TRF3761-DIRHAR

Clock Generators, PLLs, Frequency Synthesizers Overview

The TRF3761-DIRHAR is a low-noise integer-N PLL frequency synthesizer with an integrated VCO, housed in a 40-pin QFN package. It operates on a single supply voltage ranging from 4.5V to 5.25V and supports an operating temperature range of -40°C to +85°C. The device features a reference input frequency range of 10MHz to 104MHz and provides VCO output divided by 1, 2, or 4 options. For the TRF3761-D variant, the direct VCO frequency range spans from 1740MHz to 1866MHz.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Fully integrated voltage-controlled oscillator (VCO) with low phase noise characteristics
• Integer-N PLL architecture with programmable charge pump current
• Flexible output frequency selection via divide-by-1, divide-by-2, or divide-by-4 options
• Hardware and software power-down capabilities for power-sensitive applications

Clock Generators, PLLs, Frequency Synthesizers Applications

• WCDMA, CDMA, and GSM wireless infrastructure
• Wideband transceiver systems
• Wireless local loop equipment
• RFID transceivers
• Clock generation and IF LO generation

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific ordering suffix 'DIRHAR' against the manufacturer's official documentation to confirm the tape and reel quantity and package marking details. Ensure the component matches the required thermal pad specifications and humidity sensitivity level for your assembly process. Cross-reference the part number with the latest Texas Instruments product folder to confirm availability status and any potential obsolescence notices.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select the TRF3761-D variant specifically when the application requires a VCO frequency range between 1740MHz and 1866MHz. Consider the divide-by-1, 2, or 4 output options based on the target system frequency requirements. Evaluate the phase noise performance at 600kHz offset to ensure it meets the system's spectral purity needs. Verify that the 3-wire serial interface is compatible with the host microcontroller.

Clock Generators, PLLs, Frequency Synthesizers Part Context

The TRF3761 family consists of highly integrated frequency synthesizers optimized for high-performance applications. The TRF3761-D is one of several variants within this family, distinguished by its specific VCO frequency range. Other variants include TRF3761-A through TRF3761-J, each covering different frequency bands. All variants share the same core architecture, including the integer-N PLL and integrated VCO, but differ in their tuned frequency ranges.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct replacements within the TRF3761 family include TRF3761-AIRHAR, TRF3761-BIRHAR, TRF3761-CIRHAR, TRF3761-EIRHAR, TRF3761-FIRHAR, TRF3761-GIRHAR, TRF3761-HIRHAR, and TRF3761-JIRHAR. These parts share the same package and pinout but offer different VCO frequency ranges. Ensure the replacement part's frequency range aligns with the design requirements.