ZL30671LFG7

Overview

The ZL30671 is a single-channel system synchronizer featuring one Digital Phase-Locked Loop (DPLL) and five output frequency families. It accepts up to ten differential or CMOS inputs ranging from 0.5Hz to 900MHz and generates outputs from <0.5Hz to 1045MHz. The device supports ITU-T G.8262, G.813, and G.8273.2 timing compliance with programmable bandwidths from 0.1mHz to 470Hz. Key electrical parameters include input jitter measurement resolution of 1ps, output jitter typically less than 1ps RMS for fractional dividers, and power consumption of 1.3W under standard operating conditions.

Feature Summary

• Single DPLL channel with programmable bandwidth (0.1mHz to 470Hz) and high-resolution holdover averaging.
• Five output frequency families including two low-jitter synthesizers (<1ps RMS jitter) and one general-purpose synthesizer.
• Supports up to ten inputs (0.5Hz-900MHz) with per-input phase adjustment and REF+SYNC locking capabilities.
• Integrated local oscillator support for TCXO/OCXO frequencies (23.75-125MHz) without external loop filters.

Applications

• Central system timing ICs for Synchronous Ethernet (SyncE) and SyncE+1588 networks.
• SONET/SDH and OTN carrier-grade synchronization systems.
• Wireless base station timing distribution.
• G.8262/813 EEC/SEC and Telcordia Stratum 2-4 compliant equipment.

Procurement Notes

Verify the specific ordering suffix LFG7 corresponds to the 80-lead LGA package variant. Confirm that internal Flash memory configuration scripts are required for automatic self-configuration at power-up. Ensure compatibility with SPI or I2C processor interfaces for system integration.

Selection Notes

Select this model when only one DPLL channel is required for reference selection and synthesis. Compare against ZL30672 and ZL30673 if additional DPLL channels are needed for complex multi-reference architectures. Verify that the 80-lead LGA package dimensions fit the target PCB layout constraints.

Part Context

This component belongs to the ZL3067x family of system synchronizers, which includes the ZL30672 (2-channel) and ZL30673 (3-channel). All variants share identical input/output structures and synthesizer architectures but differ in the number of integrated DPLL channels available for reference management.

Replacement Considerations

Direct functional replacements within the same product line include the ZL30672LFG7 and ZL30673LFG7, which offer increased DPLL channel counts while maintaining the same package and interface specifications.

FAQ

What is the maximum frequency supported by CMOS inputs?

CMOS inputs support frequencies up to 180MHz, while differential inputs can handle frequencies up to 900MHz.

Does the ZL30671 require external components for the DPLL loop filter?

No, the device features an easy-to-configure design that requires no external VCXO or loop filter components.

How does the device handle reference switching?

It provides truly hitless reference switching with support for both revertive and nonrevertive switching algorithms.