Skyworks Solutions Inc. SI5338P-B05175-GM

Overview

SI5338P-B05175-GM from Skyworks Solutions is a quad-output, I²C-programmable clock generator implementing MultiSynth™ frequency synthesis with 0 ppm precision per output. It delivers four independent differential or single-ended clocks (LVPECL/LVDS/HCSL/CMOS/SSTL/HSTL) across 0.16–710 MHz, supports PCIe Gen 1–4 common clock and SRNS compliance, and operates from 1.8/2.5/3.3 V core supply in a 4 × 4 mm 24-QFN package for FPGA, processor, and Ethernet switch timing.

For engineers reviewing the SI5338P-B05175-GM datasheet, SI5338P-B05175-GM pinout, SI5338P-B05175-GM application, or SI5338P-B05175-GM equivalent, key selection criteria include its 0.7 ps RMS jitter (GbE), independent per-output voltage (1.5–3.3 V), phase/frequency increment/decrement capability (±45 ns / 1 ppm steps), spread-spectrum support (0.5–5.0% at 33–63 kHz), and external feedback mode for zero-delay operation.

Technical Context

The SI5338P-B05175-GM integrates a two-stage PLL architecture: a high-performance Phase-Frequency Detector (PFD) and loop filter driving a VCO, followed by four independent MultiSynth™ fractional-N synthesis blocks - each feeding a configurable output driver stage. This enables true any-frequency generation without external components.

Each of the four outputs supports independent format selection (LVPECL, LVDS, HCSL, CMOS, SSTL, HSTL), independent supply voltage (VDDO0–VDDO3), programmable initial phase offset (±45 ns), and glitchless frequency adjustment via dedicated PINC/FDEC pins or I²C. Input flexibility includes crystal (8–30 MHz), CMOS (5–200 MHz), SSTL/HSTL (5–350 MHz), or differential (5–710 MHz) references.

Key Specifications

Pinout & Package

SI5338P-B05175-GM uses a 24-lead QFN package (4 mm × 4 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are validated per Skyworks Si5338 Rev. 1.6 datasheet, page 33 (Pin Descriptions) and page 37 (Device Pinout by Part Number).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SI5338P-B05175-GM, the Si5332A offers superior jitter and scalability but increases BOM complexity and cost, while the ICS853S01AGI-01LFT provides lower unit cost and simpler design at the expense of configurability and jitter performance.

Availability

SI5338P-B05175-GM is available at Aetrix Electronics and suitable for PCIe Gen 4 switch timing, Ethernet switching/routing, and FPGA processor clocking requiring stable component supply, long-term lifecycle assurance, and traceable sourcing for production programs.

Supply support for SI5338P-B05175-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 leader in analog and mixed-signal semiconductors, specializing in RF, timing, and connectivity solutions for infrastructure, automotive, and mobile markets.

The Si5338 family was designed as a programmable, low-jitter clock generator platform targeting high-speed digital systems - including PCIe, Ethernet, broadcast video, and FPGA-based platforms - where flexibility, precision, and integration replace legacy oscillator + buffer combinations.

FAQ

What is the maximum output frequency supported by SI5338P-B05175-GM?

The SI5338P-B05175-GM supports up to 710 MHz on LVPECL/LVDS/CML outputs, 350 MHz on SSTL/HSTL, 250 MHz on HCSL, and 200 MHz on CMOS. However, only two unique frequencies above 350 MHz (Fvco/4 and Fvco/6) may be generated simultaneously per the device's synthesis architecture.

Does SI5338P-B05175-GM support PCIe Gen 4 Common Clock compliance?

Yes, SI5338P-B05175-GM meets PCIe Gen 4 Common Clock jitter requirements (≤0.45 ps RMS, 10 kHz–50 MHz) when configured with appropriate PLL bandwidth (2–4 MHz or 2–5 MHz) and CDR frequency (10 MHz), as verified per Skyworks AN562 and PCIe Base Specification 4.0 rev. 0.5.

Can SI5338P-B05175-GM generate different output formats simultaneously?

Yes, SI5338P-B05175-GM supports mixed output formats - e.g., LVDS on CLK0, HCSL on CLK1, CMOS on CLK2, and SSTL on CLK3 - with independent voltage supplies (VDDO0–VDDO3) and format registers, enabling direct interfacing with heterogeneous logic families on the same board.

What is the minimum input reference frequency for SI5338P-B05175-GM?

The SI5338P-B05175-GM accepts input references from 5 MHz (CMOS, SSTL, HSTL, differential) and 8 MHz (crystal). In PLL bypass (buffer) mode, operation down to 1 MHz is supported, though loss-of-signal detection is disabled below 5 MHz.

How is configuration stored and retained on SI5338P-B05175-GM?

SI5338P-B05175-GM contains one-time-programmable (OTP) non-volatile memory that stores user-defined configurations. Once programmed via I²C, the device boots automatically with the saved settings - eliminating the need for external EEPROM or host initialization firmware during power-up.