SN74AVC8T245: power up/down sequence

Kazuhiko Hirano

Genius 15088 points

Part Number: SN74AVC8T245

Hello,

My customer uses SN74AVC8T245PW as follows.

Case #1

OE and DIR are connected to GND (Data direction is always B to A)

Vcca=1.8V

Vccb=3.3V

Case #2

OE and DIR are connected to GND (Data direction is always B to A)

Vcca=3.3.V

Vccb=1.8V

For those two cases, are there any power up/down sequence they have to follow?

Or Vcca and Vccb power up/down could be any orders?

Best regards,

K.Hirano

0 Dylan Hubbard over 4 years ago

Hi K.Hirano,

I would recommend using the newer SN74AXC8T245PWR. Its drop in compatible and has robust power up with no requirements for power sequencing.

0 Kazuhiko Hirano over 4 years ago

Dylan,

Thank you for your response.

Let me confirm one more.

What live-insertion level does SN74AXC8T245PWR have, level 0, level 1, level 2 or level3?

Though SN74AVC8T245 is level 1.

Best regards,

K.Hirano

0 Dylan Hubbard over 4 years ago in reply to Kazuhiko Hirano

Hey K.Hirano,

This device also supports Level 1 with its Ioff feature.

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