LMX2331LTMX

Clock Generators, PLLs, Frequency Synthesizers Overview

The LMX2331LTMX is a monolithic dual frequency synthesizer from the PLLatinum family, designed for RF personal communications. It integrates two high-frequency prescalers and utilizes a 0.5µ ABiC V silicon BiCMOS process. The device supports selectable synchronous and asynchronous powerdown modes with typical current consumption of 1 µA. It features dual modulus prescalers (64/65 or 128/129) and includes a second reference divider chain to improve system noise performance. Operating voltage ranges from 2.7V to 5.5V.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Dual frequency synthesizer architecture with integrated high-frequency prescalers
• Ultra-low current consumption with selectable powerdown modes
• Configurable dual modulus prescaler options for flexible loop design
• Second reference divider chain included for enhanced noise performance

Clock Generators, PLLs, Frequency Synthesizers Applications

• RF personal communication systems requiring dual phase-lock loops
• Mobile devices utilizing low-power frequency synthesis
• Wireless infrastructure components needing compact PLL solutions

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific suffix 'TMX' against official National Semiconductor documentation to confirm tape-and-reel packaging status. Ensure compatibility with the 0.5µ ABiC V process specifications when sourcing replacements. Cross-reference the exact part number with Texas Instruments archives post-acquisition to validate manufacturing data integrity.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component for applications requiring dual independent frequency synthesizers in a small-outline plastic surface-mount package. Consider the 2.7V to 5.5V operating range for power supply design. Evaluate the selectable charge pump current levels and Fastlock mode availability against system timing requirements.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part belongs to the LMX233x series of low-power dual frequency synthesizers. It is compatible with and an upgrade to the earlier LMX2335/36 models. The device is fabricated using National Semiconductor's proprietary ABiC V technology, offering CMOS compatibility and reduced size compared to discrete solutions.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

The LMX2335L and LMX2336L are documented as compatible upgrades within the same product line. Verify pinout and electrical parameter equivalence before substitution.