ZL30793LFG7

Overview

The ZL30793LFG7 is a triple-channel IEEE 1588 and Synchronous Ethernet packet clock network synchronizer manufactured by Microchip Technology. It integrates three Digital Phase-Locked Loops (DPLLs) to provide physical-layer and packet-based frequency, phase, and time synchronization. The device accepts up to ten differential or CMOS inputs ranging from 0.5Hz to 900MHz and generates output frequencies from less than 0.5Hz to 1045MHz. Key electrical parameters include an operating temperature range of -40°C to +85°C, supply voltages of 1.8V and 3.3V, and output jitter typically below 1ps RMS for fractional dividers. It utilizes an 80-lead LGA package.

Feature Summary

• Triple DPLL architecture supporting hitless reference switching between physical and packet sources with programmable bandwidth from 0.1mHz to 470Hz.
• High-resolution synthesizers providing any-to-any frequency conversion with 0ppm error and output jitter typically under 1ps RMS.
• Supports ITU-T G.8262, G.8263, G.8273.2, and IEEE 1588-2008/2018 standards for carrier-grade timing applications.
• Integrated Time Synchronization Algorithm enabling sub-100ns alignment for 5G wireless and precise UTC/GNSS traceability.

Applications

• Central system timing ICs for SyncE, SONET/SDH, OTN, and wireless base stations.
• 5G wireless infrastructure requiring sub-100ns time and phase alignment.
• Carrier-grade systems compliant with ITU-T G.8262/813 EEC/SEC and Telcordia Stratum 2-4 specifications.

Procurement Notes

Verify the component origin as Microchip Technology, formerly Microsemi. Confirm the specific ordering suffix 'LFG7' corresponds to the 80-lead LGA tray packaging and NiAu finish. Ensure the design accounts for the required host processor interface (SPI or I2C) and local oscillator connections (TCXO/OCXO).

Selection Notes

Select the ZL30793LFG7 when three independent DPLL channels are required for complex synchronization topologies. Compare against ZL30791 (1-channel) and ZL30795 (2-channel) if fewer channels suffice. Verify that the input frequency range up to 900MHz and output requirements up to 1045MHz align with the system's clock distribution needs.

Part Context

This part belongs to the ZL3079x family of Network Synchronizer PLLs, which also includes the ZL30791 and ZL30795 variants. The family is designed for high-performance timing in telecommunications and data center environments, offering integrated software algorithms for IEEE 1588 and SyncE compliance.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult official Microchip resources for current lifecycle status and potential obsolescence notices before finalizing procurement plans.

FAQ

What is the maximum input frequency supported by the ZL30793LFG7?

The device accepts input clocks with any frequency from 0.5Hz up to 900MHz.

Does the ZL30793LFG7 support IEEE 1588-2018?

Yes, the integrated Time Synchronization Algorithm supports IEEE 1588-2018 Annex J.5 High Accuracy Profile.

How many DPLL channels does this model contain?

The ZL30793LFG7 contains three full-featured DPLL channels.