LMX2371SLBX

Clock Generators, PLLs, Frequency Synthesizers Overview

The LMX2371SLBX is a PLLatinum low power frequency synthesizer designed for RF personal communications. It operates as a fractional-N synthesizer with an integrated VCO, supporting frequencies up to 550 MHz. The device features a programmable charge pump and loop filter interface to optimize phase noise and spurious performance. It includes a reference divider and feedback dividers for flexible frequency planning. The component is housed in a surface-mount package suitable for portable applications requiring low power consumption and high spectral purity.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Integrated voltage-controlled oscillator (VCO) eliminates external components
• Fractional-N architecture enables fine frequency resolution
• Low power operation optimized for battery-powered devices
• Programmable charge pump supports various loop filter configurations

Clock Generators, PLLs, Frequency Synthesizers Applications

• RF personal communication systems
• Portable wireless devices
• Frequency synthesis in mobile handsets
• Base station transceivers

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the manufacturer origin as National Semiconductor or Texas Instruments, as TI acquired NS. Confirm the suffix SLBX indicates the specific tape and reel packaging variant. Ensure the part number matches the exact frequency range and package type required for your design. Check for RoHS compliance status if environmental regulations apply to your production.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when a low-power, integrated solution is needed for RF frequency synthesis in the sub-600 MHz range. Consider the integrated VCO for simplified board layout and reduced component count. Evaluate the phase noise specifications against your system's sensitivity requirements. Ensure the supply voltage and current consumption align with your battery life targets.

Clock Generators, PLLs, Frequency Synthesizers Part Context

The LMX2371 belongs to the PLLatinum family of frequency synthesizers from National Semiconductor, now under Texas Instruments. This series is known for combining low power consumption with high performance in a compact form factor. The LMX2371 specifically targets applications where size and energy efficiency are critical constraints in RF front-end design.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct substitutes may include other parts from the LMX23xx series, such as the LMX2306 or LMX2316, depending on the required frequency range. Verify pin compatibility and register settings before substitution. Cross-reference with Texas Instruments' official replacement guides for updated recommendations.