datasheetbank_Logo
Integrated circuits, Transistor, Semiconductors Search and Datasheet PDF Download Site

24C321 View Datasheet(PDF) - Catalyst Semiconductor => Onsemi

Part Name
Description
View to exact match
24C321 Datasheet PDF : 12 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
Advanced
CAT24C321/322(32K), CAT24C641/642(64K)
Supervisory Circuits with I2C Serial CMOS E2PROM, Precision Reset Controller and Watchdog Timer
FEATURES
s Watchdog Timer on SDA for 24C321/641
s Programmable Reset Threshold
s 400 KHz I2C Bus Compatible
s 2.7 to 6 Volt Operation
s Low Power CMOS Technology
s 32 - Byte Page Write Buffer
s Built-in inadvertent write protection
— VCC Lock Out
DESCRIPTION
The CAT24CXXX is a single chip solution to three
popular functions of EEPROM memory, precision reset
controller and watchdog timer. The 24C321/322(32K)
and 24C641/642(64K) feature a I2C Serial CMOS
EEPROM. Catalyst's advanced CMOS technology sub-
stantially reduces device power requirements. The
24CXXX features a 32-byte page and is available in 8-pin
DIP or 8-pin SOIC packages.
PIN CONFIGURATION
24C321/322*
24C641/642*
DC
RESET
WP
VSS
VCC
RESET
SCL
SDA
*All products offered in P and J packages
PIN FUNCITONS
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
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
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.
24C321/641 features watchdog timer on the SDA line.
24C322/642 does not feature the watchdog timer func-
tion.
BLOCK DIAGRAM
EXTERNAL LOAD
VCC
VSS
DOUT
ACK
WORD ADDRESS
BUFFERS
SENSE AMPS
SHIFT REGISTERS
COLUMN
DECODERS
SDA
START/STOP
LOGIC
XDEC
E2PROM
CONTROL
WP
LOGIC
Only for
24C321/641
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
9-1
RESET/RESET
24C1601 BLOCK
Doc. No. 25083-00 12/98
 

Share Link: 

datasheetbank.com [ Privacy Policy ] [ Request Datasheet ] [ Contact Us ]