Hi I have an issue with CY62128ELL-45XSI and standby power draw.
I had a bad RAM IC, CY62128BLL-70SC (U9) and replaced IAW Cypress suggested alternates, the above IC, however the standby current draw of this replacement is ~200 micro Amps (@3.0V VBATT), not around the original ~10 micro amps (as measured against another unit). Battery current is critical to keeping SRAM data retention so this is too high. I found VBATT dropped rapidly from 3.0V to 2.72V (with the -45XSI) and stabilized. Current draw also decreased rapidly from 200 micro Amps and is now ~30 micro Amps @2.72V VBATT.
I replaced the IC again and found exactly the same current draw and same VBATT drop.
I measured /CE and found it at 1.22V yet the IC is not attaining low power standby. Looks as if the replacement -45XSI IC is not attaining standby without lowering VBATT.
Other components are OK, replaced, and I draw measured with SRAM out~ 3micro Amps.
Any ideas...pulling my hair out here!
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