Skyworks Solutions Inc. SI5338N-B06176-GMR

Overview

SI5338N-B06176-GMR from Skyworks Solutions is an I²C-programmable quad clock generator with four independent differential output drivers, 0.7 ps RMS typical phase jitter, PCIe Gen 1–4 Common Clock and Gen 3 SRNS compliance, and support for LVPECL/LVDS/HCSL/CMOS/SSTL/HSTL output formats across 0.16–710 MHz. It replaces up to four crystal oscillators in high-speed serial interface timing applications.

For engineers reviewing the SI5338N-B06176-GMR datasheet, SI5338N-B06176-GMR pinout, SI5338N-B06176-GMR application, or SI5338N-B06176-GMR equivalent, this device delivers zero-ppm frequency accuracy per output, independent voltage control (1.5/1.8/2.5/3.3 V), glitchless 1-ppm frequency adjustment, and <20 ps phase step resolution - critical for PCIe, Ethernet, and FPGA clocking validation.

Technical Context

The SI5338N-B06176-GMR 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 operates in integer or fractional mode with programmable initial phase offset (±45 ns) and real-time phase/frequency increment/decrement.

It supports external feedback for zero-delay operation, loss-of-lock and loss-of-signal alarms, and spread-spectrum clocking (0.5–5.0% spread, 33–63 kHz modulation) on any output. Input reference flexibility includes 8–30 MHz crystal, 5–200 MHz CMOS, 5–350 MHz SSTL/HSTL, and 5–710 MHz differential signals.

Key Specifications

Pinout & Package

SI5338N-B06176-GMR uses a 24-pin QFN package (4 mm × 4 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are validated per Skyworks Rev. 1.6 datasheet Figure 1 (Top View).

Key Features

Applications

Equivalent & Alternatives

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

Compared with Si5332A-D06176-GM and ICS8430I-01T, SI5338N-B06176-GMR provides optimal balance of programmability, jitter performance, and footprint - offering full I²C configurability in a compact 4×4 mm QFN while meeting PCIe Gen 4 and broadcast video timing requirements without over-specifying for simpler use cases.

Availability

SI5338N-B06176-GMR is available at Aetrix Electronics and suitable for PCIe Gen 4 server platforms, 10 GbE switch/router designs, and broadcast video timing systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for SI5338N-B06176-GMR 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 semiconductors, specializing in RF, timing, and connectivity solutions for infrastructure, automotive, and mobile markets.

The Si5338 product line was designed for high-performance, software-configurable clock generation in data center, telecom, and broadcast applications - replacing multiple fixed-frequency oscillators with a single programmable IC.

FAQ

What is the maximum output frequency supported by SI5338N-B06176-GMR?

The SI5338N-B06176-GMR supports up to 710 MHz on LVPECL/LVDS/CML outputs, 350 MHz on SSTL/HSTL, 250 MHz on HCSL, and 200 MHz on CMOS. Only two unique frequencies above 350 MHz can be simultaneously generated (Fvco/4 and Fvco/6), as confirmed in Table 6 Note 6 of the Skyworks datasheet Rev. 1.6.

Does SI5338N-B06176-GMR support PCIe Gen 4 timing requirements?

Yes, SI5338N-B06176-GMR meets PCIe Gen 4 common clock jitter specifications (0.15–0.45 ps RMS, 10 kHz–50 MHz) per Table 12 of the Skyworks datasheet Rev. 1.6. It is explicitly listed as PCIe Gen 1/2/3/4 Common Clock and Gen 3 SRNS compliant in the device features.

Can SI5338N-B06176-GMR generate different output voltages on each channel?

Yes, SI5338N-B06176-GMR provides independent VDDO0–VDDO3 pins, allowing each of its four output banks to be powered at 1.5 V, 1.8 V, 2.5 V, or 3.3 V. This enables mixed-signal systems to drive LVDS (2.5 V), HCSL (1.8 V), and CMOS (3.3 V) loads simultaneously without level-shifting components.

What reference inputs does SI5338N-B06176-GMR accept?

SI5338N-B06176-GMR accepts six reference inputs: differential (IN1/IN2, IN5/IN6) at 5–710 MHz; single-ended (IN3/IN4) at 5–200 MHz CMOS; and an external crystal (8–30 MHz) connected to IN1/IN2. All inputs support loss-of-signal detection with 2.6–5 µs response time (Table 5).

Is ClockBuilder Pro software required to configure SI5338N-B06176-GMR?

No, ClockBuilder Pro is optional but strongly recommended for SI5338N-B06176-GMR configuration. The device supports direct I²C/SMBus programming per register map (Section 6 of datasheet), but ClockBuilder Pro automates MultiSynth™ divider calculation, jitter optimization, and configuration file generation - significantly reducing development time versus manual register writes.