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SMD code P4A

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.

16 parts are printed P4A

Not sure which one you have?

Answer up to 4 quick questions and these 16 parts are ranked, with a meter test that settles it. It works on a dead part too.

  • BGA6489SOT-89RF amplifier (MMIC), 3 pins, NXPRF amplifier (MMIC)SOT-893 pinsNXP
    What it is
    RF amplifier (MMIC)
    Maker
    NXP
    Package
    SOT-89
    Pins
    3
    Details
    MMIC wideband medium power amplifier
    Source
    An older or alternative marking, from a published code list

    Is it dead? The meter test is below: RF amplifier.

    Datasheetfor BGA6489, opens in a new tab
  • ILC5061AIC44XSOT-3233 pins, IMPNot recordedSOT-3233 pinsIMP
    What it is
    Not recorded
    Maker
    IMP
    Package
    SOT-323
    Pins
    3
    Details
    CMOS-IC: Voltage Detector 4.4V±1%, -Reset Open-Drain Output
    Source
    Published code list

    Is it dead? The meter test is below: Integrated circuit.

  • ILC5061AM44XSOT-233 pins, IMPNot recordedSOT-233 pinsIMP
    What it is
    Not recorded
    Maker
    IMP
    Package
    SOT-23
    Pins
    3
    Details
    CMOS-IC: Voltage Detector 4.4V±1%, -Reset Open-Drain Output
    Source
    Published code list

    Is it dead? The meter test is below: Integrated circuit.

  • IXD5108N44AMRSOT-23-5Voltage supervisor, 5 pins, IXYSVoltage supervisorSOT-23-55 pinsIXYS
    What it is
    Voltage supervisor
    Maker
    IXYS
    Package
    SOT-23-5
    Pins
    5
    Details
    Voltage detector IC: 4.4V±2%, Hst, -Reset ODO, Cd
    Source
    Published code list

    Is it dead? The meter test is below: Integrated circuit.

  • IXD5118C34AMR-GSOT-23-5Voltage supervisor, 5 pins, IXYSVoltage supervisorSOT-23-55 pinsIXYS
    What it is
    Voltage supervisor
    Maker
    IXYS
    Package
    SOT-23-5
    Pins
    5
    Details
    Voltage detector IC: 3.4V±2%, ±Reset PPO, Sense, Hst 5%, Cd
    Source
    Published code list

    Is it dead? The meter test is below: Integrated circuit.

  • S-1167B15-M5T1SOT-23-55 pins, ABLICNot recordedSOT-23-55 pinsABLIC
    What it is
    Not recorded
    Maker
    ABLIC
    Package
    SOT-23-5
    Pins
    5
    Details
    equivalent [1.5V LDO]
    Source
    Published code list

    Is it dead? The meter test is below: Voltage regulator.

  • S-1167B15-M5T1GSOT-23-5LDO regulator, 5 pins, Seiko InstrumentsLDO regulatorSOT-23-55 pinsSeiko Instruments
    What it is
    LDO regulator
    Maker
    Seiko Instruments
    Package
    SOT-23-5
    Pins
    5
    Details
    Linear voltage regulator IC: LDO, 1.5V±1.0%, 150mA, +CE
    Source
    Published code list

    Is it dead? The meter test is below: Voltage regulator.

  • XC6108N44AMRSOT-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: Voltage Detector 4,4V, 5%, Hst, -Reset Open drain output
    Source
    Published code list

    Is it dead? The meter test is below: Integrated circuit.

  • XC6118C34AMR-GSOT-23-5Voltage supervisor, 5 pins, TorexVoltage supervisorSOT-23-55 pinsTorex
    What it is
    Voltage supervisor
    Maker
    Torex
    Package
    SOT-23-5
    Pins
    5
    Details
    Voltage detector IC: 3.4V±2%, ±Reset PPO, Sense, Hst 5%, Cd
    Source
    Published code list

    Is it dead? The meter test is below: Integrated circuit.

  • 6 more parts have no package on record
    • IXD5108N44AGRVoltage supervisor, IXYSVoltage supervisorNot recordedNot recordedIXYS
      What it is
      Voltage supervisor
      Maker
      IXYS
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Voltage detector IC: 4.4V±2%, Hst., -Reset ODO, Cd
      Source
      Published code list

      Is it dead? The meter test is below: Integrated circuit.

    • IXD5118C34AGR-GVoltage supervisor, IXYSVoltage supervisorNot recordedNot recordedIXYS
      What it is
      Voltage supervisor
      Maker
      IXYS
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Voltage detector IC: 3.4V±2%, ±Reset PPO, Sense, Hst. 5%, Cd
      Source
      Published code list

      Is it dead? The meter test is below: Integrated circuit.

    • S-1167B15-I6T26 pins, ABLICNot recordedNot recorded6 pinsABLIC
      What it is
      Not recorded
      Maker
      ABLIC
      Package
      Not recorded
      Pins
      6
      Details
      equivalent [1.5V LDO]
      Source
      Published code list

      Is it dead? The meter test is below: Voltage regulator.

    • S-1167B15-I6T2GLDO regulator, Seiko InstrumentsLDO regulatorNot recordedNot recordedSeiko Instruments
      What it is
      LDO regulator
      Maker
      Seiko Instruments
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Linear voltage regulator IC: LDO, 1.5V±1.0%, 150mA, +CE
      Source
      Published code list

      Is it dead? The meter test is below: Voltage regulator.

    • XC6108N44AGRVoltage supervisor, TorexVoltage supervisorNot recordedNot recordedTorex
      What it is
      Voltage supervisor
      Maker
      Torex
      Package
      Not recorded
      Pins
      Not recorded
      Details
      CMOS-IC: Voltage Detector 4,4V5%, Hst, -Reset Open drain output
      Source
      Published code list

      Is it dead? The meter test is below: Integrated circuit.

    • XC6118C34AGR-GVoltage supervisor, TorexVoltage supervisorNot recordedNot recordedTorex
      What it is
      Voltage supervisor
      Maker
      Torex
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Voltage detector IC: 3.4V±2%, ±Reset PPO, Sense, Hst. 5%, Cd
      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.

RF amplifier

Voltage, board powered, on the output pin that the bias resistor or choke feeds.

Working, it reads

The output pin sits at the device voltage the datasheet gives, a few volts, below the supply.

Dead, it reads

  • Output pin at 0 V, or near 0 Ω to ground with the power off: shorted inside.
  • Output pin at the full supply voltage: open inside, no current flowing.
On the board:
Measured on the board with power on; the bias network is part of the reading.
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 figures depend on the part and its bias resistor. 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.

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.

Codes that begin with P4A

For a marking with its end worn or burnt off. Each code has a page of its own.

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