Preliminary Information
Pin 7 No Connect
X24022
2K
X24022
256 x 8 Bit
Serial E2PROM
FEATURES
DESCRIPTION
2
• 2.7V to 5.5V Power Supply
• Low Power CMOS
The X24022 is a CMOS 2048 bit serial E PROM, inter-
nally organized 256 x 8. The X24022 features a serial
interface and software protocol allowing operation on a
simple two wire bus. Three address inputs allow up to
eight devices to share a common two wire bus.
—Active Current Less Than 1 mA
—Standby Current Less Than 50 µA
• Internally Organized 256 x 8
• Self Timed Write Cycle
2
Xicor E PROMs are designed and tested for applica-
—Typical Write Cycle Time of 5 ms
• 2 Wire Serial Interface
tions requiring extended endurance. Inherent data re-
tention is greater than 100 years. The X24022 is avail-
able in eight pin DIP and SOIC packages.
—Bidirectional Data Transfer Protocol
• Four Byte Page Write Operation
—Minimizes Total Write Time Per Byte
• High Reliability
—Endurance: 100,000 Cycles Per Byte
—Data Retention: 100 Years
FUNCTIONAL DIAGRAM
(8) V
(4) V
CC
SS
H.V. GENERATION
START CYCLE
TIMING
& CONTROL
START
STOP
(5) SDA
LOGIC
CONTROL
LOGIC
SLAVE ADDRESS
REGISTER
+COMPARATOR
2
E PROM
XDEC
64 X 32
LOAD
INC
(6) SCL
(3) A
WORD
2
ADDRESS
COUNTER
(2) A
(1) A
1
0
R/W
YDEC
8
CK
D
OUT
PIN
DATA REGISTER
D
OUT
ACK
3848 FHD F01
© Xicor, 1991 Patents Pending
3848-1
Characteristics subject to change without notice
1
XICOR [ XICOR INC. ]
