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Maxim > Products > Supervisors, Voltage Monitors, Sequencers > MAX823, MAX823L, MAX823M, ...

MAX823, MAX823L, MAX823M, MAX823R, MAX823S, MAX823T, MAX823Y, MAX823Z, MAX824, MAX824L, MAX824M, MAX824R, MAX824S, MAX824T, MAX824Y, MAX824Z, MAX825, MAX825L, MAX825M, MAX825R, MAX825S, MAX825T, MAX825Y, MAX825Z

5-Pin Microprocessor Supervisory Circuits with Watchdog Timer and Manual Reset

Industry's-First SOT Reset ICs with Watchdog and Manual Reset
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Status Explanations for product status codes

Active: In Production.

Description

The MAX823/MAX824/MAX825 microprocessor (µP) supervisory circuits combine reset output, watchdog, and manual reset input functions in 5-pin SOT23 and SC70 packages. They significantly improve system reliability and accuracy compared to separate ICs or discrete components. The MAX823/MAX824/MAX825 are specifically designed to ignore fast transients on VCC.

Seven preprogrammed reset threshold voltages are available (see Reset Threshold Table in the full data sheet). All three devices have an active-low reset output, which is guaranteed to be in the correct state for VCC down to 1V. The MAX823 also offers a watchdog input and manual reset input. The MAX824 offers a watchdog input and a complementary active-high reset. The MAX825 offers a manual reset input and a complementary active-high reset. The Selector Guide explains the functions offered in this series of parts.
 

Data Sheet

Download this datasheet in PDF formatDownload Rev 5 (PDF, 212kB)
Send this datasheet to any email addressE-Mail

Key Features

  • Precision Monitoring of +2.5V, +3V, +3.3V, and +5V Power Supplies
  • Operating Current:
    • 6µA (MAX823L/M) (SC70)
    • 2µA (MAX825T/S/R/Z/Y) (SC70)
  • Fully Specified Over Temperature
  • 140ms min Power-On Reset
  • Guaranteed active-low RESET Valid to VCC = 1V
  • Power-Supply Transient Immunity
  • Watchdog Timer with 1.6s Timeout (MAX823/MAX824)
  • Manual Reset Input (MAX823/MAX825)
  • No External Components
 

Applications/Uses

  • Automotive Electronics
  • Computers and Controllers
  • Critical µP Monitoring
  • Embedded Controllers
  • Intelligent Instruments
  • Portable Battery-Powered Equipment
   

Key Specifications:

Supervisors (1 Monitored Voltage)
Part Number Reset Thresh.
(V)		 Reset Out tRESET Watchdog Feature Watchdog Timeout Supervisor Features ICC
(µA)		 Budgetary Price
min max See Notes
MAX823 
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5
Active Low
Push-Pull
 85ms to 300ms Input (WDI) 1s to 2s Manual Reset 24 $1.15 @1k
MAX824 
Active High
Active Low
Push-Pull
 Input (WDI) 1s to 2s - 24 $1.21 @1k
MAX825 
Active High
Active Low
Push-Pull
 No Watchdog - Manual Reset 12 $1.15 @1k
See All Supervisors (1 Monitored Voltage) (274)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.


  • Active-low reset with manual reset and watchdog timer (MAX823)
  • Active-low reset and active-high reset with watchdog timer (MAX824)
  • Active-low reset and active-high reset with manual reset (MAX825)
    		•

    Diagram

    MAX823, MAX823L, MAX823M, MAX823R, MAX823S, MAX823T, MAX823Y, MAX823Z, MAX824, MAX824L, MAX824M, MAX824R, MAX824S, MAX824T, MAX824Y, MAX824Z, MAX825, MAX825L, MAX825M, MAX825R, MAX825S, MAX825T, MAX825Y, MAX825Z: Typical Operating Circuit
    Typical Operating Circuit

    More Information

    Topmark Coding MAX823
    Topmark Coding MAX824
    Topmark Coding MAX825
    New Product Press Release [ 2000-10-05 ]

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    Document Ref.: 19-0487 Rev 5; 2006-03-14
    This page last modified: 2010-05-14



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