General Description
The SA25C020 is a 2Mb (512K X 4) CMOS non-volatile serial EEPROM. This device fully conforms to the SPI 4-wire protocol, is enabled through the Chip Select (CSb) pin, and uses Clock (SCK), Data-in (SI) and Data-out (SO) pins to synchronously control data transfer between the SPI microcontroller and the Serial EEPROM.

FEATUREs
• Saifun NROM™ Cell
• Serial Peripheral Interface (SPI) Compatible, Supports SPI Modes 0 (0,0) and 3 (1,1)
• Byte and Page Write Operation:
    – 1024 pages (256 Bytes/Page)
    – Single Byte or Page Write Cycle in 10ms Typical
• Single Supply Voltage: 2.7V to 3.6V
• 25MHz Clock Rate
• Block Write Protection: Protect Quarter, Half or Entire Array
• Write Protect Pin and Write Disable Instructions of Both Hardware and Software Data Protection
• 100,000 Erase Cycles (Minimum)
• More than 20-Year Data Retention
• Low-power Standby Current (less than 1µA)
• 8-SOIC Narrow Package
• MLF Leadless Package
• Temperature Range:
    – Industrial: -40°C to +85°C
    – Commercial: 0°C to +70°C