LMX2335MX

Clock Generators, PLLs, Frequency Synthesizers Overview

The LMX2335MX is a monolithic, integrated dual frequency synthesizer fabricated using National Semiconductor’s 0.5µ ABiC V silicon BiCMOS process. Designed for RF personal communications requiring two RF phase-lock loops, it integrates two high-frequency prescalers and dual modulus prescalers (64/65 or 128/129). The device operates within a supply voltage range of 2.7V to 5.5V. It features selectable synchronous and asynchronous powerdown modes with typical current consumption of 1µA. Additional capabilities include selectable charge pump TRI-STATE mode, adjustable charge pump current levels, and Fastlock mode.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Dual modulus prescaler selection: 64/65 or 128/129
• Ultra-low current consumption with selectable powerdown modes (1µA typ)
• Integrated second reference divider chain for improved system noise
• Small-outline plastic surface mount TSSOP package

Clock Generators, PLLs, Frequency Synthesizers Applications

• RF Personal Communications systems
• Applications requiring dual RF phase-lock loops

Clock Generators, PLLs, Frequency Synthesizers Part Context

The LMX2335MX belongs to the PLLatinum family of low-power dual frequency synthesizers. It is an upgrade and compatible variant of the standard LMX2335/LMX2336 series. The 'MX' suffix typically denotes the TSSOP surface-mount package configuration used in this specific part number.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

The LMX2335L is a documented low-power variant within the same family. The LMX2335 serves as the base model for compatibility upgrades.