SN74LVC1G34: About Input voltage rise and fall slew rates

Tsukui Yusuke

Guru 21930 points

Part Number: SN74LVC1G34
Other Parts Discussed in Thread: SN74LVC1G17

Hi,

Does the SN74LVC1G34 have a slew rate specification for the input signal?
If the rise and fall times are late,
Customers are concerned about unstable output.
Please give your advice on slew rate constraints of the input signal.

Best Regards,
Yusuke

over 6 years ago

0 Clemens Ladisch over 6 years ago

Guru 317450 points

The datasheet specifies Δt/Δv as no more than 10 ns/V. For slower signals, use SN74LVC1G17 instead.

0 Dylan Hubbard over 6 years ago in reply to Clemens Ladisch

TI__Mastermind 46125 points

Hi Tsukui,

To add to what Clemens has stated, please refer to this app note to see the issues the slow input can cause to this device:

http://www.ti.com/lit/an/scba004d/scba004d.pdf

Choosing a device with Schmitt triggers like the one suggested by Clemens will alleviate these issues.

Logic

Logic forum

SN74LVC1G34: About Input voltage rise and fall slew rates