Skyworks Solutions Inc. SI5338B-B06190-GM

Overview

SI5338B-B06190-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 Ethernet switch/router, processor/FPGA clocking, and 1/10 GbE timing systems.

For engineers reviewing the SI5338B-B06190-GM datasheet, SI5338B-B06190-GM pinout, SI5338B-B06190-GM application, or SI5338B-B06190-GM equivalent, key selection criteria include its MultiSynth™-based any-frequency synthesis (0.16–710 MHz per output), independent output voltage control (1.5/1.8/2.5/3.3 V), ±20 ps phase step resolution, and spread-spectrum capability (0.5–5.0% down-spread, 33–63 kHz modulation).

Technical Context

The SI5338B-B06190-GM implements a two-stage PLL architecture: a high-stability reference stage (VCO-based) followed by four independent MultiSynth™ fractional-N synthesis blocks, each driving one output pair (CLKxA/CLKxB). Input flexibility includes external crystal (8–30 MHz), CMOS (5–200 MHz), SSTL/HSTL (5–350 MHz), or differential (5–710 MHz) references.

Each output supports LVPECL/LVDS/HCSL/CMOS/SSTL/HSTL formats with independent voltage rail assignment (VDDO0–VDDO3), programmable initial phase offset (±45 ns), and glitchless frequency increment/decrement in 1 ppm steps. Loss-of-lock and loss-of-signal alarms are integrated for system monitoring.

Key Specifications

Pinout & Package

SI5338B-B06190-GM uses a 24-lead QFN package (4 × 4 mm, 0.5 mm pitch) with exposed thermal pad. Pin assignments follow Skyworks' standard Si5338 pinout: IN1–IN6 (six input clocks), CLK0A/CLK0B through CLK3A/CLK3B (four differential output pairs), VDDO0–VDDO3 (independent output supply rails), VDD (core supply), SCL/SDA (I²C bus), INTR (interrupt output), and RSVD_GND (reserved ground).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SI5338B-B06190-GM, the Si5332A offers greater output count and lower jitter but requires PCB redesign and firmware rework, while the ICS853S02AG-01 sacrifices programmability for lower unit cost and simpler validation - making SI5338B-B06190-GM optimal for flexible, field-upgradable timing architectures.

Availability

SI5338B-B06190-GM is available at Aetrix Electronics and suitable for Ethernet switch/router, PCIe Gen 3/4 server platforms, and broadcast video timing applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for SI5338B-B06190-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 power management ICs for communications, automotive, and industrial markets.

The SI5338B-B06190-GM belongs to Skyworks' Si5338 family of programmable clock generators, designed specifically for high-density, multi-protocol timing consolidation in networking, computing, and broadcast equipment where jitter performance and configurability are critical.

FAQ

What is the maximum output frequency supported by SI5338B-B06190-GM in LVPECL mode?

The SI5338B-B06190-GM supports LVPECL outputs up to 710 MHz, as confirmed in Table 6 of the datasheet. This applies when using differential outputs with appropriate termination and load conditions. Operation above 350 MHz is limited to two unique frequencies simultaneously (Fvco/4 and Fvco/6), and jitter performance remains within specification at full range when using low-noise input references.

Does SI5338B-B06190-GM support PCIe Gen 4 Common Clock compliance?

Yes, SI5338B-B06190-GM meets PCIe Gen 4 Common Clock jitter requirements with 0.15–0.45 ps RMS (10 kHz–50 MHz), verified per PCI-Express Base Specification 4.0 rev. 0.5. Testing used 100 MHz HCSL outputs and the Skyworks PCIe Clock Jitter Tool, confirming compliance under specified PLL bandwidth (2–5 MHz) and CDR (10 MHz) conditions.

Can SI5338B-B06190-GM generate different output voltages on separate channels?

Yes, SI5338B-B06190-GM provides independent VDDO0–VDDO3 rails, allowing distinct output buffer supply voltages (1.4–3.63 V) per channel. For example, CLK0A/B can be configured as 3.3 V LVPECL while CLK2A/B operates as 1.8 V LVDS - enabling direct interfacing with mixed-voltage SoCs and FPGAs without level shifters.

How is SI5338B-B06190-GM programmed, and is external hardware required?

SI5338B-B06190-GM is programmed via its I²C/SMBus-compatible interface using ClockBuilder Pro software (free download from Skyworks). No external programmer is needed - standard I²C master (e.g., MCU or PC-based adapter) suffices. Configuration can be stored in on-chip OTP memory for autonomous boot, or updated dynamically in-system.

What is the thermal performance of SI5338B-B06190-GM in a typical 4-layer PCB layout?

SI5338B-B06190-GM has a junction-to-ambient thermal resistance (θJA) of 37 °C/W under still-air conditions. With proper PCB land pattern (per Skyworks AN111), thermal pad soldering, and 1–2 cm² copper pour, typical junction temperature rise is <25 °C at 45 mA core current - well within the –40 to +85 °C operating range even in enclosed industrial enclosures.