SMD code 156
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.
156 on a chip resistor
15 MΩ
15 MΩ resistor, 5%
15 followed by 6 zeros. Three digits is normally the 5% series. The same marking also reads as 15 µF on a capacitor, and nothing in the code says which; the body of the part does.
Other readings of the same characters, most likely first
- 15 µF capacitor
Check it with a meter
Lift one end and measure across it. A good one reads 15 MΩ within 5%. Measuring it in circuit reads the parallel combination of everything around it, which is almost always lower, never higher: well above 15 MΩ on the board is a fault. Open, or well above 15 MΩ, means it has failed: burnt, cracked or corroded. That does not change what to fit: the marking still says 15 MΩ. A burnt resistor usually means the part it feeds drew too much, so find that before fitting a new one.
On a transistor or diode body (SOT-23, SOT-89, SOT-23-5), 156 is a part code instead. Those parts are listed below.
17 parts are printed 156
Not sure which one you have?
Answer up to 4 quick questions and these 17 parts are ranked, with a meter test that settles it. It works on a dead part too.
KIC7156MSOT-23Voltage supervisor, 3 pins, KECVoltage supervisorSOT-233 pinsKEC
- What it is
- Voltage supervisor
- Maker
- KEC
- Package
- SOT-23
- Pins
- 3
- Details
- CMOS voltage detector, 5.6 V detection
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Integrated circuit.
DTA144VUASOT-323Digital transistor (PNP, resistors built in), 3 pins, ROHMDigital transistor (PNP, resistors built in)SOT-3233 pinsROHM
- What it is
- Digital transistor (PNP, resistors built in)
- Maker
- ROHM
- Package
- SOT-323
- Pins
- 3
- Details
- pnp dtr 47k+10k 50V 100mA
- Source
- Published code list
Is it dead? The meter test is below: Digital transistor.
FSA1156P6SOT-3236 pins, onsemiNot recordedSOT-3236 pinsonsemi
- What it is
- Not recorded
- Maker
- onsemi
- Package
- SOT-323
- Pins
- 6
- Details
- Analog switch
- Source
- Published code list
Is it dead? The meter test is below: This part.
FSA1156P6XSOT-3636 pins, Fairchild SemiconductorNot recordedSOT-3636 pinsFairchild Semiconductor
- What it is
- Not recorded
- Maker
- Fairchild Semiconductor
- Package
- SOT-363
- Pins
- 6
- Details
- CMOS logic IC: Single-pole/single-throw analog switch
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
IXD1415AA56ER-GUSP-6CLDO regulator, 6 pins, IXYSLDO regulatorUSP-6C6 pinsIXYS
- What it is
- LDO regulator
- Maker
- IXYS
- Package
- USP-6C
- Pins
- 6
- Details
- Linear voltage regulator IC: LDO, Dual out, Vout1/Vout2=1.80/2.60V±1%, 200mA, +CE
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
IXD1415AA56MRSOT-23-6LDO regulator, 6 pins, IXYSLDO regulatorSOT-23-66 pinsIXYS
- What it is
- LDO regulator
- Maker
- IXYS
- Package
- SOT-23-6
- Pins
- 6
- Details
- Linear voltage regulator IC: LDO, Dual out, Vout1/Vout2=1.80/2.60V±1%, 200mA, +CE
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
LN3526N1542MSOT-143Voltage supervisor, 4 pins, Shanghai Natlinear ElectronicsVoltage supervisorSOT-1434 pinsShanghai Natlinear Electronics
- What it is
- Voltage supervisor
- Maker
- Shanghai Natlinear Electronics
- Package
- SOT-143
- Pins
- 4
- Details
- Voltage detector IC: 1.5V±2%, -Reset ODO, -MR, 400ms Rt delay
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
XC6102A637MRSOT-23-5Voltage supervisor, 5 pins, TorexVoltage supervisorSOT-23-55 pinsTorex
- What it is
- Voltage supervisor
- Maker
- Torex
- Package
- SOT-23-5
- Pins
- 5
- Details
- CMOS-IC: VDet 3.7V, 5%, Hst, -MR, -Reset ODO, Wt=1.6s, Rt=3.13ms
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
XC6372A561PSOT-89DC-DC converter, 3 pins, TorexDC-DC converterSOT-893 pinsTorex
- What it is
- DC-DC converter
- Maker
- Torex
- Package
- SOT-89
- Pins
- 3
- Details
- DC/DC voltage converter IC: PWM/PFM st-up, 100kHz, 5.6V±2.5%, 100mA
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
XC6372C561PSOT-89-5DC-DC converter, 5 pins, TorexDC-DC converterSOT-89-55 pinsTorex
- What it is
- DC-DC converter
- Maker
- Torex
- Package
- SOT-89-5
- Pins
- 5
- Details
- DC/DC voltage converter IC: PWM/PFM st-up, 100kHz, 5.6V±2.5%, 100mA, +CE
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
XC6415AA56ER-GUSP-6CLDO regulator, 6 pins, TorexLDO regulatorUSP-6C6 pinsTorex
- What it is
- LDO regulator
- Maker
- Torex
- Package
- USP-6C
- Pins
- 6
- Details
- Linear voltage regulator IC: LDO, Dual out, Vout1/Vout2=1.80/2.60V±1%, 200mA, +CE
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
XC6415AA56MRSOT-23-6LDO regulator, 6 pins, TorexLDO regulatorSOT-23-66 pinsTorex
- What it is
- LDO regulator
- Maker
- Torex
- Package
- SOT-23-6
- Pins
- 6
- Details
- Linear voltage regulator IC: LDO, Dual out, Vout1/Vout2=1.80/2.60V±1%, 200mA, +CE
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
3 more parts have no package on record
KIC7156T5Voltage supervisor, KECVoltage supervisorNot recordedNot recordedKEC
- What it is
- Voltage supervisor
- Maker
- KEC
- Package
- Not recorded
- Pins
- Not recorded
- Details
- CMOS voltage detector, 5.6 V detection
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Integrated circuit.
SGM41600SYGBattery charger, 36 pins, SG MicroBattery chargerNot recorded36 pinsSG Micro
- What it is
- Battery charger
- Maker
- SG Micro
- Package
- Not recorded
- Pins
- 36
- Details
- I2C Controlled Single Cell 8A Switched Cap Charger with Bypass Mode
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Integrated circuit.
IXD1415AA567R-GLDO regulator, IXYSLDO regulatorNot recordedNot recordedIXYS
- What it is
- LDO regulator
- Maker
- IXYS
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Linear voltage regulator IC: LDO, Dual out, Vout1/Vout2=1.80/2.60V±1%, 200mA, +CE
- 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.
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.
Digital transistor
Ohms range, part lifted. The datasheet gives the built-in resistors: R1 in series with the base, R2 from base to emitter.
Working, it reads
Base to emitter reads about R1 plus R2 either way round, about 20 kΩ on a 10 k and 10 k part, give or take their wide tolerance. Collector to emitter reads open. A part with no R2 reads a junction behind R1 one way instead.
Dead, it reads
- Collector to emitter the same both ways, near 0 Ω with a continuous beep: shorted.
- From the base, open or far above R1 plus R2: R1 has failed. Static damage shows here most often.
- Base to emitter near 0 Ω: failed short.
- 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:
- The readings depend on the resistor values, so an identical part elsewhere on the board is the surest reference. Measure it the same way.
- Watch for:
- On the diode range a good part with 10 kΩ resistors reads open on every pair, so a good part looks dead there. Use the ohms range.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
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.
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.
Printed with a code easy to misread as 156
One character differs, and it is one that is easy to confuse under a lamp. Each code has a page of its own.
Codes not listed here are printed on 44 more parts.
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