LMX2430TMX

Clock Generators, PLLs, Frequency Synthesizers Overview

The LMX2430TMX is a dual high-frequency synthesizer from the PLLatinum family, designed for RF personal communications. It integrates two independent phase-locked loops: an RF synthesizer operating up to 3 GHz and an IF synthesizer operating up to 0.8 GHz. The device supports a supply voltage range of 2.25 V to 2.75 V with typical current consumption of 2.8 mA for the RF section and 1.4 mA for the IF section. It features programmable charge-pump currents (1 mA or 4 mA), Fastlock circuitry with integrated time-out counters, and a digital filtered lock-detect output. Control is managed via a 1.8-V Microwire serial interface.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Dual synthesizer architecture providing independent RF and IF frequency generation capabilities within a single package.
• Fastlock technology with integrated time-out counters enables rapid frequency switching requiring only a single word write operation.
• Programmable charge-pump current levels allow optimization of loop filter bandwidth and phase noise performance.
• Low-voltage logic interface compatible with 1.8-V systems, supporting direct connection to microcontrollers.

Clock Generators, PLLs, Frequency Synthesizers Applications

• Mobile handsets
• Cordless handsets
• Wireless data terminals

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific ordering suffix against the manufacturer's latest documentation to confirm package type and tape/reel specifications. Ensure the component meets RoHS compliance requirements for your assembly process. Cross-reference the full part number with official distributor catalogs to confirm availability and lead times prior to procurement.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select the LMX2430TMX when dual-loop synthesis is required for RF and IF stages in low-power mobile applications. Compare its 3 GHz RF limit against higher-frequency variants like the LMX2434 if wider bandwidth is needed. Evaluate the 2.25 V to 2.75 V supply constraint against system power rails and consider the TSSOP-20 package for surface-mount assembly compatibility.

Clock Generators, PLLs, Frequency Synthesizers Part Context

The LMX2430 belongs to the Texas Instruments PLLatinum family of dual high-frequency synthesizers. It shares architectural similarities with the LMX2433 and LMX2434, differing primarily in maximum operating frequencies and current consumption profiles. This series utilizes proprietary digital-phase locked-loop techniques to generate stable control signals for voltage-controlled oscillators in personal communication devices.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

The LMX2430TM/NOPB serves as a tube-packaged alternative to the TMX reel variant. Other family members include the LMX2433 and LMX2434, which offer higher frequency ranges but increased power consumption. Verify pinout and register compatibility before substituting with these related models.