LSF0102: can LSF0102 be used for SPI interface?

pragash sangaran78

Part Number: LSF0102
Other Parts Discussed in Thread: LSF0108, , SN74AVC2T245, SN74AXC4T774

I'm currently using LSF0102 for my SPI interface to level shift the voltage from/to 3.3V to/from 1.8V. but the datasheet says it's only recommended for i2C and UART even when the speed of the level shifter can go up to 100MHz. For SPI, only LSF0108 is recommended. Why is it so? I have given a portion of LSF0102 datasheet below.

over 5 years ago

0 Clemens Ladisch over 5 years ago

Guru 316670 points

Many SPI implementations use more than two signals. If you have only two, the LSF0102 will work (but the SN74AVC2T245 would be a better idea because it has proper buffers and does not need pull-up resistors).

0 pragash sangaran78 over 5 years ago in reply to Clemens Ladisch

Genius 3510 points

i have 4 SPI lines and implementing 2 LSF0102. will it work? if no, please explain why? thanks.

0 Clemens Ladisch over 5 years ago in reply to pragash sangaran78

Guru 316670 points

Two LSF0102‍s wil work, as long as there are no pull-down resistors. But for four SPI lines, the best solution would be a single SN74AXC4T774.

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LSF0102: can LSF0102 be used for SPI interface?