with the reasoning and a test that settles it. That uses one identification: 2 a month are free without an account, and 3 with a free account.

When you cannot read it

Tap the camera in the field. We read the characters, keep the ones we are unsure of, and search every reading. A photo too soft to read is turned back on your phone first; if it is the only one you can get, you can still send it.

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SMD code search: identify a part by its marking

What’s printed on it?

TC1301ADDCVMF

Is it dead?

Printed with a code easy to misread

Is it dead?

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Codes that begin with ADDC

Is it dead?

Is it dead?

Did you find your part?

One code, several parts

When more than one is left

When you cannot read it

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