LMX2331LTM/NOPB

Clock Generators, PLLs, Frequency Synthesizers Overview

The LMX2331LTM/NOPB is a PLLatinum low power dual frequency synthesizer IC manufactured by Texas Instruments. It operates with a supply voltage of 3V and supports output frequencies up to 2GHz, with an input reference frequency capability of 510MHz. The device is housed in a 20-TSSOP package measuring 4.40mm in width. It utilizes a fully integrated delta-sigma PLL and VCO architecture fabricated on a 0.5µ ABiC IV silicon BiCMOS process. Key internal components include dual modulus prescalers available in 64/65 or 128/129 configurations, enabling precise frequency synthesis for RF applications.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Integrates a fully delta-sigma phase-locked loop and voltage-controlled oscillator within a single chip
• Features dual modulus prescalers for flexible frequency division ratios
• Designed for low power consumption suitable for portable RF systems

Clock Generators, PLLs, Frequency Synthesizers Applications

• RF personal communication devices
• Wireless local loop equipment
• Mobile phone base stations

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific suffix 'NOPB' indicates lead-free status and RoHS compliance as per Texas Instruments documentation. Confirm the 'LTM' variant corresponds to the standard tube packaging rather than tape-and-reel options when ordering. Ensure the 20-TSSOP footprint matches the target PCB design constraints before finalizing procurement.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component for designs requiring a dual synthesizer solution with low power requirements. The 3V operation makes it suitable for battery-powered applications. Consider the 2GHz maximum output frequency limit against system requirements. The integrated VCO reduces external component count compared to discrete solutions.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part belongs to the PLLatinum family of dual frequency synthesizers from Texas Instruments. It shares architectural similarities with the LMX2330 and LMX2332 models but offers specific performance characteristics tailored for RF personal communications. The series is known for its integration of PLL and VCO functions to minimize board space.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

The LMX2331LTMCX/NOPB serves as a direct pin-compatible alternative offering tape-and-reel packaging instead of the tube format used by the LTM variant. Other members of the PLLatinum family may require schematic adjustments due to differing pinouts or electrical specifications.