LMX2305WG/B

Clock Generators, PLLs, Frequency Synthesizers Overview

The LMX2305WG/B is a fractional-N frequency synthesizer manufactured by Rochester Electronics, LLC. It operates within a frequency range of up to 1.4 GHz and supports a reference input frequency of up to 80 MHz. The device utilizes a BICMOS technology node and is housed in a 36-lead Very Thin Profile Quad Flat No-Lead (QFN) package measuring 6 mm x 6 mm with a height of 0.80 mm. It functions as a single PLL frequency synthesizer designed for applications requiring precise frequency generation.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Fractional-N architecture supporting high-resolution frequency synthesis
• Integrated phase-locked loop (PLL) with VCO output up to 1.4 GHz
• Low voltage operation with supply voltage range of 2.8 V to 3.2 V
• Commercial temperature grade rated from -40 °C to +85 °C

Clock Generators, PLLs, Frequency Synthesizers Applications

• Wireless communication systems requiring local oscillator signals
• Test and measurement equipment needing stable frequency references
• Broadband data transmission interfaces

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific suffix 'B' against the manufacturer's official documentation to confirm if it denotes a specific tape-and-reel quantity, lead finish variant, or environmental compliance status. Ensure the QFN-36 footprint matches the target PCB design constraints. Confirm that the commercial temperature range meets the operational requirements of the end application.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when a compact, low-voltage fractional-N synthesizer is required for frequencies up to 1.4 GHz. Compare power consumption specifications against system budget constraints. Verify that the 36-lead QFN package is compatible with available assembly processes and thermal management strategies for the 6x6mm form factor.

Clock Generators, PLLs, Frequency Synthesizers Part Context

Rochester Electronics typically sources and distributes obsolete or lifecycle-end components originally manufactured by other semiconductor companies. The LMX2305 series generally originates from National Semiconductor or Texas Instruments. This part represents a continuation of supply for legacy designs rather than a current primary product line offering.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Check for direct pin-compatible replacements such as the LMX2305WGE or LMX2305WG. Evaluate alternative fractional-N synthesizers from the same family with different package options if the QFN-36 is unavailable. Verify electrical parameter equivalence before substitution.