Skyworks Solutions Inc. SI540X-A-EVB

Overview

SI540X-A-EVB from Skyworks Solutions is an evaluation board for the Si540x family of NetSync™ Network Synchronizer clocks, supporting IEEE 1588 PTP and SyncE-compliant timing in 5G O-RAN, BBU, and core/metro router applications. It enables full hardware validation of ultra-low-jitter (51 fs RMS typ), multi-PLL clock synthesis with 18 programmable outputs, fractional/integer frequency generation up to 1.2288 GHz, and AccuTime™ software integration.

For engineers reviewing the SI540X-A-EVB datasheet, SI540X-A-EVB pinout, SI540X-A-EVB application, or SI540X-A-EVB equivalent, this board provides verified reference design support for ITU-T G.8273.2/G.8273.4-compliant timing systems, hitless switching validation, and real-time phase/frequency adjustment testing under 1PPS/PP2S and SyncE input conditions.

Technical Context

The SI540X-A-EVB implements a complete hardware platform for evaluating the Si5403/02/01 clock ICs, featuring four independent DSPLLs (including dedicated PPSPLL), two MultiSyth™ fractional dividers, and configurable I²C/SPI interface routing. It supports all output formats-LVDS, LVPECL, LVCMOS, HCSL, CML-and includes on-board TCXO, crystal, and 1PPS/PP2S input conditioning circuitry.

This board validates critical network timing behaviors: automatic Free-Run/Holdover/Locked mode transitions, sub-150 ps hitless switching between inputs, ±10 ns per-output delay adjustment, and real-time DCO tuning at 1 ppt resolution for IEEE 1588 servo loop implementation.

Key Specifications

Availability

SI540X-A-EVB is available at Aetrix Electronics and suitable for 5G O-RAN distributed unit (O-DU) development, IEEE 1588 boundary clock qualification, and SyncE-compliant metro router timing validation requiring stable component supply and rapid prototyping turnaround.

Supply support for SI540X-A-EVB 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

Skyworks Solutions, Inc. is a global leader in high-performance analog semiconductors, specializing in RF, timing, and connectivity solutions for wireless infrastructure, automotive, and industrial markets.

The SI540X-A-EVB belongs to Skyworks' NetSync™ evaluation platform series, designed specifically to accelerate deployment of ITU-T-compliant network timing systems in 5G, SyncE, and IEEE 1588 infrastructure equipment.

FAQ

What is the primary function of the SI540X-A-EVB?

The SI540X-A-EVB is an evaluation board for validating the Si5403/02/01 NetSync™ Network Synchronizer ICs in real-world 5G and SyncE timing applications. It provides full hardware access to all 18 outputs, dual MultiSyth™ dividers, and PPSPLL functionality - enabling engineers to test hitless switching, holdover stability, and IEEE 1588 phase-lock behavior before system integration. The SI540X-A-EVB supports both ClockBuilder Pro™ configuration and AccuTime™ software stack deployment.

Does the SI540X-A-EVB support IEEE 1588 grandmaster operation?

Yes, the SI540X-A-EVB fully supports IEEE 1588 grandmaster operation via its dedicated PPSPLL architecture, which locks to 1PPS/PP2S inputs while modulating DSPLL A for simultaneous frequency and phase alignment. It delivers 1 ppt DCO resolution and adaptive loop bandwidth (1 mHz–25 mHz), meeting ITU-T G.8273.2 T-GM requirements. The SI540X-A-EVB enables end-to-end validation of grandmaster timing accuracy without external components.

Which output signal formats are accessible on the SI540X-A-EVB?

The SI540X-A-EVB exposes all supported output formats from the Si540x IC: LVDS, S-LVDS, AC-coupled LVPECL, LVCMOS, slew-rate-limited (SRL) LVCMOS, HCSL, and CML. Each of the 18 outputs is individually configurable for voltage level (1.8 V/2.5 V/3.3 V), format, and ±10 ns delay - allowing direct interface verification with FPGA transceivers, ASIC SerDes, and PHY devices. The SI540X-A-EVB includes matched-length routing and termination for jitter-sensitive measurements.

Can the SI540X-A-EVB be used for SyncE wander filtering compliance testing?

Yes, the SI540X-A-EVB enables full SyncE wander filtering validation per ITU-T G.8262 and G.8262.1. Its DSPLL A and B architectures implement selectable jitter attenuation bandwidths (10 Hz–4 kHz) and automatic lock/hitless-switching logic required for EEC Option 1/2 and eEEC compliance. Engineers use the SI540X-A-EVB to generate pass/fail reports against wander masks using standard test equipment - confirming the SI540X-A-EVB's readiness for carrier-grade SyncE deployment.

Is ClockBuilder Pro™ software required to configure the SI540X-A-EVB?

No, ClockBuilder Pro™ is optional but strongly recommended for efficient configuration of the SI540X-A-EVB. The board supports both I²C and SPI (3- or 4-wire) interfaces, allowing custom host firmware to program registers directly. However, ClockBuilder Pro™ auto-generates register maps, validates timing constraints, and exports configuration files - significantly reducing setup time. All SI540X-A-EVB firmware updates and non-volatile memory writes are fully supported through ClockBuilder Pro™.