ZL30791LFG7

Overview

The ZL30791LFG7 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 generated by two low-jitter synthesizers and one general-purpose synthesizer. The device supports physical-layer compliance with ITU-T G.8262 and packet-timing compliance with ITU-T G.8261 and G.8273.2. It operates within an industrial temperature range of -40°C to +85°C and utilizes an 80-lead LGA package.

Feature Summary

• Single DPLL channel for packet and physical-layer synchronization
• Ten inputs accepting any frequency from 0.5Hz to 900MHz
• Five output frequency families with jitter typically <1ps RMS
• Compliance with ITU-T G.8262, G.8261, and G.8273.2 standards

Applications

• Central system timing ICs for SyncE and IEEE 1588
• SONET/SDH and OTN carrier-grade systems
• Wireless base station timing for 5G applications

Procurement Notes

Verify the specific ordering suffix 'LFG7' corresponds to the 80-lead LGA tray packaging configuration. Confirm that the internal Flash memory self-configuration requirements align with the target system's power-up sequence. Ensure the host processor interface matches the supported SPI or I2C protocols defined in the datasheet.

Selection Notes

Select this model when only one DPLL channel is required for synchronization tasks. Compare against the ZL30795 and ZL30793 if additional channels are needed for complex multi-reference architectures. Evaluate the input frequency range requirements, noting the 180MHz limit for CMOS inputs versus the 900MHz capability for differential pairs.

Part Context

This component belongs to the ZL3079x family of packet clock network synchronizers. It shares architectural similarities with the ZL30795 and ZL30793 models, differing primarily in the number of integrated DPLL channels. The family is designed for high-precision timing in telecommunications infrastructure.

Replacement Considerations

Public confirmed substitute part numbers: ZL30795LFG7, ZL30793LFG7.