Microchip Technology ZL30633LDG1

Overview

ZL30633LDG1 from Microchip Technology is a carrier-grade, multi-channel clock synchronizer IC with five independent timing channels, eight DPLLs (including NCO-hybrid and split-XO modes), and support for up to 10 differential or CMOS inputs and 20 CMOS/differential outputs. It delivers 100 fsRMS typical output jitter at 156.25 MHz (12 kHz–20 MHz), <0.9W core power consumption, and full ITU-T G.8262/G.8262.1 compliance - deployed in SyncE+1588 central timing systems for 5G RRU and OTN line cards.

For engineers reviewing the ZL30633LDG1 datasheet, ZL30633LDG1 pinout, ZL30633LDG1 application, or ZL30633LDG1 equivalent, key selection criteria include its five-channel any-to-any frequency conversion (0.5 Hz–750 MHz), MiToDSync™ 1-wire time-of-day interface, per-output 1 ps phase adjustment, and 64-pin VQFN package with DC-coupled LVDS/LVPECL/CMOS output compatibility.

Technical Context

The ZL30633LDG1 implements a hybrid timing architecture combining up to eight digitally controlled DPLLs (five for I/O channels, one NCO-hybrid for SyncE assist, two for OCXO split-XO locking) with five independent low-jitter synthesizers. Each DPLL supports programmable bandwidth (0.1 mHz–470 Hz), phase-slope limiting, and hitless reference switching compliant with G.8262.1 Stratum 3E.

Input monitoring includes per-pin 1 ps resolution phase measurement and activity detection; outputs support dual-frequency 2xCMOS mode (e.g., OUT3P = 125 MHz, OUT3N = 25 MHz), glitchless enable/disable, and embedded Sync (1PPS, 2/8 kHz) or MiToDBasic™ 3-wire ToD signaling on dedicated pins.

Key Specifications

Pinout & Package

Package: 64-lead 9 mm × 9 mm VQFN (0.5 mm pitch), thermally enhanced E-pad, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar multi-channel clock synchronizer applications.

Compared with Si5341-B-GM and ICS85411AGI-01LFT, the ZL30633LDG1 uniquely delivers five independent DPLL-controlled channels with G.8262.1 Stratum 3E certification, split-XO OCXO support, and integrated MiToDSync™ - making it the only option for carrier-class 5G RRU and OTN transport timing where holdover stability and 1PPS phase alignment are mandatory.

Availability

ZL30633LDG1 is available at Aetrix Electronics and suitable for 5G wireless infrastructure, Synchronous Ethernet line cards, and OTN transport terminals requiring stable component supply, long-term lifecycle support, and full ITU-T compliance documentation.

Supply support for ZL30633LDG1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Microchip Technology is a U.S.-based semiconductor company specializing in microcontrollers, analog devices, and timing solutions, with global design centers and manufacturing partnerships.

The ZL30633LDG1 belongs to Microchip's ZL3063x family of carrier-grade clock synchronizers, engineered specifically for telecom infrastructure demanding G.8262.1 Stratum 3E compliance, multi-channel independence, and seamless SyncE+1588 co-timing.

FAQ

What is the maximum number of independent timing channels supported by the ZL30633LDG1?

The ZL30633LDG1 supports up to five independent clock channels, each with dedicated DPLL and synthesizer resources. This allows simultaneous generation of distinct frequency/phase domains for RF, baseband, fronthaul, and backhaul subsystems in 5G infrastructure - confirmed in DS20006634A-page 1 and Figure 1-1 block diagram. The ZL30633LDG1 variant is explicitly rated for five channels per product brief and pin diagram documentation.

Does the ZL30633LDG1 support IEEE 1588 Precision Time Protocol synchronization?

Yes, the ZL30633LDG1 supports IEEE 1588 via its MiToDSync™ 1-wire time-of-day interface, which carries frequency, phase, and ToD information, and its ability to lock to 1PPS inputs with sub-nanosecond phase resolution. It generates synchronized 1PPS outputs and integrates with 1588 algorithms through DPLL1 and Synth3 in the reference application (Figure 2-1). The ZL30633LDG1 is designed for SyncE+1588 central timing systems per DS20006634A-page 2.

What package type and pin count does the ZL30633LDG1 use?

The ZL30633LDG1 uses a 64-lead 9 mm × 9 mm VQFN package with 0.5 mm pitch and an exposed thermal pad (E-pad), as shown in Figure 1 on DS20006634A-page 5. This package is shared across the ZL30631–ZL30635 family and supports high-density routing for telecom line cards. Pin functions are fully documented in the datasheet pin diagram and match the ZL30633LDG1 ordering variant.

Can the ZL30633LDG1 generate different frequencies on paired CMOS outputs (e.g., OUTxP and OUTxN)?

Yes, in 2xCMOS mode, the ZL30633LDG1 allows OUTxP and OUTxN to operate at different frequencies - for example, OUT3P at 125 MHz and OUT3N at 25 MHz (integer divisor relationship). This is explicitly stated in DS20006634A-page 4 under "Output Clock Features" and enabled per-output via register configuration. The ZL30633LDG1's synthesizer architecture supports this dual-frequency capability without external dividers.

Is the ZL30633LDG1 compliant with ITU-T G.8262 and G.8262.1 standards?

Yes, the ZL30633LDG1 is fully compliant with ITU-T G.8262 (SyncE) and G.8262.1 (Enhanced SyncE) for Stratum 3E, verified through internal characterization and documented in DS20006634A-page 1 Features list and Section 3.3 DPLL Features. Its eight-DPLL architecture, programmable bandwidth, and holdover performance (<0.01 ppb) meet all G.8262.1 requirements for carrier-grade timing equipment - a key differentiator of the ZL30633LDG1.