ASM1233M-3 ALSC [Alliance Semiconductor Corporation], ASM1233M-3 Datasheet

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ASM1233M-3

Manufacturer Part Number
ASM1233M-3
Description
Low Power, 5V/3.0V, uP Reset, Active LOW, Open-Drain Output
Manufacturer
ALSC [Alliance Semiconductor Corporation]
Datasheet
October 2003
rev 1.0
General Description
The ASM1233M is a voltage supervisor with low-power, 5V µP
Reset, with an active LOW, open-drain output. Maximum supply
current over temperature is a low 20µA.
The ASM1233M generates an active LOW reset signal
whenever the monitored supply is out of tolerance. A precision
reference and comparator circuit monitor power supply (V
level. Tolerance level options are 5% ,and 10% for a 5V power
supply. The tolerance is 15% for the 3.3V, ASM1233M. When
an out-of-tolerance condition is detected, an internal power-fail
signal is generated which forces an active LOW reset signal.
After V
remains active for 350ms to allow the power supply and system
microprocessor to stabilize.
The ASM1233M is designed with a open-drain output stage and
operates over the extended industrial temperature range.
Devices are available in compact surface mount SO-8
packages and 3-lead TO-92 packages.
Other low power products in this family include the ASM1810/
11/12/15/16/17 and ASM1233D.
Key Features
Low Supply Current
•20 µA maximum (5.5 V)
•15µA maximum (3.6 V)
Automatically restarts a microprocessor after power failure
350ms reset delay after V
dition
Active LOW power-up reset, 5kΩ internal pull-up
Precision temperature-compensated voltage reference and
comparator
Eliminates external components
Low-cost TO-92 package
Compact surface mount SO-8 package
Operating temperature -40°C to +85°C
CC
returns to an in-tolerance condition, the reset signal
2575 Augustine Drive . Santa Clara, CA 95054 . Tel: 408.855.4900 . Fax: 408.855.4999 . www.alsc.com
Low Power, 5V/3.0V, 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-
Alliance Semiconductor
CC
)
Applications
Typical Operating Circuit
Block Diagram
Set-top boxes
Cellular phones
PDAs
Energy management systems
Embedded control systems
Printers
Single board computers
Reference
Tolerance
Supply
V
Bias
CC
ASM1233M
2
V
GND
CC
RESET
+
+
-
-
Typical
Typical
150ms
150ms
Delay
Delay
Microprocessor
ASM1233M
RESET
GND
4
5.0kΩ
ASM1233M
1
RESET

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ASM1233M-3 Summary of contents

Page 1

... October 2003 rev 1.0 Low Power, 5V/3.0V, µP Reset, Active LOW, Open-Drain Output General Description The ASM1233M is a voltage supervisor with low-power, 5V µP Reset, with an active LOW, open-drain output. Maximum supply current over temperature is a low 20µA. The ASM1233M generates an active LOW reset signal whenever the monitored supply is out of tolerance ...

Page 2

... See Ordering Information Low Power, 5V/3.0V, µP Reset, Active LOW, Open-Drain Output Notice: The information in this document is subject to change without notice TO-92* NC ASM1233M Pin Name Description RESET Active LOW reset output V Power supply input Connection. GND Ground. ASM1233M ...

Page 3

... October 2003 rev 1.0 Application Information Operation - Power Monitor The ASM1233M detects out-of-tolerance power supply conditions. It resets a processor during power-up, power- down and generates a reset to the system processor when the monitored power supply voltage is below the reset threshold. When an out-of-tolerance V CC the RESET signal is asserted ...

Page 4

... NOTE: These are stress ratings only and functional use is not implied. Exposure to absolute maximum rat- ings for prolonged periods of time may affect device reliability. Low Power, 5V/3.0V, µP Reset, Active LOW, Open-Drain Output Notice: The information in this document is subject to change without notice Min Max Unit - -40 85 °C 260 °C -55 125 °C ASM1233M ...

Page 5

... Supply Voltage V Output Voltage Output Current Operating Current Operating Current V Trip Point (ASM1233M- Trip Point (ASM1233M-55 Trip Point (ASM1233M- Voltage High Trip Level V ASM1233M-5 ASM1233M-55 Voltage Low Trip Level V ASM1233M-5 ASM1233M-55 Voltage High Trip Level V ASM1233M-3 Internal Pull-up Resistor ...

Page 6

... 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 ASM1233M RESET Polarity LOW LOW HIGH LOW LOW HIGH LOW LOW ...

Page 7

... Notice: The information in this document is subject to change without notice Millimeters Max 1.75 0.25 A 0.51 B 0.25 C 1.27 D 4.00 E 6.20 F 1. ASM1233M TO-92 (3-Pin Section A Bottom View Inches Millimeters Min Max Min Plastic SO-8 (8-Pin) TO-92* (3-Pin) 0.175 0.195 4.45 0.170 0.192 4.32 0.500 0.610 12.70 0.016 0.022 0.406 0.095 0.105 2.41 0.045 0.60 1.14 ...

Page 8

... Ordering Information RESET Part Number Output Voltage (V) ASM1233M-55 4.625 ASM1233M-5 4.375 ASM1233M-3 2.720 ASM1233MS-55 4.625 ASM1233MS-5 4.375 ASM1233MS-3 2.720 * Add /S to Part Number for straight (unformed) leads. (i.e. ASM1233xx-x/S) ** Internal 5kΩ resistor pull-up Low Power, 5V/3.0V, µP Reset, Active LOW, Open-Drain Output ...

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. ASM1233M Copyright © Alliance Semiconductor All Rights Reserved Part Number: ASM1233M Document Version: 1.0 ...

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