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CAT1161LI-28-T3

更新时间： 2024-11-23 04:35:39
品牌 Logo 应用领域
CATALYST 监控控制器可编程只读存储器电动程控只读存储器电可擦编程只读存储器
页数 文件大小 规格书
14页 204K
描述
Supervisory Circuits with I2C Serial CMOS EEPROM, Precision Reset Controller and Watchdog Timer (16K)

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CAT1161LI-28-T3 数据手册

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CAT1161, CAT1162  
Supervisory Circuits with I2C Serial CMOS EEPROM,  
Precision Reset Controller and Watchdog Timer (16K)  
brown out protection and a watchdog timer are  
integrated together in low power CMOS technology.  
FEATURES  
Memory interface is via an I2C bus.  
„ Watchdog monitors SDA signal (CAT1161)  
„ 400kHz I2C bus compatible  
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.  
„ 2.7V to 6.0V operation  
„ Low power CMOS technology  
„ 16-Byte page write buffer  
„ Built-in inadvertent write protection  
The power supply monitor and reset circuit protects  
memory and system controllers during power up/down  
and against brownout conditions. Five reset threshold  
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 200ms 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.  
—
—
VCC lock out  
Write protect pin, WP  
„ Active high or low reset  
—
—
—
Precision power supply voltage monitor  
5V, 3.3V and 3V systems  
Five threshold voltage options  
„ 1,000,000 Program/Erase cycles  
„ Manual Reset  
„ 100 Year data retention  
„ 8-pin DIP or 8-pin SOIC  
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.  
„ Commercial and industrial temperature ranges  
For Ordering Information details, see page 13.  
DESCRIPTION  
Available packages include an 8-pin DIP and a  
surface mount, 8-pin SO package.  
The CAT1161/2 is a complete memory and supervi-  
sory solution for microcontroller-based systems. A se-  
rial EEPROM memory (16K) with hardware memory  
write protection, a system power supervisor with  
PIN FUNCTIONS  
PIN CONFIGURATION  
Pin Name Function  
PDIP 8 Lead  
SOIC 8 Lead  
DC  
¯¯¯¯¯¯  
RESET  
Do not Connect  
Active Low Reset I/O  
Write Protect  
DC  
1
2
3
4
8
7
6
5
VCC  
WP  
GND  
SDA  
¯¯¯¯¯¯  
RESET  
RESET  
SCL  
CAT1161  
CAT1162  
Ground  
WP  
Serial Data/Address  
Clock Input  
GND  
SDA  
SCL  
RESET  
VCC  
Active High Reset I/O  
Power Supply  
© Catalyst Semiconductor, Inc.  
Characteristics subject to change without notice  
1
Doc. No. MD-3002 Rev. G  
1234567...14

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