ZL30771LFG7

Overview

The ZL30771LFG7 is a single-channel IEEE 1588 and Synchronous Ethernet packet clock network synchronizer manufactured by Microchip Technology. It features one Digital Phase-Locked Loop (DPLL) channel, ten input reference pins supporting frequencies from 0.5Hz to 900MHz, and five output frequency families including two low-jitter synthesizers and one general-purpose synthesizer. The device operates within a temperature range of -40°C to +85°C and utilizes an 80-lead LGA package measuring 11 x 11 mm. It supports programmable bandwidths from 0.1mHz to 470Hz and provides per-DPLL phase adjustment with 1ps resolution.

Feature Summary

• Single DPLL channel for packet and physical-layer synchronization compliant with ITU-T G.8262, G.8261.1, and IEEE 1588 standards.
• Ten input reference pins accepting CMOS or differential signals up to 900MHz with per-input phase adjustment.
• Five output frequency families: two low-jitter synthesizers (Synth1, Synth2) and one general-purpose synthesizer (Synth0).
• Internal Flash memory for automatic self-configuration at power-up without external components.

Applications

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

Procurement Notes

Verify the ordering suffix 'LFG7' corresponds to the 80-lead LGA package in trays. Confirm the specific revision level matches the November 2019 product brief documentation. Ensure compatibility with 1.8V and 3.3V core VDD voltages during integration planning.

Selection Notes

Select the ZL30771LFG7 when only one DPLL channel is required for synchronization tasks. Compare against ZL30772LFG7 and ZL30773LFG7 if additional channels are needed for complex multi-reference architectures. Evaluate output jitter requirements, as Synth1 and Synth2 offer <0.3ps RMS jitter for integer dividers.

Part Context

This component belongs to the ZL3077x family of packet clock network synchronizers, which also includes the dual-channel ZL30772 and triple-channel ZL30773 variants. All models share similar architectural features but differ in the number of available DPLL channels and output configurations.

Replacement Considerations

Direct functional replacements within the same package include the ZL30772LFG7 and ZL30773LFG7, provided additional channels are acceptable. Verify pinout compatibility and software configuration scripts when migrating between these family members.

FAQ

What is the maximum input frequency supported by the ZL30771LFG7?

The device accepts input clock frequencies ranging from 0.5Hz to 900MHz. However, CMOS inputs are limited to a maximum of 180MHz.

Does the ZL30771LFG7 require external VCXO or loop filter components?

No, the design is completely encapsulated and requires no external VCXO or loop filter components for operation.

What is the output jitter performance for the low-jitter synthesizers?

Output jitter from Synth1 and Synth2 integer dividers is less than 0.3ps RMS. Jitter from fractional dividers is typically less than 1ps RMS, with many frequencies achieving less than 0.5ps RMS.