SN74LVC541A: Is 5V on Vcc ok for part?

Edmond Ng

Part Number: SN74LVC541A
Other Parts Discussed in Thread: SN74AHCT541

Is 5V ok to be applied to pin 20 Vcc of SN74LVC541APWR? The recommended is 3.3V, but I see the max rating is 6.5V. So does that mean 5V Vcc is ok? That means the output will be 5V with input 3.3V when chip OE is enabled,

Thanks

over 2 years ago

+1 Emrys Maier over 2 years ago

TI__Guru* 96591 points

Yes and no. Yes you can have 5V on the supply without damaging the device, but no, you can't have 3V on the input without any issues.

The input needs to be equal to the supply -- this device does not have reduced input thresholds to support a 3V input with a 5V supply. You could use SN74AHCT541.

Also note that, while you can technically operate outside the recommended operating conditions, doing so will mean that TI cannot guarantee performance of the device.

0 Edmond Ng over 2 years ago in reply to Emrys Maier

Prodigy 20 points

Thank you,

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SN74LVC541A: Is 5V on Vcc ok for part?