23K640-ISLASHST datasheet(1/26 Pages) MICROCHIP | 64K SPI Bus Low-Power Serial SRAM

1 page

DS22126C-page 1

23A640/23K640

Device Selection Table

Features:

• Max. Clock 20 MHz

• Low-Power CMOS Technology:

- Read Current: 3 mA at 1 MHz

- Standby Current: 4

μA Max. at +85°C

• 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

• High Reliability

• Temperature Ranges Supported:

• Pb-Free and RoHS Compliant, Halogen Free

Pin Function Table

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.

Package Types (not to scale)

Part Number

VCC Range

Page Size

Temp. Ranges

Packages

23K640

2.7-3.6V

32 Byte

I, E

P, SN, ST

23A640

1.5-1.95V

32 Byte

P, SN, ST

- Industrial (I):

- Automotive (E):

-40

°C

-40

°C

+85

°C

+125

°C

Name

Function

Chip Select Input

Serial Data Output

VSS

Ground

Serial Data Input

SCK

Serial Clock Input

HOLD

Hold Input

VCC

Supply Voltage

VSS

VCC

HOLD

SCK

PDIP/SOIC/TSSOP

(P, SN, ST)

64K SPI Bus Low-Power Serial SRAM

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