SA25C020

• 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 1A)
• 8-SOIC Narrow Package
• MLF Leadless Package
• Temperature Range:
Industrial: -40°C to +85°C
Commercial: 0°C to +70°C

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. The memory can be written from 1 up to 256 bytes at a time via the Byte / Page Write (PW) instruction.The memory consists of 1024 pages or 262,144 bytes.

Each device requires only a 3.0V power supply (2.7 V to 3.6 V) for both read and write functions. Internally generated and regulated voltages are provided for the program and erase operations. The SA25C020 does not require a VPP supply.

The HOLDb pin may be used to suspend any serial communication without resetting the serial sequence. In addition, the serial interface allows a minimal-pin-count packaging designed to simplify PC board layout requirements and offers the designer a variety of low-voltage and low-power options.

The SA25C020 is available in a space-saving, 8-lead narrow SOIC package The SA25C020 is part of the SPI EEPROM family. It is designed to work with any SPIcompatible, high-speed microcontroller, and offers both hardware (WPb pin) and Software ("block protect") data protection.

For example, programming a 2-bit code into the status register prevents program with top ¼, top ½ or entire array write protection and enables block write protection. Separate program enable and program disable instructions are provided for additional data protection. Hardware data protection of SA25C020 is provided via the WPb pin to protect against inadvertent write attempts to the status register.Saifun's SPI Serial EEPROM products are designed and tested for applications requiring high endurance and low power consumption for a continuously reliable non-volatile solution for all markets