LMK5C33216ARGCR

Clock Generators, PLLs, Frequency Synthesizers Overview

The LMK5C33216A is a network synchronizer and jitter cleaner featuring three Digital Phase-Locked Loops (DPLLs) paired with three Analog Phase-Locked Loops (APLLs). It includes two differential or single-ended reference inputs supporting frequencies from 1Hz to 800MHz. The device provides sixteen differential outputs capable of generating up to twenty total frequency outputs when configured with LVCMOS options on GPIO pins. Output formats include HSDS, AC-LVPECL, LVDS, and HSCL, with frequencies ranging from 1Hz to 1250MHz. A proprietary Bulk Acoustic Wave (BAW) VCO in APLL3 delivers ultra-low jitter performance, specified at 40fs typical RMS jitter at 491.52MHz. The component operates within a temperature range of -40°C to 85°C and is housed in a 64-pin VQFN package.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Integrates three DPLLs and three APLLs for hitless switching and jitter attenuation with programmable loop bandwidth.
• Features a BAW-based APLL3 providing ultra-low phase noise and jitter performance independent of reference input characteristics.
• Supports digital holdover and hitless switching via reference validation circuitry monitoring primary and secondary inputs.
• Offers fully programmable output drivers with multiple voltage swing and common mode settings compliant with PCIe Gen standards.

Clock Generators, PLLs, Frequency Synthesizers Applications

• 4G and 5G Wireless Networks including Active Antenna Systems (AAS), mMIMO, and Remote Radio Units (RRU)
• SyncE, SONET/SDH, and IEEE-1588 PTP secondary clock synchronization
• Jitter cleaning and reference clock generation for 112G/224G PAM4 SerDes interfaces

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific ordering suffix against the manufacturer's current product folder to ensure correct packaging and tape-and-reel specifications. Confirm that the requested part number matches the exact pinout and thermal requirements for the target PCB layout. Cross-reference the revision history in the datasheet to account for any recent documentation updates or minor parameter adjustments before finalizing procurement orders.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this model when system design requires three independent synchronization domains with high-performance jitter cleaning capabilities. The integrated BAW VCO makes it suitable for applications demanding superior phase noise performance without external oscillators. Ensure the design accommodates the required power supply rails and thermal dissipation for the 64-pin VQFN package under maximum load conditions.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the LMK5C series of network synchronizers designed for wireless infrastructure. It serves as a higher-capacity alternative to the LMK5C22212A, offering additional output channels and an extra DPLL/APLL pair. The device complements the LMK5B series by providing enhanced digital control features and integrated EEPROM support for customized system startup configurations.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

The LMK5C33216AS1 is a compatible variant that includes an integrated IEEE 1588 PTP stack software solution. Designers requiring hardware-level protocol handling may consider this substitute. Other family members like the LMK5C33414A offer different input/output counts but maintain similar core architecture and performance metrics.