LMX2316TM/NOPB

Clock Generators, PLLs, Frequency Synthesizers Overview

The LMX2316TM/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 2.5mA at 3V in normal operation and 1μA in powerdown mode. The device incorporates a 32/33 dual modulus prescaler and supports a maximum oscillator input frequency of 40MHz (or 100MHz at higher voltages). It utilizes a MICROWIRE serial interface for configuration and includes selectable charge pump tri-state and FastLock modes with timeout counters.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Integrated digital phase-locked loop architecture with a 32/33 dual modulus prescaler for stable local oscillator generation.
• Programmable reference and N counters allowing precise frequency synthesis via a three-wire MICROWIRE serial interface.
• FastLock capability enabling dynamic bandwidth adjustment for rapid frequency transitions while maintaining low phase noise.
• Flexible power management with synchronous and asynchronous programmable powerdown modes controlled by the CE pin.

Clock Generators, PLLs, Frequency Synthesizers Applications

• Portable wireless communications systems including PCS and PCN handsets
• Cordless telephony applications
• 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 authorized distributors or secondary markets. Confirm that the specific package variant matches your board layout requirements. Ensure compliance with end-of-life transition plans for long-term production stability.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this model when designing for the 1.2GHz RF band using a 32/33 prescaler topology. Compare against the LMX2306 if an 8/9 prescaler is required, or the LMX2326 for 2.8GHz operations. Evaluate the FastLock feature set if fast channel switching is critical to the system performance requirements.

Clock Generators, PLLs, Frequency Synthesizers Part Context

The LMX2316 belongs to the PLLatinum family of low-power frequency synthesizers from Texas Instruments. It shares the same functional block diagram and interface protocols with the LMX2306 and LMX2326, differing primarily in the integrated prescaler division ratios and target RF operating frequencies.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. As the device is obsolete, engineering teams should evaluate newer generations of PLLatinum synthesizers or equivalent components from other manufacturers that support the required 1.2GHz frequency range and 32/33 prescaler specifications.