Skyworks Solutions Inc. SI5334K-B04797-GMR

Overview

SI5334K-B04797-GMR from Skyworks Solutions is a pin-controlled, quad-output any-frequency clock generator with four independently configurable differential clock outputs, 0.7 ps RMS typical phase jitter, 0 ppm frequency accuracy, and support for LVPECL/LVDS/HCSL/CMOS/SSTL/HSTL output formats up to 710 MHz - deployed in Ethernet switch/router, PCIe 3.0, and FPGA clocking systems.

For engineers reviewing the SI5334K-B04797-GMR datasheet, SI5334K-B04797-GMR pinout, SI5334K-B04797-GMR application, or SI5334K-B04797-GMR equivalent, this page delivers verified technical context, factory-programmed configuration details, MultiSynth synthesis architecture, pin-controlled frequency/phase adjustment, and PCIe-compliant spread-spectrum capability - all specific to the B04797 variant.

Technical Context

The SI5334K-B04797-GMR implements a fractional-N PLL with integrated VCO and four independent MultiSynth output dividers, enabling non-integer frequency synthesis on each of its four differential outputs. Its input stage accepts 8–30 MHz crystals or 5–710 MHz differential/single-ended clocks, with programmable R-divider and NVM-based configuration.

This variant supports pin-controlled spread spectrum (SSC) compliant with PCI Express 2.0 on any or all outputs operating at 100 MHz, plus loss-of-lock (LOL) and loss-of-signal (LOS) alarms via dedicated LOSLOL pin. It operates across –40 to +85 °C with core supply options of 1.8/2.5/3.3 V and per-output buffer supplies from 1.4 to 3.63 V.

Key Specifications

Pinout & Package

SI5334K-B04797-GMR is housed in a 4 mm × 4 mm, 24-pin QFN package with exposed thermal pad (RoHS-compliant, lead-free, halogen-free). Pin assignments are fixed per Skyworks Si5334 standard pinout.

Key Features

Applications

Equivalent & Alternatives

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

Compared with Si5332A-D08189-GM and ICS8430I-01T, SI5334K-B04797-GMR uniquely balances factory-programmed simplicity, pin-controlled runtime adjustments, PCIe-compliant SSC, and full any-frequency synthesis - making it optimal for high-volume, unprogrammed, low-jitter clocking where deterministic boot behavior is critical.

Availability

SI5334K-B04797-GMR is available at Aetrix Electronics and suitable for Ethernet switch/router timing, PCIe 3.0 clock distribution, and FPGA clocking applications requiring stable component supply, guaranteed long-term availability, and full traceability.

Supply support for SI5334K-B04797-GMR 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 for wireless, broadband, automotive, and industrial markets.

The Si5334 product line delivers pin-configurable, low-jitter clock generators optimized for high-speed serial interface timing - designed specifically for PCIe, Ethernet, broadcast video, and FPGA-based systems demanding precise, flexible, and reliable clock synthesis.

FAQ

What is the primary function of the SI5334K-B04797-GMR?

The SI5334K-B04797-GMR is a factory-programmed, pin-controlled quad-output clock generator that synthesizes any frequency up to 710 MHz on each of its four differential outputs using Skyworks' MultiSynth technology. It delivers 0 ppm frequency accuracy and 0.7 ps RMS phase jitter, making SI5334K-B04797-GMR ideal for PCIe, Ethernet, and FPGA timing applications where deterministic boot and low jitter are essential.

Does the SI5334K-B04797-GMR support spread spectrum clocking?

Yes - the SI5334K-B04797-GMR supports PCIe 2.0-compliant spread spectrum clocking (SSC) on any output running at exactly 100 MHz. It provides ±0.5% frequency deviation at a 30–33 kHz modulation rate, reducing electromagnetic interference without compromising timing integrity. This feature is enabled by default in the B04797 configuration and requires no external control signals beyond power and reference input.

What input references does the SI5334K-B04797-GMR accept?

The SI5334K-B04797-GMR accepts multiple reference sources: an 8–30 MHz fundamental-mode crystal connected to IN1/IN2, or AC-coupled differential clocks (5–710 MHz) on IN1/IN2 or IN5/IN6, or DC-coupled single-ended clocks (5–200 MHz CMOS, 5–350 MHz SSTL/HSTL) on IN3/IN4. All inputs are validated across –40 to +85 °C, and SI5334K-B04797-GMR automatically detects and locks to the active reference on power-up.

How is the SI5334K-B04797-GMR configured - via pins or I²C?

The SI5334K-B04797-GMR is factory-programmed with one-time programmable (OTP) memory and uses only pin-strapping for runtime control - no I²C interface or external configuration is required. Configuration parameters (frequencies, formats, VDDO levels, phase offsets) are stored in on-chip NVM and loaded automatically at power-up. Pin-controlled features like frequency increment/decrement (on CLK0A/B) and output enable (OEB) operate without firmware intervention, ensuring SI5334K-B04797-GMR delivers deterministic, zero-latency operation.

What is the thermal performance of the SI5334K-B04797-GMR?

The SI5334K-B04797-GMR has a junction-to-ambient thermal resistance (θJA) of 37 °C/W under still-air conditions and junction-to-case (θJC) of 25 °C/W. With typical core supply current of 45 mA at 100 MHz outputs and 25 MHz reference, power dissipation remains below 150 mW - enabling reliable operation in compact, thermally constrained PCB layouts. The exposed thermal pad must be soldered to a solid ground plane for optimal heat transfer and signal integrity.