LMX2433TMX/NOPB

Clock Generators, PLLs, Frequency Synthesizers Overview

The LMX2433TMX/NOPB is a dual high-frequency synthesizer from the PLLatinum family, designed for RF and IF voltage-controlled oscillators. It operates on a single supply voltage ranging from 2.25 V to 2.75 V with typical current consumption of 3.2 mA for the RF synthesizer and 2 mA for the IF synthesizer. The device features two independent phase-locked loops: an RF loop supporting frequencies up to 3.6 GHz and an IF loop up to 1.7 GHz. Both loops utilize a proprietary digital phase-lock technique and include dedicated fastlock circuitry with integrated time-out counters. The unit is housed in a 20-pin ULGA package measuring 3.50 mm by 3.50 mm.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Dual synthesizer architecture with independent RF and IF loops
• Proprietary digital phase-lock technique for stable control signals
• Integrated fastlock circuitry with time-out counters for rapid frequency switching
• Low-voltage logic interface compatible with 1.8-V devices

Clock Generators, PLLs, Frequency Synthesizers Applications

• Mobile handsets
• Cordless handsets
• Wireless data systems
• Cable TV tuners

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific suffix TMX indicates tape-and-reel packaging when sourcing this component. Confirm that the NOPB designation ensures compliance with RoHS standards and absence of lead. Cross-reference the manufacturer part number against official datasheets to ensure the correct revision level is obtained for design compatibility.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this model when a dual-loop synthesizer is required within the 3.6 GHz RF and 1.7 GHz IF range. Ensure the application supports the specified 2.25 V to 2.75 V supply voltage. Consider the ULGA package dimensions if board space is constrained. Verify that the 1.8-V MICROWIRE interface aligns with the system's control logic levels.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the LMX243x series, which includes the LMX2430 and LMX2434 variants. These devices share the same PLLatinum technology and functional block diagram but differ in maximum operating frequencies and power consumption profiles. The LMX2433 serves as the mid-range option in terms of frequency coverage compared to its siblings.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

LMX2430TMX/NOPB offers lower frequency limits (3 GHz RF / 0.8 GHz IF) with reduced current consumption. LMX2434TMX/NOPB provides higher frequency capabilities (5 GHz RF / 2.5 GHz IF) at the cost of increased power usage. Both are direct pin-compatible alternatives within the same package.