TXB0108: TXB0108 connect serial with TXS0108

Duong Nguyen

Prodigy 80 points

Part Number: TXB0108
Other Parts Discussed in Thread: TXU0304, TXU0104, TXU0204

Hi TI team,

I have an application need converter 1.8V<->3.3V<->1.8V

In the first translator we used TXB0108.

I know that TXB0108 need high enough drive strength at the input. So the second translator we can not to use TXB0108

But can we use TXS0108 insted of ?

Thanks and Best Regards,

3 months ago

0 Michael Ikwuyum 3 months ago

TI__Mastermind 25860 points

Hi Duong,

Do you mean you use TXB between 1.8V<->3.3V and asking if you can use TXS for 3.3V<->1.8V?

If so, I presume this is not for a fixed directional application but a auto-bidirectional application. Hence, 1.8V<->3.3V and 3.3V<->1.8V should be the similar i.e 1.8V to and from 3.3V similar to 3.3V to and from 1.8V. Hence, if TXB worked fine for the first translator, you may use for all cases.

Please note further note that TXB VOL can be too high for TXS tighter VIL requirement for the serial connection as described, thanks.

Best Regards,

Michael.

0 Clemens Ladisch 3 months ago

Guru 261460 points

The TXB cannot be used with any other translator (not even another TXB).

It might be possible to use two TXS.

The individual signals of serial lines usually are not bidirectional; in this case, use the TXU0104/TXU0204/TXU0304 instead.

0 Michael Ikwuyum 3 months ago in reply to Clemens Ladisch

TI__Mastermind 25860 points

Michael Ikwuyum said:
Hence, if TXB worked fine for the first translator, you may use for all cases

Note, i.e a single TXB for all translation cases - up/down translations.

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TXB0108: TXB0108 connect serial with TXS0108