Rohm BU9847

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Rohm BU9847GUL-W series is a serial EEPROM of I C BUS interface method. 1.7V single power source action and actions available at 400kHz.

Capacity: 4Kbit

Bit-format: 512x8


  1. Completely conforming to the world standard I C BUS. All controls available by 2 ports of serial clock (SCL)

and serial data(SDA)

  1. Other devices than EEPROM can be connected to the same port, saving microcontroller port.
  2. Actions available at 400kHz clock (1.7V~5.5V)
  3. 1.7~5.5V single power source action most suitable for battery use.
  4. Page write mode useful for initial value write at factory shipment.
  5. Auto erase and auto end function at data rewrite.
  6. Low current consumption: At write action (5V), 1.2mA (Typ.); At read action (5V), 0.2mA (Typ.); At standby action (5V) : 0.1μA (Typ.)
  7. Write mistake prevention function
  8. Page write
  9. Write (write protect) function added.
  10. Write mistake prevention function at low voltage.
  11. Number of pages 16Byte
  12. Data rewrite up to 1,000,000times.
  13. Data kept for 40 years.
  14. Noise filter built in SCL / SDA terminal
  15. Shipment data all address FFh.

Datasheet: File:Bu9847gul-w-e.pdf