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SMD marking

C74in SSOP

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.

The only part printed C74 in this package in our tables

SN74LVC2G74DCT

What it is
Flip-flop
Maker
Texas Instruments
Package
SSOP
Pins
8
Details
Single Positive-Edge-Triggered D-Type Flip-Flop With Clear and Preset
Source
From the manufacturer's datasheet

Is it dead?

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.

Datasheetfor SN74LVC2G74DCT, opens in a new tab
1 more part has a code that begins with C74

Codes that begin with C74

For a marking with its end worn or burnt off. Each one shows its full printed code.

  • SN74LVC2G74DCUprinted C74QFlip-flop, 8 pins, Texas Instruments

    Printed C74Q. Only the start matches what you typed, so this fits only if the rest of the marking is worn off.

    What it is
    Flip-flop
    Maker
    Texas Instruments
    Package
    Not recorded
    Pins
    8
    Details
    Single Positive-Edge-Triggered D-Type Flip-Flop With Clear and Preset
    Source
    From the manufacturer's datasheet

    Is it dead?

    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.

    Datasheetfor SN74LVC2G74DCU, opens in a new tab

Open this in the search to correct a character or try another package.