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ASM1816 Datasheet(PDF) 1 Page - Alliance Semiconductor Corporation

Part No. ASM1816
Description  Low Power 3.3V/3.0V uP Reset, Active LOW, Open-Drain Output
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Maker  ALSC [Alliance Semiconductor Corporation]
Homepage  http://www.alsc.com
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ASM1816 Datasheet(HTML) 1 Page - Alliance Semiconductor Corporation

   
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ASM1816
Alliance Semiconductor
2575 Augustine Drive . Santa Clara, CA 95054 . Tel: 408.855.4900 . Fax: 408.855.4999 . www.alsc.com
Notice: The information in this document is subject to change without notice
rev 1.4
Low Power 3.3V/3.0V µP Reset, Active LOW, Open-Drain Output
February 2005
General Description
The ASM1816 is a voltage supervisory device with low-power,
3.3V/3V µP Reset, active LOW, open-drain output. Maximum
supply current over temperature is a low 15µA (at 3.6V).
The ASM1816 generates an active LOW reset signal whenever
the monitored supply is out of tolerance. A precision reference
and comparator circuit monitor power supply (VCC) level.
Tolerance level options are 5%, 10% and 20%. When an out-of-
tolerance condition is detected, an internal power-fail signal is
generated which forces an active LOW reset signal. After VCC
returns to an in-tolerance condition, the reset signal remains
active for 150ms to allow the power supply and system
microprocessor to stabilize.
The ASM1816 is designed with a open-drain output stage and
operates over the extended industrial temperature range.
Devices are available in TO-92 and compact surface mount
SOT-23 packages.
Other low power products in this family include the ASM1810/
11/12/15/17, ASM1233D and ASM1233M.
Key Features
Low Supply Current
•20 µA maximum (5.5 V)
•15µA maximum (3.6 V)
Automatically restarts a microprocessor after power failure
150ms reset delay after VCC returns to an in-tolerance con-
dition
Active LOW power-up reset
Precision temperature-compensated voltage reference and
comparator
Eliminates external components
TO-92 and compact surface mount SOT-23 package
Operating temperature -40°C to +85°C
Applications
Set-top boxes
Cellular phones
•PDAs
Energy management systems
Embedded control systems
Printers
Single board computers
Typical Application
Block Diagram
Microprocessor
VCC
RESET
RESET
GND
ASM1816
VCC
Supply
Reference
Delay
150ms
Typical
Tolerance
Bias
+
-
2
ASM1816
VCC
Supply
Delay
150ms
Typical
Tolerance
Bias
-
GND
RESET
Reference
+
1
3
5.0K


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