LMX2434TMX/NOPB

Clock Generators, PLLs, Frequency Synthesizers Overview

The LMX2434TMX/NOPB is a dual high-frequency synthesizer from the PLLatinum family, designed for RF and IF voltage-controlled oscillators. It features an integrated dual-modulus prescaler with selectable ratios of 32/33 or 16/17 for the RF section and 8/9 or 16/17 for the IF section. The device operates on a supply voltage ranging from 2.25 V to 2.75 V. Key electrical parameters include an RF operating frequency range up to 5 GHz and an IF operating frequency range up to 2.5 GHz. Power consumption is specified at 4.6 mA for the RF synthesizer and 2.4 mA for the IF synthesizer under typical conditions.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Proprietary digital phase-locked-loop technology generates stable, low-noise control signals for RF and IF applications.
• Integrated fastlock circuitry with time-out counters enables single-word write power-up and frequency changes.
• Dual programmable charge pumps allow independent current level selection for both RF and IF synthesizers.

Clock Generators, PLLs, Frequency Synthesizers Applications

• Mobile handsets
• Cordless handsets
• Wireless data systems
• Cable TV tuners

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific package variant (ULGA or TSSOP) required for the design, as the base part number covers multiple physical packages. Confirm that the ordering suffix matches the desired reel packaging format. Ensure the component meets RoHS compliance requirements for the target assembly process.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this model when an RF output frequency up to 5 GHz is required, distinguishing it from the lower-frequency LMX2430 and LMX2433 variants. Consider the available prescaler options (32/33 or 16/17) for the RF loop to ensure compatibility with the desired division ratios. Verify that the system logic levels are compatible with the 1.8-V MICROWIRE interface.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Texas Instruments LMX243x series, which includes the LMX2430 and LMX2433 models. These devices share a common architecture and feature set but differ in their maximum operating frequencies. The LMX2434 specifically targets higher frequency applications within the personal communications spectrum compared to its siblings.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

LMX2430TMX/NOPB

Clock Generators, PLLs, Frequency Synthesizers FAQ

What prescaler ratios are supported by the LMX2434?

The LMX2434 supports a 32/33 or 16/17 prescale ratio for the RF synthesizer and an 8/9 or 16/17 prescale ratio for the IF circuitry.

How does the Fastlock feature function?

Fastlock utilizes integrated time-out counters to allow the device to power up or change frequencies with only a single word write to the internal registers.

What is the logic interface voltage level?

The device features a 1.8-V MICROWIRE logic interface, allowing direct connection to 1.8-V devices via DATA, LE, and CLK pins.