LMX2541SQX3740E/NOPB

Clock Generators, PLLs, Frequency Synthesizers Overview

The LMX2541SQX3740E/NOPB is an ultra-low noise PLLatinum frequency synthesizer with an integrated voltage-controlled oscillator (VCO), manufactured by Texas Instruments. It operates within a supply voltage range of 3.15 V to 3.45 V and supports input frequencies from 5 MHz to 6 GHz, generating output frequencies between 32 MHz and 4 GHz. The device features a single circuit configuration housed in a 36-WQFN package with an exposed pad, suitable for surface mount technology. It functions reliably across an operating temperature range of -40°C to +85°C and draws approximately 120 mA during operation.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Integrates an ultra-low noise voltage-controlled oscillator (VCO) to minimize phase noise performance.
• Supports external VCO bypass options for flexible system design requirements.
• Features programmable digital logic for precise frequency synthesis control via SPI interface.

Clock Generators, PLLs, Frequency Synthesizers Applications

• Wireless communication infrastructure equipment
• Test and measurement instruments requiring low jitter clocks
• Point-to-point microwave radio systems

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific suffix 'X3740' against official Texas Instruments documentation to confirm pinout and electrical characteristics match your design requirements. Ensure compatibility with standard WQFN-36 footprints and validate that the 3.15 V to 3.45 V supply range aligns with your power management scheme before finalizing procurement.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when ultra-low phase noise is critical for signal integrity in high-frequency applications. Consider the 36-WQFN package size for space-constrained designs and verify that the 6 GHz maximum input frequency meets your reference clock specifications. Evaluate thermal dissipation needs given the 120 mA operating current in the exposed pad package.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part belongs to the LMX2541 family of PLLatinum frequency synthesizers, designed for high-performance RF applications. The SQ designation indicates automotive-grade qualification, while the X3740 suffix typically denotes a specific tape-and-reel packaging variant or internal revision code defined by Texas Instruments for mass production distribution.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct replacements include other LMX2541 variants such as LMX2541SQ2060E/NOPB or LMX2541SQX2690E/NOPB, provided the packaging and suffix specifications are compatible. Verify register compatibility and pinout equivalence before substitution to ensure seamless integration without hardware redesign.

Clock Generators, PLLs, Frequency Synthesizers FAQ

What is the maximum input frequency supported by the LMX2541?

The LMX2541 supports a maximum input frequency of 6 GHz, allowing flexibility in reference clock selection for various synthesizer configurations.

Does the LMX2541 support external VCO operation?

Yes, the device allows for an external VCO option where the internal VCO can be bypassed, providing additional design flexibility for specific frequency ranges or noise requirements.

What is the operating temperature range for this component?

The LMX2541SQX3740E/NOPB is rated for an extended industrial temperature range of -40°C to +85°C, ensuring reliable operation in demanding environments.