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MIC1832 PDF预览

MIC1832

更新时间: 2024-11-29 14:55:43
品牌 Logo 应用领域
美国微芯 - MICROCHIP /
页数 文件大小 规格书
7页 174K
描述
The MIC1832 is a multifunction circuit which monitors microprocessor activity, external reset and

MIC1832 数据手册

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MIC1832  
3.3V Voltage Supervisor with Manual Reset,  
Watchdog Timer and Dual Reset Outputs  
General Description  
Features  
The MIC1832 is a low-current microprocessor supervisor  
for monitoring 3.3V and 3V systems. The device features  
logic-selectable (TOL) reset thresholds of 10% or 20% of  
3.3V; a pushbutton reset input; a watchdog timer with  
three-state selectable (TD) timeout periods of 150ms,  
600ms, or 1.2s; a fixed reset timeout period of 250ms  
(min); and active-low open-drain reset (/RST) and active-  
high push-pull reset (RST) outputs. The /RST output  
maintains a valid reset condition for VCC as low as 1.4V.  
Low-current version of DS1832  
Low current: 15µA (typ), 25µA (max)  
Selectable threshold (TOL): 10% or 20% of 3.3V  
Selectable watchdog timer (TD): 150ms, 600ms, 1.2s  
Power OK/Reset time delay: 250ms (min)  
Debounced pushbutton reset input  
Dual complementary reset outputs  
o Active-low, open-drain reset output  
The MIC1832 asserts a reset condition if the supply  
voltage drops below the reset threshold, the pushbutton  
reset is asserted low, or the watchdog timer does not see  
a high-to-low transition on the watchdog timer input within  
the watchdog timer period. A reset condition is held for the  
reset timeout period of 250ms (min) after the pushbutton  
input is released, after the supply voltage increases above  
the reset threshold voltage, or after the watchdog has  
initiated a reset.  
o Active-high, push-pull reset output  
Available in Pb-Free 8-pin SOIC and PDIP packages  
–40°C to +85°C temperature range  
Pin-for-Pin compatible with MIC1232/DS1232/CAT1232  
Applications  
Automotive systems  
Intelligent systems  
Critical microprocessor power monitoring  
Battery powered computers  
Controllers  
The MIC1832 is a drop-in replacement for the DS1832. It  
operates over the –40°C to +85°C temperature range and  
is available in Pb-Free 8-pin SOIC and PDIP packages.  
Data sheets and support documentation can be found on  
Micrel’s web site at: www.micrel.com.  
_________________________________________________________________________________________________________________________  
Typical Application  
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 http://www.micrel.com  
M9999-020413  
February 2013  

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