Hi.
Quote:
Is the 32kx8 SRAM from a dead HP48 or HP38 a satisfactory device or is the current consumption prohibitive?
It depends, however, I might think, if it's low power SRAM or not won't be a matter so much,
as the total standby current that I have measured was not so small but around
9uA
which is much more than typical standby current of standard 62256 SRAM.
Quote:
Are there more modern SRAM ICs available that could substitute for the 62256?
There are modern 32Kx8 SRAM as Renesus's M5M5256DFP-70XG or M5M5256DVP-70XG
which have wide operating voltage range of 3V to 5.5V
and very low standby current of 50nA(typ) at Vdd=3.3V,
but they are not supplied in a classical relatively large SOIC28 package.
Regards, Lyuka
p.s. Thanks TomC. Good luck.
# typo collected : 7uA -> 9uA
Edited: 19 Oct 2007, 10:28 p.m. after one or more responses were posted