ZL30661LFG7

Overview

The ZL30661LFG7 is a single-channel line card timing IC from Microchip Technology, housed in an 80-lead LGA package. It supports up to 10 differential or CMOS inputs ranging from 1kHz to 900MHz and provides 18 outputs with frequencies from <1Hz to 1045MHz. The device integrates one DPLL channel, two low-jitter synthesizers (Synth1, Synth2), and one general-purpose synthesizer (Synth0). Key specifications include programmable bandwidth (14Hz to 470Hz), per-DPLL phase adjustment with 1ps resolution, and output jitter typically less than 1ps RMS for fractional dividers. It operates within a temperature range of -40°C to +85°C.

Feature Summary

• Single DPLL channel with programmable bandwidth (14Hz to 470Hz) and high-resolution holdover averaging.
• Supports up to 10 input clocks (1kHz to 900MHz) with automatic/manual reference switching and hitless transitions.
• Generates 18 outputs via three synthesizers: two low-jitter (Synth1/2) and one general-purpose (Synth0).
• Features 1ps resolution for per-input, per-DPLL, and per-output phase adjustments.

Applications

• Synchronous Ethernet (SyncE) line cards.
• SONET/SDH and OTN systems.
• Wireless base station timing.
• IEEE 1588 Precision Time Protocol implementations.

Procurement Notes

Verify the specific ordering suffix 'LFG7' corresponds to the 80-lead LGA tray packaging and NiAu finish as documented. Confirm that the single-channel configuration matches system requirements, as the family also includes dual and triple-channel variants. Ensure compatibility with the required SPI or I2C interface settings during integration.

Selection Notes

Select this part when only one DPLL channel is required for reference selection and holdover. Compare against ZL30662 and ZL3663 if multiple independent timing domains are needed. Verify that the 10-input capacity and 18-output distribution meet the board's clocking topology without requiring additional buffer components.

Part Context

This component belongs to the ZL3066x family of line card timing ICs, which also includes the ZL30662 (2-channel) and ZL30663 (3-channel). All variants share the same 80-lead LGA package and core architecture but differ in the number of integrated DPLL channels available for reference management.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Designers should consult Microchip for current availability and potential obsolescence notices regarding the ZL30661LFG7.