LMX2541SQX2060E/NOPB

Clock Generators, PLLs, Frequency Synthesizers Overview

The LMX2541SQX2060E/NOPB is a PLLatinum ultra-low noise frequency synthesizer manufactured by Texas Instruments, originally part of the National Semiconductor portfolio. It integrates a voltage-controlled oscillator (VCO) and operates within an output frequency range of 32 MHz to 4 GHz. The device accepts input frequencies from 5 MHz to 6 GHz and requires a supply voltage between 3.15 V and 3.45 V. Designed for surface-mount installation, it utilizes a 36-WQFN package with dimensions of 6x6 mm. The component supports operation across a temperature range of -40°C to +85°C and draws approximately 120 mA during operation.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Ultra-low phase noise performance characteristic of the PLLatinum family
• Integrated Voltage-Controlled Oscillator (VCO) reduces external component count
• Wide output frequency range spanning 32 MHz to 4 GHz
• Single circuit configuration with differential or single-ended output options

Clock Generators, PLLs, Frequency Synthesizers Applications

• Wireless infrastructure base stations
• Point-to-point microwave radio systems
• Test and measurement equipment requiring low jitter clocks
• Satellite communication ground terminals

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the manufacturer designation as Texas Instruments, which acquired the National Semiconductor assets. Confirm the suffix 'NOPB' indicates lead-free and RoHS compliance. Ensure the specific sub-model suffix matches the required output frequency configuration, as variants exist for different frequency bands. Check moisture sensitivity level (MSL 3) requirements for storage and handling procedures.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when ultra-low phase noise is critical for system performance. The integrated VCO simplifies design but requires careful PCB layout for thermal management. Verify that the required output frequency falls within the 32 MHz to 4 GHz range. Consider the 36-WQFN package size for space-constrained applications. Ensure the power supply voltage remains strictly within the 3.15 V to 3.45 V window to maintain stability.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This device belongs to the LMX2541 series, a family of high-performance frequency synthesizers. The 'SQ' suffix typically denotes military-grade temperature range qualification (-40°C to +85°C). The 'X2060' or similar sub-suffixes often indicate specific factory configurations or binning for phase noise characteristics. It serves as a direct successor to older National Semiconductor PLL designs, offering improved integration and lower noise figures.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct replacements include other LMX2541 variants such as LMX2541SQ2060E/NOPB or LMX2541SQE2060E/NOPB, depending on the specific packaging and tape/reel requirements. Cross-reference with LMX2596 or LMX2572 if higher output frequencies or different noise profiles are needed, though pinouts and configurations may differ.