Skyworks Solutions Inc. SI5351C-B06077-GM

Overview

SI5351C-B06077-GM from Skyworks Solutions is an I²C-programmable 4-output CMOS clock generator with external reference (CLKIN) synchronization capability, 2.5 kHz–200 MHz output frequency range, <70 ps pk-pk period jitter, and independent 1.8/2.5/3.3 V output supply rails. It replaces crystals, crystal oscillators, and VCXOs in residential gateways and networking equipment.

For engineers reviewing the SI5351C-B06077-GM datasheet, SI5351C-B06077-GM pinout, SI5351C-B06077-GM application, or SI5351C-B06077-GM equivalent, key selection criteria include CLKIN-synchronized multi-domain clock synthesis, VCXO-free operation, programmable spread spectrum per output, and 16-QFN (3×3 mm) package compatibility with HCSL-compatible swing and static phase offset support.

Technical Context

The SI5351C-B06077-GM implements a dual-PLL architecture where PLLA and PLLB accept either a 25/27 MHz crystal or an external 10–100 MHz CLKIN reference. Its eight MultiSynth fractional dividers enable independent frequency synthesis per output with 0 ppm error and configurable rise/fall times.

It supports glitchless frequency changes, adjustable output delay, and separate core (2.5/3.3 V) and output (1.8/2.5/3.3 V) supply domains. The device operates across –40°C to +85°C and features excellent PSRR, eliminating need for external power supply filtering.

Key Specifications

Pinout & Package

SI5351C-B06077-GM is housed in a 16-pin QFN package (3 mm × 3 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are validated per Skyworks Si5351C 16-QFN pinout specification (Rev. 1.3, Section 10.6).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SI5351C-B06077-GM, Si5351B-B-GM1 adds analog VCXO tuning but removes CLKIN capability, while Si5351A-B-GM1 sacrifices both features for lowest cost-making SI5351C-B06077-GM the only option for CLKIN-synchronized, multi-domain clock synthesis in 16-QFN form factor.

Availability

SI5351C-B06077-GM is available at Aetrix Electronics and suitable for residential gateways, networking equipment, laser range finders, and audio/video equipment requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for SI5351C-B06077-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 infrastructure, automotive, and mobile markets.

The Si5351 family is designed for flexible, low-cost clock generation in space-constrained applications-enabling replacement of multiple discrete timing components with a single I²C-programmable device.

FAQ

What reference inputs does the SI5351C-B06077-GM support?

The SI5351C-B06077-GM supports both a 25 MHz or 27 MHz crystal connected to XA/XB pins and an external 10–100 MHz clock applied to the CLKIN pin. Unlike Si5351A/B variants, the SI5351C-B06077-GM uses CLKIN as its primary synchronization source-enabling deterministic phase alignment across all four outputs relative to the external reference.

How many outputs does the SI5351C-B06077-GM provide, and what are their voltage options?

The SI5351C-B06077-GM provides four CMOS clock outputs (CLK0–CLK3). Each output group has its own dedicated supply rail (VDDOA–VDDOD), supporting independent selection of 1.8 V, 2.5 V, or 3.3 V logic levels-allowing direct interfacing with mixed-voltage SoCs, FPGAs, and microcontrollers without external level shifters.

Does the SI5351C-B06077-GM support spread spectrum clocking?

Yes, the SI5351C-B06077-GM supports programmable spread spectrum clocking on each output independently. It offers down-spread (–0.1% to –2.5%) or center-spread (±0.1% to ±1.5%) modes modulated at 31.5 kHz-reducing electromagnetic interference without affecting timing margins of adjacent clock domains.

What is the typical period jitter performance of the SI5351C-B06077-GM?

The SI5351C-B06077-GM delivers typical period jitter of <70 ps pk-pk when all four outputs are active in the 16-QFN package. This specification is measured under standard conditions (VDD = 3.3 V, TA = 25°C, CL = 5 pF) and applies to default high-drive-strength outputs with 50 Ω impedance-meeting requirements for PCIe Gen 1 and high-speed serial interfaces.

Can the SI5351C-B06077-GM generate frequencies above 112.5 MHz?

Yes, the SI5351C-B06077-GM can generate frequencies up to 200 MHz, but only two unique frequencies above 112.5 MHz may be active simultaneously. For example, 125 MHz and 150 MHz may be assigned to different outputs, but a third distinct frequency >112.5 MHz (e.g., 133 MHz) cannot be generated concurrently-this constraint arises from internal PLL bandwidth limitations.