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DS1238

更新时间： 2024-11-13 22:54:35
品牌 Logo 应用领域
达拉斯 - DALLAS /
页数 文件大小 规格书
14页 218K
描述
MicroManager

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中文翻译

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DS1238 数据手册

 浏览型号DS1238的Datasheet PDF文件第2页浏览型号DS1238的Datasheet PDF文件第3页浏览型号DS1238的Datasheet PDF文件第4页浏览型号DS1238的Datasheet PDF文件第5页浏览型号DS1238的Datasheet PDF文件第6页浏览型号DS1238的Datasheet PDF文件第7页 
DS1238  
MicroManager  
www.dalsemi.com  
FEATURES  
PIN ASSIGNMENT  
ꢀ Holds microprocessor in check during power  
transients  
VBAT  
VCCO  
VCC  
1
2
3
4
5
6
7
8
16  
15  
14  
13  
12  
11  
10  
9
RST  
RST  
WDS  
CEI  
CEO  
ST  
ꢀ Halts and restarts an out-of-control  
microprocessor  
ꢀ Warns microprocessor of an impending power  
failure  
ꢀ Converts CMOS SRAM into nonvolatile  
memory  
ꢀ Unconditionally write-protects memory when  
power supply is out of tolerance  
ꢀ Delays write protection until completion of  
the current memory cycle  
VBAT  
VCCO  
VCC  
1
2
3
4
5
6
7
8
16  
15  
14  
13  
12  
11  
10  
9
RST  
RST  
WDS  
CEI  
CEO  
ST  
GND  
PF  
GND  
RVT  
PF  
OSCIN  
OSCSEL  
NMI  
IN  
RVT  
OSCIN  
OSCSEL  
NMI  
IN  
16-Pin DIP (300-mil)  
16-Pin SOIC (300-mil)  
See Mech. Drawings Section  
See Mech. Drawings Section  
ꢀ Consumes less than 200 nA of battery current  
ꢀ Controls external power switch for high  
current applications  
ꢀ Debounces pushbutton reset  
ꢀ Accurate 10% power supply monitoring  
ꢀ Optional 5% power supply monitoring  
designated DS1238-5  
PIN DESCRIPTION  
VBAT  
VCCO  
VCC  
GND  
PF  
- +3-Volt Battery Input  
- Switched SRAM Supply Output  
- +5-Volt Power Supply Input  
- Ground  
ꢀ Provides orderly shutdown in microprocessor  
applications  
- Power-Fail  
RVT  
OSCIN  
OSCSEL  
IN  
- Reset Voltage Threshold  
- Oscillator In  
- Oscillator Select  
- Early Warning Input  
- Non-Maskable Interrupt  
- Strobe Input  
ꢀ Pin-for-pin compatible with MAX691  
ꢀ Standard 16-pin DIP or space-saving 16-pin  
SOIC  
ꢀ Optional industrial temperature range -40°C  
to +85°C  
NMI  
ST  
CEO  
- Chip Enable Output  
- Chip Enable Input  
- Watchdog Status  
- Reset Output (active low)  
- Reset Output (active high)  
CEI  
WDS  
RST  
RST  
DESCRIPTION  
The DS1238 MicroManager provides all the necessary functions for power supply monitoring, reset  
control, and memory backup in microprocessor-based systems. A precise internal voltage reference and  
comparator circuit monitor power supply status. When an out-of-tolerance condition occurs, the  
microprocessor reset and power-fail outputs are forced active, and static RAM control unconditionally  
write protects external memory. The DS1238 also provides early warning detection of a user-defined  
threshold by driving a non-maskable interrupt. External reset control is provided by a pushbutton reset  
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DS1238-10+ MAXIM

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 		Power Supply Management Circuit, Fixed, 2 Channel, PDIP16, 0.300 INCH, DIP-16
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 		Power Supply Management Circuit, Fixed, 2 Channel, PDIP16, 0.300 INCH, DIP-16
DS1238-10N+ MAXIM

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 		Power Supply Management Circuit, Fixed, 2 Channel, PDIP16, 0.300 INCH, DIP-16
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DS1238-5+ ROCHESTER

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 		1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDIP16, 0.300 INCH, DIP-16
DS1238A DALLAS

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 		MicroManager
DS1238A-10 ROCHESTER

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 		1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDIP16, 0.300 INCH, DIP-16
DS1238A-10+ MAXIM

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 		Power Supply Management Circuit, Fixed, 1 Channel, PDIP16, 0.300 INCH, ROHS COMPLIANT, DIP
DS1238A10N ETC

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 		Analog IC
DS1238A-10N MAXIM

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 		Power Supply Management Circuit, Fixed, 1 Channel, PDIP16, 0.300 INCH, DIP-16

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