Vcc x Vbat external SRAM switching

[Ricardo_RauppV]

I need to keep my data in SRAM stored when Vcc goes down/up, by backuping the SRAM by a CR2032.

Is there some reasonable price  solution for this?like a ASIC device?

In the past I had some problem due to this switching...that time the asics costed almost the  RAM price!!...

Thanks

Ricardo Raupp

[taigbr]

Hi Ricardo,
did you take a look at the ds1210 from maxim?
Regards, Georg



Message Edited by taigbr on 2008-09-30 11:39 AM

[Ricardo_RauppV]

Georg

I took a look at DS1210 .It seems to be nice.

The Freescale support team mentioned  TI TPS3606-33, wich is almost 50% less then DS1210.

I will evaluate them better....

Thanks for your attention.

Ricardo Raupp