AM26LS32AC: output logic in 3.3v problem

Lins Thankachan

Part Number: AM26LS32AC
Other Parts Discussed in Thread: AM26LV32

Tool/software:

For AM26LS32AC the Vcc is 5v but i needed 3.3v logic output. is it enough to just add a pullup of 3.3v on the output logic? or do i need to give a 5v to 3.3v logic level converter?

over 1 year ago

0 Clemens Ladisch over 1 year ago

Guru 320330 points

The AM26LS32AC outputs TTL signals, which have a high level that is near 3.3 V.

Anyway, just use the AM26LV32(E).

0 Ethan Sempsrott over 1 year ago

TI__Mastermind 19202 points

Hi Lins,

The easiest solution would be to use a device that is supplied by 3.3V such as the AM26LV32 ("E" version has included ESD protection). This will ensure the output does not exceed 3.3V.

However if you use a 5V supplied device like the AM26LS32AC, a level translator from 5V to 3.3V should be added to the outputs. They can be found here.

Best,

Ethan

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AM26LS32AC: output logic in 3.3v problem