ZL30773LFG7

Overview

The ZL30773LFG7 is a triple-channel IEEE 1588 and Synchronous Ethernet packet clock network synchronizer from Microchip Technology. It integrates three Digital Phase-Locked Loops (DPLLs) to provide physical-layer and packet-timing synchronization for carrier-grade systems. The device accepts up to ten differential or CMOS inputs ranging from 0.5Hz to 900MHz and generates output frequencies from <0.5Hz to 1045MHz. Key specifications include programmable bandwidth (0.1mHz to 470Hz), hitless reference switching, and high-resolution holdover averaging. It operates within a -40°C to +85°C temperature range and is housed in an 80-lead LGA package.

Feature Summary

• Triple DPLL architecture supporting one, two, or three independent channels for comprehensive timing synchronization.
• Supports ITU-T G.8262, G.8261.1, G.813, G.812, Telcordia GR-1244, and GR-253 physical-layer compliance standards.
• Accepts up to 10 input clocks with any frequency from 0.5Hz to 900MHz and provides per-input phase adjustment with 1ps resolution.
• Generates output frequencies from <0.5Hz to 1045MHz with low jitter (<0.3ps RMS for integer dividers) and supports multiple output formats including LVDS, LVPECL, HCSL, and CMOS.

Applications

• Central system timing ICs for SyncE and/or IEEE 1588 networks.
• SONET/SDH and OTN carrier-grade systems.
• Wireless base station timing infrastructure requiring sub-100ns time/phase alignment.
• G.8262/813 EEC/SEC and Telcordia Stratum 2-4 applications.

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to ensure correct packaging and material specifications. Confirm that the required channel count matches the ZL30773 variant, as the family includes single and dual-channel options. Ensure compatibility with the 80-lead LGA footprint during PCB layout. Check for any recent product change notifications regarding pinout or electrical parameters before finalizing procurement.

Selection Notes

Select the ZL30773LFG7 when three independent DPLL channels are required for complex synchronization topologies. Compare against ZL30771 and ZL30772 if fewer channels suffice to optimize cost and power. Evaluate the need for specific output voltage levels (1.5V to 3.3V) and interface types (LVDS, CMOS, etc.) to ensure proper configuration. Consider the programmable bandwidth and holdover performance requirements for the target application environment.

Part Context

The ZL30773LFG7 belongs to the ZL3077x family of packet clock network synchronizers, which also includes the ZL30771 (1-channel) and ZL30772 (2-channel). All variants share similar architectural features but differ in the number of integrated DPLL channels. This family is designed for high-performance timing applications in telecommunications and data center infrastructure.

Replacement Considerations

Direct functional replacements within the same package and feature set are limited to other members of the ZL3077x family (ZL30771, ZL30772) if channel count allows. Verify pin-to-pin compatibility and software register map consistency when substituting between these models. No other cross-family substitutes are confirmed in the provided documentation.