Skyworks Solutions Inc. SI5338C-B05034-GM

Overview

SI5338C-B05034-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 across –40 to +85 °C. It replaces up to four crystal oscillators in FPGA clocking, PCIe interconnect, and broadcast video timing systems.

For engineers reviewing the SI5338C-B05034-GM datasheet, SI5338C-B05034-GM pinout, SI5338C-B05034-GM application, or SI5338C-B05034-GM equivalent, key selection criteria include its MultiSynth™-based any-frequency synthesis (0.16–710 MHz per output), independent output voltage support (1.5/1.8/2.5/3.3 V), spread-spectrum capability (0.5–5.0% down-spread), and 24-QFN package compatibility with PCIe jitter requirements.

Technical Context

The SI5338C-B05034-GM implements a two-stage PLL architecture: a high-stability reference stage (input range 5–710 MHz) followed by four independent MultiSynth™ fractional-N synthesis blocks, each driving one output pair (CLKxA/CLKxB). Its programmable loop bandwidth (1.6 MHz typical) and external feedback mode enable zero-delay operation and precise jitter filtering.

Each output driver supports LVPECL/LVDS/HCSL/CMOS/SSTL/HSTL formats with per-output supply voltage (VDDOx), independent phase adjustment (<20 ps steps), and glitchless frequency increment/decrement in 1 ppm steps - all configured via I²C/SMBus interface with OTP NVM storage for factory programming.

Key Specifications

Pinout & Package

SI5338C-B05034-GM is housed in a 24-lead, 4 × 4 mm QFN package with exposed thermal pad. Pin assignments are fixed per Skyworks Rev. 1.6 datasheet (page 37), supporting dual differential inputs (IN1/IN2, IN5/IN6), two single-ended inputs (IN3, IN4), four differential output pairs (CLK0A/B through CLK3A/B), six VDDOx supplies, core VDD, I²C interface (SCL/SDA), interrupt (INTR), and reserved ground (RSVD_GND).

Key Features

Applications

Equivalent & Alternatives

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

Compared with Si5332A-D05089-GM and ICS853S02AG-01T, the SI5338C-B05034-GM delivers optimal balance of programmability, jitter performance, and footprint for mid-tier FPGA, PCIe, and telecom timing - offering full I²C configurability in a compact 24-QFN without requiring external VCXOs or sacrificing PCIe Gen 4 compliance.

Availability

SI5338C-B05034-GM is available at Aetrix Electronics and suitable for PCIe interconnect, FPGA clocking, and broadcast video timing requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for SI5338C-B05034-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, with leadership in RF, timing, and power management ICs.

The Si5338 family is designed as a highly configurable, low-jitter clock generator platform for high-speed digital systems - targeting PCIe, Ethernet, broadcast, and telecom infrastructure where precise, flexible, and reliable clock synthesis is mission-critical.

FAQ

What is the primary function of the SI5338C-B05034-GM?

The SI5338C-B05034-GM is an I²C-programmable quad clock generator that synthesizes four independent, any-frequency output clocks (0.16–710 MHz) with 0.7 ps RMS typical phase jitter. It serves as a drop-in replacement for multiple crystal oscillators in PCIe, FPGA, and broadcast video systems while supporting PCIe Gen 4 common clock compliance and spread-spectrum clocking.

Does the SI5338C-B05034-GM support PCIe Gen 4 timing requirements?

Yes, the SI5338C-B05034-GM is validated for PCIe Gen 4 common clock mode with 0.15–0.45 ps RMS jitter (12 kHz–20 MHz) per PCIe Base Specification 4.0 rev 0.5. Testing uses 100 MHz HCSL outputs, 2–4 MHz PLL bandwidth, and 10 MHz CDR - matching Intel Clock Jitter Tool v1.6.4 methodology.

How many output formats does the SI5338C-B05034-GM support per channel?

The SI5338C-B05034-GM supports LVPECL, LVDS, HCSL, CMOS, SSTL, and HSTL output formats on each of its four output drivers. Format selection is per-output and configurable via I²C registers; voltage per driver (1.5/1.8/2.5/3.3 V) is independently set using dedicated VDDOx pins.

Can the SI5338C-B05034-GM operate without external configuration?

Yes - the SI5338C-B05034-GM includes factory-programmed OTP NVM. When powered, it boots into a preconfigured state with valid clocks within 2 ms (tRDY), eliminating mandatory I²C initialization for basic operation. Full reprogramming remains possible via I²C or ClockBuilder Pro software.

What package type and thermal characteristics apply to the SI5338C-B05034-GM?

The SI5338C-B05034-GM uses a 24-pin QFN package (4 × 4 mm, 0.5 mm pitch) with exposed thermal pad. Its thermal resistance is θJA = 37 °C/W (still air) and θJC = 10 °C/W, enabling reliable operation at full load across –40 to +85 °C ambient without forced airflow in standard PCB layouts.