asm1811-5t Alliance Memory, Inc, asm1811-5t Datasheet

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asm1811-5t

Manufacturer Part Number
asm1811-5t
Description
Power Reset Active Open Drain Output
Manufacturer
Alliance Memory, Inc
Datasheet
February 2005
rev 1.4
General Description
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 (V
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 V
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.
Other low power products in this family include the ASM1810/
12/15/16/17, ASM1233D and ASM1233M.
Key Features
Low Supply Current
•20 µA maximum (5.5 V)
Automatically restarts a microprocessor after power failure
150ms reset delay after V
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
2575 Augustine Drive . Santa Clara, CA 95054 . Tel: 408.855.4900 . Fax: 408.855.4999 . www.alsc.com
Low Power 5V µP Reset Active LOW, Open - Drain Output
CC
Notice: The information in this document is subject to change without notice
returns to an in-tolerance con-
CC
) level.
Alliance Semiconductor
CC
Applications
Typical Operating Circuit
Block Diagram
V
V
Reference
Reference
Set-top boxes
Cellular phones
PDAs
Energy management systems
Embedded control systems
Printers
Single board computers
Tolerance
Tolerance
CC
CC
Supply
Supply
Bias
Bias
2
ASM1811
+
+
-
-
V
GND
CC
RESET
ASM1811
Typical
Typical
150ms
150ms
Delay
Delay
GND
3
Microprocessor
RESET
5.5K
ASM1811
1
RESET

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asm1811-5t Summary of contents

Page 1

... Low Power 5V µP Reset Active LOW, Open - Drain Output General Description 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 ...

Page 2

... CC Pin Description SOT-23 TO-92 Pin # Pin # Notice: The information in this document is subject to change without notice GND 3 Pin Name RESET V CC GND Low Power 5V µP Reset ASM1811 TO-92 ASM1811 Description Active LOW reset output Power supply input Ground ...

Page 3

... February 2005 rev 1.4 Application Information Operation - Power Monitor The ASM1811 detects out-of-tolerance power supply conditions. It resets a processor during power-up, power- down and issues a reset to the system processor when the monitored power supply voltage is below the reset threshold. When an out-of-tolerance V ...

Page 4

... Parameter Symbol V Supply Voltage I Operating Current CC V Trip Point (ASM1811R- CCTP V Trip Point (ASM1811R-10 CCTP V Trip Point (ASM1811R-15 CCTP R Internal Pull-up Resistor C Output Capacitance OUT t RESET Active Time RESET V Detect to RESET Low t CC RPD V Slew Rate ...

Page 5

... Notice: The information in this document is subject to change without notice RESET Time Output Stage (ms) 150 Push-Pull 150 Open-Drain 150 Push-Pull 150 Push-Pull 150 Open-Drain 150 Push-Pull 350 Open-Drain 350 Open-Drain Low Power 5V µP Reset ASM1811 RESET Polarity LOW LOW HIGH LOW LOW HIGH LOW LOW ...

Page 6

... BSC e1 0.075 BSC H 0.083 0.104 L 0.016 0.024 Notice: The information in this document is subject to change without notice Plastic SOT-23 (3-Pin Millimeters Min Max 0.75 1.17 0.05 0.15 0.30 0.50 0.08 0.20 2.80 3.04 1.20 1.40 0.95 BSC 1.9 BSC 2.10 2.64 0.40 0. Low Power 5V µP Reset ASM1811 ...

Page 7

... Notice: The information in this document is subject to change without notice To-92 (3-Pin) Dimensions in Millimeters Min Max 4.445 4.699 0.406 0.508 0.356 0.406 4.445 4.699 3.505 3.658 2.489 2.591 1.143 1.397 4.269 4.420 12.7 14.86 2.413 2.515 Low Power 5V µP Reset ASM1811 ...

Page 8

... Low Power 5V µP Reset ASM1811 SOT-23 RESET Package Package Polarity Marking LOW RDLL LOW RELL LOW RFLL LOW KDLL LOW KELL LOW KFLL TO-92 RESET Package Package Polarity Marking LOW ASM1811-5 LOW ASM1811-10 LOW ASM1811-15 LOW ASM1811-5F LOW ASM1811-10F LOW ASM1811-15F ...

Page 9

... Alliance products in such life-supporting systems implies that the manufacturer assumes all risk of such use and agrees to indemnify Alliance against all claims arising from such use. ASM1811 Copyright © Alliance Semiconductor All Rights Reserved Part Number: ASM1811 Document Version: 1.4 ...

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