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ISO6741: spec check

Part Number: ISO6741

Hi

Customers using ISO6741 have a problem as follows, they use 5 iso6741 to connect 5 meters respectively (SPI_CS#(0..4), SPI_CLK, SPI_MOSI, SPI_MISO shared), but when the MCU communicates with the first meter, use the oscilloscope to measure For the signal, the MISO near the meter end is 0, but the MISO on the MCU end cannot be 0. It feels that the other 4 pieces make it not 0, because the EN of the other 4 pieces is grounded. Excuse me

1. Can ISO6741 be applied in this way? Connect 5 SPI devices and then connect to ISO6471 respectively, or is there any other SPI application that connects more than two iso6741s? How can the signal not be affected by other iso6741s?

2. Are there other applications of p2p isolation IC similar to ours? Thank you