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DS1231S

更新时间： 2024-11-28 22:54:35
品牌 Logo 应用领域
达拉斯 - DALLAS 监控
页数 文件大小 规格书
9页 70K
描述
Power Monitor Chip

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中文翻译

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DS1231S 数据手册

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DS1231/S  
DS1231/S  
Power Monitor Chip  
FEATURES  
PIN ASSIGNMENT  
• Warns processor of an impending power failure  
1
2
3
4
8
7
VCC  
NMI  
IN  
MODE  
TOL  
• Provides time for an orderly shutdown  
• Prevents processor from destroying nonvolatile  
memory during power transients  
RST  
RST  
6
5
GND  
• Automatically restarts processor after power is  
restored  
DS1231 8–Pin DIP  
(300 MIL)  
See Mech. Drawings  
Section  
• Suitable for linear or switching power supplies  
• Adjusts to hold time of the power supply  
NC  
16  
15  
NC  
IN  
1
2
3
VCC  
NC  
• Supplies necessary signals for processor interface  
NC  
14  
13  
MODE  
NMI  
NC  
4
5
• Accurate 5% or 10% V monitoring  
CC  
NC  
12  
6
7
TOL  
• Replaces power-up reset circuitry  
• No external capacitors required  
11  
10  
RST  
NC  
NC  
9
GND  
8
RST  
• Optional 16-pin SOIC surface mount package  
DS1231S 16–Pin SOIC  
(300 MIL)  
See Mech. Drawings  
Section  
PIN DESCRIPTION  
IN  
–
–
–
–
–
–
–
–
–
Input  
MODE  
TOL  
GND  
RST  
RST  
NMI  
Selects input pin characteristics  
Selects 5% or 10% V detect  
Ground  
Reset (Active High)  
Reset (Active Low, open drain)  
Non–Maskable Interrupt  
+5V Supply  
CC  
V
CC  
NC  
No Connections  
DESCRIPTION  
The DS1231 Power Monitor Chip uses a precise tem-  
perature-compensatedreference circuit whichprovides  
an orderly shutdown and an automatic restart of a pro-  
cessor-basedsystem. Asignalwarningofanimpending  
power failure is generated well before regulated DC  
voltages go out of specification by monitoring high volt-  
age inputs to the power supply regulators. If line isola-  
tion is required a UL-approved opto-isolator can be di-  
rectly interfaced to the DS1231. The time for processor  
shutdown is directly proportional to the available  
hold-up time of the power supply. Just before the  
hold-up time is exhausted, the Power Monitor uncondi-  
tionally halts the processor to prevent spurious cycles  
by enabling Reset as V falls below a selectable 5 or  
CC  
10 percent threshold. When power returns, the proces-  
sor is held inactive until well after power conditions have  
stabilized, safeguarding any nonvolatile memory in the  
system from inadvertent data changes.  
022698 1/9  
1234567...9

中文翻译

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与DS1231S相关器件

型号 品牌 获取价格 描述 数据表
DS1231S-20 DALLAS

获取价格

 		Power Supply Supervisor
DS1231S-20 MAXIM

获取价格

 		Power Supply Support Circuit, Fixed, 1 Channel, CMOS, PDSO16, 0.300 INCH, SOIC-16
DS1231S-20 ROCHESTER

获取价格

 		1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16, 0.300 INCH, SOIC-16
DS1231S-20N DALLAS

获取价格

 		Power Supply Support Circuit, Fixed, 1 Channel, PDSO16, 0.300 INCH, SOIC-16
DS1231S-20N+ MAXIM

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 		Power Supply Support Circuit, Fixed, 1 Channel, PDSO16, 0.300 INCH, SOIC-16
DS1231S-35 ROCHESTER

获取价格

 		1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16, 0.300 INCH, SOIC-16
DS1231S-35 DALLAS

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 		Power Supply Supervisor
DS1231S-35/T&R MAXIM

获取价格

 		Power Supply Support Circuit, Fixed, 1 Channel, PDSO16, 0.300 INCH, SOIC-16
DS1231S-35+ MAXIM

获取价格

 		Power Supply Support Circuit, Fixed, 1 Channel, PDSO16, 0.300 INCH, SOIC-16
DS1231S-35+T&R MAXIM

获取价格

 		Power Supply Support Circuit, Fixed, 1 Channel, PDSO16, 0.300 INCH, SOIC-16

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