LMX2531LQ1515E/NOPB

Clock Generators, PLLs, Frequency Synthesizers Overview

The LMX2531LQ1515E/NOPB is a high-performance PLL frequency synthesizer system manufactured by Texas Instruments, continuing the lineage of National Semiconductor products. It operates within an output frequency range of 553 MHz to 3.132 GHz and supports input frequencies between 765 MHz and 1.636 GHz. The device functions on a 2.8 V to 3.2 V supply voltage and is housed in a 36-pin WQFN package with exposed pad. Designed for commercial applications, it withstands operating temperatures from -40°C to +85°C.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Integrated Voltage Controlled Oscillator (VCO) reduces external component count
• High-performance Phase Locked Loop (PLL) architecture for RF synthesis
• Compact 36-WQFN (6x6 mm) surface-mount package

Clock Generators, PLLs, Frequency Synthesizers Applications

• Wireless communication systems
• RF transceivers
• Test and measurement equipment

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the manufacturer designation as Texas Instruments, which acquired National Semiconductor's analog division. Confirm the specific suffix 'LQ1515' corresponds to the intended frequency plan or calibration variant. Ensure compliance with RoHS directives and AEC-Q100 qualification if automotive reliability is required. Check moisture sensitivity level (MSL 3) requirements for PCB assembly processes.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when a compact, integrated PLL synthesizer with an internal VCO is required for frequencies up to 3.132 GHz. Compare against other LMX2531 variants based on specific output frequency coverage and phase noise specifications. Ensure the 36-pin WQFN footprint matches the design layout constraints.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part belongs to the LMX2531 family of high-performance frequency synthesizers. Originally developed under National Semiconductor before its acquisition by Texas Instruments, these devices are designed to replace discrete PLL solutions. The 'NOPB' suffix indicates lead-free packaging compliant with environmental standards.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct replacements include other LMX2531 variants such as LMX2531LQ1570E/NOPB or LMX2531LQ1700E/NOPB, depending on specific frequency requirements. Verify pin compatibility and electrical parameters before substitution.