Hi team,
For slow rising time issue like below figure when using TS5A22362 for SPI interface, can you give some analysis and the workaround for customer? Is there a part that will work better for this application.
Schematic: TS5A22362 x 2ea (for 4lines)
Waveform : CLK / Data
Without TS5A22362 to verify SPI interface -> It works for SPI interface
Thanks,
Sam Lee
Hi Sam,
Thank you for providing a scope shot. You mentioned the device is being used for SPI interface. What frequency is the SPI operating at? This switch is rated for a BW of 17.5MHz at 3.3V supply. Can you provide me with more information on VDD, input voltages (assuming 3.3V from scope capture), etc?
One quick way to if the switch is causing issues or if it is a system issue is to remove the device and short the pins together on the board. This will allow you to run tests with the device removed but the system still configured to pass through your signals. Try this to see if your slow rise time is still and issue.
The issue I see with using this device is that it is audio device that is optimized for linearity not necessarily for fast rising SPI signals. The input capacitance of this switch is around 370pF. High line capacitance can cause slow signal rise times. 
I have linked here another E2E post which talks about an SPI recommendation. 
The TS3A44159 may be a better suited device for you application since you are using two dual-SPDT devices. The TS3A44159 is a quad SPDT device which can do the same as your two other devices.
