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MAX804R

MAX804R

3.0V/3.3V Microprocessor Supervisory Circuits

Industry's-First Battery-Backup Supervisor for 3.3V/3.0V Systems

Data Sheet
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Overview

Description

These microprocessor (µP) supervisory circuits reduce the complexity and number of components required for power-supply monitoring and battery-control functions in µP systems. They significantly improve system reliability and accuracy compared to separate ICs or discrete components.

These devices are designed for use in systems powered by 3.0V or 3.3V supplies. See the selector guide in the back of this data sheet for similar devices designed for 5V systems. The suffixes denote different reset threshold voltages: 3.075V (T), 2.925V (S), and 2.625V (R) (see Reset Threshold section in the Detailed Description). All these parts are available in 8-pin DIP and SO packages. Functions offered in this series are as follows:

Part Active-Low Reset Active-High Reset Watchdog Input Manual Reset Input Backup-Battery Switch Power-Fail Threshold Accuracy Power-Fail Comparator Reset Window
MAX690 √   √   √ ±4% √ ±75mV
MAX704 √     √ √ ±4% √ ±75mV
MAX802 √   √   √ ±2% √ ±2%
MAX804   √ √   √ ±2% √ ±2%
MAX805   √ √   √ ±4% √ ±75mV
MAX806 √     √ √ ±2% √ ±2%

MAX690T: Typical Operating Circuit MAX690T: Typical Operating Circuit Enlarge+

Key Features

  • Active-Low RESET and RESET Outputs
  • Manual Reset Input
  • Precision Supply-Voltage Monitor
  • 200ms Reset Time Delay
  • Watchdog Timer (1.6sec timeout)
  • Battery-Backup Power Switching-Battery Can Exceed VCC in Normal Operation
  • 40µA VCC Supply Current
  • 1µA Battery Supply Current
  • Voltage Monitor for Power-Fail or Low-Battery Warning
  • Guaranteed Active-Low RESET Assertion to VCC = 1V
  • 8-Pin DIP and SO Packages

Applications/Uses

  • Battery-Powered Computers/Controllers
  • Critical µP Monitoring
  • Embedded Controllers
  • Intelligent Instruments
  • Portable Equipment

Parametric Specs

Part NumberReset Thresh.
(V)		Reset OutICC
(µA)		Oper. Temp.
(°C)		Package/PinsBudgetary
Price
maxSee Notes
MAX690R 2.5 to 3.0
Active Low
Push-Pull
50
-55 to +125
-40 to +85
0 to +70
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
$3.88 @1k
MAX690S 2.5 to 3.0
Active Low
Push-Pull
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
$3.01 @1k
MAX690T 3.0 to 3.5
Active Low
Push-Pull
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
$3.88 @1k
MAX704R 2.5 to 3.0
Active Low
Push-Pull
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
$5.23 @1k
MAX704S 2.5 to 3.0
Active Low
Push-Pull
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
$4.98 @1k
MAX704T 3.0 to 3.5
Active Low
Push-Pull
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
$3.47 @1k
MAX802R 2.5 to 3.0
Active Low
Push-Pull
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
$7.21 @1k
MAX802S 2.5 to 3.0
Active Low
Push-Pull
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
$5.95 @1k
MAX802T 3.0 to 3.5
Active Low
Push-Pull
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
$4.88 @1k
MAX804 2.5 to 3.3
Active High
Active Low
Open Drain
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
$7.21 @1k
MAX805R 2.5 to 3.0
Active High
Open Drain
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
-
MAX805S 2.5 to 3.0
Active High
Open Drain
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
$4.55 @1k
MAX805T 3.0 to 3.5
Active High
Open Drain
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
$4.55 @1k
MAX806 2.5 to 3.3
Active Low
Push-Pull
CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
$5.45 @1k
See All Battery Backup Circuits (82)
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: MAX804R 
Lead-Free Package Tin (Sn) Whisker Reports

CAD Symbols and Footprints

  • MAX804RCPA
  • MAX804RCPA+
  • MAX804RCSA
  • MAX804RCSA+
  • MAX804RCSA+T
  • MAX804RCSA-T
  • MAX804REPA
  • MAX804REPA+
  • MAX804RESA
  • MAX804RESA+
  • MAX804RESA+T
  • MAX804RESA-T
  • MAX804RMJA
    •

    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.

    Quality Management System >
    Environmental Management System >

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