???

galaxy76 wrote on 2023-02-20, 08:22:

mother board pdf service manual :

https://we.tl/t-n6sFdAE9sJ

on PAG 13 is present at27bv4096.

Well, that link doesn't work anymore.

As long as your board is running on 5V levels I'd say the hitachi should work as a substitute. It's has faster access speeds than the atmel, so that should be fine and the pinout seems to be identical too.

Pinouts are same so things will work as long as they contain same data.

thanks, the motherboard is 3.3v.

in the attached photo extracted from the service manual you can see the power supply. i searched the at27bv4096

grey_beard wrote on 2023-02-27, 18:34:

galaxy76 wrote on 2023-02-20, 08:22:

mother board pdf service manual :

https://we.tl/t-n6sFdAE9sJ

on PAG 13 is present at27bv4096.

Well, that link doesn't work anymore.

As long as your board is running on 5V levels I'd say the hitachi should work as a substitute. It's has faster access speeds than the atmel, so that should be fine and the pinout seems to be identical too.

now the link is active
https://we.tl/t-69crZn19qG

galaxy76 wrote on 2023-03-04, 06:53:

thanks, the motherboard is 3.3v.

in the attached photo extracted from the service manual you can see the power supply. i searched the at27bv4096

So the HN27C4096HCC is most likely not going to work, because it requires 5V supply voltage. Chips that work with 3.3V usually have the letter "V" (like "voltage") in their model number, as the AT27BV4096 does.

mkarcher wrote on 2023-03-04, 07:12:

galaxy76 wrote on 2023-03-04, 06:53:

thanks, the motherboard is 3.3v.

in the attached photo extracted from the service manual you can see the power supply. i searched the at27bv4096

So the HN27C4096HCC is most likely not going to work, because it requires 5V supply voltage. Chips that work with 3.3V usually have the letter "V" (like "voltage") in their model number, as the AT27BV4096 does.

I thank you. do you know if there is another compatible chip?

galaxy76 wrote on 2023-03-04, 13:12:

mkarcher wrote on 2023-03-04, 07:12:

galaxy76 wrote on 2023-03-04, 06:53:

thanks, the motherboard is 3.3v.

in the attached photo extracted from the service manual you can see the power supply. i searched the at27bv4096

So the HN27C4096HCC is most likely not going to work, because it requires 5V supply voltage. Chips that work with 3.3V usually have the letter "V" (like "voltage") in their model number, as the AT27BV4096 does.

I thank you. do you know if there is another compatible chip?

You need a PLCC44, 3.3V 256K x 16 EPROM (or pin compatible EEPROM or flash ROM). I searched using Google and some distributors, and I just found one other product of that type: The ST M27V402. Beware: Both the Atmel/Microchip chip and the ST chip are one-time programmable, and not erasable. If you purchase a used chip, it will be of no use. Make sure you get new old stock (or even new stock).

mkarcher wrote on 2023-03-04, 18:47:

galaxy76 wrote on 2023-03-04, 13:12:

mkarcher wrote on 2023-03-04, 07:12:

So the HN27C4096HCC is most likely not going to work, because it requires 5V supply voltage. Chips that work with 3.3V usually have the letter "V" (like "voltage") in their model number, as the AT27BV4096 does.

I thank you. do you know if there is another compatible chip?

You need a PLCC44, 3.3V 256K x 16 EPROM (or pin compatible EEPROM or flash ROM). I searched using Google and some distributors, and I just found one other product of that type: The ST M27V402. Beware: Both the Atmel/Microchip chip and the ST chip are one-time programmable, and not erasable. If you purchase a used chip, it will be of no use. Make sure you get new old stock (or even new stock).

thanks! 👍