CAT24WC33 Datasheet, PDF (1/8 Pages) Catalyst Semiconductor – 32K/64K-Bit I2C Serial CMOS E2PROM

Preliminary
CAT24WC33/65
32K/64K-Bit I²C Serial CMOS E²PROM
FEATURES
s 400 KHz I²C Bus Compatible*
s 1.8 to 6 Volt Read and Write Operation
s Cascadable for up to Eight Devices
s 32-Byte Page Write Buffer
s Self-Timed Write Cycle with Auto-Clear
s 8-Pin DIP or 8-Pin SOIC
s Schmitt Trigger Inputs for Noise Protection
DESCRIPTION
The CAT24WC33/65 is a 32K/64K-bit Serial CMOS
E²PROM internally organized as 4096/8192 words of 8
bits each. Catalyst’s advanced CMOS technology sub-
stantially reduces device power requirements. The
s Zero Standby Current
s Commercial, Industrial and Automotive Tem-
perature Ranges
s Write Protection
–Bottom 1/4 Array Protected When WP at V_IH
s 1,000,000 Program/Erase Cycles
s 100 Year Data Retention
CAT24WC33/65 features a 32-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
A2 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 (J,K)
A0 1
A1 2
A2 3
VSS 4
PIN FUNCTIONS
8 VCC
7 WP
6 SCL
5 SDA
24WC33/65 F01
SDA
WP
START/STOP
LOGIC
CONTROL
LOGIC
256
E²PROM
XDEC 128/256 _{128/256 X 256}
Pin Name
Function
A0, A1, A2 Device Address Inputs
DATA IN STORAGE
SDA
SCL
Serial Data/Address
Serial Clock
HIGH VOLTAGE/
TIMING CONTROL
WP
Write Protect
VCC
+1.8V to +6V Power Supply
VSS
Ground
SCL
A0
A1
A2
STATE COUNTERS
SLAVE
ADDRESS
COMPARATORS
* Catalyst Semiconductor is licensed by Philips Corporation to carry the I²C Bus Protocol.
24WC33/65 F02
© 1998 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
1
Doc. No. 25064-00 2/98 S-1