CAT24WC03/05
2K/4K-Bit Serial EEPROM with Partial Array Write Protection
FEATURES
s
400 kHz I
2
C bus compatible*
s
1.8 to 5.5 volt operation
s
Low power CMOS technology
s
Write protect feature
s
Self-timed write cycle with auto-clear
s
1,000,000 Program/Erase cycles
s
100 Year data retention
s
8-pin DIP, 8-pin SOIC, 8-lead MSOP and 8-pin
TSSOP Package
temperature ranges
鈥揟op 1/2 array protected when WP at V
IH
s
16-Byte page write buffer
s
Commercial, industrial and automotive
s
"Green" package options available
DESCRIPTION
The CAT24WC03/05 is a 2K/4K-bit Serial CMOS
EEPROM internally organized as 256/512 words of 8
bits each. Catalyst鈥檚 advanced CMOS technology sub-
stantially reduces device power requirements. The
PIN CONFIGURATION
DIP Package (P, L, GL)
A0
A1
A2
VSS
1
2
3
4
8
7
6
5
VCC
WP
SCL
SDA
MSOP Package (R, Z, GZ)
A0
A1
A2
VSS
1
2
3
4
8
7
6
5
VCC
WP
SCL
SDA
TSSOP Package (U, Y, GY)
A0
A1
A2
1
2
3
4
8
7
6
5
PIN FUNCTIONS
Pin Name
A0, A1, A2
SDA
SCL
WP
V
CC
V
SS
i
D
c
s
VSS
u
n
i
t
n
o
SOIC Package (J, W, GW)
A0
A1
A2
1
2
3
4
8
7
6
5
VCC
WP
SCL
SDA
VSS
CAT24WC03/05 features a 16-byte page write buffer.
The device operates via the I
2
C bus serial interface, has
a special write protection feature, and is available in 8-
pin DIP or 8-pin SOIC packages.
BLOCK DIAGRAM
EXTERNAL LOAD
DOUT
ACK
SENSE AMPS
SHIFT REGISTERS
d
e
a
P
s
t
r
COLUMN
DECODERS
VCC
VSS
WORD ADDRESS
BUFFERS
VCC
WP
SCL
SDA
SDA
START/STOP
LOGIC
XDEC
CONTROL
LOGIC
E
2
PROM
WP
Function
DATA IN STORAGE
Device Address Inputs
Serial Data/Address
Serial Clock
Write Protect
+1.8V to +5.5V Power Supply
Ground
SCL
A0
A1
A2
STATE COUNTERS
SLAVE
ADDRESS
COMPARATORS
HIGH VOLTAGE/
TIMING CONTROL
* Catalyst Semiconductor is licensed by Philips Corporation to carry the I
2
C Bus Protocol.
漏 2005 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
1
Doc. No. 1005, Rev. F