SN74ACT240: Enable pin inverse logic

Brian Wang0928

Genius 13260 points

Part Number: SN74ACT240

Is there similar function with SN74ACT240, but /OE pin is inverse logic as below truth table? thanks.

over 4 years ago

0 Clemens Ladisch over 4 years ago

Guru 298540 points

For historical reasons, almost all OE inputs are active low. There is no inverter with active-high OE; such a thing exists only for non-inverting buffers (74xxx126).

0 Brian Wang0928 over 4 years ago in reply to Clemens Ladisch

TI__Genius 13260 points

When OE pin is in floating state, how about the output status? it's in high impedance or not?

0 Clemens Ladisch over 4 years ago in reply to Brian Wang0928

Guru 298540 points

Yes, it is in high impedance, or not. See [FAQ] How does a slow or floating input affect a CMOS device?

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SN74ACT240: Enable pin inverse logic