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CAT93CXXXX Datasheet(PDF) 1 Page - Catalyst Semiconductor

Part No. CAT93CXXXX
Description  Supervisory Circuits with Microwire Serial CMOS E2PROM, Precision Reset Controller and Watchdog Timer
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Maker  CATALYST [Catalyst Semiconductor]
Homepage  http://www.catalyst-semiconductor.com
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CAT93CXXXX Datasheet(HTML) 1 Page - Catalyst Semiconductor

 
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CAT93CXXXX (1K-16K)
Supervisory Circuits with Microwire Serial CMOS E2PROM, Precision Reset Controller and Watchdog Timer
DESCRIPTION
The CAT93CXXXX is a single chip solution to three
popular functions of EEPROM memory, precision reset
controller and watchdog timer. The serial EEPROM
memory of the 93CXXXX can be configured either by 16-
bits or by 8-bits. Each register can be written (or read)
by using the DI (or DO pin).
The reset function of the 93CXXXX 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. Catalyst's advanced
CMOS technology substantially reduces device power
requirements. The 93CXXXX is available in 8-pin DIP, 8-
pin TSSOP or 8-pin SOIC packages. It is designed to
endure 1,000,000 program/erase cycles and has a data
retention of 100 years.
PIN CONFIGURATION
BLOCK DIAGRAM
PIN FUNCTIONS
Pin Name
Function
CS
Chip Select
RESET/
RESET
Reset I/O
SK
Clock Input
DI
Serial Data Input
DO
Serial Data Output
VCC
+2.7 to 6.0V Power Supply
GND
Ground
ORG
Memory Organization
Note: When the ORG pin is connected to VCC, the X16 organiza
tion is selected. When it is connected to ground, the X8 pin
is selected. If the ORG pin is left unconnected, then an
internal pullup device will select the X16 organization.
93CX61X
93CX62X
93CX63X
FEATURES
s Watchdog Timer
s Programmable Reset Threshold
s Built-in Inadvertent Write Protection
—V
CC Lock Out
s High Speed Operation: 3MHz
s Low Power CMOS Technology
s x 16 or x 8 Selectable Serial Memory
s Self-Timed Write Cycle with Auto-Clear
s Sequential Read
s Fast Nonvolatile Write Cycle: 3ms Max
s Active High or Low Reset Outputs
—Precision Power Supply Voltage Monitoring
—5V, 3.3V and 3V options
s Hardware and Software Write Protection
s Power-Up Inadvertant Write Protection
s 1,000,000 Program/Erase Cycles
s 100 Year Data Retention
s Commercial, Industrial, and Automotive
Temperature Ranges
s 2.7-6.0 Volt Operation
s 16 Byte Page Mode
Advanced Information
CS
SK
DI
DO
VCC
RESET(
RESET)
ORG
GND
1
2
3
4
8
7
6
5
CS
SK
DI
DO
VCC
WDI
GND
1
2
3
4
8
7
6
5
RESET(
RESET)
CS
SK
DI
DO
VCC
RESET
GND
1
2
3
4
8
7
6
5
RESET
VCC
ADDRESS
DECODER
MEMORY ARRAY
DATA
REGISTER
MODE DECODE
LOGIC
CLOCK
GENERATOR
OUTPUT
BUFFER
DO
SK
CS
DI
ORG
GND
RESET Controller
High
Precision
Vcc Monitor
WDI RESET/
RESET
WATCHDOG
© 1998 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice


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