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Low-Power Dual-/Triple-Voltage SC70 µP Supervisory Circuits

Low-Power, Dual-/Triple-Voltage SC70 µP Supervisory Circuits are Ideal for Portable Equipment

Product Details

Key Features

Parametric specs for Supervisors (2 Monitored Voltages)
Reset Thresh. (V) 0 to 1.2
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) 3
Reset Out Active Low
Push-Pull
Interface Factory Fixed
tRESET (min) 85ms to 300ms
>1s
Watchdog Feature No Watchdog
Supervisor Features Manual Reset
ICC (µA) (max) 12
Package/Pins SC70/5
Budgetary
Price (See Notes)
1.33
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Simplified Block Diagram

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Parameters

Parametric specs for Supervisors (2 Monitored Voltages)
Reset Thresh. (V) 0 to 1.2
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) 3
Reset Out Active Low
Push-Pull
Interface Factory Fixed
tRESET (min) 85ms to 300ms
>1s
Watchdog Feature No Watchdog
Supervisor Features Manual Reset
ICC (µA) (max) 12
Package/Pins SC70/5
Budgetary
Price (See Notes)
1.33

Key Features

  • Dual-/Triple-Supply Reset Voltage Monitors
  • Precision Factory-Set Reset Thresholds for Monitoring from 0.9V to 5.0V
  • Adjustable Reset Input Down to 0.488V
  • 150ms and 1200ms (min) Reset Timeout Period Options
  • VCC1 Power-OK Output for Power-Supply Sequencing Applications (MAX6741/MAX6744)
  • Power-Fail Input/Power-Fail Output (MAX6742/MAX6745)
  • 6µA Supply Current
  • Tiny SC70 Package
  • Applications/Uses

    • Controllers
    • GPS Equipment
    • Multivoltage Systems
    • Notebook Computers
    • PDAs
    • Portable Battery-Powered Equipment
    • POS Equipment

    Description

    The MAX6736–MAX6745 are low-power dual-/triple-voltage microprocessor (µP) supervisors. These devices assert a reset if any monitored supply falls below its factory-trimmed or adjustable threshold and maintain reset for a minimum timeout period after all supplies rise above their thresholds. The integrated dual/triple supervisory circuits significantly reduce size and power compared to separate ICs or discrete components. The low supply current of 6µA makes these devices ideal for portable equipment.

    The MAX6736/MAX6737 are dual fixed-voltage µP supervisors with a manual reset input. The MAX6738/MAX6739 have one fixed and one adjustable reset threshold and a manual reset input. The MAX6740/MAX6743 are triple-voltage µP supervisors with two fixed and one user-adjustable reset threshold inputs. The MAX6741/MAX6744 are dual-voltage µP supervisors with a power-OK (POK) output ideal for power-supply sequencing. The MAX6742/MAX6745 monitor the primary VCC supply and have an independent power-fail comparator.

    The MAX6736–MAX6745 monitor I/O supply voltages (VCC1) from 1.8V to 5.0V and core supply voltages (VCC2) from 0.9V to 3.3V with factory-trimmed reset threshold voltage options (Table 1). An external adjustable RSTIN input option allows monitoring voltages down to 0.5V.

    A variety of push-pull or open-drain reset outputs along with manual reset input and power-fail input/output features are available (see the Selector Guide). The MAX6736–MAX6745 are offered in a space-saving 5-pin SC70 package and operate over the -40°C to +85°C temperature range.

    Simplified Block Diagram

    MAX6736, MAX6737, MAX6738, MAX6739, MAX6740, MAX6741, MAX6742, MAX6743, MAX6744, MAX6745: Functional Diagram MAX6736, MAX6737, MAX6738, MAX6739, MAX6740, MAX6741, MAX6742, MAX6743, MAX6744, MAX6745: 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 .