General Description

The NM24C04U/05U devices are 4K (4,096) bit serial interface CMOS EEPROMs (Electrically Erasable Programmable Read Only Memory). These devices fully conform to the Standard 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

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

■ 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

■ Data retention greater than 40 years

Functions

■ I2C™ compatible interface

■ 4,096 bits organized as 512 x 8

■ Extended 2.7V – 5.5V operating voltage

■ 100 KHz or 400 KHz operation

■ Self timed programming cycle (6ms typical)

■ Programming complete indicated by ACK polling

■ NM24C05U: Memory Upper Block Write Protect pin