315MHz/390MHz Dual-Frequency ASK Transmitter

Transmit 315MHz/390MHz with One Crystal While Keeping Your Antenna Matched


The MAX7058 UHF transmitter alternatively transmits ASK/OOK data at 315MHz or 390MHz using a single crystal. The MAX7058 has internal tuning capacitors at the output of the power amplifier that can be programmed for matching to the antenna or load. The MAX7058 can transmit at a data rate up to 100kbps NRZ (50kbps Manchester coded). Typical transmitted power into a 50Ω load is +10dBm. The MAX7058 operates from +2.1V to +3.6V and draws under 8.0mA of current. The standby current is less than 1µA at room temperature. A 15MHz crystal is used as the reference for 315MHz and 390MHz operation by selecting synthesizer-divide ratios of 21 and 26, respectively.

The MAX7058 is available in a 4mm × 4mm, 24-pin thin QFN package and is specified to operate in the –40°C to +125°C automotive temperature range.
MAX7058: Functional Block Diagram MAX7058: Functional Block Diagram Enlarge+

Key Features

  • Switched 315MHz/390MHz Carrier Frequency Using One Crystal
  • +2.1V to +3.6V Single-Supply Operation
  • ASK/OOK Modulation
  • Internal Switched Capacitors for Optimum Dual-Frequency Operation
  • 8.0mA DC Current Drain (50% Duty Cycle OOK)
  • 0.8µA Standby Current
  • Small 4mm x 4mm, 24-Pin Thin QFN Package


  • Garage Door Openers
  • Home Automation
  • RF Remote Controls
  • Security Systems
  • Wireless Sensors
Part Number Solutions Applications Band/ Freq.
(mm x mm)
Package/Pins Budgetary
See Notes
MAX7058  300 to 450MHz-ISM RKE
Garage Door Openers
Home Automation
ISM (Europe)
RF Remote Controls
Security Systems
300 to 450 4.0 x 4.0
$1.36 @1k
See All ISM RF Transmitters (12)
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.

MAX7058EVKIT: Evaluation Kit for the MAX7058

Tools & Models

CAD and Layout
MAX7058 Gerber File

Related Resources

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