LMX2525LQ1321

Overview

The LMX2525LQ1321 is a PLLatinum dual frequency synthesizer system manufactured by National Semiconductor. It operates at a fixed output frequency of 1321MHz and integrates both the phase-locked loop (PLL) and voltage-controlled oscillator (VCO) into a single component. The device is designed for PDC RF applications and utilizes a 24-WQFN package with dimensions of 4x5mm. This integrated architecture simplifies circuit design by combining essential synthesis functions within a compact surface-mount form factor.

Feature Summary

• Integrates PLL and VCO functionality within a single chip
• Designed specifically for PDC RF applications
• Utilizes the PLLatinum series technology for frequency synthesis

Applications

• PDC RF systems
• Frequency synthesis circuits
• RF signal generation modules

Procurement Notes

Verify RoHS compliance status as the component is listed as non-compliant in available documentation. Confirm the specific manufacturer origin, noting historical attribution to National Semiconductor which may now fall under Texas Instruments. Ensure the 24-WQFN package variant matches the required PCB footprint. Check for any REACH regulation impacts relevant to the destination market before finalizing procurement orders.

Selection Notes

Select this component when a fixed 1321MHz output is required without external VCO tuning. The integrated PLL and VCO structure reduces board space compared to discrete solutions. Consider the 24-WQFN package constraints for thermal management and soldering processes. Verify that the PDC application requirements align with the device's specific performance characteristics documented in the official datasheet.

Part Context

This part belongs to the PLLatinum series of frequency synthesizers from National Semiconductor. The series is known for integrating complex RF functions to simplify system design. The LMX2525LQ1321 represents a specific configuration optimized for a single frequency point, distinguishing it from programmable variants within the same family line.

Replacement Considerations

Consult official substitution guides for equivalent parts within the PLLatinum family. Verify pin compatibility and electrical specifications against potential alternatives. No direct substitute part numbers are confirmed in the provided public data.