ASM1233AZ-15 ALSC [Alliance Semiconductor Corporation], ASM1233AZ-15 Datasheet

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ASM1233AZ-15

Manufacturer Part Number
ASM1233AZ-15
Description
Low Power, 3.3V, uP Reset, Active LOW, Open-Drain Output
Manufacturer
ALSC [Alliance Semiconductor Corporation]
Datasheet
November 2003
rev 1.0
General Description
The ASM1233A is a voltage supervisor with low-power, 3.3V
µP Reset, with an active LOW, open-drain output. Maximum
supply current over temperature is a low 15µA.
The ASM1233A 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. The tolerance is 15% for the 3.3V, ASM1233A. 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 ASM1233A is designed with a open-drain output stage and
operates over the extended industrial temperature range.
Devices are available in compact SOT-223 packages.
Other low power products in this family include the ASM1810/
11/12/15/16/17, ASM1233D, and ASM1233M
Key Features
Applications
Low Supply Current
•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 SOT-223 package
Operating temperature -40°C to +85°C
Set-top boxes
Cellular phones
PDAs
Energy management systems
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, 3.3V, 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
)
Typical Operating Circuit
Block Diagram
Embedded control systems
Printers
Single board computers
Reference
Tolerance
Supply
V
Bias
ASM1233A
CC
V
GND
CC
RESET
+
+
-
-
Typical
Typical
350ms
Delay
Delay
Microprocessor
RESET
ASM1233A
GND
5.0kΩ
ASM1233A
RESET

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ASM1233AZ-15 Summary of contents

Page 1

November 2003 rev 1.0 Low Power, 3.3V, µP Reset, Active LOW, Open-Drain Output General Description The ASM1233A is a voltage supervisor with low-power, 3.3V µP Reset, with an active LOW, open-drain output. Maximum supply current over temperature is a low ...

Page 2

November 2003 rev 1.0 Pin Configuration Pin Description Pin# Pin Name 1 GND Ground. 2 RESET Active LOW reset output Power supply input GND Ground. Low Power, 3.3V, µP Reset, Active LOW, Open-Drain Output Notice: The ...

Page 3

November 2003 rev 1.0 Application Information Operation - Power Monitor The ASM1233A 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 ...

Page 4

November 2003 rev 1.0 Absolute Maximum Ratings Parameter Voltage Voltage on RESET Operating Temperature Range Soldering Temperature (for 10 sec) Storage Temperature NOTE: These are stress ratings only and functional use is not implied. Exposure to absolute ...

Page 5

November 2003 rev 1.0 Electrical Characteristics Unless otherwise noted 1.2V to 5.5V and specifications are over the operating temperature range of -40°C to +85°C. CC All voltages are referenced to ground. Parameter Symbol Supply Voltage V Output Voltage ...

Page 6

November 2003 rev 1.0 Family Selection Guide Part # RESET Voltage (V) ASM1810 4.620, 4.370, 4.120 ASM1811 4.620, 4.350, 4.130 ASM1812 4.620, 4.350, 4.130 ASM1815 3.060, 2.880, 2.550 ASM1816 3.060, 2.880, 2.550 ASM1817 3.060, 2.880, 2.550 ASM1233D 4.625, 4.375, 4.125 ...

Page 7

November 2003 rev 1.0 Package Information Dimensions in millimeters Symbol Min Max A 0.067 0.060 A1 0.004 0.0008 B 0.124 0.116 B1 0.033 0.026 C 0.014 0.010 D 0.264 0.248 e ...

Page 8

... November 2003 rev 1.0 Ordering Information Part Number RESET Output Voltage ASM1233AZ-15 2.720 V * Internal 5kΩ resistor pull-up Low Power, 3.3V, µP Reset, Active LOW, Open-Drain Output Notice: The information in this document is subject to change without notice RESET Tolerance RESET Time 15% 350 ms ASM1233A Open-Drain RESET Polarity ...

Page 9

Alliance Semiconductor Corporation 2575, Augustine Drive, Santa Clara, CA 95054 Tel: 408 - 855 - 4900 Fax: 408 - 855 - 4999 www.alsc.com © Copyright 2003 Alliance Semiconductor Corporation. All rights reserved. Our three-point logo, our name and Intelliwatt are ...

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