SN74AVC2T245: Questions of SN74AVC2T245

Jimmy Lai

Part Number: SN74AVC2T245
Other Parts Discussed in Thread: TXU0202

Dear Team,

I would like to ask if it is feasible to use SN74AVC2T245RSWR to convert the UART level in the following circuit? Does the OE pin need to be additionally controlled High or Low? Thank you.

Many Thanks,

Jimmy

5 months ago

0 Clemens Ladisch 5 months ago

Guru 263860 points

This device will work, but the TXU0202 would be easier to use.

While /OE is high, both outputs are disabled. It should be pulled low.

0 Joshua Salinas 5 months ago

TI__Expert 7730 points

Hello Jimmy,

The schematic looks good. We just need to make sure OE pin is pulled low to enable outputs.

If you want to simplify the setup, the TXU0202 can also work. The TXU0202 removes both DIR1 and DIR2 pins.

Regards,

Josh

0 Jimmy Lai 5 months ago in reply to Joshua Salinas

TI__Expert 6845 points

Hi Team,

Thanks for your great support.

In the following situation, I would like to ask you to help confirm whether there will be any problems with the use of item2 below? Thank you.

1. Disconnect A side from HOST, use UART (terminal) on A side to control B side device ---> OK
2. Disconnect A side from HOST and pull-high pin8&9 to 1.8V, use UART (terminal) on B side to control B side device--->NG

Many Thanks,

Jimmy

0 Joshua Salinas 5 months ago in reply to Jimmy Lai

TI__Expert 7730 points

Hello Jimmy,

Can you help me understand what the customer means by "Disconnect A side from HOST, use UART (terminal)"

Regards,

Josh

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SN74AVC2T245: Questions of SN74AVC2T245