SMD code TI- in SOT-23
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.
Not sure which one you have?
Answer up to 4 quick questions and these 50 parts are ranked, with a meter test that settles it. It works on a dead part too.
Nothing is printed exactly TI-
These parts are printed with a character that is easy to misread as what you typed. The odd one out is marked on each.
UN212Xprinted 7ISOT-233 pins, PanNot recordedSOT-233 pinsPan
Printed 7I on the part. Easy to misread as TI-. Check that character with a loupe before you order anything.
- What it is
- Not recorded
- Maker
- Pan
- Package
- SOT-23
- Pins
- 3
- Details
- Si-pnp-Digi: Sw, 50V, 500mA, 200mW, 200MHz, R1/R2=270R/5k
- Source
- Published code list
Is it dead? The meter test is below: This part.
UNR212Xprinted 7ISOT-233 pins, PanNot recordedSOT-233 pinsPan
Printed 7I on the part. Easy to misread as TI-. Check that character with a loupe before you order anything.
- What it is
- Not recorded
- Maker
- Pan
- Package
- SOT-23
- Pins
- 3
- Details
- Si-pnp-Digi: Sw, 50V, 500mA, 200mW, 200MHz, R1/R2=270R/5k
- Source
- Published code list
Is it dead? The meter test is below: This part.
BTC5181WC3printed T1SOT-523NPN transistor, 3 pins, CYStekNPN transistorSOT-5233 pinsCYStek
Printed T1 on the part. Easy to misread as TI-. Check that character with a loupe before you order anything.
- What it is
- NPN transistor
- Maker
- CYStek
- Package
- SOT-523
- Pins
- 3
- Details
- 3 V, 0.01 A NPN transistor
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: NPN transistor.
12 more parts have no package on record. Nothing rules them out, so they stay.
ESDBNC3V3A1Cprinted T1ESD protection diode, JSCJESD protection diodeNot recordedNot recordedJSCJ
Printed T1 on the part. Easy to misread as TI-. Check that character with a loupe before you order anything.
- What it is
- ESD protection diode
- Maker
- JSCJ
- Package
- Not recorded
- Pins
- Not recorded
- Details
- ESD protection diode, VRWM 3.3 V
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
NCP136AFCT110printed 7LLDO regulator, onsemiLDO regulatorNot recordedNot recordedonsemi
Printed 7L on the part. Easy to misread as TI-. Check that character with a loupe before you order anything.
- What it is
- LDO regulator
- Maker
- onsemi
- Package
- Not recorded
- Pins
- Not recorded
- Details
- LDO Regulator - Very Low Dropout, CMOS, Bias Rail
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Voltage regulator.
NCP187AMT330printed TLLDO regulator, onsemiLDO regulatorNot recordedNot recordedonsemi
Printed TL on the part. Easy to misread as TI-. Check that character with a loupe before you order anything.
- 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.
NCP1529MUprinted TLDC-DC converter, onsemiDC-DC converterNot recordedNot recordedonsemi
Printed TL on the part. Easy to misread as TI-. Check that character with a loupe before you order anything.
- What it is
- DC-DC converter
- Maker
- onsemi
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Buck Converter - DC-DC, High Efficiency, Adjustable Output Voltage, Low Ripple
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Integrated circuit.
RTQ035P02HZGprinted TLP-channel MOSFET, ROHMP-channel MOSFETNot recordedNot recordedROHM
Printed TL on the part. Easy to misread as TI-. Check that character with a loupe before you order anything.
- What it is
- P-channel MOSFET
- Maker
- ROHM
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Pch -20V -3.5A Small Signal MOSFET
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: P-channel MOSFET.
TCK207Gprinted 7LLoad switch, ToshibaLoad switchNot recordedNot recordedToshiba
Printed 7L on the part. Easy to misread as TI-. Check that character with a loupe before you order anything.
- What it is
- Load switch
- Maker
- Toshiba
- Package
- Not recorded
- Pins
- Not recorded
- Details
- 0.75 V, 2A Load Switch IC with Reverse Current Blocking in Ultra Small Package
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Load switch.
TCN1-23+printed T1RF transformer, Mini-CircuitsRF transformerNot recordedNot recordedMini-Circuits
Printed T1 on the part. Easy to misread as TI-. Check that character with a loupe before you order anything.
- What it is
- RF transformer
- Maker
- Mini-Circuits
- Package
- Not recorded
- Pins
- Not recorded
- Details
- RF transformer, 1300-2300 MHz
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: This part.
TL431IDMprinted T-IVoltage reference, onsemiVoltage referenceNot recordedNot recordedonsemi
Printed T-I on the part. Easy to misread as TI-. Check that character with a loupe before you order anything.
- What it is
- Voltage reference
- Maker
- onsemi
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Programmable Precision References B Series, B Series
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Integrated circuit.
TST11-511Wprinted T1Schottky diode, Taitron ComponentsSchottky diodeNot recordedNot recordedTaitron Components
Printed T1 on the part. Easy to misread as TI-. Check that character with a loupe before you order anything.
- What it is
- Schottky diode
- Maker
- Taitron Components
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Schottky Barrier Diodes (Multiple Terminals)
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Schottky diode.
WNMD2171-4printed 71N-channel MOSFET, WillsemiN-channel MOSFETNot recordedNot recordedWillsemi
Printed 71 on the part. Easy to misread as TI-. Check that character with a loupe before you order anything.
- What it is
- N-channel MOSFET
- Maker
- Willsemi
- Package
- Not recorded
- Pins
- Not recorded
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: N-channel MOSFET.
AD5112BCPZ10-RL7printed 7L8 pins, Analog DevicesNot recordedNot recorded8 pinsAnalog Devices
Printed 7L on the part. Easy to misread as TI-. Check that character with a loupe before you order anything.
- What it is
- Not recorded
- Maker
- Analog Devices
- Package
- Not recorded
- Pins
- 8
- Source
- Published code list
Is it dead? The meter test is below: This part.
ADP162ACBZ-1.8-R7printed 714 pins, Analog DevicesNot recordedNot recorded4 pinsAnalog Devices
Printed 71 on the part. Easy to misread as TI-. Check that character with a loupe before you order anything.
- What it is
- Not recorded
- Maker
- Analog Devices
- Package
- Not recorded
- Pins
- 4
- Details
- equivalent [1.8V LDO]
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
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.
This part
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.
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.
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.
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.
P-channel MOSFET
Diode range, part lifted. Test drain to source first, then short gate to source and test again.
Working, it reads
Red probe on the drain, black on the source: about 0.4 to 0.9 V, the body diode. Open the other way. The gate reads open to both other pins, both ways.
Dead, it reads
- Drain to source the same both ways, near 0 V with a continuous beep, and still so after shorting gate to source: shorted. The classic failure.
- The gate reads low to source or drain: gate shorted. Often all three pins end up shorted together.
- No body diode at all: failed open.
- On the board
- the gate usually has a resistor to the source, so gate to source reads that resistor, which is not a fault. Lift a leg to be sure.
- Compare:
- If an identical part sits elsewhere on the board, measure it the same way: that is what this one should read.
- Watch for:
- The diode range can charge the gate enough to turn the part on, and then drain to source reads near 0 both ways on a good part. Short gate to source and test again before you condemn it.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
Load switch
Voltage, board powered, black probe on ground.
Working, it reads
Switched on, the output pin sits at the input voltage. Switched off, it sits near 0 V.
Dead, it reads
- Output at the input voltage while switched off: the pass element has shorted.
- Input present and switched on, no output: failed open, or shut down into a shorted load. Power off and measure output to ground.
- On the board:
- An output near 0 Ω to ground is usually the load. Lift the output pin to see which.
- Compare:
- If an identical part sits elsewhere on the board, measure it the same way: that is what this one should read.
- Watch for:
- The pinout and whether the enable is active high or low differ between parts. The datasheet gives both.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
Schottky diode
Diode range, part lifted or one leg off the pad. Red probe on the anode.
Working, it reads
About 0.15 to 0.45 V anode to cathode, roughly half a silicon diode, and open the other way.
Dead, it reads
- The same reading both ways round, near 0 V with a continuous beep or the same middling value: shorted.
- A reading the wrong way round as well: leaky.
- Open both ways: failed open.
- 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.
- Watch for:
- A large Schottky can read about 0.1 V forward and beep like a short, and leaks a little the wrong way when good, more when warm. It is shorted only if it reads the same both ways. Measure it cold, beside an identical cold one.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
N-channel MOSFET
Diode range, part lifted. Test drain to source first, then short gate to source and test again.
Working, it reads
Red probe on the source, black on the drain: about 0.4 to 0.9 V, the body diode. Open the other way. The gate reads open to both other pins, both ways.
Dead, it reads
- Drain to source the same both ways, near 0 V with a continuous beep, and still so after shorting gate to source: shorted. The classic failure.
- The gate reads low to source or drain: gate shorted. Often all three pins end up shorted together.
- No body diode at all: failed open.
- On the board
- the gate usually has a resistor to the source, so gate to source reads that resistor, which is not a fault. A drain short can be the load. Lift a leg to be sure.
- Compare:
- If an identical part sits elsewhere on the board, measure it the same way: that is what this one should read.
- Watch for:
- The diode range can charge the gate enough to turn the part on, and then drain to source reads near 0 both ways on a good part. Short gate to source and test again before you condemn it.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
NPN transistor
Diode range, part lifted or its base leg off the pad.
Working, it reads
Red probe on the base reads about 0.6 to 0.75 V to the emitter and to the collector, and open the other way round. Collector to emitter reads open both ways.
Dead, it reads
- Collector to emitter the same both ways, near 0 V with a continuous beep: shorted. The commonest failure.
- The base the same both ways to another pin, near 0 V or a middling value: a shorted junction.
- Only one junction reads, or none: a junction has failed open. It then looks like a diode.
- A reading the wrong way round, where it should be open: leaky.
- 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.
- Watch for:
- A pair of diodes with a common pin reads just like a transistor, and some transistors carry a built-in diode or resistor. The datasheet says which.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
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