Hi,

i'm looking for a supervisor IC with a watchdog  timer and a threshold 
voltage of 2.25 or 2.20 V.
I could only find the TPS3820-25 but that IC has 15 uA typ. which would 
increase the current consumption 5 - 10 times!
Which other supervisor ICs do consume much less current?

Regards

Rolf F.

Today I got the uP supervisory analog design guide from MAXIM:
MAX6746-MAX6753: 1.6uA, watchdog, monitors 1.8V to 5V fixed or 
adjustable.
Didn't have a closer look at the datasheet.

Wolfgang


--- In msp430@msp4..., "Rolf F." <rolf.freitag@d...> wrote:
> Hi,
> 
> i'm looking for a supervisor IC with a watchdog  timer and a 
threshold 
> voltage of 2.25 or 2.20 V.
> I could only find the TPS3820-25 but that IC has 15 uA typ. which 
would 
> increase the current consumption 5 - 10 times!
> Which other supervisor ICs do consume much less current?
> 
> Regards
> 
> Rolf F.

You could try TI TPS3110K33 1.2uA Supervisor with watchdog.  It's a 
dual supervisor 3.3 and ADJ.  Assuming you have a 3.3V source.
http://focus.ti.com/docs/prod/folders/print/tps3110k33.html

If you could skip the watchdog, by using the internal watchdog on the 
430, TPS3836K2.5 .  200nA the typical threshold is 2.25V also has an 
Input for a switch.  It was designed to work with a 430.
http://focus.ti.com/docs/prod/folders/print/tps3838j25-q1.html


--- In msp430@msp4..., "Rolf F." <rolf.freitag@d...> wrote:
> Hi,
> 
> i'm looking for a supervisor IC with a watchdog  timer and a 
threshold 
> voltage of 2.25 or 2.20 V.
> I could only find the TPS3820-25 but that IC has 15 uA typ. which 
would 
> increase the current consumption 5 - 10 times!
> Which other supervisor ICs do consume much less current?
> 
> Regards
> 
> Rolf F.