The Microchip AT34C04 is a 4 Kb Serial EEPROM utilizing an I²C (2-wire) serial interface. The device is organized as one block of 512 x 8 and is optimized for use in consumer and industrial applications where reliable and dependable nonvolatile memory storage is essential. The EEPROM is available in a variety of space-saving packaging options with an operating range of 1.7 to 3.6V.

The AT34C04 is tailored specifically for DRAM memory modules with Serial Presence Detect (SPD). The device incorporates a Reversible Software Write Protection (RSWP) feature enabling the capability to selectively write protect any or all of the four 128-byte quadrants.

• 512 x 8 (4 Kbit)
• 2-Wire Serial Interface, I²C Compatible
  • 400 kHz and 1 MHz clock compatibility
  • Supports up to 8 devices on the bus
• JEDEC JC42.4 (EE1004-v) Serial Presence Detect (SPD) Compliant
• Advanced Software Data Protection Features 
  • Individually reversible software write protection on all four 128-byte quadrants 
  • Software procedure to verify each quadrant’s write protection status
• Self-Timed Erase and Write Cycles (5 ms max.)
• Low Power Consumption
  • Read current 0.4 mA (Typ), 1 mA (Max)
  • Write current 1.5 mA (Typ), 3 mA (Max)
  • Standby current 4 uA (Max)
• Hardware Write-Protect Pin
• More than 1 million erase/write cycles
• Data retention > 100 years
• Available in 8-lead JEDEC SOIC, 8-lead TSSOP, and 8-pad UDFN