General Description:

The NM24C65U is a 64K (65,536) bit serial interface CMOS EEPROM (Electrically Erasable Programmable Read-Only Memory). This device fully conforms to the Extended I2C™ 2-wire protocol which uses Clock (SCL) and Data I/O (SDA) pins to synchronously clock data between the master (for example a microprocessor) and the slave (the EEPROM device). In addition, the serial interface allows a minimal pin count packaging designed to simplify PC board layout requirements and offers the designer a variety of low voltage and low power options.

Features

■ The I2C™ interface allows the smallest I/O pincount of any

EEPROM interface

■ 32 byte page write mode to minimize total write time per byte

■ Low VCC programming lockout (3.8V)

— H option (Standard VCC range) parts only

■ Typical 200µA active current (ICCA)

■ Typical 1µA standby current (ISB) for L devices and 0.1µA

standby current for LZ devices

■ Endurance: Up to 1,000,000 data changes

Functions

■ I2C™ compatible interface

■ 65,536 bits organized as 8,192 x 8

■ 100 KHz or 400 KHz operation

■ Extended 2.7V – 5.5V operating voltage

■ Self timed programming cycle (6ms typical)

■ Programming complete indicated by ACK polling

■ Memory Upper Block Write Protect pin