SLRC61003 Schematics design question

bob_zhang — Tue, 12 Jan 2021 02:10:21 GMT

Customer is designing schematics using SLRC61003，there are two questions.

1 Their MCU power supply voltage is 2.5V,so they power VDD,PVDD and TVDD of SLRC61003 with 2.5V.I see the lower limit of these power is 2.5V in datasheet. Are there some potential risks for this design?

2 For TDO,TDI,TMS and TCK pins, If they don't use,how to deal with?Floating or Grounding?I find in demo design TDI,TMS and TCK are gounding and TDO is floating.

I attach the schematic file,please help check.

Re: SLRC61003 Schematics design question

weidong_sun — Tue, 12 Jan 2021 10:15:04 GMT

Hi Bob,

See below, please!

>>1 Their MCU power supply voltage is 2.5V,so they power VDD,PVDD and TVDD of SLRC61003 with 2.5V.I see the lower limit of these power is 2.5V in datasheet. Are there some potential risks for this design?

For SLRC61003HN, min voltage is no problem.

In theory, there is no risk, but TVDD=2.5V, this voltage is relatively low, which will have an impact on the transmit power.

2 For TDO,TDI,TMS and TCK pins, If they don't use,how to deal with?Floating or Grounding?I find in demo design TDI,TMS and TCK are gounding and TDO is floating.

---You can design according to the method of DEMO board.

---In fact, there is no problem with these pins floating.

[Note]

checked your schematic, no other issues were found.

Hope this information is helpful to you.

Have a nice day!

B.R,

Weidong

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SLRC61003 Schematics design question

Re: SLRC61003 Schematics design question