23A640 Series

1.5-1.95V 64Kb SPI Serial SRAM

Catalog

1.5-1.95V 64Kb SPI Serial SRAM

Part	Mounting Type	Technology	Memory Interface	Memory Type	Operating Temperature [Max]	Operating Temperature [Min]	Voltage - Supply [Max]	Voltage - Supply [Min]	Memory Format	Memory Organization	Supplier Device Package	Package / Case	Package / Case [y]	Package / Case [x]	Clock Frequency	Memory Size	Package / Case [custom]	Package / Case [custom]
Microchip Technology 23A640-I/SN	Surface Mount	SRAM	SPI	Volatile	85 °C	-40 °C	1.95 V	1.7 V	SRAM	8 K	8-SOIC	8-SOIC	3.9 mm	0.154 in	20 MHz	64 Kbit
Microchip Technology 23A640T-I/ST	Surface Mount	SRAM	SPI	Volatile	85 °C	-40 °C	1.95 V	1.7 V	SRAM	8 K	8-TSSOP	8-TSSOP			20 MHz	64 Kbit	0.173 "	4.4 mm

Catalog

1.5-1.95V 64Kb SPI Serial SRAM

Key Features

• + Max. Clock 16 MHz

• + Low-Power CMOS Technology:

- Read Current: 3 mA at 1 MHz

- Standby Current: 4 µA Max. at 3.6V

• + 8192 x 8-bit Organization

• + 32-Byte Page

• + HOLD pin

• + Flexible Operating modes:

- Byte read and write

- Page mode (32 Byte Page)

- Sequential mode

• + Sequential Read/Write

Description

The Microchip Technology Inc. 23X640 are 64 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. 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. The 23X640 is available in standard packages including 8-lead PDIP and SOIC, and advanced packaging including 8-lead TSSOP.