AT24C64 Serial EEPROM I2C 2 wire DIP-8 ATMEL


5 in stock

The AT24C64 provides 8192 bytes of EEPROM that can be connected easily to most microcontrollers using I2C.

Up to eight of these EEPROMs can be connected to the same microcontroller by using the address pins A0 to A2 to assign a unique address to each EEPROM.

The pinout is as follows:

  1. A0: Address bit 0
  2. A1: Address bit 1
  3. A2: Address bit 2
  4. GND: Ground
  5. SDA: Serial Data
  6. SCL: Serial Clock Input
  7. WP: Write Protect
  8. VCC: Positive Voltage (between 2.7V and 5.5V)

The address bits are used to make up a binary number allowing you to set an address if you have multiple EEPROMs on one I2C bus.

For example, setting A0 to 1, A1 to 1 and A2 to 0 would produce a binary number of 011 – which is 3 in decimal.

The Write Protect pin allows you to protect the top 2048 bytes of memory from changes – if this pin is low (0V) then all writes are allowed. If the pin is high (5V) and the address is in the top 2048 bytes, the write is ignored.

For more information, please see the Atmel AT24C64 datasheet: AT24C64/AT24C32 Datasheet



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