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

Power Supply Operation

—Active Read Current Less Than 1mA

—Active Write Current Less Than 3mA

—Standby Current Less Than 1

µA

—Down to 1.8V

—Schmitt Trigger Input Noise Suppression

—Output Slope Control for Ground Bounce

Noise Elimination

—Minimizes Total Write Time Per Byte

—Typical Write Cycle Time of 5ms

—Endurance: 1,000,000 Cycles

—Data Retention: 100 Years

DESCRIPTION

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.

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

array is protected against any nonvolatile write

attempts.

tested for applications requiring extended endurance.

Inherent data retention is greater than 100 years.

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

WRITE VOLTAGE

CONTROL

7040 FM 01

ARRAY

4K x 8