CAT24C021 View Datasheet(PDF) - Catalyst Semiconductor => Onsemi
Part Name
Description
View to exact match
CAT24C021
Catalyst Semiconductor => Onsemi
CAT24C021 Datasheet PDF : 12 Pages
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Advanced
CAT24C161/162(16K), CAT24C081/082(8K)
CAT24C041/042(4K), CAT24C021/022(2K)
Supervisory Circuits with I2C Serial CMOS E2PROM, Precision Reset Controller and Watchdog Timer
FEATURES
s Watchdog Timer on SDA for 24CXX1
s Programmable Reset Threshold
s 400 KHz I2C Bus Compatible
s 2.7 to 6 Volt Operation
s Low Power CMOS Technology
s 16 - Byte Page Write Buffer
s Built-in inadvertent write protection
— VCC Lock Out
s Active High or Low Reset Outputs
— Precision Power Supply Voltage Monitoring
— 5V, 3.3V and 3V options
s 1,000,000 Program/Erase Cycles
s 100 Year Data Retention
s 8-Pin DIP or 8-Pin SOIC
s Commercial, Industrial and Automotive
Temperature Ranges
DESCRIPTION
The CAT24CXXX is a single chip solution to three
popular functions of EEPROM memory, precision reset
controller and watchdog timer. The 24C161/162(16K),
24C081/082(8K), 24C041/042(4K) and 24C021/022(2K)
feature a I2C Serial CMOS EEPROM. Catalyst's ad-
vanced CMOS technology substantially reduces device
power requirements. The 24CXXX features a 16-byte
page and is available in 8-pin DIP or 8-pin SOIC packages.
The reset function of the 24CXXX protects the system
during brown out and power up/down conditions. During
system failure the watchdog timer feature protects the
microcontroller with a reset signal. 24CXXX features
active low reset on pin 2 and active high reset on pin 7.
24CXX1 features watchdog timer on the SDA line.
24CXX2 does not feature the watchdog timer function.
PIN CONFIGURATION
24CXX1/XX2*
DC
RESET
WP
VSS
VCC
RESET
SCL
SDA
BLOCK DIAGRAM
EXTERNAL LOAD
VCC
VSS
DOUT
ACK
WORD ADDRESS
BUFFERS
SENSE AMPS
SHIFT REGISTERS
COLUMN
DECODERS
*All products offered in P and J packages
PIN FUNCTIONS
Pin Name
SDA
RESET/RESET
SCL
Vcc
DC
VSS
WP
Function
Serial Data/Address
Reset I/O
Clock Input
Power Supply
Do Not Connect
Ground
Write Protect
SDA
WP
START/STOP
LOGIC
CONTROL
LOGIC
XDEC
E2PROM
Only for
24C161
RESET Controller
High
Precision
WATCHDOG
Vcc Monitor
DATA IN STORAGE
HIGH VOLTAGE/
TIMING CONTROL
STATE COUNTERS
SLAVE
ADDRESS
COMPARATORS
SCL
© 1998 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
RESET/RESET
24C1601 BLOCK
Doc. No. 25079-00 1/98 M-1
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