ADM823

PRODUCTION

Supervisory Circuit with Watchdog and Manual Reset in 5-Lead SC70 and SOT-23

Data Sheet (Rev. D) Product Selection Table

Part Models: 10
1ku List Price: Starting From $0.63

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Overview

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
Manual reset input (ADM823, ADM825)
Push-pull output stages
RESET (ADM823)
RESET, RESET (ADM824/ADM825)

Watchdog timer with 1.6 sec timeout (ADM823, ADM824)
Low power consumption (5 μA)
See Data Sheet for Additional Information

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.

Applications

Microprocessor systems
Computers
Controllers
Intelligent instruments
Portable equipment

Part Models: 10
1ku List Price: Starting From $0.63

Documentation

Data Sheet 1

ADM823/ADM824/ADM825: Supervisory Circuits with Watchdog and Manual Reset in 5-Lead SC70 and SOT-23 Data Sheet (Rev.D) 11/14/2006

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
ADM823LYKSZ-R7	5-Lead SC70	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADM823LYRJZ-R7	5-Lead SOT-23	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADM823MYRJZ-R7	5-Lead SOT-23	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADM823RYRJZ-R7	5-Lead SOT-23	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADM823SYKSZ-R7	5-Lead SC70	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADM823SYRJZ-R7	5-Lead SOT-23	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADM823TYKSZ-R7	5-Lead SC70	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADM823TYRJZ-R7	5-Lead SOT-23	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADM823YYKSZ-R7	5-Lead SC70	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADM823ZYKSZ-R7	5-Lead SC70	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

May 20, 2024 - 23_0143 Qualification of an Alternate Wafer Fab Site for 0.5um TSMC CMOS Process
		PCN23_0143_Form Material_Report Detailed Change Description Delta Qualification Matrix Qualification Results Summary
ADM823LYKSZ-R7	PRODUCTION
ADM823LYRJZ-R7	PRODUCTION
ADM823MYRJZ-R7	PRODUCTION
ADM823RYRJZ-R7	PRODUCTION
ADM823SYKSZ-R7
ADM823SYRJZ-R7	PRODUCTION
ADM823TYKSZ-R7	PRODUCTION
ADM823TYRJZ-R7	PRODUCTION
ADM823YYKSZ-R7	PRODUCTION
ADM823ZYKSZ-R7	PRODUCTION
Feb 4, 2010 - 10_0009 Halogen Free Material Change for SOT_23 Products
		Material_Report PCN10_0009_Form SOT23 Qualification Data
ADM823LYRJZ-R7	PRODUCTION
ADM823MYRJZ-R7	PRODUCTION
ADM823RYRJZ-R7	PRODUCTION
ADM823SYRJZ-R7	PRODUCTION
ADM823TYRJZ-R7	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

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