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CAT1021LI-28T2 参数 Datasheet PDF下载

CAT1021LI-28T2图片预览
型号: CAT1021LI-28T2
PDF下载: 下载PDF文件 查看货源
内容描述: 监控电路,带有I2C串行2K位CMOS EEPROM ,手动复位及看门狗定时器 [Supervisory Circuits with I2C Serial 2k-bit CMOS EEPROM, Manual Reset and Watchdog Timer]
分类和应用: 监控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
文件页数/大小: 21 页 / 278 K
品牌: CATALYST [ CATALYST SEMICONDUCTOR ]
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CAT1021, CAT1022, CAT1023  
PIN FUNCTION  
PIN DESCRIPTION  
¯¯¯¯¯¯  
(RESET CAT1021/23 Only)  
These are open drain pins and RESET can be used  
as a manual reset trigger input. By forcing a reset  
condition on the pin the device will initiate and  
maintain a reset condition. The RESET pin must be  
connected through a pull-down resistor, and the  
RESET/RESET: RESET OUTPUT  
Pin  
Name  
Function  
¯¯¯¯¯¯  
NC  
No Connect  
¯¯¯¯¯¯  
RESET  
Active Low Reset Input/Output  
Ground  
VSS  
SDA  
SCL  
Serial Data/Address  
Clock Input  
¯¯¯¯¯¯  
resistor.  
RESET pin must be connected through a pull-up  
RESET Active High Reset Output (CAT1021/23)  
SDA: SERIAL DATA ADDRESS  
VCC  
WP  
Power Supply  
The bidirectional serial data/address pin is used to  
transfer all data into and out of the device. The SDA  
pin is an open drain output and can be wire-ORed  
with other open drain or open collector outputs.  
Write Protect (CAT1021 only)  
Manual Reset Input  
¯¯¯  
MR  
WDI  
Watchdog Timer Interrupt (CAT1023)  
SCL: SERIAL CLOCK  
Serial clock input.  
OPERATING TEMPERATURE RANGE  
¯¯¯  
MR: MANUAL RESET INPUT  
Manual Reset input is a debounced input that can be  
connected to an external source for Manual Reset.  
Pulling the MR input low will generate a Reset  
condition. Reset outputs are active while MR input is  
low and for the reset timeout period after MR returns  
to high. The input has an internal pull up resistor.  
Industrial  
-40ºC to 85ºC  
Extended -40ºC to 125ºC  
WP (CAT1021 Only): WRITE PROTECT INPUT  
When WP input is tied to VSS or left unconnected write  
operations to the entire array are allowed. When tied  
to VCC, the entire array is protected. This input has an  
internal pull down resistor.  
WDI (CAT1023 Only): WATCHDOG TIMER INTERRUPT  
Watchdog Timer Interrupt Input is used to reset the  
watchdog timer. If a transition from high to low or low  
to high does not occur every 1.6 seconds, the RESET  
outputs will be driven active.  
CAT102X FAMILY OVERVIEW  
Manual  
Reset  
Input Pin  
Watchdog  
Monitor  
Pin  
Write  
Protection  
Pin  
Independent  
Auxiliary  
Voltage Sense  
RESET:  
Active High  
and LOW  
Device  
Watchdog  
EEPROM  
CAT1021  
CAT1022  
CAT1023  
CAT1024  
CAT1025  
CAT1026  
CAT1027  
SDA  
SDA  
WDI  
2k  
2k  
2k  
2k  
2k  
2k  
2k  
ꢁ ꢁ  
ꢁ ꢁ  
ꢁ ꢁ  
ꢁ ꢁ  
ꢁ ꢁ  
WDI  
For supervisory circuits with embedded 16k EEPROM, please refer to the CAT1161, CAT1162 and CAT1163  
data sheets.  
© 2007 Catalyst Semiconductor, Inc.  
Characteristics subject to change without notice  
3
Doc. No. 3009 Rev. L  
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