LMX2326SLBX/NOPB

Clock Generators, PLLs, Frequency Synthesizers Overview

The LMX2326SLBX/NOPB is an obsolete monolithic PLLatinum frequency synthesizer designed for RF personal communications. It operates within a supply voltage range of 2.3V to 5.5V and features ultra-low current consumption, drawing approximately 4.7mA at 3V in normal operation. The device incorporates a 32/33 dual modulus prescaler and supports programmable or logical power-down modes with typical standby current of 1μA. It utilizes a MICROWIRE serial interface for configuration and includes selectable charge pump tri-state and FastLock modes. The component is housed in a 16-pin TFQFN package.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Integrated digital phase-locked loop architecture utilizing a 32/33 dual modulus prescaler for stable local oscillator signal generation.
• Configurable MICROWIRE serial interface supporting programmable reference and feedback dividers for precise frequency synthesis.
• FastLock mode capability enabling dynamic adjustment of loop bandwidth to achieve rapid frequency transitions while maintaining low phase noise.
• Programmable power-down functionality allowing selection between synchronous and asynchronous modes to minimize active power dissipation.

Clock Generators, PLLs, Frequency Synthesizers Applications

• Portable wireless communications systems including PCS and PCN handsets
• Wireless Local Area Networks (WLANs)
• Cable TV tuners (CATV)
• Pager devices

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify component obsolescence status prior to procurement as the LMX2326SLBX/NOPB is classified as obsolete by Texas Instruments. Confirm availability through authorized distributors or secondary market suppliers. Ensure strict adherence to electrostatic discharge handling protocols during storage and assembly due to limited built-in ESD protection inherent to the silicon BiCMOS process.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component for applications requiring low-power frequency synthesis up to 2.8GHz where CMOS input/output compatibility is necessary. Evaluate the specific current consumption requirements against the 4.7mA typical draw at 3V. Consider the available FastLock modes if rapid channel switching is required. Verify that the 16-pin TFQFN package dimensions fit the target PCB layout constraints.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part belongs to the LMX2306/16/26 family of PLLatinum low-power frequency synthesizers. While the LMX2306 and LMX2316 share similar architectures, the LMX2326 is distinguished by its higher maximum operating frequency of 2.8GHz compared to the 550MHz and 1.2GHz limits of its siblings. All variants utilize the same 16-pin TSSOP or PLGA packaging and share identical control logic and interface specifications.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. As the component is marked obsolete, engineers should consult Texas Instruments for recommended modern replacements within the LMX2xxx series or equivalent high-frequency synthesizers.