Low-Voltage, High-Accuracy, Quad Window Monitor in Small TQFN Package

1.5% Accurate, Quad Window Monitor Provides Precision Monitoring

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The MAX16008/MAX16009 are adjustable quad window voltage detectors in a small thin QFN package. These devices are designed to provide a higher level of system reliability by monitoring multiple supply voltages and providing a fault signal when any of the voltages exceed their overvoltage thresholds or fall below their undervoltage thresholds.

These devices offer user-adjustable thresholds that allow voltages to be monitored down to 0.4V. These devices allow the upper and lower trip thresholds of each window detector to be set externally with the use of three external resistors.

Each monitored threshold has an independent opendrain output for signaling a fault condition. The outputs can be wire OR'ed together to provide a single fault output. The open-drain outputs are internally pulled up with a 30µA current, but can be externally driven to other voltage levels for interfacing to other logic levels.

Both devices feature a margin input to disable the outputs during margin testing or any other time after power-up operations. The MAX16009 offers a reset output that deasserts after a reset timeout period after all voltages are within their threshold specifications. The reset timeout is internally set to 140ms (min), but can be externally adjusted to other reset timeouts using an external capacitor. In addition, the MAX16009 offers a manual reset input.

All devices are offered in a 4mm x 4mm TQFN package and are fully specified from -40°C to +125°C.
MAX16008, MAX16009: Typical Operating Circuit MAX16008, MAX16009: Typical Operating Circuit Enlarge+

Key Features

  • Monitor Four Undervoltage/Overvoltage Conditions
  • 1.5% Accuracy Over Temperature
  • User-Adjustable Thresholds (Down to 0.4V)
  • Open-Drain Outputs with Internal Pullups Reduce the Number of External Components
  • Manual Reset Input (MAX16009)
  • Margin Enable Input
  • Fixed or Adjustable Active-Low RESET Timeout (MAX16009)
  • Guaranteed Correct Output Logic State Down to VCC = 1V
  • Fully Specified from -40°C to +125°C
  • Small, 4mm x 4mm TQFN Package


  • Multivoltage ASICs
  • Networking/Telecommunication Equipment
  • Servers
  • Storage Equipment

See parametric specs for Supervisors (4 Monitored Voltages) (22)

Part NumberInterfaceReset Thresh.
Reset OuttRESETWatchdog FeatureSupervisor FeaturesReset Thresh. Accur.
min@ +25°CmaxSee Notes
MAX16008 R/C Adjustable
0 to 1.2
1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5
Active Low
Open Drain
With Internal Pull-Up
Adjustable Reset Input
Overvoltage/Window Monitor
$5.52 @1k
1ms to 15ms
15ms to 85ms
85ms to 300ms
300ms to 1s
No Watchdog
Adjustable Reset Input
Manual Reset
Overvoltage/Window Monitor
$5.12 @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: MAX16008.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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