LMX2306TMX/NOPB

Clock Generators, PLLs, Frequency Synthesizers Overview

The LMX2306TMX/NOPB is an obsolete monolithic frequency synthesizer from the PLLatinum family, designed for RF personal communications. It operates on a 2.3V to 5.5V supply and features a digital phase-locked loop with an 8/9 dual modulus prescaler. The device supports a maximum input frequency of 550 MHz and includes programmable reference (R) and feedback (N) counters. Key electrical parameters include a typical power supply current of 1.7 mA at 3V and a power-down current of 1 μA. It utilizes a MICROWIRE serial interface for configuration and offers selectable FastLock modes and charge pump tri-state capabilities.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Integrates a digital phase-locked loop with an 8/9 dual modulus prescaler for stable low-noise signal generation.
• Features ultra-low current consumption with programmable synchronous or asynchronous power-down modes.
• Includes selectable FastLock modes to optimize settling time and phase noise performance dynamically.
• Provides a digital lock detect output and a configurable charge pump with tri-state functionality.

Clock Generators, PLLs, Frequency Synthesizers Applications

• Portable wireless communications systems such as PCS and PCN
• Cordless telephones and other wireless communication devices
• Wireless local area networks (WLANs)
• Cable TV tuners (CATV)

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

This component is officially classified as obsolete by Texas Instruments. Verify availability through secondary market distributors or surplus suppliers. Confirm that the specific revision matches legacy design requirements. Ensure proper electrostatic discharge handling during storage and assembly due to limited built-in ESD protection.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this part only for legacy designs requiring the specific 550 MHz input range and 8/9 prescaler architecture. Compare against modern replacements if new development is possible. Consider the impact of the obsolete status on long-term supply continuity. Evaluate alternative PLLatinum series devices if higher frequencies or updated packaging are required.

Clock Generators, PLLs, Frequency Synthesizers Part Context

The LMX2306 belongs to the PLLatinum family of low-power frequency synthesizers, alongside the LMX2316 and LMX2326. These devices share a common architectural foundation but differ in their maximum operating frequencies and prescaler configurations. The TMX suffix indicates a tape-and-reel packaging format within the TSSOP-16 package family.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Public datasheets list the LMX2316 and LMX2326 as related parts within the same family. No direct pin-compatible substitutes are explicitly confirmed in the provided documentation. Consult manufacturer resources for modern equivalents suitable for new designs.