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ASM1810 Datasheet(PDF) 1 Page - Alliance Semiconductor Corporation

Part No. ASM1810
Description  Low Power, 5V uP Reset Active LOW, Push-Pull Output
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Maker  ALSC [Alliance Semiconductor Corporation]
Homepage  http://www.alsc.com
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ASM1810 Datasheet(HTML) 1 Page - Alliance Semiconductor Corporation

   
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ASM1810
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
February 2005
rev 1.4
Low Power, 5V µP Reset
- Active LOW, Push-Pull Output
General Description
The ASM1810 is a voltage supervisor with low-power, 5V µP
active LOW Reset, Push-Pull output. Maximum supply current
over temperature is a low 20µA.
The ASM1810 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 15%. 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 ASM1810 is designed with a push-pull output stage and
operates over the extended industrial temperature range.
Devices are available in low cost TO-92 and compact surface
mount SOT-23 packages.
Other low power products in this family include the ASM1811/
12/15/16/17, ASM1233D and ASM1233M.
Typical Operating Circuit
Key Features
Low Supply Current
•20 µA maximum (5.5 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
Low cost TO-92 and compact surface mount SOT-23 pack-
age
Push-Pull output for minimum current drain
Operating temperature -40°C to +85°C
Applications
Set-top boxes
Cellular phones
•PDAs
Energy management systems
Embedded control systems
Printers
Single board computers
Block Diagram
Microprocessor
VCC
RESET
RESET
GND
ASM1810
ASM1810
VCC
RESET
Supply
Reference
Delay
150ms
Typical
Tolerance
Bias
+
-
2
ASM1810
VCC
Supply
Delay
150ms
Typical
Tolerance
Bias
-
GND
RESET
Reference
+
1
3


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