TRF6903 is not recommended for new designs.
This product continues to be in production to support existing customers. Please consider one of these alternatives:
Similar but not functionally equivalent to the compared device:
CC1101 ACTIVE Low-power Sub-1 GHz wireless transceiver This product has more integration with increased functionality and improved performance.

Product details


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  • Single-Chip RF Transceiver for 315-MHz, 433-MHz, 868-MHz, and 915-MHz Industrial, Scientific, and Medical (ISM) Bands
  • 2.2-V to 3.6-V Operation
  • Low Power Consumption
  • FSK/OOK Operation
  • Integer-N Synthesizer With Fully Integrated Voltage Controlled Oscillator (VCO)
  • On-Chip Reference Oscillator and Phase-Locked Loop (PLL)
  • Power Amplifier With 8-dBm Typical Output Power
  • Programmable Brownout Detector
  • Clock Recovery With Integrated Data Bit Synchronizer and Baud Rate Selection
  • Linear Receive Strength Signal Indicator (RSSI)
  • Flexible 3-Wire Serial Interface
  • Minimal Number of External Components Required
  • 48-Pin Low-Profile Plastic Quad Flat Package (PQFP)
  • Programmable XTAL Trimming
  • Lock Detect Indicator
  • Programmable Training Sequence Recognition
  • Pin Compatible to the TRF6901

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The TRF6903 single-chip solution is an integrated circuit intended for use as a low-cost multiband FSK or OOK transceiver to establish a frequency-programmable, half-duplex, bidirectional RF link. The multichannel transceiver is intended for digital (FSK, OOK) modulated applications in the North American and European 315-MHz, 433-MHz, 868-MHz, and 915-MHz ISM bands. The single-chip transceiver operates down to 2.2 V and is designed for low power consumption. The synthesizer has a typical channel spacing of better than 200 kHz and features a fully-integrated VCO. Only the PLL loop filter is external to the device.

Two fully-programmable operation modes, Mode0 and Mode1, allow extremely fast switching between two preprogrammed settings (for example, receive (RX)/transmit (TX); TX_frequency_0/TX_frequency_1; RX_frequency_0/RX_frequency_1; …) without reprogramming the device.

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Technical documentation

= Top documentation for this product selected by TI
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Type Title Date
* Datasheet Single-Chip Multiband RF Transceiver datasheet (Rev. D) May 25, 2005
Technical articles Bluetooth® Low Energy shifts gears for car access Jul. 15, 2019
Technical articles Top 3 design challenges that the new generation of SimpleLink™ Wi-Fi® devices will help you overcome Feb. 21, 2019
Technical articles Exploring the impact of IoT on innovation Jul. 17, 2018
Technical articles An out-of-the-box Internet of Things: building a seamless and secure smart home network Jun. 12, 2018
Application note ISM-Band and Short Range Device Regulatory Compliance Overview Jun. 08, 2005

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Software development

SWRC006A.ZIP (1376 KB)

Design tools & simulation

RF Transceiver Power Consumption Calculator
RF-POWERCALC This tool can be used to estimate the average power consumption for both receive and transmit modes of operation for basic wireless links. The tool will calculate separate current consumption figures along with expected battery life for transmit and receive modes of operation.
TRF6903 EasyRF™ Tool
TRF6903EASYRF Calculates values for PLL filter, LNA, PA matching, Crystal switch caps, IF matching, and S&H capacitors.

Reference designs

Frequency Hopping Spread Spectrum (FHSS) Wireless UART Chipset Reference Design
DOLPHIN-WUART-REF Dolphin is a Frequency Hopping Spread Spectrum (FHSS) Wireless UART chipset for the 902-928 MHz US ISM Band. The Dolphin chipset is a FCC pre-certified reference design and consists of the TRF6903 RF transciever and the digital baseband ASIC DBB03. The DBB03 contains the firmware for the Dolphin (...)

CAD/CAE symbols

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Ordering & quality

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Support & training

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