General Description

The NM34W02 is 2048 bits of CMOS non-volatile electrically erasable memory. This device is specifically designed to support Serial Presence Detect circuitry in memory modules. This communications protocol uses CLOCK (SCL) and DATA I/O (SDA) lines to synchronously clock data between the master (for example a microprocessor) and the slave EEPROM device(s).

Features

■ PC100 Compliant

■ Extended Operating Voltage: 2.7V-5.5V

■ Software Write-Protection for first 128 bytes

■ Hardware Write-Protection for entire memory array

■ 200 µA active current typical

– 1.0 µA standby current typical (L)

– 0.1 µA standby current typical (LZ)

■ IIC compatible interface

– Provides bidirectional data transfer protocol

■ Sixteen byte page write mode

– Minimizes total write time per byte

■ Self timed write cycle

- Typical write cycle time of 6ms

■ Endurance: 1,000,000 data changes

■ Data retention greater than 40 years

■ Packages available: 8-pin TSSOP and 8-pin SO

■ Temperature Ranges: Commercial and Extended