SMD code ATs
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.
The last letter, s, is lower case, which on NXP and Philips parts is a date or factory code, so it was set aside and AT was searched.
199 parts are printed ATs
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.
MAX812MSOT-1434 pins, Analog DevicesNot recordedSOT-1434 pinsAnalog Devices
- What it is
- Not recorded
- Maker
- Analog Devices
- Package
- SOT-143
- Pins
- 4
- Details
- CMOS-IC: Voltage Detector 4,38V, MR, Reset Open drain output, 140ms
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
MAX812MUSSOT-1434 pins, Analog DevicesNot recordedSOT-1434 pinsAnalog Devices
- What it is
- Not recorded
- Maker
- Analog Devices
- Package
- SOT-143
- Pins
- 4
- Details
- CMOS-IC: Voltage Detector 4,38V, MR, Reset Push-pull output, 140ms
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
MAX825MEUKSOT-23-55 pins, Analog DevicesNot recordedSOT-23-55 pinsAnalog Devices
- What it is
- Not recorded
- Maker
- Analog Devices
- Package
- SOT-23-5
- Pins
- 5
- Details
- CMOS-IC: Voltage Detector 4,38V, MR, ±Reset Push-pull output
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
MAX8891EXK33+TSOT-353LDO regulator, 5 pins, Maxim Integrated ProductsLDO regulatorSOT-3535 pinsMaxim Integrated Products
- What it is
- LDO regulator
- Maker
- Maxim Integrated Products
- Package
- SOT-353
- Pins
- 5
- Details
- Linear voltage regulator IC: LDO, 3.3V±3%, 200mA, +CE
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
MAX16057ATT26+DFNVoltage supervisor, Maxim Integrated ProductsVoltage supervisorDFNNot recordedMaxim Integrated Products
- What it is
- Voltage supervisor
- Maker
- Maxim Integrated Products
- Package
- DFN
- Pins
- Not recorded
- Details
- Voltage detector IC: 2.6V±2%, -MR, -Reset PPO
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
MIC803-46D3VC3SOT-323Voltage supervisor, 3 pins, MicrelVoltage supervisorSOT-3233 pinsMicrel
- What it is
- Voltage supervisor
- Maker
- Micrel
- Package
- SOT-323
- Pins
- 3
- Details
- Microprocessor reset circuit
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
MIC803-46D3VM3SOT-233 pins, MicrelNot recordedSOT-233 pinsMicrel
- What it is
- Not recorded
- Maker
- Micrel
- Package
- SOT-23
- Pins
- 3
- Details
- Microprocessor reset circuit
- Source
- Published code list
Is it dead? The meter test is below: This part.
NL17SG08DFT2GSOT-23-55 pins, onsemiNot recordedSOT-23-55 pinsonsemi
- What it is
- Not recorded
- Maker
- onsemi
- Package
- SOT-23-5
- Pins
- 5
- Source
- Published code list
Is it dead? The meter test is below: This part.
NL17SG86DFT2GSOT-23-55 pins, onsemiNot recordedSOT-23-55 pinsonsemi
- What it is
- Not recorded
- Maker
- onsemi
- Package
- SOT-23-5
- Pins
- 5
- Source
- Published code list
Is it dead? The meter test is below: This part.
6 more parts have no package on record
IXD5127C43FNRVoltage supervisor, IXYSVoltage supervisorNot recordedNot recordedIXYS
- What it is
- Voltage supervisor
- Maker
- IXYS
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Voltage detector IC: 4.3V±0.8%, +Reset PPO, -MR, 50ms Rt delay
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
IXD5127N44ANRVoltage supervisor, IXYSVoltage supervisorNot recordedNot recordedIXYS
- What it is
- Voltage supervisor
- Maker
- IXYS
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Voltage detector IC: 4.4V±0.8%, -Reset ODO, -MR, 50ms Rt delay
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
KB4312A-GRELED driver, KingborLED driverNot recordedNot recordedKingbor
- What it is
- LED driver
- Maker
- Kingbor
- Package
- Not recorded
- Pins
- Not recorded
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
NC7SV11LFairchild SemiconductorNot recordedNot recordedNot recordedFairchild Semiconductor
- What it is
- Not recorded
- Maker
- Fairchild Semiconductor
- Package
- Not recorded
- Pins
- Not recorded
- Details
- CMOS logic IC: 3-input AND gate
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
NLX2G32AMXonsemiNot recordedNot recordedNot recordedonsemi
- What it is
- Not recorded
- Maker
- onsemi
- Package
- Not recorded
- Pins
- Not recorded
- Details
- CMOS logic IC: Dual 2-input OR gate
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
NLX2G32BMXonsemiNot recordedNot recordedNot recordedonsemi
- What it is
- Not recorded
- Maker
- onsemi
- Package
- Not recorded
- Pins
- Not recorded
- Details
- CMOS logic IC: Dual 2-input OR gate
- 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.
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.
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