SN74LXCH8T245: Data rate in 25C temperature

Carlo

Hello team,

We have a customer interested in the conditions, where VCCI is 1.8V, VCCO is 5V and temperature is 25C. Do you have data rate values (inside red rectangles) available with 25C temperature? Thank you.

Regards,
Carlo

over 4 years ago

0 Clemens Ladisch over 4 years ago

Guru 325520 points

The typical value is measured at 25 °C. But the guaranteed minimum is still 100/50 Mbps.

0 Carlo over 4 years ago in reply to Clemens Ladisch

TI__Expert 7715 points

Hello Clemens,

Thank you for your clarification on the data rate. Does it mean that Down/Up translation parameters don’t mean the direction of pulse edge, but rather the VCCI/VCCO voltage ”direction”?
Regards,
Carlo

0 Clemens Ladisch over 4 years ago in reply to Carlo

Guru 325520 points

Yes, "down" and "up" means the difference of the supply/signal voltages.

0 Carlo over 4 years ago in reply to Clemens Ladisch

TI__Expert 7715 points

The VCCI/VCCO are different than actual pins VCCA/VCCB, so it means that for Down Translation only 50.75 MHz speed rate is guaranteed. What’s the guaranteed speed for Down Translation in 25C temperature? 50 MHz, 75 Mhz, or something between?

0 Clemens Ladisch over 4 years ago in reply to Carlo

Guru 325520 points

When DIR=1, VCCI=VCCA and VCCO=VCCB.
When DIR=0, VCCI=VCCB and VCCO=VCCA.

The guaranteed minimum does not change with temperature.

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SN74LXCH8T245: Data rate in 25C temperature