Skyworks Solutions Inc. SI5338P-B05175-GMR

Overview

SI5338P-B05175-GMR from Skyworks Solutions is an I²C-programmable quad clock generator IC 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 across –40 to +85 °C in a 4 × 4 mm 24-QFN package. It replaces up to four crystal oscillators in high-speed serial interface timing applications.

For engineers reviewing the SI5338P-B05175-GMR datasheet, SI5338P-B05175-GMR pinout, SI5338P-B05175-GMR application, or SI5338P-B05175-GMR equivalent, key selection considerations include its MultiSynth™ fractional-N synthesis architecture, independent output voltage per driver (1.5/1.8/2.5/3.3 V), spread-spectrum capability (0.5–5.0% down-spread), glitchless frequency increment/decrement (1 ppm steps), and programmable phase offset (±45 ns).

Technical Context

The SI5338P-B05175-GMR implements a two-stage PLL architecture: a high-stability integer-N Phase-Locked Loop (PLL) for reference conditioning followed by four independent MultiSynth™ fractional-N synthesis blocks-one per output-enabling true zero-ppm frequency accuracy on all four outputs simultaneously. Each MultiSynth supports integer or fractional mode operation with synthesis resolution down to 1 ppb.

Input flexibility includes external crystal (8–30 MHz), CMOS (5–200 MHz), SSTL/HSTL (5–350 MHz), or differential (5–710 MHz) references. Output drivers support LVPECL/LVDS/HCSL/CMOS/SSTL/HSTL formats with independent supply voltages (VDDO0–VDDO3) and configurable slew rates, enabling direct interfacing with FPGAs, processors, and SerDes PHYs without level-shifting components.

Key Specifications

Pinout & Package

SI5338P-B05175-GMR is housed in a 24-lead, 4 × 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-D05175-GM and ICS853S01AGI-01LFT, SI5338P-B05175-GMR delivers optimal balance of programmability, jitter performance, and compact 4 × 4 mm footprint - making it ideal for space-constrained, multi-standard timing applications such as PCIe Gen 4 switches and 10G Ethernet line cards where field reconfiguration and EMI control are required.

Availability

SI5338P-B05175-GMR is available at Aetrix Electronics and suitable for PCIe Gen 4 switch timing, 10GbE switch/router clocking, and broadcast video synchronization requiring stable component supply, long-term lifecycle support, and traceable sourcing.

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

The Si5338 product line was designed for high-performance, software-configurable clock generation in multi-standard serial interface systems-including PCIe, Ethernet, Fibre Channel, and broadcast video-where low jitter, flexible output formatting, and field programmability are critical.

FAQ

What is the core supply current consumption of the SI5338P-B05175-GMR under full load?

The SI5338P-B05175-GMR draws 45 mA typical core supply current (IDD) when operating at 100 MHz on all four outputs with a 25 MHz reference clock. In buffer mode (PLL bypass), core current drops to 12 mA typical (IDDB) with a 50 MHz reference. These values are measured at nominal supply voltage and 25 °C ambient per Table 3 of the datasheet.

Does the SI5338P-B05175-GMR support PCIe Gen 4 Separate Reference No Spread (SRNS) timing?

Yes, the SI5338P-B05175-GMR supports PCIe Gen 4 SRNS mode with 0.11–0.32 ps RMS jitter (typical), validated using a PLL bandwidth of 2–4 MHz and CDR = 10 MHz. This capability is explicitly confirmed in Table 12 of the datasheet and aligns with PCI Express Base Specification 4.0 rev. 0.5 requirements.

Can the SI5338P-B05175-GMR generate four different frequencies simultaneously?

Yes, the SI5338P-B05175-GMR uses four independent MultiSynth™ blocks to synthesize four distinct output frequencies simultaneously - ranging from 0.16 MHz to 710 MHz - with true zero-ppm accuracy. Each output supports independent format (LVPECL/LVDS/HCSL/CMOS), voltage (1.5/1.8/2.5/3.3 V), and phase offset settings.

What input reference options does the SI5338P-B05175-GMR support?

The SI5338P-B05175-GMR supports five input reference types: external crystal (8–30 MHz), CMOS (5–200 MHz), SSTL (5–350 MHz), HSTL (5–350 MHz), and differential (5–710 MHz). Input pins IN1/IN2 and IN5/IN6 accept differential signals; IN3/IN4 accept single-ended inputs with programmable termination.

Is ClockBuilder Pro software required to configure the SI5338P-B05175-GMR?

No, ClockBuilder Pro is optional but strongly recommended for initial configuration and validation of the SI5338P-B05175-GMR. The device supports full I²C/SMBus programming in-system, allowing runtime reconfiguration. However, ClockBuilder Pro provides GUI-based register setup, jitter simulation, and PCIe compliance checking - significantly reducing development time for complex timing trees.