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Dual/Triple-Voltage µP Supervisory Circuits

Industry's-First Multiple Voltage Supervisors in SOT Package

Product Details

Key Features

Parametric specs for Supervisors (2 Monitored Voltages)
Reset Thresh. (V) 1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5
Reset Thresh. Accur. (%) (@ +25°C) 1.5
Reset Out Active Low
Push-Pull
Interface Factory Fixed
tRESET (min) 85ms to 300ms
Watchdog Feature Extended Setup Period
Input (WDI)
Watchdog Timeout 1s to 2s
>2s
Supervisor Features Manual Reset
ICC (µA) (max) 50
Package/Pins SOT23/6
Budgetary
Price (See Notes)
1.74
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Simplified Block Diagram

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Parameters

Parametric specs for Supervisors (2 Monitored Voltages)
Reset Thresh. (V) 1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5
Reset Thresh. Accur. (%) (@ +25°C) 1.5
Reset Out Active Low
Push-Pull
Interface Factory Fixed
tRESET (min) 85ms to 300ms
Watchdog Feature Extended Setup Period
Input (WDI)
Watchdog Timeout 1s to 2s
>2s
Supervisor Features Manual Reset
ICC (µA) (max) 50
Package/Pins SOT23/6
Budgetary
Price (See Notes)
1.74

Key Features

  • Precision Monitoring of Multiple +1.8V, +2.5V, +3.0V, +3.3V, and +5V Power-Supply Voltages
  • Precision Factory-Set Power-Supply Reset Thresholds
  • 20µA Supply Current
  • 100ms min Power-On Reset Pulse Width
  • Debounced TTL/CMOS-Compatible Manual-Reset Input
  • Watchdog Timer
    • 46.4s Startup Timeout
    • 2.9s Normal Timeout
  • Fully Guaranteed Over Temperature
  • Guaranteed RESET-bar Valid to VCC1 = 1V or VCC2 = 1V
  • Power-Supply Transient Immunity
  • No External Components for Dual-Voltage Systems
  • Small 5- and 6-Pin SOT23 Packages
  • Low Cost

Applications/Uses

  • Computers
  • Controllers
  • Intelligent Instruments
  • Multivoltage Systems Equipment
  • Portable Battery-Powered

Description

The MAX6351-MAX6360 microprocessor (µP) supervisors with multiple reset voltages significantly improve system reliability and accuracy compared to separate ICs or discrete components. If any input supply voltage drops below its associated preset threshold, all reset outputs are asserted. In addition, the outputs are valid as long as either input supply voltage remains greater than +1.0V.

All devices in this series have an active-low debounced manual reset input. In addition, the MAX6358/MAX6359/MAX6360 offer a watchdog-timer input with a 46.4s startup timeout period and a 2.9s timeout period. The MAX6355/MAX6356/MAX6357 offer an additional voltage monitor input to monitor a third voltage.

The MAX6351 features two active-low, push-pull reset outputs, one is referenced to VCC1 and the other is referenced to VCC2. The MAX6353/MAX6356/MAX6359 offer an active-low, push-pull reset output referenced to VCC1. The MAX6354/MAX6357/MAX6360 offer an active-low, push-pull reset output referenced to VCC2.

All these devices are offered with a wide variety of voltage threshold levels, as shown in the Voltage Threshold Levels table. They are available in 5- and 6-pin SOT23 packages and operate over the extended (-40°C to +85°C) temperature range.

Simplified Block Diagram

MAX6351, MAX6352, MAX6353, MAX6354, MAX6355, MAX6356, MAX6357, MAX6358, MAX6359, MAX6360: Functional Diagram MAX6351, MAX6352, MAX6353, MAX6354, MAX6355, MAX6356, MAX6357, MAX6358, MAX6359, MAX6360: Functional Diagram Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .