LMX2324TM

Clock Generators, PLLs, Frequency Synthesizers Overview

The LMX2324TM is a PLLatinum™ 2.0 GHz frequency synthesizer designed for RF personal communications, manufactured using TI's ABiC V BiCMOS process. It features an integrated 32/33 dual modulus prescaler and operates with a supply voltage range of 2.7V to 5.5V. The device typically consumes 3.5 mA at 3.0V. It supports differential or single-ended RF inputs up to 2.0 GHz and accepts CMOS/TTL oscillator inputs up to 40 MHz. Configuration is managed via a three-line MICROWIRE serial interface. The component is available in a 16-pin TSSOP package.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Integrated 32/33 dual modulus prescaler for high-frequency RF operation
• Internal balanced charge pump providing 4 mA output current
• MICROWIRE serial interface for programmable reference and feedback dividers
• Dual power-down modes (synchronous and asynchronous) for low current consumption

Clock Generators, PLLs, Frequency Synthesizers Applications

• Cellular telephone systems (GSM, NADC, CDMA, PDC)
• Personal wireless communications (DCS-1800, DECT, CT-1+)
• Wireless local area networks (WLANs)

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the obsolete status of the LMX2324TM before procurement planning. Confirm that the specific TMX suffix corresponds to the tape-and-reel packaging variant if required by assembly equipment. Ensure design-in reviews account for the discontinuation timeline and potential long-term availability constraints associated with legacy components.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when designing RF synthesizers requiring operation up to 2.0 GHz with low current consumption. Verify compatibility with the external voltage-controlled oscillator tuning range and ensure the loop filter design accommodates the internal 4 mA charge pump characteristics. Confirm that the system architecture supports the required MICROWIRE serial programming protocol for register configuration.

Clock Generators, PLLs, Frequency Synthesizers Part Context

The LMX2324 belongs to Texas Instruments' PLLatinum family of frequency synthesizers. It shares architectural similarities with the LMX2320 and LMX2323 but offers specific divider configurations suited for various cellular standards. The device represents a transition from National Semiconductor designs following TI's acquisition, maintaining the established PLLatinum performance metrics for mobile communication applications.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Publicly confirmed substitute part numbers are not provided in the source documentation. Due to the obsolete status, evaluate newer PLLatinum series devices or consult Texas Instruments sales representatives for recommended modern equivalents suitable for cellular and WLAN applications.