General Description
The AK6420A/40A/80A is a 2048/4096/8192bit, serial, read/write, non-volatile memory device fabricated using an advanced CMOS EEPROM technology. The AK6420A has 2048bits of memory organized into 128 registers of 16 bits each. The AK6440A has 4096bits of memory organized into 256 registers of 16 bits each. The AK6480A has 8192bits of memory organized into 512 registers of 16 bits each. The AK6420A/40A/80A can operate full function under wide operating voltage range from 1.8V to 5.5V. The charge up circuit is integrated for high voltage generation that is used for write operation.

FEATUREs
□ ADVANCED CMOS EEPROM TECHNOLOGY
□ Wide Vcc (1.8V ∼ 5.5V) operation
□ AK6420A • • 2048 bits: 128 × 16 organization
    AK6440A • • 4096 bits: 256 × 16 organization
    AK6480A • • 8192 bits: 512 × 16 organization
□ ONE CHIP MICROCOMPUTER INTERFACE
    - Interface with one chip microcomputers serial communication port directly
□ LOW POWER CONSUMPTION
    - 0.75mA Max (Read operation)
    - 0.8µA Max (Standby mode)
□ HIGH RELIABILITY
    -Endurance : 100K cycles
    -Data Retention : 10 years
□ SPECIAL FEATURES
    - High speed operation ( fMAX=1MHz: Vcc=2.5V )
    - Automatic write cycle time-out with auto-ERASE
    - Automatic address increment (READ)
    - Ready/Busy status signal
    - Software and Hardware controlled write protection
□ IDEAL FOR LOW DENSITY DATA STORAGE
    - Low cost, space saving, 8-pin package (SOP, SSOP)