LSF0108: For SPI MISO/MOSI level tanslation

Stefano Moscato1

Part Number: LSF0108

We have to drive four SPI devices at 1.8V with a microcontroller that has only one SPI and is powered by 5V.

We would like to use the LSF0108RKS translator as shown in the figure.

We would like to know if you think there are any problems in the translator if we short circuit all signals MISO as shown in the figure (red lines).

over 1 year ago

0 Clemens Ladisch over 1 year ago

Guru 317480 points

This is possible.

But you could also merge the signals on the 1.8 V side, with only one translator channel used.

0 Jack Guan over 1 year ago

TI__Mastermind 41266 points

Hey Stefano,

In addition to Clemens' response, please ensure that the logic of the output signals from the SPI devices are all same to prevent corrupted signals at the input of the MCU side as well.

Regards,

Jack

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LSF0108: For SPI MISO/MOSI level tanslation