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+5V, Low-Power, µP Supervisory Circuits with Adjustable Reset/Watchdog

Product Details

Key Features

Parametric specs for Supervisors (1 Monitored Voltage)
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) 2
Reset Out Active Low
Open Drain
tRESET (min) 1ms to 15ms
15ms to 85ms
85ms to 300ms
300ms to 1s
<1ms
>1s
Adjustable
Watchdog Feature Cap Adjustable
Input (WDI)
Watchdog Timeout 1s to 2s
<1s
>2s
Adjustable
ICC (µA) (max) 7
Package/Pins PDIP/8
SOIC (N)/8
UMAX/8
Budgetary
Price (See Notes)
2.63
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Simplified Block Diagram

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Parameters

Parametric specs for Supervisors (1 Monitored Voltage)
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) 2
Reset Out Active Low
Open Drain
tRESET (min) 1ms to 15ms
15ms to 85ms
85ms to 300ms
300ms to 1s
<1ms
>1s
Adjustable
Watchdog Feature Cap Adjustable
Input (WDI)
Watchdog Timeout 1s to 2s
<1s
>2s
Adjustable
ICC (µA) (max) 7
Package/Pins PDIP/8
SOIC (N)/8
UMAX/8
Budgetary
Price (See Notes)
2.63

Key Features

  • Adjustable Reset Threshold
  • Adjustable Reset Timeout
  • Adjustable Watchdog Timeout
  • 500x Watchdog Timeout Multiplier
  • 4µA Supply Current
  • RESET or Active-Low RESET Output Options
  • Push-Pull or Open-Drain Output Options
  • Guaranteed Active-Low RESET Asserted At or Above VCC = 1V (MAX6301/MAX6303)
  • Power-Supply Transient Immunity
  • Watchdog Function can be Disabled
  • PDIP/SO/µMAX Packages Available

Applications/Uses

  • Battery-Powered Computers/Controllers
  • Computers: Desktop, Workstation, Server
  • Critical µP Monitoring
  • Embedded Controllers
  • Intelligent Instruments
  • Medical Equipment
  • Portable Equipment
  • Set-Top Boxes

Description

The MAX6301–MAX6304 low-power microprocessor (µP) supervisory circuits provide maximum adjustability for reset and watchdog functions. The reset threshold can be adjusted to any voltage above 1.22V, using external resistors. In addition, the reset and watchdog timeout periods are adjustable using external capacitors. A watchdog select pin extends the watchdog timeout period to 500x. The reset function features immunity to power-supply transients.

These four devices differ only in the structure of their reset outputs (see the Selector Guide in the full data sheet). The MAX6301–MAX6304 are available in the space-saving 8-pin µMAX® package, as well as 8-pin PDIP and SO packages.

Simplified Block Diagram

MAX6301, MAX6302, MAX6303, MAX6304: Typical Operating Circuit MAX6301, MAX6302, MAX6303, MAX6304: Typical Operating Circuit 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 .