SMD code KM in SOT-353
Marking codes are not standardised, and the same code is reused by unrelated makers for unrelated parts. Below is every part in our tables printed with it, and any printed with a code that is easy to misread as it, from the manufacturers' own marking tables and published code lists.
1 part in SOT-353 is printed KM
Not sure which one you have?
Answer up to 4 quick questions and these 31 parts are ranked, with a meter test that settles it. It works on a dead part too.
ELM7322NBC1ASOT-353Voltage supervisor, ELM TechnologyVoltage supervisorELM Technology
- What it is
- Voltage supervisor
- Maker
- ELM Technology
- Package
- SOT-353
- Pins
- 5
- Details
- Voltage detector IC: 2.2V±30mV, -Reset ODO, -MR
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
14 more parts have no package on record. Nothing rules them out, so they stay.
NCV8187AMTW110LDO regulator, onsemiLDO regulatoronsemi
- What it is
- LDO regulator
- Maker
- onsemi
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Voltage Regulator - Low Iq, Low Dropout, Power Good Output
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Voltage regulator.
NCV8720BMTW150LDO regulator, onsemiLDO regulatoronsemi
- What it is
- LDO regulator
- Maker
- onsemi
- Package
- Not recorded
- Pins
- Not recorded
- Details
- CMOS Voltage Regulator, Very Low Dropout Bias Rail, 350 mA
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Voltage regulator.
SMF7.0A-MFHTVS diode, Formosa MicrosemiTVS diodeFormosa Microsemi
- What it is
- TVS diode
- Maker
- Formosa Microsemi
- Package
- Not recorded
- Pins
- Not recorded
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
SMF7.0A-MFLTVS diode, Formosa MicrosemiTVS diodeFormosa Microsemi
- What it is
- TVS diode
- Maker
- Formosa Microsemi
- Package
- Not recorded
- Pins
- Not recorded
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
SMF7.0A-MSTVS diode, Formosa MicrosemiTVS diodeFormosa Microsemi
- What it is
- TVS diode
- Maker
- Formosa Microsemi
- Package
- Not recorded
- Pins
- Not recorded
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
BD49L30GVoltage supervisor, ROHMVoltage supervisorROHM
- What it is
- Voltage supervisor
- Maker
- ROHM
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Voltage Detector
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
BU46L462GVoltage supervisor, ROHMVoltage supervisorROHM
- What it is
- Voltage supervisor
- Maker
- ROHM
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Voltage detector IC: 4.6V±1%, -Reset PPO, Rdt=200ms
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
BU4928FVoltage supervisor, ROHMVoltage supervisorROHM
- What it is
- Voltage supervisor
- Maker
- ROHM
- Package
- Not recorded
- Pins
- Not recorded
- Details
- CMOS-IC: Voltage Detector 2,8V, Reset Push-pull output
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
BU4928FWEVoltage supervisor, ROHMVoltage supervisorROHM
- What it is
- Voltage supervisor
- Maker
- ROHM
- Package
- Not recorded
- Pins
- Not recorded
- Details
- CMOS-IC: Voltage Detector 2,8V, Reset Push-pull output
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
BU4928GVoltage supervisor, ROHMVoltage supervisorROHM
- What it is
- Voltage supervisor
- Maker
- ROHM
- Package
- Not recorded
- Pins
- Not recorded
- Details
- CMOS-IC: Voltage Detector 2,8V, Reset Push-pull output
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
FP6811-23CC8PVoltage supervisor, FitipowerVoltage supervisorFitipower
- What it is
- Voltage supervisor
- Maker
- Fitipower
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Voltage detector IC: 2.32V±1.5%, -Reset PPO, -MR
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
IXD5120C192NR-GVoltage supervisor, IXYSVoltage supervisorIXYS
- What it is
- Voltage supervisor
- Maker
- IXYS
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Voltage detector IC: 1.9V±2% -Reset PPO
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
IXD5127C34CNRVoltage supervisor, IXYSVoltage supervisorIXYS
- What it is
- Voltage supervisor
- Maker
- IXYS
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Voltage detector IC: 3.4V±0.8%, -Reset PPO, -MR, 200ms Rt delay
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
IXD5127N34HNRVoltage supervisor, IXYSVoltage supervisorIXYS
- What it is
- Voltage supervisor
- Maker
- IXYS
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Voltage detector IC: 3.4V±0.8%, +Reset ODO, -MR, 200ms Rt delay
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
Is it dead? One meter test per kind
Parts of the same kind are tested the same way, so each test is here once. Each part above points to its own.
Integrated circuit
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.
Voltage regulator
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.
TVS or ESD protection diode
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.
Codes that begin with KM
For a marking with its end worn or burnt off. Each code has a page of its own.
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