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SN74LVC2G125: Questions of SN74LVC2G125

Part Number: SN74LVC2G125
Other Parts Discussed in Thread: SN74LV1T125, SN74AHCT1G125

Dear Team,

I have a question about SN74LVC2G125:
OE is L, VCC=5V, when the A port is 3.3V high level, is the Y port a 5V high level?

Many Thanks,

Jimmy

  • The minimum guaranteed VIH is 3.5 V. So this is not guaranteed to work.

    Use a device with TTL-compatible inputs like the SN74AHCT1G125, or a level shifter like the SN74LV1T125.

  • Hi Jimmy,

    No. At VCC = 5V, the VIH min is 0.7*VCC = 3.5V. A is in between the VIH min and VIL max and can potentially damage the device; the Y port MIGHT register as a logic high but this performance is dubious and not guaranteed.

    Best,

    Malcolm