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ASM161

更新时间: 2024-11-24 06:38:07
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PULSECORE 监控
页数 文件大小 规格书
9页 184K
描述
μP Supervisory Circuit

ASM161 数据手册

 浏览型号ASM161的Datasheet PDF文件第2页浏览型号ASM161的Datasheet PDF文件第3页浏览型号ASM161的Datasheet PDF文件第4页浏览型号ASM161的Datasheet PDF文件第5页浏览型号ASM161的Datasheet PDF文件第6页浏览型号ASM161的Datasheet PDF文件第7页 
April 2008  
rev 1.5  
ASM161/ASM162  
µP Supervisory Circuit  
General Description  
Reset Threshold  
The ASM161 and ASM162 are cost effective, low power  
supervisory circuits that monitor power supplies in  
microprocessor, microcontroller and digital systems. If the  
power supply drops below the reset threshold level, a  
reset is asserted and remains asserted for atleast 800ms  
after VCC has risen above the reset threshold. An  
improved manual reset architecture gives the system  
designer additional flexibility.  
Part Suffix  
Voltage (V)  
L
4.63  
4.38  
4.00  
3.08  
2.93  
2.63  
M
J
T
S
R
The debounced manual reset input is negative edge  
triggered. The reset pulse period generated by a MR  
transition is a minimum of 800 ms and a maximum of  
2 sec duration. In addition, The MR input signal is  
blocked for an additional 49µS minimum after the reset  
pulse ends. During the MR disable period, the  
microcontroller is guaranteed a time period free of  
additional manual reset signals. During this period DRAM  
contents can be refreshed or other critical system tasks  
undertaken. Low power consumption makes the  
ASM161/162 ideal for use in portable and battery  
operated equipments. With 3V supplies power  
consumption is 8µW typically and 30µW maximum. The  
ASM161 has an open-drain, active-LOW RESET output  
and requires an external pull-up resistor. The ASM162  
has an active HIGH RESET output.  
Key Features  
• Edge triggered manual reset input  
• single pulse output  
• 49µS minimum MR disable period after reset  
• CMOS/TTL logic or switch interface  
• Debounced input  
• Low supply current extends battery life  
6µA / 15µA typ/max at 5.5V  
4.5µA / 10µA typ/max at 3.6V  
• Long reset period  
• 0.8 sec minimum, 2 sec maximum  
• Two reset polarity options  
ASM161: Active LOW, open-drain  
ASM162: Active HIGH  
• Pinout matches the ASM811/812  
• Small 4-Pin SOT-143 package  
• Two temperature ranges: 0°c to 70°c and -40°c to +85°c  
The ASM161/162 are offered in compact 4-pin SOT-143  
packages. No external components are required to trim  
threshold voltage for monitoring different supply voltages.  
With six different factory set, reset, threshold ranges from  
2.63V to 4.63V, the ASM161/162 are suitable for  
monitoring 5V, 3.6V and 3.0V supplies. The ASM161/162  
are available in temperature ranges 0°c to 70°c and -40°c  
to +85°c.  
Applications  
• PDAs  
• Appliances  
• Computers and embedded controllers  
• Wireless communication systems  
• Battery operated and intelligent instruments  
• Automotive systems  
• Safety systems  
PulseCore Semiconductor Corporation  
1715 S. Bascom Ave Suite 200 Campbell, CA 95008 Tel: 408-879-9077 Fax: 408-879-9018  
www.pulsecoresemi.com  
Notice: The information in this document is subject to change without notice.  

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