ADM823SYRJZ-R7 Analog Devices Inc, ADM823SYRJZ-R7 Datasheet

IC,Power Supply Supervisor,TSOP,5PIN,PLASTIC

ADM823SYRJZ-R7

Manufacturer Part Number

ADM823SYRJZ-R7

Description

IC,Power Supply Supervisor,TSOP,5PIN,PLASTIC

Manufacturer

Analog Devices Inc

Type

Simple Reset/Power-On Resetr

Datasheets

1.ADM823MYRJ-R7.pdf (12 pages)

2.ADM823RYRJZ-R7.pdf (12 pages)

Specifications of ADM823SYRJZ-R7

Package / Case

SOT-23-5, SC-74A, SOT-25

Mounting Type

Surface Mount

Operating Temperature

-40°C ~ 125°C

Output

Push-Pull, Totem Pole

Reset

Active Low

Number Of Voltages Monitored

Reset Timeout

140 ms Minimum

Voltage - Threshold

2.93V

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

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FEATURES

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

Low power consumption (5 μA)

Guaranteed reset output valid to V

Power supply glitch immunity

Specified over automotive temperature range

5-lead SC70 and SOT-23 packages

APPLICATIONS

Microprocessor systems

Computers

Controllers

Intelligent instruments

Portable equipment

GENERAL DESCRIPTION

The ADM823/ADM824/ADM825 are supervisory circuits

which 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.

Table 1. Selection Table

Part No.

ADM823

ADM824

ADM825

Rev. A

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 owners.

RESET (ADM823)

RESET, RESET (ADM824/ADM825)

Watchdog Timer

Yes

–

= 1 V

Manual Reset in 5-Lead SC70 and SOT-23

Supervisory Circuits with Watchdog and

Manual Reset

Yes

–

Yes

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

Tel: 781.329.4700

Fax: 781.461.3113

Each part is 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 3 μA, making

them suitable for use in low power, portable applications.

ADM823/ADM824/ADM825

REF

ADM823

DEBOUNCE

FUNCTIONAL BLOCK DIAGRAM

GND

RESET

Push-Pull

GENERATOR

RESET

Figure 1.

WATCHDOG

DETECTOR

WDI

Output Stage

RESET

–

Push-Pull

www.analog.com

RESET

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