SOT Temperature Sensors with Period/Frequency Output

SOT23 Single Wire Digital Temperature Sensors

Please check latest availability status for a specific part variant.


The MAX6576/MAX6577 are low-cost, low-current temperature sensors with a single-wire output. The MAX6576 converts the ambient temperature into a square wave with a period proportional to absolute temperature (°K). The MAX6577 converts the ambient temperature into a square wave with a frequency proportional to absolute temperature. The MAX6576 offers accuracy of ±3°C at +25°C, ±4.5°C at +85°C, and ±5°C at +125°C. The MAX6577 offers accuracy of ±3°C at +25°C, ±3.5°C at +85°C, and ±4.5°C at +125°C.

Both devices feature a single-wire output that minimizes the number of pins necessary to interface with a microprocessor. The period/frequency range of the output square wave can be selected by hard-wiring the two time-select pins (TS0, TS1) to either VDD or GND. The MAX6576/MAX6577 are available in space-saving 6-pin SOT23 packages.
MAX6576, MAX6577: Typical Operating Circuit MAX6576, MAX6577: Typical Operating Circuit Enlarge+

Key Features

  • Simple Single-Wire Output
  • Two Output Types Available
    • Temperature to Period (µs) (MAX6576)
    • Temperature to Frequency (Hz) (MAX6577)
  • ±0.8°C Accuracy at +25°C (±3°C max)
  • No External Components
  • Operates from +2.7V to +5.5V Supply Voltage
  • Low 140µA Typical Supply Current
  • Standard Operating Temperature Range: -40°C to +125°C
  • Small 6-Pin SOT23 Package


  • Battery Packs
  • Cell Phones
  • Critical µP and µC Temperature Monitoring
  • Hard Drives/Tape Drives
  • Medical Equipment
  • Networking and Telecom Equipment
  • Portable Battery-Powered Equipment

See parametric specs for Temperature Sensors (113)

Part NumberSensor TypeInterfaceChannelsAccuracy
Parasite Pwr.Oper. Temp.
See Notes
MAX6576 LocalPeriod µ Temp.One3No-55 to +125
$1.09 @1k
MAX6577 Freq. µ Temp.
$0.91 @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.
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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