Skyworks Solutions Inc. SI5334K-B04854-GM

Overview

SI5334K-B04854-GM from Skyworks Solutions is a pin-controlled, any-frequency quad clock generator with four independently configurable differential outputs, supporting frequencies up to 710 MHz (select outputs), 0.7 ps RMS typical phase jitter, and zero ppm frequency error via MultiSynth synthesis. It operates from 1.8/2.5/3.3 V core supply and targets PCIe 2.0/3.0 timing, FPGA clocking, and broadcast video systems.

For engineers reviewing the SI5334K-B04854-GM datasheet, SI5334K-B04854-GM pinout, SI5334K-B04854-GM application, or SI5334K-B04854-GM equivalent, key selection considerations include its 4× differential output flexibility, factory-programmed configuration, spread-spectrum support on 100 MHz outputs, and 24-QFN package compatibility with high-density PCB layouts.

Technical Context

The SI5334K-B04854-GM integrates a fractional-N PLL with an on-chip VCO and four independent MultiSynth output dividers, enabling non-integer frequency synthesis per output. Its input stage accepts crystal (8–30 MHz) or differential/single-ended clocks (5–710 MHz), while synthesis stage 2 delivers precise output frequencies with <20 ps phase step resolution.

Each output driver supports LVPECL/LVDS/HCSL/CMOS/SSTL/HSTL formats with independent VDDO supplies (1.5/1.8/2.5/3.3 V), and the device implements loss-of-lock (LOL) and loss-of-signal (LOS) monitoring via dedicated pins. Spread spectrum is PCI Express 2.0 compliant and enabled only on 100 MHz outputs with Rn divider = 1.

Key Specifications

Pinout & Package

SI5334K-B04854-GM is housed in a 24-lead, 4 mm × 4 mm QFN package with exposed thermal pad. Pin assignments are fixed per Skyworks Si5334 family layout and validated for signal integrity in high-speed clock distribution.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad clock generator applications.

Compared with SI5334K-B04854-GM, Si5332A-D06889-GM offers superior jitter and integration but adds complexity and cost, while ICS8430I-01LGIT trades flexibility for simplicity and lower unit price - making SI5334K-B04854-GM the optimal balance of programmability, jitter performance, and pin-control ease for mid-volume industrial designs.

Availability

SI5334K-B04854-GM is available at Aetrix Electronics and suitable for PCIe 3.0 timing, FPGA clocking, and broadcast video applications requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for SI5334K-B04854-GM 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 is a global semiconductor company specializing in analog and mixed-signal connectivity solutions, with leadership in RF, timing, and precision analog technologies.

The Si5334 product line delivers pin-configurable, low-jitter clock generators for high-speed serial interfaces and data-intensive systems - designed specifically for PCIe, Ethernet, broadcast, and telecom infrastructure where deterministic timing and EMI control are critical.

FAQ

What is the primary function of the SI5334K-B04854-GM in a timing architecture?

The SI5334K-B04854-GM serves as a pin-controlled, any-frequency quad clock generator that synthesizes four independent, low-jitter differential clock outputs from a single crystal or reference input. Its MultiSynth technology ensures zero ppm frequency error and 0.7 ps RMS typical phase jitter, making SI5334K-B04854-GM ideal for PCIe, Ethernet, and broadcast timing systems where precision and flexibility are essential.

Does the SI5334K-B04854-GM support spread spectrum clocking, and under what conditions?

Yes, the SI5334K-B04854-GM supports PCI Express 2.0-compliant spread spectrum on any output clock operating at exactly 100 MHz, provided the Rn divider is set to 1. This feature is enabled via factory programming and does not require runtime control - SI5334K-B04854-GM delivers –0.5% frequency deviation at 30–33 kHz modulation rate to reduce EMI without impacting system timing margins.

How many independent output voltage supplies does the SI5334K-B04854-GM support, and why is this important?

The SI5334K-B04854-GM supports four independent output buffer supply pins (VDDO0–VDDO3), each configurable for 1.5 V, 1.8 V, 2.5 V, or 3.3 V. This enables simultaneous LVDS, HCSL, and SSTL outputs driving heterogeneous FPGA or ASIC I/O banks - eliminating level-shifter components and simplifying power delivery. SI5334K-B04854-GM's per-output rail control directly supports mixed-voltage system architectures.

Can the SI5334K-B04854-GM generate frequencies above 350 MHz, and if so, which outputs support them?

Yes, the SI5334K-B04854-GM can generate frequencies up to 710 MHz on LVPECL and LVDS outputs, but only for select frequencies (not arbitrary synthesis). Frequencies above 350 MHz require operation in specific MultiSynth modes and are limited to two unique outputs simultaneously (e.g., Fvco/4 and Fvco/6). SI5334K-B04854-GM documentation confirms 367–473.33 MHz and 550–710 MHz ranges apply exclusively to LVPECL/LVDS outputs under defined VCO constraints.

What is the role of the LOSLOL pin on the SI5334K-B04854-GM, and how fast does it respond to input failure?

The LOSLOL pin is an open-drain, active-low alarm indicating loss of input signal (LOS) or PLL lock (LOL). It asserts within 2.6–5 µs of reference clock failure and deasserts within 0.01–1 µs after recovery. This real-time monitoring capability allows system controllers to initiate failover or safe shutdown - SI5334K-B04854-GM's fast LOSLOL response is critical for telecom line cards and industrial PLCs requiring high availability.