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CAT24AC128
128kbit I2C Serial CMOS EEPROM With Three Chip Address Input Pins
E TM
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FEATURES
I 400kHz (2.5V) and 100kHz (1.8V) I2C bus
I Commercial, industrial and extended
compatibility
automotive temperature ranges
I 1.8 to 5.5 volt operation
I Low power CMOS technology
I Write protect feature
– Entire array protected when WP at VIH
I 1,000,000 program/erase cycles
I 100 year data retention
I Schmitt trigger filtered inputs for noise
suppression
I 64-Byte page write buffer
I 8-Pin DIP, 8-Pin SOIC (JEDEC/EIAJ) or
14-pin TSSOP
I Self-timed write cycle with auto-clear
DESCRIPTION
The CAT24AC128 is a 128kbit Serial CMOS EEPROM
internally organized as 16,384 words of 8 bits each.
Catalyst’s advanced CMOS technology substantially
reducesdevicepowerrequirements. TheCAT24AC128
featuresa64-bytepagewritebuffer.Thedeviceoperates
via the I2C bus serial interface and is available in 8-pin
DIP, 8-pin SOIC or 14-pin TSSOP packages. Three
device address inputs allows up to 8 devices to share a
common 2-wire I2C bus.
BLOCK DIAGRAM
PIN CONFIGURATION
DIP Package (P, L)
SOIC Package (J, K, W, X)
EXTERNAL LOAD
1
2
3
4
8
7
6
5
1
2
3
4
8
7
6
5
V
V
CC
WP
A0
A1
A2
A0
A1
CC
SENSE AMPS
SHIFT REGISTERS
D
OUT
WP
ACK
A2
SCL
SDA
SCL
SDA
V
V
CC
SS
V
V
SS
SS
WORD ADDRESS
BUFFERS
COLUMN
DECODERS
TSSOP Package (U14, Y14)
512
1
2
3
4
5
6
7
14
13
12
11
10
9
A0
V
WP
NC
NC
NC
CC
START/STOP
SDA
A1
NC
NC
NC
A2
LOGIC
E2PROM
256X512
XDEC
256
SCL
SDA
V
8
SS
CONTROL
LOGIC
WP
PIN FUNCTIONS
DATA IN STORAGE
Pin Name
Function
SDA
SCL
WP
Serial Data/Address
Serial Clock
HIGH VOLTAGE/
TIMING CONTROL
Write Protect
SCL
STATE COUNTERS
VCC
+1.8V to +5.5V Power Supply
Ground
SLAVE
ADDRESS
COMPARATORS
A0
A1
A2
VSS
A0 - A2
Device Address Inputs
2
* Catalyst Semiconductor is licensed by Philips Corporation to carry the I C Bus Protocol.
© Catalyst Semiconductor, Inc.
Doc. No. 1028, Rev. K
1
Characteristics subject to change without notice