CAT24WC256 Datasheet, PDF (1/8 Pages) Catalyst Semiconductor – 256K-Bit I2C Serial CMOS EEPROM

Preliminary
CAT24WC256
256K-Bit I²C Serial CMOS E²PROM
FEATURES
s 1MHz I²C Bus Compatible*
s 1.8 to 6 Volt Operation
s Low Power CMOS Technology
s 64-Byte Page Write Buffer
s Self-Timed Write Cycle with Auto-Clear
s Commercial, Industrial and Automotive
Temperature Ranges
DESCRIPTION
The CAT24WC256 is a 256K-bit Serial CMOS E²PROM
internally organized as 32,768 words of 8 bits each.
Catalyst’s advanced CMOS technology substantially
reduces device power requirements. The
s Write Protect Feature
– Entire Array Protected When WP at V_IH
s 100,000 Program/Erase Cycles
s 100 Year Data Retention
s 8-Pin DIP or 8-Pin SOIC
CAT24WC256 features a 64-byte page write buffer. The
device operates via the I²C bus serial interface and is
available in 8-pin DIP or 8-pin SOIC packages.
PIN CONFIGURATION
DIP Package (P)
A0 ¹
A1 2
NC 3
VSS 4
8 VCC
7 WP
6 SCL
5 SDA
BLOCK DIAGRAM
EXTERNAL LOAD
VCC
VSS
DOUT
ACK
WORD ADDRESS
BUFFERS
SENSE AMPS
SHIFT REGISTERS
COLUMN
DECODERS
SOIC Package (K)
A0 ¹
A1 ²
NC ³
VSS 4
8 VCC
7 WP
6 SCL
5 SDA
24WC256 F01
PIN FUNCTIONS
Pin Name
Function
A0, A1
Address Inputs
SDA
Serial Data/Address
SCL
Serial Clock
WP
Write Protect
VCC
+1.8V to +6.0V Power Supply
VSS
Ground
NC
No Connect
SDA
WP
START/STOP
LOGIC
CONTROL
LOGIC
XDEC
SCL
A0
A1
STATE COUNTERS
SLAVE
ADDRESS
COMPARATORS
* Catalyst Semiconductor is licensed by Philips Corporation to carry the I²C Bus Protocol.
512
E²PROM
512
512X512
DATA IN STORAGE
HIGH VOLTAGE/
TIMING CONTROL
24WC256 F02
© 1998 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
1
Doc. No. 25061-00 6/99 S-1