Description: The Microchip Technology Inc. 23X256 are 256 Kbit 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) plus separate data in (SI) and data out (SO) lines. Features: • Max. Clock 20 MHz • Low-Power CMOS Technology: \- Read Current: 3 mA at 1 MHz \- Standby Current: 4 A Max. at +85°C • 32,768 x 8-bit Organization • 32-Byte Page • Sequential Read/Write • High Reliability • Temperature Ranges Supported: \- Industrial (I): -40°C to +85°C \- Automotive (E): -40°C to +125°C
The 23K256-I/SN is a 256K SPI bus low-power Serial SRAM Device. The memory is accessed via a simple serial peripheral interface (SPI) compatible serial bus. The bus signals required are a clock input (SCK) plus separate data in (SI) and data out (SO) lines. Access to the device is controlled through a chip select (CS) input. Communication to the device can be paused via the hold pin (hold). While the device is paused, transitions on its inputs will be ignored, with the exception of chip select, allowing the host to service higher priority interrupts.