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SMD code 8R in DFN

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.

1 part in DFN is printed 8R

Not sure which one you have?

Answer up to 4 quick questions and these 15 parts are ranked, with a meter test that settles it. It works on a dead part too.

  • RP103K331DDFNLDO regulator, RicohLDO regulatorNot recordedRicoh
    What it is
    LDO regulator
    Maker
    Ricoh
    Package
    DFN
    Pins
    Not recorded
    Details
    Linear voltage regulator IC: LDO, 3.3V±1%, 150mA, +CE, CL
    Source
    Published code list

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

  • 14 more parts have no package on record. Nothing rules them out, so they stay.
    • TCK22974GLoad switch, ToshibaLoad switchNot recordedToshiba
      What it is
      Load switch
      Maker
      Toshiba
      Package
      Not recorded
      Pins
      Not recorded
      Details
      2A, 25m Ω Load Switch IC with Slew Rate Control Driver
      Source
      Manufacturer datasheet

      Is it dead? The meter test is below: Load switch.

      Datasheetfor TCK22974G, opens in a new tab
    • ADP151ACBZ-1.1-R74 pins, Analog DevicesNot recorded4 pinsAnalog Devices
      What it is
      Not recorded
      Maker
      Analog Devices
      Package
      Not recorded
      Pins
      4
      Details
      equivalent [1.1V LDO]
      Source
      Published code list

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

    • AP7343D-185FS4-7BLDO regulator, Diodes IncorporatedLDO regulatorNot recordedDiodes Incorporated
      What it is
      LDO regulator
      Maker
      Diodes Incorporated
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Linear voltage regulator IC: LDO, 1.85V±1%, 300mA, +CE, CL
      Source
      Published code list

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

    • IXD5127C39DNRVoltage supervisor, IXYSVoltage supervisorNot recordedIXYS
      What it is
      Voltage supervisor
      Maker
      IXYS
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Voltage detector IC: 3.9V±0.8%, -Reset PPO, -MR, 400ms Rt delay
      Source
      Published code list

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

    • IXD5127N39JNRVoltage supervisor, IXYSVoltage supervisorNot recordedIXYS
      What it is
      Voltage supervisor
      Maker
      IXYS
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Voltage detector IC: 3.9V±0.8%, +Reset ODO, -MR, 400ms Rt delay
      Source
      Published code list

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

    • XC6127C39DNRVoltage supervisor, TorexVoltage supervisorNot recordedTorex
      What it is
      Voltage supervisor
      Maker
      Torex
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Voltage detector IC: 3.9V±0.8%, -Reset PPO, -MR, Rdt=400ms
      Source
      Published code list

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

    • XC6127N39JNRVoltage supervisor, TorexVoltage supervisorNot recordedTorex
      What it is
      Voltage supervisor
      Maker
      Torex
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Voltage detector IC: 3.9V±0.8%, +Reset ODO, -MR, Rdt=400ms
      Source
      Published code list

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

    • XC6129C39J9R-GVoltage supervisor, TorexVoltage supervisorNot recordedTorex
      What it is
      Voltage supervisor
      Maker
      Torex
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Voltage detector IC: 3.9V±0.8%, +Reset PPO, Detect Delay
      Source
      Published code list

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

    • XC6129C39JNR-GVoltage supervisor, TorexVoltage supervisorNot recordedTorex
      What it is
      Voltage supervisor
      Maker
      Torex
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Voltage detector IC: 3.9V±0.8%, +Reset PPO, Detect Delay
      Source
      Published code list

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

    • XC6129N39J9R-GVoltage supervisor, TorexVoltage supervisorNot recordedTorex
      What it is
      Voltage supervisor
      Maker
      Torex
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Voltage detector IC: 3.9V±0.8%, +Reset ODO, Detect Delay
      Source
      Published code list

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

    • XC6129N39JNR-GVoltage supervisor, TorexVoltage supervisorNot recordedTorex
      What it is
      Voltage supervisor
      Maker
      Torex
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Voltage detector IC: 3.9V±0.8%, +Reset ODO, Detect Delay
      Source
      Published code list

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

    • XC6223A32B9R-GLDO regulator, TorexLDO regulatorNot recordedTorex
      What it is
      LDO regulator
      Maker
      Torex
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Linear voltage regulator IC: LDO, 3.25V±1%, 300mA, +CE
      Source
      Published code list

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

    • XC6223A32BNR-GLDO regulator, TorexLDO regulatorNot recordedTorex
      What it is
      LDO regulator
      Maker
      Torex
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Linear voltage regulator IC: LDO, 3.25V±1%, 300mA, +CE
      Source
      Published code list

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

    • XC6501A481NR-GLDO regulator, TorexLDO regulatorNot recordedTorex
      What it is
      LDO regulator
      Maker
      Torex
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Linear voltage regulator IC: LDO, 4.8V±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.

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.

Load switch

Voltage, board powered, black probe on ground.

Working, it reads

Switched on, the output pin sits at the input voltage. Switched off, it sits near 0 V.

Dead, it reads

  • Output at the input voltage while switched off: the pass element has shorted.
  • Input present and switched on, no output: failed open, or shut down into a shorted load. Power off and measure output to ground.
On the board:
An output near 0 Ω to ground is usually the load. Lift the output pin to see which.
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 pinout and whether the enable is active high or low differ between parts. 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.

Printed with a code easy to misread as 8R

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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