ADM8611WABKS-RL7

更新时间： 2024-02-20 11:56:52

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亚德诺 - ADI		监控
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7页	109K
描述
Low-Voltage Manual Reset & Watchdog Supervisory Circuits in 4-Lead SC70

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ADM8611WABKS-RL7 数据手册

Low-Voltage Manual Reset & Watchdog

Supervisory Circuits in 4-Lead SC70

Preliminary Technical Data

ADM8611/ADM8616/ADM8617/ADM8618

FEATURES

FUNCTIONAL BLOCK DIAGRAMS

Precision 1.8V to 5V Power Supply Monitoring

9 Reset Threshold Options:

1.58V to 4.63V

140ms (Min) Reset Timeout

Manual Reset Input (ADM8611)

Watchdog Timer (ADM8616–ADM8618)

Reset Output Stages

ADM8616

RESET

GENERATOR

REF

Push-Pull Active-Low

Open-Drain Active-Low

Push-Pull Active-High

WATCHDOG

DETECTOR

Low Power Consumption (3µA)

Guaranteed Reset Output valid to V_CC=1V

Power Supply Glitch Immunity

Specified Over -40°C to +85°C Temperature Range

4-Lead SC70 Package

GND

WDI

APPLICATIONS

Microprocessor Systems

Computers

Figure 1.

Controllers

Intelligent Instruments

Portable Equipment

GENERAL DESCRIPTION

Each part is available in a choice of the following 9 reset

threshold options: 1.58V, 1.67V, 2.19V, 2.32V, 2.63V, 2.93V,

3.08V, 4.38V and 4.63V. The reset timeout periods are 20ms

(min) and 140ms (min) for the ADM8611 and ADM8616–

ADM8618, respectively. The watchdog timeout period is 1.6s

(typ). The parts differ in terms of reset output configuration, as

indicated in table 1.

The ADM8611/ADM8616/ADM8617/ADM8618 are

supervisory circuits which monitor power supply voltage levels

and code execution integrity in microprocessor-based systems.

A power-on-reset signal is generated when the supply voltage

rises to a preset threshold level. The ADM8611’s debounced

manual reset input can be used to initiate a reset by means of an

external push-button or logic signal. The ADM8616–ADM8618

have an on-chip watchdog timer which can reset the

microprocessor if it fails to strobe within a preset timeout

period.

The ADM8611/ADM8616/ADM8617/ADM8618 are available

in 4-lead SC70 packages and typically consume only 3µA,

making them suitable for use in low power portable

applications.

Table 1. Selection Table

Output Stage

Part No.

Manual Reset

Watchdog

RESET

ADM8611

ADM8616

ADM8617

ADM8618

Yes

Push-Pull

Open-Drain

Yes

Push-Pull

Rev. PrB

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.

Specifications subject to change without notice. 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 companies.

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

Tel: 781.329.4700

Fax: 781.326.8703

www.analog.com

12 3 4 5 6 7

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