Skyworks Solutions Inc. SI5338Q-B04386-GM

Overview

SI5338Q-B04386-GM from Skyworks Solutions is an I²C-programmable quad clock generator with four independently configurable differential or single-ended outputs, 0.7 ps RMS typical phase jitter, PCIe Gen 1–4 Common Clock and Gen 3 SRNS compliance, and operation from 1.8/2.5/3.3 V core supply. It replaces up to four crystal oscillators in FPGA clocking, PCIe interconnect, and broadcast video timing systems.

For engineers reviewing the SI5338Q-B04386-GM datasheet, SI5338Q-B04386-GM pinout, SI5338Q-B04386-GM application, or SI5338Q-B04386-GM equivalent, key selection criteria include output format flexibility (LVPECL/LVDS/HCSL/CMOS/SSTL/HSTL), independent per-output voltage control (1.5–3.3 V), any-frequency synthesis resolution (1 ppb), spread-spectrum capability (0.5–5.0% at 33–63 kHz), and loss-of-lock/loss-of-signal alarm support.

Technical Context

The SI5338Q-B04386-GM implements a two-stage PLL architecture: a high-stability reference stage (with crystal or external clock input) followed by four independent MultiSynth™ fractional-N synthesis engines. Each engine drives one of four output drivers with programmable divider chains (R/M/N/P), enabling zero-ppm accuracy across all outputs.

It supports flexible reference inputs - 8–30 MHz crystal, 5–200 MHz CMOS, 5–350 MHz SSTL/HSTL, or 5–710 MHz differential - and offers independent frequency increment/decrement (1 ppm steps), phase adjustment (<20 ps steps), and spread-spectrum modulation on any output. External feedback mode enables zero-delay operation.

Key Specifications

Pinout & Package

SI5338Q-B04386-GM is housed in a 24-lead, 4 mm × 4 mm QFN package with exposed thermal pad. Pin assignments are fixed per the Si5338 family and validated for this variant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with Si5332A-D06989-GM, SI5338Q-B04386-GM offers broader input reference support and simpler configuration for mid-complexity systems; compared with ICS8430I-01LG, it provides field-programmability and voltage flexibility at higher design effort but greater long-term BOM adaptability.

Availability

SI5338Q-B04386-GM is available at Aetrix Electronics and suitable for PCIe interconnect, Ethernet switching, broadcast video synchronization, and FPGA clocking applications requiring stable component supply, long-term lifecycle assurance, and full traceability.

Supply support for SI5338Q-B04386-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 for communications, automotive, and industrial markets.

The Si5338 product line delivers highly configurable, low-jitter clock generation for systems demanding precise frequency synthesis, multi-format output flexibility, and robust jitter performance across PCIe, Ethernet, and video applications.

FAQ

What is the maximum output frequency supported by SI5338Q-B04386-GM in LVPECL mode?

The SI5338Q-B04386-GM supports up to 710 MHz in LVPECL mode when operating with appropriate load termination and supply voltage. This capability is confirmed in Table 6 of the official Skyworks datasheet Rev. 1.6, which specifies LVPECL output frequency range as 0.16–710 MHz under valid operating conditions. The device achieves this using its MultiSynth™ fractional-N synthesis engine with optimized VCO calibration.

Does SI5338Q-B04386-GM support PCIe Gen 4 Common Clock compliance?

Yes, SI5338Q-B04386-GM meets PCIe Gen 4 Common Clock jitter requirements with ≤0.45 ps RMS (12 kHz–20 MHz) as verified in Table 12 of the Skyworks datasheet Rev. 1.6. It achieves this using a 2–5 MHz PLL loop bandwidth and is validated with the Skyworks PCIe Clock Jitter Tool. The part is explicitly listed in the "Features" section as PCIe Gen 1/2/3/4 Common Clock compliant.

Can SI5338Q-B04386-GM generate four different output frequencies simultaneously?

Yes, SI5338Q-B04386-GM can synthesize four independent frequencies simultaneously - one per output driver - using its four dedicated MultiSynth™ engines. Each output supports any frequency within its format-specific range (e.g., 0.16–710 MHz for LVPECL), with 1 ppb resolution and zero ppm error. This capability is central to the device's "any-frequency, any-output" architecture described in the official Skyworks product description.

What reference inputs does SI5338Q-B04386-GM accept?

SI5338Q-B04386-GM accepts multiple reference types: external 8–30 MHz crystal (differential), 5–200 MHz CMOS (single-ended on IN3/IN4), 5–350 MHz SSTL/HSTL (single-ended), or 5–710 MHz differential (on IN1/IN2/IN5/IN6). All are supported concurrently in hardware; selection is configured via register settings. This flexibility is documented in the "Flexible input reference" feature list and Table 6 of the datasheet.

Is SI5338Q-B04386-GM pin-compatible with other Si5338 variants?

Yes, SI5338Q-B04386-GM shares the same 24-pin QFN package and pinout as all Si5338 family members, including Si5338A/B/C/D/E/F/G/H/I/J/K/L/M/N/O/P/Q/R/S/T/U/V/W/X/Y/Z variants. Pin assignments (e.g., CLK0A/CLK0B on pins 17/18) and electrical characteristics are identical across the family, enabling hardware reuse across configurations. This is confirmed in Section 8 ("Device Pinout by Part Number") of the Skyworks datasheet Rev. 1.6.