SN74AVC1T45: Schematic review

Jimmy Lai

Part Number: SN74AVC1T45
Other Parts Discussed in Thread: SN74AXC1T45, TXU0101, TXU0102

Dear Team,

Could you help to do level shift schematic review?

MPN: SN74AVC1T45

Direction: A->B

IPQ_GPIO27 and IPQ_GPIO28 connect to CPU GPIOs directly.

Many Thanks,

Jimmy

0 Clemens Ladisch over 3 years ago

Guru 324730 points

Looks OK.

Sharing decoupling capacitors is possible if the chips are near each other. In that case, you could just as well use a two-channel level shifter.

The schematic shows 74AVCH1T45, a device with bus-hold input. This is probably not necessary.

The AVC device can be replaced by its more modern AXC version, SN74AXC1T45.

For fixed-direction signals, also consider a fixed-direction translator like the TXU0101/TXU0102 (not P2P).

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