ADM803RAKSZREEL7 Analog Devices, ADM803RAKSZREEL7 Datasheet

ADM803RAKSZREEL7

Manufacturer Part Number

ADM803RAKSZREEL7

Description

SC70-3

Manufacturer

Analog Devices

Datasheet

1.ADM810RARTZ-REEL7.pdf (12 pages)

Specifications of ADM803RAKSZREEL7

Date_code

06+

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GENERAL DESCRIPTION

The ADM803/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 opera

tional with V

provide an active low reset signal (RESET), while the ADM810

provides an active high signal (RESET) output. The ADM809

and ADM810 have push-pull outputs, whereas the ADM803 has

an open-drain output, which requires an external pull-up resistor.

Seven 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

The ADM803/ADM809/ADM810 consume only 17 mA,

making them suitable for low power, portable equipment.

The ADM803 is available in a 3-lead SC70; the ADM809/

ADM810 is available in 3-lead SOT-23 and SC70 packages.

REV. F

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 that

may result from its use. No license is granted by implication or otherwise

under any patent or patent rights of Analog Devices. Trademarks and

registered trademarks are the property of their respective owners.

FEATURES

Specified over Temperature

Low Power Consumption (17 �A)

Precision Voltage Monitor: 2.5 V, 3 V, 3.3 V, 5 V Options

Reset Assertion Down to 1 V V

140 ms Min Power-On Reset

SC70 and SOT-23 Packages

APPLICATIONS

Microprocessor Systems

Computers

Controllers

Intelligent Instruments

Automotive Systems

Open-Drain RESET Output (ADM803)

Push-Pull RESET Output (ADM809)

Push-Pull RESET Output (ADM810)

as low as 1 V. The ADM803 and ADM809

Microprocessor Supervisory Circuits

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781/329-4700

Fax: 781/461-3113

ADM803/ADM809/ADM810

ADM803 /ADM809

in 3-Lead SC70 and SOT-23

Figure 1. Typical Operating Circuit

FUNCTIONAL BLOCK DIAGRAM

ADM809 /ADM810

GND

ADM803

REF

RESET

*ADM803 ONLY

GND

GENERATOR

RESET

240ms

PULL-UP

RESET

INPUT

MICROPROCESSOR

www.analog.com

SYSTEM

GND

RESET

(RESET)

RESET

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