SMD code SNB
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.
6 parts are printed SNB
Not sure which one you have?
Answer up to 4 quick questions and these 6 parts are ranked, with a meter test that settles it. It works on a dead part too.
MCP810M3-4.63SOT-23Voltage supervisor, 3 pins, National SemiconductorVoltage supervisorSOT-233 pinsNational Semiconductor
- What it is
- Voltage supervisor
- Maker
- National Semiconductor
- Package
- SOT-23
- Pins
- 3
- Details
- Voltage detector IC: 4.63V±1.5%, +Reset PPO
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
NCP301LSN33T1SOT-23-5Voltage supervisor, 5 pins, onsemiVoltage supervisorSOT-23-55 pinsonsemi
- What it is
- Voltage supervisor
- Maker
- onsemi
- Package
- SOT-23-5
- Pins
- 5
- Details
- CMOS-IC: Voltage Detector 3,3V, -Reset Open drain output
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
XC9148K29CER-GUSP-6CDC-DC converter, 6 pins, TorexDC-DC converterUSP-6C6 pinsTorex
- What it is
- DC-DC converter
- Maker
- Torex
- Package
- USP-6C
- Pins
- 6
- Details
- DC/DC voltage converter IC: PWM/PFM st-up, 1.2MHz, 2.9V±2%, 1.4A, ULVO, CrLL, ShPr, I-O-Bps, +CE
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
XC9148K29CPR-GSOT-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 step-up, 1.2MHz, 2.9V±2%, 1.4A, ULVO, CrLL, ShPr, I-O-Bps, +CE
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
2 more parts have no package on record
MIC2289-24BMLMicrelNot recordedNot recordedNot recordedMicrel
- What it is
- Not recorded
- Maker
- Micrel
- Package
- Not recorded
- Pins
- Not recorded
- Details
- VR-IC: 1,2 MHz PWM White LED Driver, OVP 24V
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
MIC2289-24YMLLED driver, MicrelLED driverNot recordedNot recordedMicrel
- What it is
- LED driver
- Maker
- Micrel
- Package
- Not recorded
- Pins
- Not recorded
- Details
- LED driver IC: 1.2 MHz PWM White LED driver, OVP 24V, Pb-Free
- 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.
Printed with a code easy to misread as SNB
One character differs, and it is one that is easy to confuse under a lamp. Each code has a page of its own.
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