Hi.
I am using NVRAM FM16W08 on one circuit, to replace the original RAM. The question is that it is giving me problems, and I no longer know if it is because they arrive defective from China, damaged when welding them (although this would be rare because I solder them in the oven, with a controlled temperature curve reaching a maximum of 237 degrees Celsius during 10 seconds, according to the datasheet it would support up to 260 degrees centigrade for 10 seconds) or for another problem of my design.
I would like to be able to check these NVRAMs before installing them in my circuit to make sure that they are not really defective from the Chinese, or that they are being damaged in the circuit for some unknown reason.
The question is whether I could use the TL866 II Plus programmer, selecting SRAM 6264 to check the NVRAM FM16W08. The pinout is the same, data bus, addresses and control lines, except for a second CE pin that is only on 6264 (CE # and CE2). In NVRAM there is only one negative logic CE, which matches the same pin on 6264. Both can be powered at 5v. Another more complex system would be creating my own tester for NVRAM, using a microcontroller.
Has anyone used the TL866 II plus to check NVRAM or do you think it is possible to check NVRAM FM16W08 by selecting RAM 6264?, both are 64 Kbit, 8kx8, parallel, 5v supply, same pinout except a second CE in 6264 RAM.
I don't have NVRAM to do the tests now, the ones I had I soldered them all on 15 boards. I'm waiting for two units to arrive in a few days, this time I ordered them from Farnell. Since they are SOIC28, I also have a SOIC28 to DIP28 adapter to put it in the TL866 programmer.
Regards