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SMD code J7 in SOT-323

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.

4 parts in SOT-323 are printed J7

Not sure which one you have?

Answer up to 4 quick questions and these 21 parts are ranked, with a meter test that settles it. It works on a dead part too.

  • AP8821N-17GTSOT-323Voltage supervisor, 3 pins, Anwell SemiconductorVoltage supervisor3 pinsAnwell Semiconductor
    What it is
    Voltage supervisor
    Maker
    Anwell Semiconductor
    Package
    SOT-323
    Pins
    3
    Details
    Voltage detector IC: 1.7V±2%, -Reset ODO, H-free
    Source
    Published code list

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

  • AP8821N-17PTSOT-323Voltage supervisor, 3 pins, Anwell SemiconductorVoltage supervisor3 pinsAnwell Semiconductor
    What it is
    Voltage supervisor
    Maker
    Anwell Semiconductor
    Package
    SOT-323
    Pins
    3
    Details
    Voltage detector IC: 1.7V±2%, -Reset ODO
    Source
    Published code list

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

  • EC95808N17C1NSOT-323Voltage supervisor, 3 pins, E-CMOSVoltage supervisor3 pinsE-CMOS
    What it is
    Voltage supervisor
    Maker
    E-CMOS
    Package
    SOT-323
    Pins
    3
    Details
    Voltage detector IC: 1.7V±2%, -Reset ODO
    Source
    Published code list

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

  • TCM809ZELBSOT-323Voltage supervisor, 3 pins, MicrochipVoltage supervisor3 pinsMicrochip
    What it is
    Voltage supervisor
    Maker
    Microchip
    Package
    SOT-323
    Pins
    3
    Details
    Voltage detector IC: 2.32V±2%, -Reset PPO
    Source
    Published code list

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

  • 11 more parts have no package on record. Nothing rules them out, so they stay.
    • FAN48630UC45XDC-DC converter, onsemiDC-DC converterNot recordedonsemi
      What it is
      DC-DC converter
      Maker
      onsemi
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Synchronous Regulator with Bypass Mode, , TINYBOOST 2.5 MHz, 1500 mA
      Source
      Manufacturer datasheet

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

      Datasheetfor FAN48630UC45X, opens in a new tab
    • 2SK3230J73 pins, RenesasNot recorded3 pinsRenesas
      What it is
      Not recorded
      Maker
      Renesas
      Package
      Not recorded
      Pins
      3
      Source
      Published code list

      Is it dead? The meter test is below: This part.

    • 2SK3653J73 pins, RenesasNot recorded3 pinsRenesas
      What it is
      Not recorded
      Maker
      Renesas
      Package
      Not recorded
      Pins
      3
      Source
      Published code list

      Is it dead? The meter test is below: This part.

    • 74LVC1G3157FZ4Diodes IncorporatedNot recordedNot recordedDiodes Incorporated
      What it is
      Not recorded
      Maker
      Diodes Incorporated
      Package
      Not recorded
      Pins
      Not recorded
      Details
      CMOS logic IC: 2-channel analog multiplexer/demultiplexer
      Source
      Published code list

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

    • AD8315ACP-REEL8 pins, Analog DevicesNot recorded8 pinsAnalog Devices
      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.

    • AP8821N-17GIVoltage supervisor, Anwell SemiconductorVoltage supervisorNot recordedAnwell Semiconductor
      What it is
      Voltage supervisor
      Maker
      Anwell Semiconductor
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Voltage detector IC: 1.7V±2%, -Reset ODO, H-free
      Source
      Published code list

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

    • AP8821N-17GSVoltage supervisor, Anwell SemiconductorVoltage supervisorNot recordedAnwell Semiconductor
      What it is
      Voltage supervisor
      Maker
      Anwell Semiconductor
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Voltage detector IC: 1.7V±2%, -Reset ODO, H-free
      Source
      Published code list

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

    • AP8821N-17PIVoltage supervisor, Anwell SemiconductorVoltage supervisorNot recordedAnwell Semiconductor
      What it is
      Voltage supervisor
      Maker
      Anwell Semiconductor
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Voltage detector IC: 1.7V±2%, -Reset ODO
      Source
      Published code list

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

    • AP8821N-17PSVoltage supervisor, Anwell SemiconductorVoltage supervisorNot recordedAnwell Semiconductor
      What it is
      Voltage supervisor
      Maker
      Anwell Semiconductor
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Voltage detector IC: 1.7V±2%, -Reset ODO
      Source
      Published code list

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

    • DRC9A43EDigital transistor (NPN, resistors built in), PanasonicDigital transistor (NPN, resistors built in)Not recordedPanasonic
      What it is
      Digital transistor (NPN, resistors built in)
      Maker
      Panasonic
      Package
      Not recorded
      Pins
      Not recorded
      Details
      NPN transistor: Sw, 50V, 80mA, 125mW, R1/R2=4.7k/4.7k
      Source
      Published code list

      Is it dead? The meter test is below: Digital transistor.

    • EC95808N17C7IVoltage supervisor, E-CMOSVoltage supervisorNot recordedE-CMOS
      What it is
      Voltage supervisor
      Maker
      E-CMOS
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Voltage detector IC: 1.7V±2%, -Reset ODO
      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.

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.

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.

Printed with a code easy to misread as J7

One character differs, and it is one that is easy to confuse under a lamp. Each code has a page of its own.

Codes that begin with J7

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

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