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MAX6381

MAX6381

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

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Overview

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.
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 Enlarge+

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

Part NumberMonitored VoltagesManual Reset FeatureMR1 Setup TimeReset Thresh.
(V)		Reset OuttRESETReset Thresh. Accur.
(%)		ICC
(µA)		Oper. Temp.
(°C)		Package/PinsBudgetary
Price
min@ +25°CmaxSee Notes
MAX6390 1Single Soft/Hard Reset Output1µs
1.2 to 1.79
1.8 to 2.49
2.5 to 3.29
3.3 to 4.99
Active Low
Open Drain
>1s1.513
-40 to +85
-40 to +125
0 to +70
SC70/4
UDFN/6
$1.21 @1k
See All Resets and Supervisors with Pushbutton Manual Reset Inputs (14)

Part NumberReset Thresh.
(V)		Reset OuttRESETWatchdog FeatureSupervisor FeaturesReset Thresh. Accur.
(%)		ICC
(µA)		Package/PinsBudgetary
Price
min@ +25°CmaxSee Notes
MAX6381 
1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5
Active Low
Push-Pull
1ms to 15ms
15ms to 85ms
85ms to 300ms
300ms to 1s
>1s
No Watchdog-1.513
SC70/3
UDFN/6
$1.19 @1k
MAX6382 
Active High
Push-Pull
-
SC70/3
UDFN/6
$1.00 @1k
MAX6383 
Active Low
Open Drain
-
SC70/3
UDFN/6
$1.15 @1k
MAX6384 
Active Low
Push-Pull
Manual Reset
SC70/4
UDFN/6
$1.15 @1k
MAX6385 
Active High
Push-Pull
Manual Reset
SC70/4
$2.01 @1k
MAX6386 
Active Low
Open Drain
Manual Reset
SC70/4
UDFN/6
$1.15 @1k
See All Supervisors (1 Monitored Voltage) (256)

Part NumberInterfaceReset Thresh.
(V)		Reset OuttRESETWatchdog FeatureSupervisor FeaturesReset Thresh. Accur.
(%)		ICC
(µA)		Package/PinsBudgetary
Price
min@ +25°CmaxSee Notes
MAX6387 
Factory Fixed
R/C Adjustable
1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5
Active Low
Push-Pull
1ms to 15ms
15ms to 85ms
85ms to 300ms
300ms to 1s
>1s
No Watchdog
Adjustable Reset Input
Manual Reset
1.513
SC70/4
UDFN/6
$1.21 @1k
MAX6388 
Active High
Push-Pull
Adjustable Reset Input
SC70/4
$2.47 @1k
MAX6389 
Active Low
Open Drain
Adjustable Reset Input
SC70/4
UDFN/6
$1.15 @1k
See All Supervisors (2 Monitored Voltages) (73)
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

Technical Documents

Tutorial 4691 Introduction to Hearing Aids and Important Design Considerations
Tutorial 4671 Improve Sensor Performance and SNR in Pulse Oximeter Designs
App Note 3227 Power-On Reset and Related Supervisory Functions
App Note 1195 Maximize Battery Life and Minimize Replacements
App Note 1136 Switching Between Battery and External Power Sources
Tutorial 720 Keep the Product Working—Microprocessor Supervisors Offer Big Insurance in Small Packages

Quality and Environmental Data

Product Reliability Reports: MAX6381.pdf 
Lead-Free Package Tin (Sn) Whisker Reports

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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