ZL30772LFG7

Overview

The ZL30772LFG7 is a dual-channel IEEE 1588 and Synchronous Ethernet packet clock network synchronizer manufactured by Microchip Technology. It features two Digital Phase-Locked Loops (DPLLs) and supports up to ten differential or CMOS inputs ranging from 0.5Hz to 900MHz. The device generates output frequencies from less than 0.5Hz to 1045MHz with high-resolution fractional frequency conversion achieving 0ppm error. It operates within an industrial temperature range of -40°C to +85°C and is housed in an 80-lead LGA package measuring 11 x 11 mm.

Feature Summary

• Dual DPLL channels for physical-layer and packet timing synchronization
• Supports ITU-T G.8262, G.8261.1, G.813, and G.8273.2 compliance
• Up to 16 single-ended or 8 differential outputs with jitter <0.3ps RMS
• Programmable bandwidth from 0.1mHz to 470Hz with hitless switching

Applications

• Central system timing ICs for SyncE and IEEE 1588 networks
• SONET/SDH and OTN carrier-grade systems
• Wireless base station timing for 5G applications
• G.8262/813 EEC/SEC implementations

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm package type and lead finish specifications. Confirm that the component meets RoHS requirements and check for any active Product Change Notifications (PCNs) related to manufacturing site or material changes prior to procurement.

Selection Notes

Select the ZL30772LFG7 when two independent DPLL channels are required for reference redundancy or distinct timing domains. Ensure input frequencies do not exceed 900MHz for differential signals or 180MHz for CMOS inputs. Verify that the application requires the 80-lead LGA package format and operates within the specified -40°C to +85°C temperature range.

Part Context

This component belongs to the ZL3077x family of packet clock network synchronizers. The ZL30771 variant provides one DPLL channel, while the ZL30773 variant offers three channels. All variants share identical output capabilities and input architectures, differing primarily in the number of available phase-locked loops.

Replacement Considerations

The ZL30771LFG7 and ZL30773LFG7 are pin-compatible alternatives within the same series. Selection depends on whether one or three DPLL channels are sufficient for the design requirements.

FAQ

What is the maximum input frequency supported by the ZL30772LFG7?

The device accepts input frequencies from 0.5Hz up to 900MHz for differential pairs, with a maximum of 180MHz for CMOS inputs.

Does the ZL30772LFG7 require external loop filter components?

No, the device features an easy-to-configure, encapsulated design that does not require external VCXO or loop filter components.

What is the output jitter performance of the synthesizers?

Output jitter from Synthesizers 1 and 2 integer dividers is less than 0.3ps RMS, while fractional divider jitter is typically less than 1ps RMS.