SN74LVC541A: as a 3.3V TTL 150MHz buffer

Jerry Chen

Part Number: SN74LVC541A
Other Parts Discussed in Thread: SN74LVT244B, SN74AVC16244

Hi,

The bandwidth of SN74LVC541A is not stated in datasheet. In project, we found it can't support a 150MHz 3.3V TTL, as the slew rate is too slow. Could you recommend other multi-channel buffer for this application?

Thanks.

over 7 years ago

0 Dylan Hubbard over 7 years ago

TI__Mastermind 45855 points

Hi Jerry,

150MHz is right at the limit of what the device can do. It is also important at the frequency to have a optimized layout reducing any parasitic capacitance and resistance on the output as this will also limit the operating frequency. I would recommend to try the SN74LVT244B, it has pretty strong output drivers.

0 Jerry Chen over 7 years ago in reply to Dylan Hubbard

TI__Expert 5110 points

Thank you, Dylan.
How about SN74AVC16244? Compared to SN74LVT244B.

0 Dylan Hubbard over 7 years ago in reply to Jerry Chen

TI__Mastermind 45855 points

Hi Jerry,

This one should also manage that frequency. Again, at that high frequency the parasitics will play a big part in the frequency it can reach.

Logic

Logic forum

SN74LVC541A: as a 3.3V TTL 150MHz buffer