Hello,
I am using a TPS3825-33DBVT to generate a reset to an LM3S9B96 processor and a couple other devices.
Schematic is inserted.
The pin 1 RESET# line is generating a square wave at 2.73Hz, and is not allowing the LM3S to come out of reset.
This square wave will not cease.
There is very little noise on either the MR# or VDD lines, and there is no periodic signal coming in on the MR# line.
Removing the device fixes the problem via pullup resistor R283, as well as replacing the TPS3825 with a similar supervisor from another manufacturer.
Out of 10 boards, one of them did not have this problem and came out of reset right away, however all of the rest show a square wave.
I'd like to understand this problem better before reworking anything or changing my design.
Is there anyone with any insight into this?
Thanks
