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SC70/µDFN, Single/Dual Low-Voltage, Low-Power µP Reset Circuits

Product Details

The MAX6381–MAX6390 microprocessor (µP) supervisory circuits monitor power-supply voltages from +1.8V to +5.0V while consuming only 3µA of supply current at +1.8V. Whenever VCC falls below the factory-set reset thresholds, the reset output asserts and remains asserted for a minimum reset timeout period after VCC rises above the reset threshold. Reset thresholds are available from +1.58V to +4.63V, in approximately 100mV increments. Seven minimum reset timeout delays ranging from 1ms to 1200ms are available.

The MAX6381/MAX6384/MAX6387 have a push-pull active-low reset output. The MAX6382/MAX6385/MAX6388 have a push-pull active-high reset output, and the MAX6383/MAX6386/MAX6389/MAX6390 have an open-drain active-low reset output. The MAX6384/MAX6385/MAX6386 also feature a debounced manual reset input (with internal pullup resistor). The MAX6387/MAX6388/MAX6389 have an auxiliary input for monitoring a second voltage. The MAX6390 offers a manual reset input with a longer VCC reset timeout period (1120ms or 1200ms) and a shorter manual reset timeout (140ms or 150ms).

The MAX6381/MAX6382/MAX6383 are available in 3-pin SC70 and 6-pin µDFN packages and the MAX6384–MAX6390 are available in 4-pin SC70 and 6-pin µDFN packages.

Key Features

  • Factory-Set Reset Threshold Voltages Ranging from +1.58V to +4.63V in Approximately 100mV Increments
  • ±2.5% Reset Threshold Accuracy Over Temperature (-40°C to +125°C)
  • Seven Reset Timeout Periods Available: 1ms, 20ms, 140ms, 280ms, 560ms, 1120ms, 1200ms (min)
  • 3 Reset Output Options
    • Active-Low Push-Pull
    • Active-High Push-Pull
    • Active-Low Open-Drain
  • Reset Output State Guaranteed Valid Down to VCC = 1V
  • Manual Reset Input (MAX6384/MAX6385/MAX6386)
  • Auxiliary RESET IN (MAX6387/MAX6388/MAX6389)
  • VCC Reset Timeout (1120ms or 1200ms)/Manual Reset Timeout (140ms or 150ms) (MAX6390)
  • Negative-Going VCC Transient Immunity
  • Low Power Consumption of 6µA at +3.6V and 3µA at +1.8V
  • Pin Compatible with MAX809/MAX810/MAX803/MAX6326/MAX6327/MAX6328/MAX6346/MAX6347/MAX6348, and MAX6711/MAX6712/MAX6713
  • Tiny 3-Pin/4-Pin SC70 and 6-Pin µDFN Packages
  • AEC-Q100 Qualified, Refer to Ordering Information for the Specific /V Trim Version

Applications/Uses

  • Computers
  • Controllers
  • Critical µP and µC Power Monitoring
  • Dual Voltage Systems
  • Intelligent Instruments
  • Portable Battery-Powered Equipment
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
Open Drain
Interface Factory Fixed
R/C Adjustable
tRESET (min) 1ms to 15ms
15ms to 85ms
85ms to 300ms
300ms to 1s
>1s
Watchdog Feature No Watchdog
Supervisor Features Adjustable Reset Input
ICC (µA) (max) 13
Package/Pins SC70/4
UDFN/6
Budgetary
Price (See Notes)
$1.21 @1k
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) 1.5
Reset Out Active Low
Push-Pull
tRESET (min) 1ms to 15ms
15ms to 85ms
85ms to 300ms
300ms to 1s
>1s
Watchdog Feature No Watchdog
Supervisor Features -
ICC (µA) (max) 13
Package/Pins SC70/3
UDFN/6
Budgetary
Price (See Notes)
$1.19 @1k
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Parametric specs for Resets and Supervisors with Pushbutton Manual Reset Inputs
Reset Thresh. (V) 1.2 to 1.79
1.8 to 2.49
2.5 to 3.29
3.3 to 4.99
Reset Thresh. Accur. (%) (@ +25°C) 1.5
# Voltages Monitored 1
Manual Reset Feature Single Soft/Hard Reset Output
MR1 Setup Time 1µs
Reset Out Active Low
Open Drain
tRESET (min) >1s
ICC (µA) (max) 13
Oper. Temp. (°C) -40 to +85
-40 to +125
0 to +70
Package/Pins SC70/4
Budgetary
Price (See Notes)
$1.21 @1k
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Simplified Block Diagram

MAX6381, MAX6382, MAX6383, MAX6384, MAX6385, MAX6386, MAX6387, MAX6388, MAX6389, MAX6390: Typical Operating Circuit MAX6381, MAX6382, MAX6383, MAX6384, MAX6385, MAX6386, MAX6387, MAX6388, MAX6389, MAX6390: Typical Operating Circuit Zoom icon

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Parameters

Key Features

  • Factory-Set Reset Threshold Voltages Ranging from +1.58V to +4.63V in Approximately 100mV Increments
  • ±2.5% Reset Threshold Accuracy Over Temperature (-40°C to +125°C)
  • Seven Reset Timeout Periods Available: 1ms, 20ms, 140ms, 280ms, 560ms, 1120ms, 1200ms (min)
  • 3 Reset Output Options
    • Active-Low Push-Pull
    • Active-High Push-Pull
    • Active-Low Open-Drain
  • Reset Output State Guaranteed Valid Down to VCC = 1V
  • Manual Reset Input (MAX6384/MAX6385/MAX6386)
  • Auxiliary RESET IN (MAX6387/MAX6388/MAX6389)
  • VCC Reset Timeout (1120ms or 1200ms)/Manual Reset Timeout (140ms or 150ms) (MAX6390)
  • Negative-Going VCC Transient Immunity
  • Low Power Consumption of 6µA at +3.6V and 3µA at +1.8V
  • Pin Compatible with MAX809/MAX810/MAX803/MAX6326/MAX6327/MAX6328/MAX6346/MAX6347/MAX6348, and MAX6711/MAX6712/MAX6713
  • Tiny 3-Pin/4-Pin SC70 and 6-Pin µDFN Packages
  • AEC-Q100 Qualified, Refer to Ordering Information for the Specific /V Trim Version

Applications/Uses

  • Computers
  • Controllers
  • Critical µP and µC Power Monitoring
  • Dual Voltage Systems
  • Intelligent Instruments
  • Portable Battery-Powered Equipment

Description

The MAX6381–MAX6390 microprocessor (µP) supervisory circuits monitor power-supply voltages from +1.8V to +5.0V while consuming only 3µA of supply current at +1.8V. Whenever VCC falls below the factory-set reset thresholds, the reset output asserts and remains asserted for a minimum reset timeout period after VCC rises above the reset threshold. Reset thresholds are available from +1.58V to +4.63V, in approximately 100mV increments. Seven minimum reset timeout delays ranging from 1ms to 1200ms are available.

The MAX6381/MAX6384/MAX6387 have a push-pull active-low reset output. The MAX6382/MAX6385/MAX6388 have a push-pull active-high reset output, and the MAX6383/MAX6386/MAX6389/MAX6390 have an open-drain active-low reset output. The MAX6384/MAX6385/MAX6386 also feature a debounced manual reset input (with internal pullup resistor). The MAX6387/MAX6388/MAX6389 have an auxiliary input for monitoring a second voltage. The MAX6390 offers a manual reset input with a longer VCC reset timeout period (1120ms or 1200ms) and a shorter manual reset timeout (140ms or 150ms).

The MAX6381/MAX6382/MAX6383 are available in 3-pin SC70 and 6-pin µDFN packages and the MAX6384–MAX6390 are available in 4-pin SC70 and 6-pin µDFN packages.

Simplified Block Diagram

MAX6381, MAX6382, MAX6383, MAX6384, MAX6385, MAX6386, MAX6387, MAX6388, MAX6389, MAX6390: Typical Operating Circuit MAX6381, MAX6382, MAX6383, MAX6384, MAX6385, MAX6386, MAX6387, MAX6388, MAX6389, MAX6390: 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