TMUX1574: timing correct?

Hans

Genius 12705 points

Part Number: TMUX1574

Hello Team,

may I kindly ask you to confirm if below timing is correct, please?

Compared to SN74CBT3257PWR transition time is almost 100 times slower and enable time is about 10000 times slower.

Thanks and Best Regards,

Hans

over 1 year ago

0 Clemens Ladisch over 1 year ago

Guru 243180 points

This device does not use transmission gates but single N-channel MOSFETs with a charge pump; see [FAQ] What are the Types of Architectures TI Switches and Multiplexers Use and how do I know which one my device has internally?

A charge pump, especially a small one that can be integrated on the die, will have a much higher output impedance than the V_DD supply, so these values are plausible.

+1 Alex Vish over 1 year ago

TI__Expert 8652 points

Hello Hans,

I have confirmed that the timing specifications in the data sheets are accurate so you are correct in your observation that the SN74CBT3257PWR is much faster than the TMUX1574. Therefore, for applications requiring faster transition times and enable times, I recommend the SN74CBT3257PWR over the TMUX1574. If you are looking for other features, please let me know and I can help recommend a part that fits your needs.

Thanks!

Alex Vish

Switches & multiplexers

Switches & multiplexers forum

TMUX1574: timing correct?