DESCRIPTION

The IS24C256 is an electrically erasable PROM device that uses the standard 2-wire interface for communications. The IS24C256 contains a memory array of 256K-bits (32,768 x 8), and is further subdivided into 512 pages of 64 bytes each for PageWrite mode. This EEPROM is offered in wide operating voltages of 1.8V to 5.5V (IS24C256-2) and 2.5V to 5.5V (IS24C256-3) to be compatible with most application voltages. ISSI designed the IS24C256 to be a low-cost and low-power 2-wire EEPROM solution. The devices are packaged in 8-pin PDIP, 8-pin SOIC, and 14-pin TSSOP.

FEATURES

• Organization:

– 32K-bit x 8-bit

• 64-Byte Page Write Buffer

• Two-Wire Serial Interface

– Bi-directional data transfer protocol

• Low Power CMOS Technology

– Active Current less than 3 mA (5V)

– Standby Current less than 6 µA (5V)

– Standby Current less than 2 µA (2.5V)

• Wide Voltage Operation

– IS24C256-2: Vcc = 1.8V to 5.5V

– IS24C256-3: Vcc = 2.5V to 5.5V

• 1 MHz (I2CTM Protocol) Compatibility

• Hardware Data Protection

– Write Protect pin

• Sequential Read Feature

• Filtered Inputs for Noise Suppression

• Self time Write cycle with auto clear

– 5 ms @ 5.0V

• High Reliability

– Endurance: 100,000 Cycles

– Data Retention: 40 Years

• Commercial and Industrial temperature ranges

• 8-pin PDIP, 8-pin SOIC, and 14-pin TSSOP