Does anyone know if the DS1220AD will work as a direct replacement for the DS1220Y NVRAM chip currently installed in the HP-3458A? There is a timing difference between the two devices, as explained in Maxim AN 202.
"the "Y" parts had a reset timeout on the order of milliseconds while the "AD" parts have a timeout of 125ms. When replacing the Y part with the AD part, it must be determined that the controlling processor does not become active during a power-up cycle for at least 125ms to ensure that the NV SRAM is available before the processor attempts a memory access." There have been documented cases where the new DS1220AD part will not work in circuits designed with the DS1220Y (now discontinued). I would like to know if anyone has successfully utilized the DS1220AD before proceeding to buy the parts. Similar question for the DS1230Y and DS1230AD. Thanks, Randy Evans _______________________________________________ volt-nuts mailing list -- volt-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there.
