Skyworks Solutions Inc. SI5334C-B05738-GM

Overview

SI5334C-B05738-GM from Skyworks Solutions is a pin-controlled, any-frequency quad clock generator IC with four independently configurable differential outputs. It synthesizes frequencies from 0.16 MHz to 710 MHz per output using MultiSynth fractional-N synthesis, delivers 0.7 ps RMS typical phase jitter, supports LVPECL/LVDS/HCSL/CMOS/SSTL/HSTL formats, and operates from 1.8/2.5/3.3 V core and output supplies - enabling precise clocking in PCIe 3.0, 10GbE, and FPGA timing systems.

For engineers reviewing the SI5334C-B05738-GM datasheet, SI5334C-B05738-GM pinout, SI5334C-B05738-GM application, or SI5334C-B05738-GM equivalent, this device offers factory-programmed, zero-ppm-accuracy clock synthesis with independent output voltage control, glitchless frequency stepping (1 ppm), sub-20 ps phase adjustment, and loss-of-lock/signal monitoring - critical for high-reliability telecom and datacenter timing designs.

Technical Context

The SI5334C-B05738-GM integrates a fully on-chip fractional-N PLL with VCO, loop filter, and four independent MultiSynth dividers, each supporting integer or fractional synthesis up to Fvco/8 (350 MHz) or select higher frequencies (up to 710 MHz). Input flexibility includes 8–30 MHz crystal, 5–200 MHz CMOS, 5–350 MHz SSTL/HSTL, or 5–710 MHz differential reference clocks.

Each of the four differential output drivers features independent supply voltage selection (1.5/1.8/2.5/3.3 V), format configurability (LVPECL, LVDS, HCSL, CMOS, SSTL, HSTL), and programmable initial phase offset (±45 ns) with 20 ps resolution. The device operates across –40 to +85 °C and supports optional zero-delay mode via external feedback.

Key Specifications

Pinout & Package

SI5334C-B05738-GM is housed in a 24-lead, 4 mm × 4 mm QFN package with exposed thermal pad. Pin assignments follow Skyworks' standard Si5334 pinout, including dual differential inputs (IN1/IN2, IN5/IN6), single-ended inputs (IN3, IN4), four differential output pairs (CLK0A/B–CLK3A/B), dedicated LOSLOL alarm output, OEB enable, and separate VDD (core) and VDDOx (output buffer) supplies.

Key Features

Applications

Equivalent & Alternatives

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

Compared with Si5332A-D05738-GM, SI5334C-B05738-GM offers simpler pin-control programming and lower cost for crystal-based designs; versus ICS8430I-01T, it provides full frequency agility and superior jitter performance but requires factory configuration - making it optimal for PCIe, 10GbE, and FPGA timing where flexibility and precision are mandatory.

Availability

SI5334C-B05738-GM is available at Aetrix Electronics and suitable for PCIe 3.0 timing, 10GbE switch clocking, and FPGA/ASIC clock distribution requiring stable component supply, long-term lifecycle assurance, and guaranteed factory-programmed configurations.

Supply support for SI5334C-B05738-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 Si5334 product line delivers high-performance, any-frequency clock generation for demanding datacenter, telecom, and broadcast applications - designed to replace multiple discrete oscillators and simplify timing architecture with ultra-low jitter and flexible output formatting.

FAQ

What is the maximum output frequency supported by SI5334C-B05738-GM?

SI5334C-B05738-GM supports up to 710 MHz on LVPECL and LVDS outputs under specific conditions (e.g., Fvco/4 or Fvco/6 modes), while maintaining full specification compliance at 0.16–350 MHz across all supported formats. Frequencies above 350 MHz require validation per Skyworks AN562 and are limited to two unique outputs simultaneously.

Does SI5334C-B05738-GM require an external configuration interface like I²C?

No. SI5334C-B05738-GM is factory-programmed with OTP NVM and operates autonomously after power-up. All configuration - including output frequencies, formats, voltages, and phase offsets - is stored in on-chip memory and requires no runtime I²C or SPI communication, simplifying system design and reducing firmware dependencies.

Can SI5334C-B05738-GM generate different output formats simultaneously?

Yes. SI5334C-B05738-GM supports concurrent LVPECL, LVDS, HCSL, CMOS, SSTL, and HSTL outputs - one format per output pair (CLK0A/B through CLK3A/B). Each output bank has its own VDDO supply, allowing mixed-voltage and mixed-format clock distribution from a single IC.

What is the purpose of the LOSLOL pin on SI5334C-B05738-GM?

The LOSLOL pin on SI5334C-B05738-GM is an open-drain, active-low alarm output that asserts within 5 µs of either loss-of-signal (on any enabled input) or loss-of-lock (PLL unlock). It enables real-time system monitoring and fail-safe response in telecom and enterprise infrastructure without requiring external supervision circuitry.

How does SI5334C-B05738-GM achieve 0 ppm frequency accuracy?

SI5334C-B05738-GM achieves true 0 ppm frequency accuracy using Skyworks' patented MultiSynth fractional-N synthesis architecture. Unlike traditional PLLs with integer dividers, MultiSynth employs high-resolution fractional division to synthesize exact output frequencies from the reference without accumulated rounding error - verified across all outputs in the factory-programmed configuration.