LMX2487SQ/NOPB

Clock Generators, PLLs, Frequency Synthesizers Overview

The LMX2487SQ/NOPB is a dual PLLatinum frequency synthesizer manufactured by Texas Instruments, originally developed under the National Semiconductor brand. It integrates two phase-locked loops: a high-performance delta-sigma fractional-N PLL covering an output frequency range of 1 GHz to 6 GHz, and a dedicated integer-N PLL operating up to 3 GHz. The device utilizes silicon technology and operates within a supply voltage range of 2.5 V to 3.6 V. Designed for surface-mount installation, it is housed in a 24-WQFN package with dimensions of 4x4 mm. The component supports CMOS inputs and outputs and functions reliably across an industrial temperature range from -40°C to +85°C.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Dual PLL architecture combining a 1-GHz to 6-GHz delta-sigma fractional-N synthesizer with a 3-GHz integer-N synthesizer
• Low power consumption with a typical operating current of 5.7 mA at 3.3 V
• CMOS input and output interfaces compatible with standard digital logic levels
• Compact 24-pin WQFN (4x4 mm) surface-mount package design

Clock Generators, PLLs, Frequency Synthesizers Applications

• RF personal communications systems
• Wireless local loop infrastructure
• Point-to-point microwave radio links
• Base station frequency synthesis

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the PLLatinum family of frequency synthesizers. While originally associated with National Semiconductor, the part is now produced and distributed by Texas Instruments following their acquisition. The 'NOPB' suffix indicates a lead-free, halogen-free compliant version of the device. It serves as a higher-frequency variant within the series compared to parts like the LMX2486 or LMX2485.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

The LMX2487ESQ/NOPB is a verified alternative within the same product line, offering an extended maximum output frequency of 7.5 GHz while maintaining the same 24-WQFN footprint and electrical interface specifications.