Microchip Technology ZL30641LDG1S

Overview

ZL30641LDG1S from Microchip Technology is a carrier-grade line card timing IC with five independent clock channels, supporting up to 10 differential or CMOS inputs and 20 CMOS / 10 differential outputs. It delivers 100 fsRMS typical output jitter at 156.25 MHz (12 kHz–20 MHz), <0.9W core power consumption, and 1 ps resolution for input/output phase measurement and adjustment - deployed in SyncE+1588 routers, OTN systems, and 5G wireless base stations.

For engineers reviewing the ZL30641LDG1S datasheet, ZL30641LDG1S pinout, ZL30641LDG1S application, or ZL30641LDG1S equivalent, this device is selected for telecom timing systems requiring hitless reference switching, Ref-Sync locking, MiToDSync time-of-day transport, and PCIe Gen 1–5 clock synthesis with sub-200 ps input-to-output alignment.

Technical Context

The ZL30641LDG1S integrates up to eight DPLLs - five dedicated to clock I/O channels, one NCO-hybrid mode for SyncE assist, and two for split-XO OCXO locking - enabling programmable bandwidth (5 Hz–470 Hz), phase-slope limiting, and holdover compensation with aging/temperature learning. Each DPLL supports hitless switching and 1 ps phase adjustment.

Its five next-generation synthesizers provide any-to-any frequency conversion (0.5 Hz–750 MHz) with 0 ppm error, supporting LVDS/LVPECL/2xCMOS/HCSL outputs, per-output duty-cycle control, glitchless start/stop, and embedded Sync (1PPS, 2/8 kHz) or MiToDSync/MiToDBasic time-of-day signaling.

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 line card timing applications.

Compared with Si5341-B-GM and ICS8430-01T, the ZL30641LDG1S provides five full-featured DPLLs, MiToDSync ToD transport, sub-100 fsRMS jitter, and split-XO architecture - making it uniquely suited for new SyncE+1588 central timing designs requiring scalability, phase precision, and oscillator cost optimization.

Availability

ZL30641LDG1S is available at Aetrix Electronics and suitable for Synchronous Ethernet line cards, 5G base station DU/RRU modules, OTN transport terminals, and IEEE 1588 grandmaster clocks requiring stable component supply across multi-year production cycles.

Supply support for ZL30641LDG1S 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 global semiconductor company specializing in microcontrollers, analog devices, timing solutions, and security ICs - with deep expertise in telecom, aerospace, automotive, and industrial markets.

The ZL30641LDG1S belongs to Microchip's ZL family of carrier-grade timing ICs, engineered specifically for SyncE, IEEE 1588, and OTN infrastructure where jitter performance, phase accuracy, and reference resilience are mission-critical.

FAQ

What is the maximum number of independent clock channels supported by the ZL30641LDG1S?

The ZL30641LDG1S supports up to five independent clock channels, each with dedicated DPLL and synthesizer resources. This enables simultaneous frequency translation, jitter cleaning, and phase alignment across multiple network interfaces - such as SyncE egress, 1588 timestamping, and OTN client mapping - without resource contention or shared-loop degradation.

Does the ZL30641LDG1S support IEEE 1588 Precision Time Protocol synchronization?

Yes, the ZL30641LDG1S directly supports IEEE 1588 via its Ref-Sync capability: it locks to 1PPS + frequency inputs with sub-nanosecond phase alignment, generates precise 1PPS outputs, and transports time-of-day data using MiToDSync 1-wire or MiToDBasic 3-wire interfaces - all integral to ZL30641LDG1S's timing architecture.

Can the ZL30641LDG1S generate PCIe Gen5 reference clocks?

Yes, the ZL30641LDG1S synthesizes PCIe Gen5-compliant 100 MHz clocks with <100 fsRMS jitter (12 kHz–20 MHz) and supports spread-spectrum modulation per PCIe specification. Its per-output phase/duty-cycle control and glitchless start/stop ensure robust clock delivery to root complexes and endpoints in ZL30641LDG1S-based server and accelerator designs.

What oscillator types are compatible with the ZL30641LDG1S local clock input?

The ZL30641LDG1S accepts a single crystal oscillator or clock source from 9.72 MHz to 400 MHz, with ≥48 MHz recommended for lowest jitter. For ultra-low-jitter applications, it supports split-XO operation: a low-jitter XO as jitter reference and a TCXO/OCXO as stability reference - both connected to REF pins, as defined in ZL30641LDG1S's oscillator interface specification.

Is the ZL30641LDG1S pin-compatible with other members of the ZL3064x family?

Yes, the ZL30641LDG1S shares the same 64-pin 9 mm × 9 mm VQFN package and pinout with ZL30642–ZL30645, enabling hardware reuse across variants. Differences lie in DPLL count (ZL30641 has five DPLLs), feature enablement, and factory configuration - all managed via internal Flash and SPI/I²C, not pin strapping. This simplifies ZL30641LDG1S migration in existing board designs.