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MAX808

MAX808L, MAX808M, MAX808N

8-Pin µP Supervisory Circuits with ±1.5% Reset Accuracy

1.5% Accurate Reset ICs with Battery-Backup

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Overview

Description

The MAX801/MAX808 microprocessor (µP) supervisory circuits monitor and control the activities of +5V µPs by providing backup-battery switchover, low-line indication, and µP reset. Additional features include a watchdog for the MAX801 and CMOS RAM write protection for the MAX808.

The MAX801/MAX808 offer a choice of reset-threshold voltage (denoted by suffix letter): 4.675V (L), 4.575V (N), and 4.425V (M). These devices are available in 8-pin DIP and SO packages.
MAX801L, MAX801M, MAX801N, MAX808L, MAX808M, MAX808N: Typical Operating Circuit MAX801L, MAX801M, MAX801N, MAX808L, MAX808M, MAX808N: Typical Operating Circuit Enlarge+

Key Features

  • Precision Voltage Monitoring, ±1.5% Reset Accuracy
  • 200ms Power-OK/Reset Time Delay
  • Active-low RESET Output (MAX808)
  • RESET and active-low RESET Outputs (MAX801)
  • Watchdog Timer (MAX801)
  • On-Board Gating of Chip-Enable Signals (MAX808):
    • Memory Write-Cycle Completion
    • 3ns CE Gate Propagation Delay
  • 1µA Standby Current
  • Power Switching:
    • 250mA in VCC Mode
    • 20mA in Battery-Backup Mode
  • MaxCap™/SuperCap™ Compatible
  • Active-low RESET Guaranteed Valid to VCC = 1V
  • Low-Line Threshold 52mV Above Reset Threshold

Applications/Uses

  • Computers: Desktop, Workstation, Server
  • Controllers
  • Critical µP Monitoring
  • Embedded Systems
  • Intelligent Instruments
  • Portable Battery-Powered Equipment

Parametric Specs

Part NumberReset Thresh.
(V)		Reset OutICC
(µA)		Oper. Temp.
(°C)		Package/PinsBudgetary
Price
maxSee Notes
MAX801 
4.0 to 4.5
4.5 to 5.0
Active High
Active Low
Push-Pull
110
-40 to +85
0 to +70
PDIP/8
SOIC (N)/8
$5.04 @1k
MAX808 
Active Low
Push-Pull
90
PDIP/8
SOIC (N)/8
$3.61 @1k
See All Battery Backup Circuits (81)
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 and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Design Resources

Quality and Environmental Data

Request Reliability Report for: MAX808L  MAX808M  MAX808N 
Lead-Free Package Tin (Sn) Whisker Reports

Quality And Environmental

Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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