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Part Number: ADM8699

 

MFG: ADI

 

D/C: 09

Description: The ADM8698/ADM8699 supervisory circuits provide power supply monitoring and watchdog timing for micropro...


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ADM8699 General Description


The ADM8698/ADM8699 supervisory circuits provide power supply monitoring and watchdog timing for microprocessor systems.

The ADM8698 monitors the 5 V VCC power supply and generates a RESET pulse during power up, power down and during low voltage "Brown Out" conditions. The RESET output is guaranteed to be functional (logic low) with VCC as low as 1 V.

The ADM8699 features an identical monitoring circuit as in the ADM8698, plus an additional watchdog timer input to monitor microprocessor activity. The RESET output is forced low if the watchdog input is not toggled within the 1 second watchdog timeout period.

Both parts are available in 8-pin plastic DIP/SOIC and 16-lead SOIC packages. The 16-lead SOIC contains additional outputs RESET (without inversion) and Watchdog Output WDO (ADM8699 only).

ADM8699 Maximum Ratings

(TA = +25°C unless otherwise noted)
VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to +6 V
All Other Inputs . . . . . . . . . . . . . . . . . . . 0.3 V to VCC + 0.3 V
Power Dissipation 8-Pin DIP . . . . . . . . . . . . . . . . . . . .. 500 mW
  JA, Thermal Impedance . . . . . . . . . . . . . . . . . . . . +120°C/W
Power Dissipation 16-Pin SOIC . . . . . . . . . . . . . . . . .... 375 mW
  JA, Thermal Impedance . . . . . . . . . . . . . . . . . . . . +110°C/W
Power Dissipation 8-Pin SOIC . . . . . . . . . . . . . . . . . .... 500 mW
  JA, Thermal Impedance . . . . . . . . . . . . . . . . . . . . +125°C/W
Operating Temperature Range
  Industrial (A Version) . . . . . . . . . . . . . . . . . 40°C to +85°C
Storage Temperature Range . . . . . . . . . . . 65°C to +150°C
Lead Temperature (Soldering, 10 secs) . . . . . . . .  . . . +300°C
  Vapor Phase (60 secs) . . . . . . . . . . . . . . . . . . . . . . .. +215°C
  Infrared (15 secs) . . . . . . . . . . . . . . . . . . . . . . . . . . . +220°C
ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .>4 kV

ADM8699 Features

Superior Upgrade for ADM698/ADM699, MAX698/MAX699
Guaranteed RESET Assertion with VCC = 1 V
Low 70 A Supply Current
Precision 4.65 V Voltage Monitor
Power OK/Reset Time Delay
Watchdog Timer
Minimum Component Count
Performance Specified over Temperature

ADM8699 Typical Application

Microprocessor Systems
Computers
Controllers
Intelligent Instruments
Automotive Systems
Critical P Power Monitoring

ADM8699 Connection Diagram

ADM8699 Connection DiagramADM8699 Connection Diagram

ADM8699 datasheet

ADM8699
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