SN74LVC244A: sn74lvc244a input signal slew rate limit

Frank Xiao

Genius 12055 points

Part Number: SN74LVC244A
Other Parts Discussed in Thread: SN74LVC125A, SN74LVC162244A, SN74LVC245A

Hi team,

My customer wants to use the sn74lvc244a in the system, but we are not sure whether it has input signal slew rate limit(min). May need your help. Thanks.

over 3 years ago

0 Clemens Ladisch over 3 years ago

Guru 243220 points

All LVC devices (without Schmitt-trigger inputs) have such a limit; omitting it is an error in the datasheet.

Other LVC devices have 8 ns/V (SN74LVC125A) or 10 ns/V (SN74LVC162244A).

0 Frank Xiao over 3 years ago in reply to Clemens Ladisch

TI__Genius 12055 points

Hi Clemens,

So for the SN74LVC244A what's the requirement? 8 ns/V? Thanks.

0 Clemens Ladisch over 3 years ago in reply to Frank Xiao

Guru 243220 points

I do not know. To be safe, assume 8 ns/V.

0 Emrys Maier over 3 years ago in reply to Frank Xiao

TI__Guru* 96591 points

Hey Frank,

I will mark this as an errata to fix in the datasheet.

Please use 10 ns/V, which is the same value provided in the SN74LVC245A datasheet:

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SN74LVC244A: sn74lvc244a input signal slew rate limit