23K256 datasheet(1/28 Pages) MICROCHIP

Part #	23K256

Description	256K SPI Bus Low-Power Serial SRAM

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Manufacturer	MICROCHIP [Microchip Technology]

Direct Link	http://www.microchip.com

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 2010 Microchip Technology Inc.

DS22100E-page 1

23A256/23K256

Device Selection Table

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

•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. 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. 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 23X256 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

23K256

2.7-3.6V

32 Byte

I, E

P, SN, ST

23A256

1.5-1.95V

32 Byte

I

P, SN, ST

- Industrial (I):

- Automotive (E):

-40

C

-40

C

to

+85

C

+125

C

Name

Function

CS

Chip Select Input

SO

Serial Data Output

VSS

Ground

SI

Serial Data Input

SCK

Serial Clock Input

HOLD

Hold Input

VCC

Supply Voltage

CS

SO

NC

VSS

1

2

3

4

8

7

6

5

VCC

HOLD

SCK

SI

PDIP/SOIC/TSSOP

(P, SN, ST)

256K SPI Bus Low-Power Serial SRAM

Similar Part No. - 23K256

Manufacturer	Part #	Datasheet	Description
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23K256 Datasheet(PDF) 1 Page - Microchip Technology

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