Skyworks Solutions Inc. SI5332F-D-GM2

Overview

SI5332F-D-GM2 from Skyworks is an 8-output, embedded-crystal clock generator using MultiSynth™ fractional synthesis to deliver up to 200 MHz differential outputs with 175 fs RMS phase jitter. It features six independent VDDO supply pins, user-configurable LVDS/LVPECL/HCSL/LVCMOS output formats per channel, and operates across –40 to +85 °C for Ethernet switch timing and PCIe Gen5/6 reference clocking.

For engineers reviewing the SI5332F-D-GM2 datasheet, SI5332F-D-GM2 pinout, SI5332F-D-GM2 application, or SI5332F-D-GM2 equivalent, key selection considerations include its factory-programmed 50 MHz embedded crystal, 40-pin LGA package, I²C-based reconfiguration capability, and support for mixed-supply banked outputs in high-density server and telecom timing systems.

Technical Context

The SI5332F-D-GM2 implements a wideband PLL locked to its internal 50 MHz crystal, feeding two independent MultiSynth fractional synthesis paths and five integer dividers. Its cross-point mux routes synthesized frequencies to eight differential outputs grouped into four banks (two dedicated-VDDO + two shared-VDDO banks), enabling flexible frequency tree generation without external components.

Each output supports independent signal format selection (LVDS, LVPECL, HCSL, or LVCMOS), programmable spread spectrum (0.1–2.5% down/center), and glitchless on-the-fly frequency changes via multi-profile NVM storage. Input selection is configurable via hardware pins or I²C register writes, with no requirement for external loop filter components.

Key Specifications

Pinout & Package

SI5332F-D-GM2 uses a 6×6 mm, 40-pin LGA package (RoHS-6 compliant) with exposed thermal pad. Pin functions are defined per Skyworks' official 40-pin LGA pinout for Si5332E/F/G/H/L variants, supporting embedded crystal operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SI5332F-D-GM2, Si5332D-D-GM2 trades lower jitter performance and added crystal design effort for broader frequency flexibility (up to 333.33 MHz), while LMK5B33414RGZT offers smaller size and TI-specific toolchain support at the cost of output count and PCIe Gen6 readiness.

Availability

SI5332F-D-GM2 is available at Aetrix Electronics and suitable for server clock trees, Ethernet switch timing, and small cell baseband applications requiring stable component supply, long-term lifecycle assurance, and factory-programmed precision.

Supply support for SI5332F-D-GM2 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 communications, automotive, and industrial markets.

The Si5332 family was designed to replace multiple discrete clock ICs and oscillators in high-performance computing and networking systems, emphasizing ultra-low jitter, software-defined configurability, and embedded reference integration.

FAQ

What is the maximum output frequency supported by the SI5332F-D-GM2?

The SI5332F-D-GM2 supports up to 200 MHz on all eight differential outputs in integer synthesis mode. This limit is specified for the SI5332F grade per Skyworks' Ordering Guide and reflects validated performance with the embedded 50 MHz crystal reference. Frequencies above 200 MHz require the SI5332A/C/G variants with external crystal or higher-grade synthesis paths.

Does the SI5332F-D-GM2 require an external crystal?

No, the SI5332F-D-GM2 includes an embedded 50 MHz crystal and does not require an external crystal. The XTAL_IN and XTAL_OUT pins are no-connect in this variant. This eliminates crystal-related layout constraints, load capacitance tuning, and startup calibration steps, simplifying design-in for high-reliability applications.

How many independent power supply rails does the SI5332F-D-GM2 support for its outputs?

The SI5332F-D-GM2 provides six independent VDDO supply pins (VDDO0 through VDDO5), enabling mixed-voltage clock distribution. Each rail powers a subset of outputs, allowing simultaneous 1.8 V, 2.5 V, and 3.3 V signaling on different banks - critical for interfacing with heterogeneous SoCs, FPGAs, and PHYs in modern compute platforms.

Can the SI5332F-D-GM2 generate PCIe Gen6-compliant clocks?

Yes, the SI5332F-D-GM2 meets PCIe Gen1 through Gen6 specifications including SRIS compliance, with measured 175 fs RMS phase jitter (12 kHz–20 MHz) using its embedded crystal. Its output frequency range (5–200 MHz) covers all required PCIe reference clocks (100 MHz, 125 MHz, 156.25 MHz), and its programmable spread spectrum supports EMI reduction without violating PCIe jitter masks.

What interface does the SI5332F-D-GM2 use for configuration and programming?

The SI5332F-D-GM2 uses a standard two-wire I²C interface (SCLK and SDATA pins) for configuration, register access, and multi-profile switching. ClockBuilder Pro software generates custom part numbers and configuration files, which can be loaded into the device's NVM during manufacturing or updated in-system via I²C without requiring additional debug hardware or protocols.