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CAT1161J-25TE13 Datasheet دیتاشیت PDF دانلود

دیتاشیت - Catalyst Semiconductor - Supervisory Circuits with I2C Serial CMOS EEPROM/ Precision Reset Controller and Watchdog Timer

شماره قطعه CAT1161J-25TE13
شرح مفصل Supervisory Circuits with I2C Serial CMOS EEPROM/ Precision Reset Controller and Watchdog Timer
تولید کننده Catalyst Semiconductor 
آرم Catalyst Semiconductor 


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CAT1161J-25TE13 شرح
CAT1161/2 (16K)
Supervisory Circuits with I2C Serial CMOS EEPROM, Precision Reset Controller and Watchdog Timer
FEATURES
s Watchdog monitors SDA signal (CAT1161)
s 400kHz I2C bus compatible
s 2.7V to 6.0V operation
s Low power CMOS technology
s 16-Byte page write buffer
s Built-in inadvertent write protection
— V lock out
CC
— Write protect pin, WP
s Active high or low reset
— Precision power supply voltage monitor
— 5V, 3.3V and 3V systems
— Five threshold voltage options
s 1,000,000 Program/Erase cycles
s Manual Reset
s 100 Year data retention
s 8-pin DIP or 8-pin SOIC
s Commercial and industrial temperature ranges
DESCRIPTION
The CAT1161/2 is a complete memory and supervisory
solution for microcontroller-based systems. A serial
EEPROM memory (16K) with hardware memory write
protection, a system power supervisor with brown out
protection and a watchdog timer are integrated together
in low power CMOS technology. Memory interface is via
an I2C bus.
The 1.6-second watchdog circuit returns a system to a
known good state if a software or hardware glitch halts
or “hangs” the system. The CAT1161 watchdog monitors
the SDA line, making an additional PC board trace
unnecessary. The lower cost CAT1162 does not have a
watchdog timer.
voltages support 5V, 3.3V and 3V systems. If power supply
voltages are out of tolerance reset signals become active,
preventing the system microcontroller, ASIC or peripherals
from operating. Reset signals become inactive typically 200
ms after the supply voltage exceeds the reset threshold
level. With both active high and low reset signals, interface
to microcontrollers and other ICs is simple. In addition, a
reset pin can be used as a debounced input for push-button
manual reset capability.
The CAT1161/2 memory features a 16-byte page. In addition,
hardware data protection is provided by a write protect pin
WP and by a VCC sense circuit that prevents writes to
memory whenever VCC falls below the reset threshold or
until VCC reaches the reset threshold during power up.
The power supply monitor and reset circuit protects Available packages include an 8-pin DIP and a surface
memory and system controllers during power up/down mount, 8-pin SO package.
and against brownout conditions. Five reset threshold
PIN CONFIGURATION
DC
RESET
WP
GND
CAT1161/2
VCC
RESET
SCL
SDA
DC = Do not connect
Part Dash Minimum Maximum
Number Threshold Threshold
-45 4.50 4.75
-42 4.25 4.50
-30 3.00 3.15
-28 2.85 3.00
-25 2.55 2.70
© 2002 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
BLOCK DIAGRAM
EXTERNAL LOAD
VCC
GND
DOUT
ACK
WORD ADDRESS
BUFFERS
SENSE AMPS
SHIFT REGISTERS
COLUMN
DECODERS
SDA
WP
START/STOP
LOGIC
CONTROL
LOGIC
XDEC
16K
EEPROM
Only for
CAT1161
RESET Controller
Precision
WATCHDOG
Vcc Monitor
DATA IN STORAGE
HIGH VOLTAGE/
TIMING CONTROL
STATE COUNTERS
SLAVE
ADDRESS
COMPARATORS
SCL
RESET RESET
Doc No. 3002, Rev. D

قانون اساسیصفحه 12
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دیتاشیت توصیه

شماره قطعه شرح مفصل تولید کنندگان
CAT1161J-25TE13 Supervisory Circuits with I2C Serial CMOS EEPROM/ Precision Reset Controller and Watchdog Timer Catalyst Semiconductor
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