Skyworks Solutions Inc. SI5338A-B06088-GM

Overview

SI5338A-B06088-GM from Skyworks Solutions is a quad-output, I²C-programmable clock generator with MultiSynth™ frequency synthesis. It delivers four independent, any-frequency clocks (0.16–710 MHz) with 0.7 ps RMS typical phase jitter, PCIe Gen 1–4 and SRNS compliance, and configurable LVPECL/LVDS/HCSL/CMOS outputs. It replaces up to four crystal oscillators in high-speed serial interface timing applications such as PCIe switch cards and 10 GbE line cards.

For engineers reviewing the SI5338A-B06088-GM datasheet, SI5338A-B06088-GM pinout, SI5338A-B06088-GM application, or SI5338A-B06088-GM equivalent, key selection criteria include differential output jitter performance at 100 MHz HCSL, spread-spectrum modulation configurability per output, independent VDDO voltage assignment (1.5–3.3 V), and support for external crystal (8–30 MHz) or high-frequency differential inputs (up to 710 MHz).

Technical Context

The SI5338A-B06088-GM implements a two-stage PLL architecture: a high-stability input stage locks to one of six reference inputs (crystal, CMOS, SSTL/HSTL, or differential), followed by four independent MultiSynth™ fractional-N synthesis blocks. Each output driver supports integer or fractional mode operation with programmable initial phase offset (±45 ns) and glitchless frequency increment/decrement in 1 ppm steps.

Its functional block includes on-chip OTP NVM for configuration storage, I²C/SMBus interface with interrupt (INTR) signaling, loss-of-lock and loss-of-signal alarms, and external feedback capability for zero-delay mode. The device operates across –40 to +85 °C with core supply options of 1.8 V, 2.5 V, or 3.3 V and independent output buffer supplies (VDDO0–VDDO3).

Key Specifications

Pinout & Package

SI5338A-B06088-GM uses a 24-lead QFN package (4 mm × 4 mm, 0.5 mm pitch) 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-output programmable clock generator applications.

Compared with Si5338A-B06109-GM, SI5338A-B06088-GM offers full field programmability via I²C rather than factory-fixed settings, enabling dynamic reconfiguration. Compared with LMK04832ISQE/NOPB, SI5338A-B06088-GM provides finer per-output control (SSC, phase, voltage) at lower power and smaller footprint, though with less deterministic latency for JESD204B.

Availability

SI5338A-B06088-GM is available at Aetrix Electronics and suitable for PCIe switch timing, 10 GbE line cards, broadcast video synchronization, and FPGA clock domain crossing requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for SI5338A-B06088-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 precision analog ICs.

The Si5338 product line was designed for high-performance, multi-protocol serial interface timing-enabling consolidation of discrete oscillators and buffers in networking, computing, and communications infrastructure equipment.

FAQ

What is the primary function of the SI5338A-B06088-GM?

The SI5338A-B06088-GM is an I²C-programmable quad-output clock generator using Skyworks' MultiSynth™ technology to synthesize any frequency from 0.16 to 710 MHz on each output with 0.7 ps RMS typical phase jitter. It serves as a flexible, low-jitter timing solution for PCIe, Ethernet, broadcast video, and FPGA applications where multiple precise clock domains are required.

Does the SI5338A-B06088-GM support PCIe Gen 4 timing requirements?

Yes, the SI5338A-B06088-GM meets PCIe Gen 4 Common Clock RMS jitter specifications (≤0.45 ps) when configured with HCSL outputs at 100 MHz and appropriate PLL bandwidth (2–5 MHz). Its jitter performance is validated per PCI-SIG test methodology using the Skyworks PCIe Clock Jitter Tool and Intel Clock Jitter Tool v1.6.4.

Can the SI5338A-B06088-GM generate different output voltages simultaneously?

Yes, the SI5338A-B06088-GM supports independent output buffer supplies (VDDO0–VDDO3), allowing simultaneous LVPECL (2.5 V), LVDS (1.8 V), HCSL (1.5 V), and CMOS (3.3 V) outputs on its four differential pairs. This enables direct interfacing with mixed-voltage ASICs, FPGAs, and PHYs without external level translators.

How is the SI5338A-B06088-GM programmed and configured?

The SI5338A-B06088-GM is programmed via its I²C/SMBus-compatible interface (SCL/SDA pins) using Skyworks' ClockBuilder Pro software. Configuration includes output format, frequency, VDDO voltage, spread spectrum, phase offset, and alarm thresholds. Factory OTP memory retains settings for immediate operation after power-up.

What reference inputs does the SI5338A-B06088-GM accept?

The SI5338A-B06088-GM accepts six reference input types: external crystal (8–30 MHz), single-ended CMOS (5–200 MHz), SSTL/HSTL (5–350 MHz), or differential (5–710 MHz on IN1/IN2 or IN5/IN6). Input selection and conditioning are fully configurable via I²C registers, supporting flexible system-level clock tree design.