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PDF ASM1811 Data sheet ( Hoja de datos )
| Número de pieza | ASM1811 | |
| Descripción | Low Power 5V uP Reset Active LOW | |
| Fabricantes | Alliance Semiconductor | |
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February 2005
ASM1811
rev 1.4
Low Power 5V µP Reset Active LOW, Open - Drain Output
General Description
Applications
The ASM1811 is a voltage supervisory device with a low-power,
5V µP Reset, active LOW, open-drain output. Maximum supply
current over temperature is a low 20µA.
The ASM1811 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 ASM1811 is designed with a open-drain 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.
• Set-top boxes
• Cellular phones
• PDAs
• Energy management systems
• Embedded control systems
• Printers
• Single board computers
Typical Operating Circuit
VCC
ASM1811
RESET
Microprocessor
RESET
Other low power products in this family include the ASM1810/
12/15/16/17, ASM1233D and ASM1233M.
GND
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-
ages
• Operating temperature -40°C to +85°C
Block Diagram
VCC 2
Supply
ToBleiarasnce
+
-
Reference
ASM1811 5.5KΩ
Delay
150ms
Typical
3
GND
1
RESET
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
1 page  
February 2005
rev 1.4
Family Selection Guide
ASM1811
Part #
ASM1810
ASM1811
ASM1812
ASM1815
ASM1816
ASM1817
ASM1233D
ASM1233M
RESET Voltage (V)
4.620, 4.370, 4.120
4.620, 4.350, 4.130
4.620, 4.350, 4.130
3.060, 2.880, 2.550
3.060, 2.880, 2.550
3.060, 2.880, 2.550
4.625, 4.375, 4.125
4.625, 4.375, 2.720
RESET Time
(ms)
150
150
150
150
150
150
350
350
Output Stage
Push-Pull
Open-Drain
Push-Pull
Push-Pull
Open-Drain
Push-Pull
Open-Drain
Open-Drain
RESET Polarity
LOW
LOW
HIGH
LOW
LOW
HIGH
LOW
LOW
Low Power 5V µP Reset
Notice: The information in this document is subject to change without notice
5 of 9
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| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet ASM1811.PDF ] | |
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