DESCRIPTION

The IS25C128 and IS25C256 are electrically erasable PROM devices that use the Serial Peripheral Interface (SPI) for communications. The IS25C128 is 128Kbit (16K x 8) and the IS25C256 is 256Kbit (32K x 8). The IS25C128/256 EEPROMs are offered in a wide operating voltage range of 1.8V to 5.5V for compatibility with most application voltages. ISSI designed the IS25C128/256 to be an efficient SPI EEPROM solution. The devices are packaged in 8-pin JEDEC SOIC, 8-pin EIAJ SOIC, and 8-pin PDIP.

FEATURES

• Serial Peripheral Interface (SPI) Compatible

— Supports SPI Modes 0 (0,0) and 3 (1,1)

• Low power CMOS

— Active current less than 3.0 mA (2.5V)

— Standby current less than 20 µA (2.5V)

• Low-voltage Operation

— Vcc = 1.8V to 5.5V

• Block Write Protection

— Protect 1/4, 1/2, or Entire Array

• 64 byte page write mode

— Partial page writes allowed

• 2.1 MHz Clock Rate (5V)

• Self timed write cycles

— 5ms max @ 2.5V

• High-reliability

— Endurance: 1,000,000 cycles per byte

— Data retention: 100 years

• 8-pin JEDEC SOIC, 8-pin EIAJ SOIC, and 8-pin PDIP packages available

• Industrial and Automotive temperature ranges

• Lead-free available