LMX2335LSLBX/NOPB

Clock Generators, PLLs, Frequency Synthesizers Overview

The LMX2335LSLBX/NOPB is a PLLatinum low-power dual frequency synthesizer designed for RF personal communications. It integrates two high-frequency prescalers and operates on a 2.7V to 5.5V supply. The device features selectable synchronous and asynchronous power-down modes with typical current consumption of 1 µA. It includes dual modulus prescalers (64/65 or 128/129) and a second reference divider chain for improved system noise performance. Fabricated using a 0.5µm BiCMOS process, it supports selectable charge pump TRI-STATE mode and Fastlock mode.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Dual frequency synthesizer architecture with integrated high-frequency prescalers
• Ultra-low current consumption with selectable power-down modes
• Configurable dual modulus prescaler options for flexible frequency synthesis
• Second reference divider chain included to enhance system noise performance

Clock Generators, PLLs, Frequency Synthesizers Applications

• RF personal communication systems
• Wireless local loop applications
• Frequency synthesizer designs requiring low power consumption

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific suffix 'SLBX' against official Texas Instruments documentation to confirm package type and tape-and-reel specifications. Confirm RoHS compliance status via the manufacturer's datasheet. Check for obsolescence notices as this component family may have been superseded by newer iterations within the PLLatinum series.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when designing RF systems requiring dual synthesizers in a compact surface-mount package. Ensure the design accommodates the 2.7V to 5.5V operating voltage range. Verify that the required frequency range aligns with the internal prescaler capabilities and that the low-power shutdown features meet the system's standby requirements.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part belongs to the National Semiconductor PLLatinum family, now managed by Texas Instruments after acquisition. The LMX2335 series was specifically engineered for portable RF applications where power efficiency and integration are critical. The 'L' variant denotes low-power characteristics compared to standard versions.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Official substitutes include LMX2335LTM/NOPB and LMX2335M/NOPB. Verify pin compatibility and electrical parameters before substitution. Newer generations such as the LMX2594 offer wider bandwidth but differ significantly in architecture and application scope.