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ADM810

Description
Microprocessor Supervisory Circuit in 3-Pin SOT-23
File Size140KB,6 Pages
ManufacturerADI
Websitehttps://www.analog.com
Download Datasheet Download user manual View All

ADM810 Overview

Microprocessor Supervisory Circuit in 3-Pin SOT-23

a
Microprocessor
Supervisory Circuit in 3-Pin SOT-23
ADM809/ADM810
FUNCTIONAL BLOCK DIAGRAM
ADM809/ADM810
V
CC
V
REF
FEATURES
Superior Upgrade for MAX809/MAX810
Specified Over Temperature
Low Power Consumption (17 A)
Precision Voltage Monitor: +3 V, +3.3 V, +5 V Options
Reset Assertion Down to 1 V V
CC
140 ms min Power-On Reset
Logic Low
RESET
Output (ADM809)
Logic High RESET Output (ADM810)
APPLICATIONS
Microprocessor Systems
Computers
Controllers
Intelligent Instruments
Automotive Systems
RESET
GENERATOR
240ms
RESET
(RESET)
GND
GENERAL DESCRIPTION
The ADM809/ADM810 supervisory circuits monitor the
power supply voltage in microprocessor systems. They pro-
vide a reset output during power-up, power-down and
brownout conditions. On power-up, an internal timer holds
reset asserted for 240 ms. This holds the microprocessor in a
reset state until conditions have stabilized. The
RESET
output remains operational with V
CC
as low as 1 V. The
ADM809 provides an active low reset signal (RESET) while
the ADM810 provides an active high signal (RESET) output.
Six reset threshold voltage options are available suitable for
monitoring a variety of supply voltages. Refer to Table I.
The reset comparator features built-in glitch immunity,
making it immune to fast transients on V
CC
.
The ADM809/ADM810 consumes only 17
µA,
making it
suitable for low power portable equipment. It is packaged in
a 3-pin SOT-23 package.
V
CC
V
CC
V
CC
ADM809
RESET
RESET
INPUT
µP
SYSTEM
GND
GND
Figure 1. Typical Operating Circuit
REV. 0
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
World Wide Web Site: http://www.analog.com
Fax: 617/326-8703
© Analog Devices, Inc., 1997
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Datasheet   0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
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