SA25C020 is a 2Mb (512K x 4) CMOS non-volatile serial EEPROM, fully complies with 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 EEPROM.
SA24C1024 is a 1024Kbit CMOS non-volatile serial EEPROM organized as 128K x 8 bit memory. This device conforms to Extended IIC 2-wire protocol, which enables accessing of memory in excess of 16 Kbits on an IIC bus. This serial communication protocol uses a Clock signal (SCL) and a Data signal (SDA) to synchronously clock data between a Master (for example, a microcontroller) and a Slave (EEPROM). The SA24C1024 features low power consumption, hardware and software write protection, and endurance of up to 1 million data changes.
