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SMD code BAM in SMB

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 SMB is printed BAM

Not sure which one you have?

Answer up to 4 quick questions and these 11 parts are ranked, with a meter test that settles it. It works on a dead part too.

  • SMBJ7.0ASMBTVS diode, High diode SemiconductorTVS diodeHigh diode Semiconductor
    What it is
    TVS diode
    Maker
    High diode Semiconductor
    Package
    SMB
    Pins
    2
    Source
    Published code list

    Is it dead? The meter test is below: TVS or ESD protection diode.

    Datasheetfor SMBJ7.0A, opens in a new tab
  • 10 more parts have no package on record. Nothing rules them out, so they stay.
    • NCP347MTAFLoad switch, onsemiLoad switchonsemi
      What it is
      Load switch
      Maker
      onsemi
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Positive Overvoltage Protection Controller with Internal Low R NMOS FET and Status FLAG
      Source
      Manufacturer datasheet

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

      Datasheetfor NCP347MTAF, opens in a new tab
    • AME8500AEETBD18LAMENot recordedAME
      What it is
      Not recorded
      Maker
      AME
      Package
      Not recorded
      Pins
      Not recorded
      Details
      CMOS-IC: Voltage Detector 1.80V, -Reset Open drain output, 30ms
      Source
      Published code list

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

    • AME8500AEETBD18YAMENot recordedAME
      What it is
      Not recorded
      Maker
      AME
      Package
      Not recorded
      Pins
      Not recorded
      Details
      CMOS-IC: Voltage Detector 1.80V, -Reset Open drain output, 30ms
      Source
      Published code list

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

    • IXD3237F0MC0R-GDC-DC converter, IXYSDC-DC converterIXYS
      What it is
      DC-DC converter
      Maker
      IXYS
      Package
      Not recorded
      Pins
      Not recorded
      Details
      DC/DC voltage converter IC: PWM-PWM/PFM, st-dwn, 0.95V±2%, 600mA, 1.2MHz, Vin>1.8V, HSST, CL
      Source
      Published code list

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

    • IXD3237F0MC4R-GDC-DC converter, IXYSDC-DC converterIXYS
      What it is
      DC-DC converter
      Maker
      IXYS
      Package
      Not recorded
      Pins
      Not recorded
      Details
      DC/DC voltage converter IC: PWM-PWM/PFM, st-dwn, 0.95V±2%, 600mA, 1.2MHz, Vin>1.8V, HSST, CL
      Source
      Published code list

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

    • IXD9214B0M3DRDC-DC converter, ZilogDC-DC converterZilog
      What it is
      DC-DC converter
      Maker
      Zilog
      Package
      Not recorded
      Pins
      Not recorded
      Details
      DC/DC voltage converter IC: PWM/PFM st-dwn, 3.0MHz, 0.95V±2%, 1.5A, +CE
      Source
      Published code list

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

    • XC6241B16BNR-GLDO regulator, TorexLDO regulatorTorex
      What it is
      LDO regulator
      Maker
      Torex
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Linear voltage regulator IC: LDO, 1.65V±20mV, 150mA, +CE
      Source
      Published code list

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

    • XC9237F0MC0R-GDC-DC converter, TorexDC-DC converterTorex
      What it is
      DC-DC converter
      Maker
      Torex
      Package
      Not recorded
      Pins
      Not recorded
      Details
      DC/DC voltage converter IC: PWM-PWM/PFM, st-dwn, 0.95V±2%, 600mA, 1.2MHz, Vin>1.8V, HSST, CL
      Source
      Published code list

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

    • XC9237F0MC4R-GDC-DC converter, TorexDC-DC converterTorex
      What it is
      DC-DC converter
      Maker
      Torex
      Package
      Not recorded
      Pins
      Not recorded
      Details
      DC/DC voltage converter IC: PWM-PWM/PFM, st-dwn, 0.95V±2%, 600mA, 1.2MHz, Vin>1.8V, HSST, CL
      Source
      Published code list

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

    • XCL214B0M3DRDC-DC converter, TorexDC-DC converterTorex
      What it is
      DC-DC converter
      Maker
      Torex
      Package
      Not recorded
      Pins
      Not recorded
      Details
      DC/DC voltage converter IC: PWM/PFM st-dwn, 3.0MHz, 0.95V±2%, 1.5A, +CE
      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.

TVS or ESD protection diode

Diode range, from the protected line to ground, part lifted if you can.

Working, it reads

A one-way part reads about 0.6 to 0.8 V forward and open in reverse. A two-way part reads open both ways. Arrays with several lines read as the datasheet's diagram draws them.

Dead, it reads

  • From the line to ground, the same reading both ways, near 0 V with a continuous beep: shorted.
  • A reading both ways on a one-way part: leaky.
  • A one-way part open both ways: failed open.
On the board
, a line reading shorted to ground can be this part or anything else on that line. Lift it: if the short goes with it, it has failed.
Compare:
The same part on the next line or connector pin is the healthy reading to compare with.
Watch for:
A two-way part reads open both ways when it is good, exactly like one that has failed open. The meter cannot tell them apart; an identical part on the next line can.

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.

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.

Printed with a code easy to misread as BAM

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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