125nA nanoPower Supervisory Circuits with Capacitor-Adjustable Reset and Watchdog Timeouts

Capacitor-Adjustable Nanopower Supervisory Circuits

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The MAX16056–MAX16059 are ultra-low-current 125nA (typ) microprocessor (µP) supervisory circuits that monitor a single system supply voltage. These devices assert an active-low reset signal whenever the VCC supply voltage drops below the factory trimmed reset threshold, manual reset is pulled low, or the watchdog timer runs out (MAX16056/MAX16058). The reset output remains asserted for an adjustable reset timeout period after VCC rises above the reset threshold. Factory-trimmed reset threshold voltages are offered from 1.575V to 4.625V in approximately 100mV increments (see Table 1 in the full data sheet).

These devices feature adjustable reset and watchdog timeout using external capacitors. The MAX16056/MAX16058 contain a watchdog timer with a watchdog select input (WDS) that multiplies the watchdog timeout period by 128. The MAX16057/MAX16059 do not have the watchdog feature.

The MAX16056–MAX16059 are available in either push-pull or open-drain output-type configurations (see the Ordering Information in the full data sheet). These devices are fully specified over the -40°C to +125°C automotive temperature range. The MAX16056/MAX16058 are available in the 8-pin TDFN package, and the MAX16057/MAX16059 are available in the 6-pin TDFN package.
MAX16056, MAX16057, MAX16058, MAX16059: Typical Operating Circuit MAX16056, MAX16057, MAX16058, MAX16059: Typical Operating Circuit Enlarge+

Key Features

  • Reduced Power Requirements
    • Ultra-Low 125nA (typ) Supply Current
    • 1.1V to 5.5V Operating Supply Range
  • Configurable Circuit Enables Flexible Designs
    • Factory-Set Reset Threshold Options from 1.575V to 4.625V in Approximately 100mV Increments
    • Capacitor-Adjustable Reset Timeout
    • Capacitor-Adjustable Watchdog Timeout (MAX16056/MAX16058)
    • Watchdog Timer Capacitor Open Detect Function
    • Optional Watchdog Disable Function (MAX16056/MAX16058)
    • Manual-Reset Input
    • Push-Pull or Open-Drain Active-Low RESET Output Options
  • Integrated Features Increases System Robustness
    • Power-Supply Transient Immunity
    • Guaranteed Active-Low RESET Valid for VCC ≥ 1.1V
  • Saves Board Space
    • 3mm x 3mm TDFN Package


  • Glucose Monitors/Patient Monitors
  • Metering/HVAC
  • MP3 Players/Pagers
  • PDAs/Cell Phones
  • Portable/Battery-Powered Equipment

See parametric specs for Supervisors (1 Monitored Voltage) (250)

Part NumberReset Thresh.
Reset OuttRESETWatchdog FeatureWatchdog TimeoutSupervisor FeaturesReset Thresh. Accur.
min@ +25°CmaxSee Notes
1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5
Active Low
Cap Adjustable
Input (WDI)
AdjustableManual Reset2.50.125
$2.33 @1k
Active Low
No Watchdog-
$1.86 @1k
Active Low
Open Drain
Cap Adjustable
Input (WDI)
$1.85 @1k
Active Low
Open Drain
No Watchdog-
$1.64 @1k

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.
Product Reliability Reports: MAX16058.pdf 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

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.

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