TCAN2451-Q1: schematic review

Hi Ivy,

I have a few comments on the schematic. 

1. Make sure that the 0.1uF capacitors on VSUP, VSUPB, and VHSS are all as close to the pin as possible - it only looks like there are 2 so I'd add a 3rd 0.1uF cap (one for each power pin)

2.  For the VCC2 to VCAN connection I'd add one more 0.1uF capacitor so that each pin has its own 0.1uF cap and these should be as close as possible to the pin. 

3. There are a lot of small value capacitors on the SPI lines and CTXD lines - customer can keep them as pads - but I wouldn't necessarily install them unless they are absolutely needed after testing as we don't require these caps on these lines and it isn't super common. I don' think they should cause too much issue but I don't think they are needed in most cases so I would keep them DNI unless testing proves them necessary and as long as they have pads they wouldn't have to redesign to install them at a later date. 

4. How is customer calculating the buck converters inductance? For 5V outputs (VSEL is connected to GND) We suggest 4.7uH and customer is doubling it - so our suggestion is 4.7uH

Those are my main concerns/comments - but if you could respond to point 4 I'd appreciate it!

Best,

Parker Dodson