SCI bus 8Kbit Serial CMOS EEPROM

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The AK6480C is a 8192bit, serial, read/write, non-volatile memory device fabricated using an advanced CMOS EEPROM technology.

The AK6480C has 8192bits of memory organized into 512 registers of 16 bits each.

The AK6480C 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.

The AK6480C can connect to the serial communication port of popular one chip microcomputer directly (3 line negative clock synchronous

interface). At write operation, AK6480C takes in the write data from data input pin (DI) to a register synchronously with rising edge of

input pulse of serial clock pin (SKB). And at read operation, AK6480C takes out the read data from a register to data output pin (DO)

synchronously with falling edge of SKB.

The AK6480C has 5 instructions such as READ, WRITE, PAGE WRITE, WREN (write enable) and WRDS (write disable).

Each instruction is organized by op-code block (8bits), address block (8bits) and data (8bits x 2). When input level of SKB pin is

high level and input level of chip select (CSB) pin is changed from high level to low level, AK6480C can receive the instructions.

Special features of the AK6480C include : automatic write time-out with auto-ERASE, Ready/BusyB status signal output and ultra-low

standby power mode when deselected (CSB=high).

Key Features

□ Wide VCC (1.8V to 5.5V) operation

□ 8192 bits: 512 × 16 organization


             - 0.8μA Max. (Standby mode)


     - Endurance : 1000K cycles/Address

     - Data Retention : 10 years


     - 8 word Page Write Mode

     - High speed operation ( fMAX=5MHz: VCC=4.5V to 5.5V )

     - Automatic write cycle time-out with auto-ERASE(5ms Max.)

     - Automatic address increment (READ)

     - Ready/BusyB status signal

     - Software and Hardware controlled write protection

□ 8pin MSOP

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Block Diagram

Block Diagram

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