Skyworks Solutions Inc. SI5332B-D-GM2R

Overview

SI5332B-D-GM2R from Skyworks Solutions is an 8-output, externally crystal-referenced programmable clock generator using MultiSynth™ fractional synthesis. It delivers up to 200 MHz differential outputs with 190 fs RMS phase jitter, supports LVDS/LVPECL/HCSL/LVCMOS per-output configuration, and operates across –40 to +85 °C for Ethernet switch timing and PCIe Gen5-compliant server clock trees.

For engineers reviewing the SI5332B-D-GM2R datasheet, SI5332B-D-GM2R pinout, SI5332B-D-GM2R application, or SI5332B-D-GM2R equivalent, key selection criteria include its 40-pin QFN package, dual MultiSynth paths, five independent integer dividers, I²C programmability, and factory preprogrammability via ClockBuilder Pro for drop-in clock tree consolidation.

Technical Context

The SI5332B-D-GM2R implements a wideband PLL locked to a 16–50 MHz external crystal (XA/XB), feeding two independent MultiSynth fractional synthesis paths and five integer dividers. Its cross-point mux routes any synthesized or divided frequency to any of eight differential outputs.

Each output bank (A/B) shares a VDDO supply, enabling mixed-voltage operation (1.8/2.5/3.3 V), while hardware input pins support configurable functions including OE, spread-spectrum enable, and input clock selection - all defined in ClockBuilder Pro prior to factory programming.

Key Specifications

Pinout & Package

SI5332B-D-GM2R uses a 40-pin, 6 × 6 mm QFN package (RoHS-6 compliant, exposed thermal pad). Pinout follows the Si5332-GM2 40-pin configuration with dedicated VDDO0–VDDO3 for Bank A outputs (OUT0–OUT3), shared VDDO4/VDDO5 for Bank B (OUT4–OUT7), seven universal hardware input pins (IN1–IN7), I²C interface (SCLK/SDATA), and crystal interface (XA/XB).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SI5332B-D-GM2R, Si5332D-D-GM2R trades fractional synthesis capability for lower cost and simpler configuration, while LMK04832RHAR adds JESD204B features and dual-loop robustness at the expense of pin compatibility, per-output signal format flexibility, and ease of ClockBuilder Pro integration.

Availability

SI5332B-D-GM2R is available at Aetrix Electronics and suitable for Ethernet switch timing, PCIe Gen5 server clocking, broadcast video synchronization, and industrial embedded computing requiring stable component supply across long production lifecycles.

Supply support for SI5332B-D-GM2R 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 fixed-frequency clock sources with a single, software-configurable, low-jitter clock generator - targeting high-density networking, compute, and video infrastructure applications.

FAQ

What is the maximum differential output frequency supported by the SI5332B-D-GM2R?

The SI5332B-D-GM2R supports differential output frequencies up to 200 MHz. This limit is specified for the Si5332B variant (as opposed to Si5332A/C/E/G/L which support up to 333.33 MHz) and applies to all supported formats - LVDS, LVPECL, HCSL, and LVCMOS - under standard operating conditions (–40 to +85 °C, VDD = 1.8/2.5/3.3 V). The 200 MHz ceiling ensures compliance with PCIe Gen5 reference clock requirements and maintains 190 fs RMS jitter performance.

Does the SI5332B-D-GM2R include an embedded crystal?

No, the SI5332B-D-GM2R does not include an embedded crystal. It belongs to the Si5332A/B/C/D series, which require an external 16–50 MHz fundamental-mode crystal connected to the XA/XB pins. Embedded crystal variants (e.g., Si5332E/F/G/H/L) use a factory-integrated 50 MHz MEMS resonator and carry different part number suffixes. Using an external crystal allows design flexibility in frequency selection and layout optimization for ultra-low jitter.

How many independent integer dividers does the SI5332B-D-GM2R provide?

The SI5332B-D-GM2R provides up to five independent integer dividers. Each divider accepts input from the PLL output or MultiSynth paths and delivers an even-integer division ratio from 1 to 63. These dividers operate independently per output path and feed into the cross-point mux, enabling precise frequency scaling - for example, generating both 100 MHz and 25 MHz clocks simultaneously from a common 100 MHz MultiSynth source without added jitter.

Can the SI5332B-D-GM2R generate different output signal formats on different pins?

Yes, the SI5332B-D-GM2R supports per-output signal format configuration. Each of its eight differential outputs (OUT0–OUT7) can be individually set to LVDS, LVPECL, HCSL, or LVCMOS using ClockBuilder Pro or I²C register writes. This eliminates external level translators and simplifies interface to heterogeneous systems - for instance, driving LVPECL inputs on a SerDes ASIC while supplying LVCMOS clocks to an ARM-based controller on the same board.

What package type and pin count does the SI5332B-D-GM2R use?

The SI5332B-D-GM2R uses a 40-pin, 6 × 6 mm QFN package with an exposed thermal pad (RoHS-6 compliant, designation "GM2"). This package supports up to eight differential outputs and corresponds to the Si5332-GM2 variant. Pin assignments follow Skyworks' documented 40-pin layout, including dedicated VDDO pins for Bank A (OUT0–OUT3), shared VDDO4/VDDO5 for Bank B (OUT4–OUT7), and seven universal hardware input pins configurable via ClockBuilder Pro.