Skyworks Solutions Inc. SI5334C-B04104-GM

Overview

SI5334C-B04104-GM from Skyworks Solutions is a pin-controlled, any-frequency quad clock generator IC with four independently configurable differential outputs, 0.7 ps RMS typical phase jitter, 350 MHz maximum integer-output frequency (up to 710 MHz at select frequencies), and support for LVPECL/LVDS/HCSL/CMOS/SSTL/HSTL output formats in telecom and high-speed serial interface applications.

For engineers reviewing the SI5334C-B04104-GM datasheet, SI5334C-B04104-GM pinout, SI5334C-B04104-GM application, or SI5334C-B04104-GM equivalent, key selection considerations include its MultiSynth-based fractional-N PLL architecture, independent per-output voltage supply (1.5–3.3 V), 1.8/2.5/3.3 V core supply compatibility, 4×4 mm 24-QFN package, and factory-programmed configuration enabling zero-user-intervention startup.

Technical Context

The SI5334C-B04104-GM implements a two-stage synthesis architecture: a primary fractional-N PLL (phase detector, charge pump, loop filter, VCO, R/N dividers) followed by four independent MultiSynth output dividers (M0–M3), each capable of integer or fractional division to generate any output frequency with zero ppm error. Input flexibility includes crystal (8–30 MHz) or AC/DC-coupled clock inputs (5–710 MHz).

Each output driver supports format selection (LVPECL/LVDS/HCSL/CMOS/SSTL/HSTL), independent VDDO supply (1.5/1.8/2.5/3.3 V), and features pin-controlled phase adjustment (±45 ns range, 20 ps step) and optional spread spectrum (PCIe-compliant, 100 MHz outputs only). Loss-of-signal and loss-of-lock detection are provided via the LOSLOL pin.

Key Specifications

Pinout & Package

SI5334C-B04104-GM is housed in a 4×4 mm, 24-lead QFN package with exposed thermal pad (RoHS-compliant, lead-free). Pin assignments follow Skyworks' standard Si5334 top-view layout: pins include four differential input pairs (IN1/IN2, IN3/IN4, IN5/IN6, IN7), four differential output pairs (CLK0A/CLK0B through CLK3A/CLK3B), three VDDO supplies (VDDO0–VDDO3), core VDD, GND, OEB (output enable), LOSLOL (loss-of-signal/loss-of-lock alarm), and RSVD_GND.

Key Features

Applications

Equivalent & Alternatives

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

Compared with Si5332A-D06104-GM and ICS853S02AG-01T, the SI5334C-B04104-GM uniquely balances factory-programmed simplicity, pin-control immediacy, and full any-frequency synthesis - making it optimal for fixed-function telecom and networking hardware where deterministic startup and jitter-critical timing are mandatory.

Availability

SI5334C-B04104-GM is available at Aetrix Electronics and suitable for Ethernet switch/router, PCI Express 2.0/3.0, and broadcast video/audio timing applications requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for SI5334C-B04104-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 wireless, broadband, automotive, and industrial markets.

The Si5334 product line delivers high-performance, low-jitter clock generation for infrastructure equipment demanding precise timing synchronization - designed specifically for telecom line cards, data center switches, and broadcast systems where phase integrity and frequency flexibility are critical.

FAQ

What is the maximum differential input frequency supported by the SI5334C-B04104-GM?

The SI5334C-B04104-GM supports differential input frequencies up to 710 MHz on pins IN1/IN2 and IN5/IN6. This capability enables direct use with high-speed SerDes reference clocks and aligns with standards such as 10G/25G Ethernet and CPRI. The device requires external 100 Ω termination and maintains optimal jitter performance when input slew rate exceeds 0.3 V/ns.

Does the SI5334C-B04104-GM require an external EEPROM or I²C interface to operate?

No, the SI5334C-B04104-GM does not require an external EEPROM or I²C interface. It uses factory-programmed one-time-programmable (OTP) memory and starts operation immediately upon power-up using the predefined configuration. All settings - including output frequencies, formats, and voltages - are fixed at manufacture, eliminating boot-time dependencies.

Can the SI5334C-B04104-GM generate different output formats simultaneously?

Yes, the SI5334C-B04104-GM supports mixed output formats across its four differential pairs: for example, CLK0A/B as LVPECL, CLK1A/B as LVDS, CLK2A/B as HCSL, and CLK3A/B as CMOS. Each output has independent VDDO supply and format selection, enabling direct interfacing to heterogeneous logic families without external level-shifting circuitry.

What is the purpose of the LOSLOL pin on the SI5334C-B04104-GM?

The LOSLOL pin on the SI5334C-B04104-GM is an open-drain alarm output that asserts low under two conditions: loss-of-signal (tLOS = 2.6–5 µs) on the reference input or loss-of-lock (tLOL = 5–10 ms) in the PLL. It provides real-time fault indication to system supervisors or microcontrollers, enabling rapid diagnostics and fail-safe response in carrier-grade equipment.

Is spread spectrum clocking (SSC) supported on all outputs of the SI5334C-B04104-GM?

Spread spectrum clocking on the SI5334C-B04104-GM is only available on outputs configured at exactly 100 MHz and with the corresponding Rn divider set to 1. It complies with PCI Express 2.0 specifications (–0.5% deviation at 30–33 kHz), and can be enabled independently per qualifying output - not globally. Outputs at other frequencies or with Rn ≠ 1 cannot activate SSC.