TXB0108: QSPI

Yanni Li

Intellectual 1960 points

Part Number: TXB0108

Hi. team

My customer wants to use QSPI with 33MHz through TXB0108, Please tell if this is a suitable device.

And he wants to know: 1. how long does it take to detect the direction of the signal/levelshifter

Thank you.

over 4 years ago

0 Clemens Ladisch over 4 years ago

Guru 318030 points

If V_CCA is at least 2.5 V, this might be possible. See section 8.3 of the datasheet for restrictions. (Long traces, connectors, cables, or resistors are forbidden.)

The direction is never detected; the TXB inputs and outputs are always active in both directions. A TXB pin switches if some external device drives a voltage with higher drive strength the the TXB's output.

0 Yanni Li over 4 years ago in reply to Clemens Ladisch

TI__Intellectual 1960 points

thank you for your answers. he will use 1V8 and 3V3 to shift the signal between those voltage-layers. so this is higher than 2V5 and with very small connection lines. You did not mentioned the time delay between input and output. can you please give an example?

0 Clemens Ladisch over 4 years ago in reply to Yanni Li

Guru 318030 points

As shown in section 6.13 of the datasheet, 33 MHz (= 66 Mbps) is not supported at 1.8 V.

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TXB0108: QSPI