X24321 datasheet(1/13 Pages) XICOR

Part #	X24321

Description	400 KHz 2-Wire Serial E2PROM

PDF	13 Pages

Scroll/Zoom	100%

Manufacturer	XICOR [Xicor Inc.]

Direct Link	http://www.xicor.com

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400 KHz 2-Wire Serial E2PROM

32K

4K x 8 Bit

©Xicor, 1995, 1996 Patents Pending

Characteristics subject to change without notice

7040 3/27/97 T0/C0/D0 SH

1

X24321

FUNCTIONAL DIAGRAM

FEATURES

• 1.8V to 3.6V, 2.5V to 5.5V and 4.5V to 5.5V

Power Supply Operation

• Low Power CMOS

—Active Read Current Less Than 1mA

—Active Write Current Less Than 3mA

—Standby Current Less Than 1

µA

• 400KHz Fast Mode 2-Wire Serial Interface

—Down to 1.8V

—Schmitt Trigger Input Noise Suppression

—Output Slope Control for Ground Bounce

Noise Elimination

• Internally Organized 4K x 8 Bit

• 32 Byte Page Write Mode

—Minimizes Total Write Time Per Byte

• Hardware Write Protect

• Bidirectional Data Transfer Protocol

• Self-Timed Write Cycle

—Typical Write Cycle Time of 5ms

• High Reliability

—Endurance: 1,000,000 Cycles

—Data Retention: 100 Years

• 8-Lead SOIC

DESCRIPTION

The X24321 is a CMOS Serial E2PROM Memory,

internally organized 4K x 8. The device features a

serial interface and software protocol allowing opera-

tion on a simple two wire bus. The bus operates at

400KHz all the way down to 1.8V.

Three device select inputs (S0–S2) allow up to eight

devices to share a common two wire bus.

Hardware Write Protection is provided through a Write

Protect (WP) input pin on the X24321. When the WP

pin is HIGH, the upper quadrant of the Serial E2PROM

array is protected against any nonvolatile write

attempts.

Xicor Serial E2PROM Memories are designed and

tested for applications requiring extended endurance.

Inherent data retention is greater than 100 years.

SERIAL E2PROM DATA

AND ADDRESS (SDA)

SCL

S2

S1

S0

WP

COMMAND

DECODE

AND

CONTROL

LOGIC

DEVICE

SELECT

LOGIC

WRITE

PROTECT

LOGIC

PAGE

DECODE

LOGIC

DATA REGISTER

Y DECODE LOGIC

E2PROM

WRITE VOLTAGE

CONTROL

7040 FM 01

ARRAY

4K x 8

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