LM2903: Latch Function

Francis Jiang

Part Number: LM2903
Other Parts Discussed in Thread: SN74LVC2G00, SN74LVC1G373

Tool/software:

Hi Team,

Do we have comparator with latch function? Thanks.

BRs,

Francis

+1 Clemens Ladisch 7 months ago

Guru 317280 points

In general, you would add a separate latch (SN74LVC1G373, or an R/S-latch built from a SN74LVC2G00) to a plain comparator.

0 Ron Michallick 7 months ago

Hello Francis,

Do you mean an externally timed latch that holds output state (VOL, VOH) over a certain time period?

Do you mean that output going to a certain state (VOL or VOH) stays that way (until latch is released)?

0 Francis Jiang 6 months ago in reply to Ron Michallick

Hi Ron,

Yes, your understanding is right. Do we have such device? Or SN74LVC1G373/SN74LVC2G00 mentioned by Clemens?

BRs,

Francis

+1 Clemens Ladisch 6 months ago in reply to Francis Jiang

Guru 317280 points

Ron was describing two different types of latches. SN74LVC1G373 is the first, R/S-latch is the second.

+1 Ron Michallick 6 months ago in reply to Francis Jiang

Francis,

If both of my questions are true then, the D-Type Latch, SN74LVC1G373, is good.

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