Description
The Microchip Technology Inc. 23A1024/23LC1024 are 1 Mbit Serial SRAM devices. The memory is accessed via a simple Serial Peripheral Interface (SPI) compatible serial bus. The bus signals required are a clock input (SCK), a data in line (SI) and a data out line (SO). Access to the device is controlled through a Chip Select (CS) input. Additionally, SDI (Serial Dual Interface) and SQI (Serial Quad Interface) is supported if your application needs faster data rates.

Features
• SPI Bus Interface:
    - SPI compatible
    - SDI (dual) and SQI (quad) compatible
    - 20 MHz Clock rate for all modes
• Low-Power CMOS Technology:
    - Read Current: 3 mA at 5.5V, 20 MHz
    - Standby Current: 4 μA at +85°C
• Unlimited Read and Write Cycles
• Zero Write Time
• 128K x 8-bit Organization:
    - 32-byte page
• Byte, Page and Sequential Mode for Reads and Writes
• High Reliability
• Temperature Ranges Supported:
• RoHS Compliant
• 8 Lead SOIC, TSSOP and PDIP Packages
    - Industrial (I): -40C to +85C
    - Automotive (E): -40C to +125C