CAT93C8621 Datasheet PDF - Catalyst Semiconductor
| Part Number | CAT93C8621 | |
| Description | Supervisory Circuits with Microwire Serial CMOS E2PROM/ Precision Reset Controller and Watchdog Timer | |
| Manufacturers | Catalyst Semiconductor | |
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Advanced Information
CAT93CXXXX (1K-16K)
Supervisory Circuits with Microwire Serial CMOS E2PROM, Precision Reset Controller and Watchdog Timer
FEATURES
s Watchdog Timer
s Programmable Reset Threshold
s Built-in Inadvertent Write Protection
—VCC 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
DESCRIPTION
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
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
93CX61X
93CX62X
93CX63X
CS 1
SK 2
DI 3
DO 4
8 VCC
CS 1
7 RESET(RESET) SK 2
6 ORG
DI 3
5 GND
DO 4
8 VCC
CS 1
7 RESET(RESET) SK 2
6 WDI
DI 3
5 GND
DO 4
8 VCC
7 RESET
6 RESET
5 GND
VCC
GND
PIN FUNCTIONS
ORG
MEMORY ARRAY
Pin Name
Function
CS
RESET/RESET
SK
DI
DO
Chip Select
Reset I/O
Clock Input
Serial Data Input
Serial Data Output
DATA
REGISTER
DI
MODE DECODE
CS LOGIC
VCC
GND
+2.7 to 6.0V Power Supply
Ground
CLOCK
SK GENERATOR
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.
ADDRESS
DECODER
OUTPUT
BUFFER
DO
RESET Controller
High
Precision
WATCHDOG
Vcc Monitor
WDI RESET/RESET
© 1998 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
9-85
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Advanced Information
RESET CIRCUIT CHARACTERISTICS
Symbol
tGLITCH
VRT
VOLRS
VOHRS
VTH
tPURST
tRPD
VRVALID
Parameter
Min. Max.
Glitch Reject Pulse Width
100
Reset Threshold Hystersis
15
Reset Output Low Voltage (IOLRS=1mA)
0.4
Reset Output High Voltage
Vcc-0.75
Reset Threshold (Vcc=5V)
(93CXXXX-45)
4.50 4.75
Reset Threshold (Vcc=5V)
(93CXXXX-42)
4.25 4.50
Reset Threshold (Vcc=3.3V)
(93CXXXX-30)
3.00 3.15
Reset Threshold (Vcc=3.3V)
(93CXXXX-28)
2.85 3.00
Reset Threshold (Vcc=3V)
(93CXXXX-25)
2.55 2.70
Power-Up Reset Timeout
130 270
VTH to RESET Output Delay
5
RESET Output Valid
1
Units
ns
mV
V
V
V
ms
µs
V
Figure 1. RESET Output Timing
t
GLITCH
VTH
VRVALID
VCC
tPURST
t RPD
tPURST
CAT93CXXXX
RESET
t RPD
RESET
9-89
Stock No. 21084-01 2/98
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for CAT93C8621 electronic component. |
| Information | Total 10 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ CAT93C8621.PDF Datasheet ] | |
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