Skyworks Solutions Inc. SI5338A-B01392-GM

Overview

SI5338A-B01392-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 from 1.8/2.5/3.3 V core supply in a 4 × 4 mm 24-QFN package. It replaces up to four crystal oscillators in high-speed serial interface timing applications.

For engineers reviewing the SI5338A-B01392-GM datasheet, SI5338A-B01392-GM pinout, SI5338A-B01392-GM application, or SI5338A-B01392-GM equivalent, key selection criteria include PCIe Gen 4 jitter compliance (0.15–0.45 ps RMS), independent output voltage per driver (1.5/1.8/2.5/3.3 V), MultiSynth™ frequency synthesis resolution (1 ppb), spread-spectrum control (0.5–5.0% deviation), and loss-of-lock/loss-of-signal alarm support.

Technical Context

The SI5338A-B01392-GM implements a two-stage synthesis architecture: a PLL-based Stage 1 (with 1.6 MHz loop bandwidth) locks to one of six input references (crystal, CMOS, SSTL/HSTL, or differential), followed by four independent MultiSynth™ fractional-N dividers in Stage 2. Each output driver supports format-selectable signaling (LVPECL/LVDS/HCSL/CMOS/SSTL/HSTL) and programmable output voltage.

It features pin-controlled or I²C-driven glitchless frequency increment/decrement in 1 ppm steps, <20 ps phase step accuracy, and configurable spread spectrum on any output (33–63 kHz modulation rate, 0.5–5.0% spread). External feedback mode enables zero-delay operation, while dedicated INTR pin reports loss-of-lock and loss-of-signal events.

Key Specifications

Pinout & Package

The SI5338A-B01392-GM is housed in a 24-lead QFN package (4 × 4 mm, 0.5 mm pitch) with exposed thermal pad. Pin assignments are fixed across the Si5338 family and validated per Skyworks document Rev. 1.6 (August 2021), page 33.

Key Features

Applications

Equivalent & Alternatives

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

Compared with Si5332A-D06889-GM and ICS853S01AGI-01LFT, the SI5338A-B01392-GM uniquely balances programmability, PCIe Gen 4 compliance, and compact 4×4 mm footprint-making it optimal for cost-sensitive, space-constrained designs requiring field-upgradable timing without over-specifying integration.

Availability

SI5338A-B01392-GM is available at Aetrix Electronics and suitable for PCIe Gen 4 switch timing, Ethernet routing infrastructure, and broadcast video equipment requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for SI5338A-B01392-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 for infrastructure, automotive, and mobile markets.

The Si5338 product line delivers programmable, low-jitter clock generation for high-speed serial interfaces-including PCIe, Ethernet, Fibre Channel, and broadcast video-enabling system architects to consolidate timing functions and reduce design complexity.

FAQ

What is the maximum output frequency supported by the SI5338A-B01392-GM?

The SI5338A-B01392-GM supports up to 710 MHz on LVPECL/LVDS/CML outputs, 350 MHz on SSTL/HSTL, 250 MHz on HCSL, and 200 MHz on CMOS. However, only two unique frequencies above 350 MHz can be generated simultaneously-specifically Fvco/4 and Fvco/6-as confirmed in Table 6 Note 6 of the Skyworks Rev. 1.6 datasheet.

Does the SI5338A-B01392-GM meet PCIe Gen 4 jitter specifications?

Yes, the SI5338A-B01392-GM meets PCIe Gen 4 common clock jitter requirements: 0.15–0.45 ps RMS (10 kHz–50 MHz band) with PLL bandwidth set to 2–5 MHz and CDR at 10 MHz, as verified in Table 12 of the Skyworks Rev. 1.6 datasheet and validated using the Skyworks PCIe Clock Jitter Tool.

Can the SI5338A-B01392-GM generate different output voltages on each channel?

Yes-the SI5338A-B01392-GM provides independent VDDO0–VDDO3 supplies, allowing each of its four output banks to operate at 1.5 V, 1.8 V, 2.5 V, or 3.3 V. This enables simultaneous LVDS (2.5 V), HCSL (1.8 V), and CMOS (3.3 V) signaling without external level shifters.

How is the SI5338A-B01392-GM programmed and configured?

The SI5338A-B01392-GM is programmed via its I²C/SMBus-compatible interface using Skyworks' ClockBuilder Pro software, which auto-generates register maps, validates configurations, and exports .c files for embedded initialization. Configuration persists in on-chip OTP NVM after power cycle.

What alarm functions does the SI5338A-B01392-GM provide?

The SI5338A-B01392-GM provides dedicated loss-of-lock (LOL) and loss-of-signal (LOS) detection with configurable thresholds, reported through the open-drain INTR pin. Detection times are 5–10 ms for LOL and 2.6–5 µs for LOS, as specified in Table 5 of the Skyworks Rev. 1.6 datasheet.