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