| Electronics > Beginners |
| Help needed identifying PDIP EEPROM |
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| ESXi:
Hello, I want to read a EEPROM chip, but I can't find the brand or datasheet. It is a "P95AD 93C46EN". The chips looks like this with also the "F" on it. (See the attached image of my chip) All the information I found was this; http://www.int-thinking.net/ic218914/93C46EN.html it says manutacturer NSC, this is not right? It's also not FairChild or Micro-something and so on? What I do know is that it is the same brand chip and same model number so it is a three-wire serial eeprom 1k. In the end I want to connect this to my Arduino and dump the eeprom and write it to a new one. |
| DC1MC:
It's a Microwire EEPROM, a bastard child protocol between SPI and I2C >:D http://ww1.microchip.com/downloads/en/devicedoc/21712B.pdf Read/Write it with this stuff: https://github.com/tim0s/MicrowireEEPROM Good luck, DC1MC |
| ESXi:
Hey Thanks DC1MC! I will post pictures here when I finished all the work. My speedometer failed today in my car (earlier replaced the sensor in the transmission) but today the stepper motor gave the ghost >:( and had to buy a "new used" mileage clock. Hopefully I can restore it with original mileage.. I did a continuity test on the stepper motor, the last contacts in the motor almost at the end are crunchy as f. The pointer stays between 0 and 2 and it's tripping when I power up the dashboard. It's a old VW 3. |
| amyk:
It is Fairchild (now ON), part is FM93C46EN. Non-RoHS and very old, obsolete part. |
| drussell:
The 93C46 is a bog-standard EEPROM, readily available in many different versions. Digikey alone returns 306 hits with 67 varieties in stock for immediate shipment... I can't see why you would have difficulty finding datasheets for them, they're a common part. |
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