SI5382A-E-GMR

Clock Generators, PLLs, Frequency Synthesizers Overview

The Si5382A-E-GMR is a multi-DSPLL wireless jitter attenuator and clock multiplier designed for wireless infrastructure. It integrates two any-frequency DSPLLs in a 64-lead 9x9 mm QFN package. The device supports differential input frequencies from 8 kHz to 750 MHz and LVCMOS inputs up to 250 MHz. Maximum output frequencies reach 2.94912 GHz for CPRI clocks via DSPLL_B and 735 MHz for other differential outputs. It provides ultra-low RMS jitter, typically 72 fs at 122.88 MHz on DSPLL_B. Operating voltage ranges are 1.8 V ±5% for the core and 3.3 V ±5% for analog supplies.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Integrates two digital silicon phase-locked loops (DSPLLs) to replace discrete VCXO-based solutions
• Supports simultaneous Ethernet, CPRI, and general-purpose clocking within a single chip
• Features automatic free-run and holdover modes with programmable history averaging
• Includes hitless and glitchless input switching capabilities for seamless transitions

Clock Generators, PLLs, Frequency Synthesizers Applications

• Wireless Infrastructure Baseband Units (BBU)
• Distribution Units (DU) in cellular networks
• eCPRI Remote Radio Head (RRH) systems
• Test and Measurement equipment requiring low-jitter clocks

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet revision to ensure compatibility with required packaging options. Confirm that the device meets all necessary environmental compliance standards for the intended deployment region before finalizing procurement orders.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this model when only two independent PLL channels are required for CPRI and Ethernet applications. Verify that the input frequency requirements do not exceed 750 MHz for differential signals. Ensure the design accommodates the 64-QFN thermal pad requirements for proper heat dissipation during operation.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Si5381/82 family of multi-DSPLL wireless jitter attenuators. While the Si5381 variant includes four DSPLLs, the Si5382 specifically integrates two DSPLLs optimized for cost-sensitive or lower-channel-count wireless timing architectures.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct replacement options include the Si5381A-E-GMR, which offers additional DSPLL channels. Verify pinout compatibility and software configuration migration using ClockBuilder Pro tools when transitioning between these family members.