
1
DESCRIPTION
The CAT24WC128 is a 128K-bit Serial CMOS E
2
PROM
internally organized as 16384 words of 8 bits each.
Catalyst’s advanced CMOS technology substantially
reduces device power requirements. The
Preliminary
CAT24WC128
128K-Bit I
2
C Serial CMOS E
2
PROM
* Catalyst Semiconductor is licensed by Philips Corporation to carry the I
2
C Bus Protocol.
I
Write Protect Feature
– Entire Array Protected When WP at V
IH
I
100,000 Program/Erase Cycles
I
100 Year Data Retention
I
8-Pin DIP, 8-Pin SOIC or 14-pin TSSOP
CAT24WC128 features a 64-byte page write buffer. The
device operates via the I
2
C bus serial interface and is
available in 8-pin DIP, 8-pin SOIC or 14-pin TSSOP
packages.
PIN CONFIGURATION
BLOCK DIAGRAM
PIN FUNCTIONS
Pin Name
Function
SDA
Serial Data/Address
SCL
Serial Clock
WP
Write Protect
V
CC
+1.8V to +6V Power Supply
V
SS
Ground
24WC128 F02
I
1MHz I
2
C Bus Compatible*
I
1.8 to 6 Volt Operation
I
Low Power CMOS Technology
I
64-Byte Page Write Buffer
I
Self-Timed Write Cycle with Auto-Clear
I
Commercial, Industrial and Automotive
Temperature Ranges
FEATURES
DIP Package (P)
SOIC Package (J,K)
24WC128 F01
1999 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
NC
NC
VSS
VSS
NC
NC
VCC
WP
SCL
SDA
1
2
3
4
8
7
6
5
NC
VCC
WP
SCL
SDA
1
2
3
4
8
7
6
5
NC
DOUT
ACK
SENSE AMPS
SHIFT REGISTERS
CONTROL
LOGIC
WORD ADDRESS
BUFFERS
START/STOP
LOGIC
STATE COUNTERS
E
2
PROM
256X512
VCC
EXTERNAL LOAD
COLUMN
DECODERS
XDEC
DATA IN STORAGE
HIGH VOLTAGE/
TIMING CONTROL
VSS
WP
SCL
SDA
256
512
Doc. No. 25060-00 6/99 S-1
NC
NC
NC
NC
NC
VSS
NC
2
3
4
5
6
13
12
11
10
9
7
8
1
14
SDA
WP
NC
NC
NC
SCL
VCC
TSSOP Package (U14)