ADM824LAKS-RL

更新时间： 2024-11-06 12:59:23

品牌	Logo	应用领域
亚德诺 - ADI		监控
页数	文件大小	规格书
12页	188K
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数据手册

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ADM824LAKS-RL 数据手册

Supervisory Circuits with Watchdog and

Manual Reset in 5-Lead SC70 and SOT-23

ADM823/ADM824/ADM825

FEATURES

FUNCTIONAL BLOCK DIAGRAM

Precision 2.5 V to 5 V power supply monitor

7 reset threshold options: 2.19 V to 4.63 V

140 ms (minimum) reset timeout

Watchdog timer with 1.6 sec timeout (ADM823, ADM824)

Manual reset input (ADM823, ADM825)

Push-pull output stages

ADM823

RESET

GENERATOR

RESET

REF

DEBOUNCE

RESET (ADM823)

WATCHDOG

DETECTOR

RESET, RESET (ADM824/ADM825)

Low power consumption: 5 μA

Guaranteed reset output valid to V_CC= 1 V

Power supply glitch immunity

Specified over automotive temperature range

5-lead SC70 and SOT-23 packages

GND

WDI

Figure 1.

APPLICATIONS

Microprocessor systems

Computers

Controllers

Intelligent instruments

Portable equipment

GENERAL DESCRIPTION

The ADM823/ADM824/ADM825 are supervisory circuits that

monitor power supply voltage levels and code execution integrity

in microprocessor-based systems. In addition to providing

power-on reset signals, an on-chip watchdog timer can reset the

microprocessor if it fails to strobe within a preset timeout

period. A reset signal can also be asserted by an external push-

button, through a manual reset input. The three parts feature

different combinations of watchdog input, manual reset input,

and output stage configuration, as shown in Table 1.

These parts are available in a choice of seven reset threshold

options ranging from 2.19 V to 4.63 V. The reset and watchdog

timeout periods are fixed at 140 ms (minimum) and 1.6 sec

(typical), respectively.

The ADM823/ADM824/ADM825 are available in 5-lead SC70

and SOT-23 packages and typically consume only 5 μA, making

them suitable for use in low power, portable applications.

Table 1. Selection Table

Output Stage

RESET

Part No.

ADM823

ADM824

ADM825

Watchdog Timer

Manual Reset

Yes

–

Yes

–

Push-Pull

–

Push-Pull

Yes

Rev. C

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 registeredtrademarks arethe property of their respective owners.

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

Tel: 781.329.4700 www.analog.com

12 3 4 5 6 7...12

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