Preliminary Information
XP2in4072N2o Connect
2K
X24022
Serial E2PROM
256 x 8 Bit
FEATURES
• 2.7V to 5.5V Power Supply
• Low Power CMOS
—Active Current Less Than 1 mA
—Standby Current Less Than 50 µA
• Internally Organized 256 x 8
• Self Timed Write Cycle
—Typical Write Cycle Time of 5 ms
• 2 Wire Serial Interface
—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
DESCRIPTION
The X24022 is a CMOS 2048 bit serial E2PROM, 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.
Xicor E2PROMs are designed and tested for applica-
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.
FUNCTIONAL DIAGRAM
(8) VCC
(4) VSS
(5) SDA
START
STOP
LOGIC
START CYCLE
H.V. GENERATION
TIMING
& CONTROL
(6) SCL
(3) A2
(2) A1
(1) A0
SLAVE ADDRESS
REGISTER
+COMPARATOR
CONTROL
LOGIC
LOAD
INC
WORD
ADDRESS
COUNTER
R/W
DOUT
ACK
PIN
XDEC
E2PROM
64 X 32
YDEC
8
CK DATA REGISTER DOUT
3848 FHD F01
© Xicor, 1991 Patents Pending
3848-1
1 Characteristics subject to change without notice
