Microchip Technology ZL30640LDG1

Overview

ZL30640LDG1 from Microchip Technology is a high-precision time-signal fanout and phase/frequency measurement IC for telecom timing cards and PTP/IEEE 1588 systems. It supports up to 10 inputs (differential or single-ended, 1 kHz–250 MHz) and 20 outputs (10 differential + 10 CMOS), delivers <100 ps input-to-output alignment, and features dual DPLLs with 1 ps phase resolution for Ref-Sync and embedded Sync signal conversion in 5G baseband and packet network timing applications.

For engineers reviewing the ZL30640LDG1 datasheet, ZL30640LDG1 pinout, ZL30640LDG1 application, or ZL30640LDG1 equivalent, this device is selected for precise time-signal distribution, PPS-aligned clock generation, JESD204B SYSREF skew adjustment, and real-time phase monitoring across multi-domain telecom infrastructure where sub-200 ps alignment and jitter-critical synchronization are required.

Technical Context

The ZL30640LDG1 integrates two independent digital PLLs: one dedicated to buffer channel operation with programmable bandwidth (14–470 Hz), and another optimized for high-resolution input phase/frequency measurement (4e⁻¹⁵ frequency accuracy, 1 ps phase resolution). Its architecture enables simultaneous Ref-Sync locking and embedded Sync (ePPS) extraction from clocks between 0.5 Hz and 1 kHz.

It employs two any-frequency synthesizers supporting 0.5 Hz–500 MHz output range, with per-output phase/duty-cycle adjustment, glitchless enable/disable, and DC-coupled LVDS/LVPECL/CMOS output drivers. Input-to-output alignment is maintained below 200 ps using external feedback, and self-configuration occurs automatically from internal Flash at power-up.

Key Specifications

Pinout & Package

Package: 64-lead 9 mm × 9 mm VQFN (0.5 mm pitch), thermally enhanced with exposed E-pad (GND).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar time-signal fanout and phase measurement applications.

Compared with Si5342-D-EVB and LMK04832RHAR, the ZL30640LDG1 uniquely combines 10-input monitoring, dual-DPLL measurement, 20-output flexibility, and native Ref-Sync/ePPS conversion - making it the only solution for timing card companion roles in PTP-aware 5G and SyncE infrastructure.

Availability

ZL30640LDG1 is available at Aetrix Electronics and suitable for 5G radio unit timing, PTP boundary clock expansion, JESD204B baseband synchronization, and telecom timing-card phase diagnostics requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for ZL30640LDG1 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 provider of microcontrollers, analog, FPGA, and timing solutions, with leadership in precision timing, connectivity, and secure embedded control.

The ZL30640LDG1 belongs to Microchip's TimeBuffer™ family - engineered specifically for high-density, low-skew time-signal distribution and real-time phase analysis in telecom, networking, and wireless infrastructure equipment.

FAQ

What is the primary function of the ZL30640LDG1 in telecom timing systems?

The ZL30640LDG1 serves as a high-fanout time-signal buffer and phase/frequency measurement IC. In telecom timing systems, the ZL30640LDG1 distributes synchronized clocks and 1PPS signals from a master timing IC to multiple line cards or PHYs while simultaneously measuring input phase alignment with 1 ps resolution - enabling both distribution and diagnostics within a single device.

Does the ZL30640LDG1 support JESD204B clock and SYSREF generation?

Yes, the ZL30640LDG1 supports JESD204B-compliant clock and SYSREF signal generation. The ZL30640LDG1 provides per-output skew adjustment for SYSREF relative to the clock, enabling deterministic multi-device sampling in high-speed data converter systems - a key requirement for massive MIMO and radar baseband designs.

What oscillator frequency range does the ZL30640LDG1 require for optimal jitter performance?

The ZL30640LDG1 operates with oscillator frequencies from 9.72 MHz to 400 MHz, but optimal jitter performance requires ≥48 MHz. The ZL30640LDG1 achieves lowest phase noise and timing jitter when driven by a crystal or oscillator at or above 48 MHz - critical for meeting stringent SyncE and PTP Class C timing requirements.

Can the ZL30640LDG1 generate both PPS and embedded PPS (ePPS) outputs simultaneously?

Yes, the ZL30640LDG1 can generate both standard 1PPS and embedded PPS (ePPS) outputs simultaneously. Each differential output pair supports configurable wide/narrow pulse modes to indicate SYNC events, and the ZL30640LDG1 allows independent assignment of PPS, ePPS, or clock-only outputs across its 20 channels.

How many configuration profiles can be stored in the ZL30640LDG1's internal Flash memory?

The ZL30640LDG1 stores up to 7 factory-configurable power-on profiles in its internal nonvolatile Flash memory. These profiles are re-writeable and support automatic self-configuration at startup, allowing the ZL30640LDG1 to adapt to different system states or operational modes without host processor intervention.