308MHz/315MHz/418MHz/433.92MHz Low-Power, FSK Superheterodyne Receiver

Please check latest availability status for a specific part variant.


The MAX7042 fully integrated, low-power, CMOS superheterodyne RF receiver is designed to receive frequency-shift-keyed (FSK) data at rates up to 66kbps nonreturn-to-zero (NRZ) (33kbps Manchester). The MAX7042 requires only a few external components to realize a complete wireless RF receiver at 308, 315, 418, and 433.92MHz.

The MAX7042 includes all the active components required in a superheterodyne receiver including a low-noise amplifier (LNA), an image-rejection (IR) mixer, a fully integrated phase-locked loop (PLL), local oscillator (LO), 10.7MHz IF limiting amplifier with received-signal-strength indicator (RSSI), low-noise FM demodulator, and a 3V regulator. Differential peak-detecting data demodulators are included for baseband data recovery.

The MAX7042 is available in a 32-pin TQFN and is specified over the automotive -40°C to +125°C temperature range.
MAX7042: Typical Application Circuit MAX7042: Typical Application Circuit Enlarge+

Key Features

  • +2.4V to +3.6V or +4.5V to +5.5V Single-Supply Operation
  • Four User-Selectable Carrier Frequencies 308, 315, 418, and 433.92MHz
  • -110dBm RF Input Sensitivity at 315MHz
  • -109dBm RF Input Sensitivity at 433.92MHz
  • Fast Startup (< 250µs)
  • Small 32-Pin TQFN Package
  • Low Operating Supply Current
    • 6.2mA Continuous
    • 20nA Power-Down
  • Integrated PLL, VCO, and Loop Filter
  • 45dB Integrated Image Rejection
  • Selectable IF BW with External Filter
  • Positive and Negative Peak Detectors
  • RSSI Output


  • Home and Office Lighting Control
  • Home Automation
  • Local Telemetry Systems
  • Remote Keyless Entry (RKE)
  • Remote Sensing
  • Security Systems
  • Smoke Alarms
  • Tire-Pressure Monitoring (TPM)
Part NumberRef. Clock Freq.
IF Output Freq.
ApplicationsSolutionsBand/ Freq.
(mm x mm)
MAX7042 <=17.63410.7
2.4 to 3.6
4.5 to 5.5
Garage Door Openers
Remote Controls
Remote Keyless Entry
Security Systems
Wireless Sensors
300MHz to 450MHz
Selectable 308/315/418/433.92MHz
300 to 4505.0 x 5.0
See All ISM RF Receivers (9)
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.

MAX7042EVKIT: Evaluation Kit for the MAX7042

Tools & Models

  • MAX7042 Gerber File
  • CAD Symbols and Footprints

  • MAX7042ATJ+
  • MAX7042ATJ+T
  • 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.

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