Skyworks Solutions Inc. SI5342D-B06182-GMR

Overview

SI5342D-B06182-GMR from Skyworks is a 4-input, 2-output jitter-attenuating clock multiplier with DSPLL™ and MultiSynth™ architecture, delivering 90 fs rms jitter, programmable loop bandwidth (0.1 Hz–4 kHz), and support for LVDS/LVPECL/LVCMOS/CML/HCSL outputs. It operates across –40 to +85 °C and meets ITU-T G.8262 EEC Option 1 & 2 for Synchronous Ethernet applications.

For engineers reviewing the SI5342D-B06182-GMR datasheet, SI5342D-B06182-GMR pinout, SI5342D-B06182-GMR application, or SI5342D-B06182-GMR equivalent, this device serves as a precision timing solution in carrier-grade networking line cards, broadcast video infrastructure, and test equipment requiring ultra-low jitter, hitless clock switching, and holdover stability with external crystal reference.

Technical Context

The SI5342D-B06182-GMR implements a fourth-generation DSPLL with fully integrated loop filter and digitally programmable jitter attenuation bandwidth (0.1 Hz–4 kHz), enabling precise optimization of input jitter filtering per application. Its MultiSynth output dividers support both integer and fractional synthesis, allowing any-output-frequency generation from any-input-frequency within specified ranges.

It features automatic/manual input clock selection across four inputs (IN0–IN3), glitchless and hitless switching between plesiochronous or phase-locked sources, and configurable holdover using up to 120 seconds of historical frequency data. The device uses an external 25–54 MHz crystal on XA/XB pins for free-run/holdover reference stability and supports I²C/SPI configuration with on-chip NVM for power-up-ready operation.

Key Specifications

Pinout & Package

SI5342D-B06182-GMR is housed in a 44-pin QFN package (7×7 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are validated per Skyworks Si5342 Rev D datasheet Section 9 (Pin Descriptions).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar jitter-attenuating clock multiplier applications.

Compared with SI5342D-B06182-GMR, Si5342C-D-GM1 trades synthesis flexibility for lower unit cost in fixed-ratio applications, while Si5344B-D-GM1 extends channel count within identical thermal and layout constraints-enabling consolidation of timing functions without redesigning power delivery or signal routing.

Availability

SI5342D-B06182-GMR is available at Aetrix Electronics and suitable for OTN muxponders, Carrier Ethernet switches, and broadcast video infrastructure requiring stable component supply, long-term lifecycle support, and guaranteed traceability.

Supply support for SI5342D-B06182-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 semiconductor company specializing in analog and mixed-signal connectivity solutions, with leadership in RF, timing, and precision analog ICs.

The Si5342 family is designed for carrier-grade timing applications demanding ultra-low jitter, robust holdover, and seamless clock redundancy-targeting Synchronous Ethernet, OTN, and broadcast infrastructure where phase integrity and reliability are non-negotiable.

FAQ

What is the maximum differential input frequency supported by the SI5342D-B06182-GMR?

The SI5342D-B06182-GMR supports differential input frequencies from 8 kHz up to 750 MHz, covering SONET OC-192, 100G Ethernet, and OTN OTU4 reference clocks. This range is confirmed in the Si5345/44/42 Rev D datasheet Table 1.2 and applies specifically to the SI5342D-B06182-GMR variant. Operation above 350 MHz requires fractional synthesis mode enabled in ClockBuilder Pro configuration.

Does the SI5342D-B06182-GMR require external loop filter components?

No, the SI5342D-B06182-GMR integrates the entire DSPLL loop filter on-die, eliminating discrete capacitors and resistors. This reduces PCB area, avoids noise coupling from external components, and ensures consistent jitter performance across manufacturing lots and temperature. The design relies solely on the 25–54 MHz crystal connected to XA/XB pins for reference stability.

Can the SI5342D-B06182-GMR generate both 156.25 MHz and 311.04 MHz simultaneously on its two outputs?

Yes, the SI5342D-B06182-GMR can generate 156.25 MHz and 311.04 MHz simultaneously on OUT0 and OUT1. Its dual MultiSynth dividers support independent integer/fractional synthesis per output. This capability is explicitly verified in the Si5342 ordering guide and functional description for the "D" frequency grade (0.001–350 MHz), which includes both frequencies.

What is the purpose of the IN3 pin on the SI5342D-B06182-GMR in zero-delay mode?

In zero-delay mode, the IN3 pin on the SI5342D-B06182-GMR is repurposed as FB_IN (feedback input) to close the delay-compensated loop. This allows the device to align the phase of OUT0/OUT1 with the selected primary input (IN0–IN2) with sub-picosecond residual jitter. The mode is configured via register setting and disables IN3 as a selectable clock source.

How does the SI5342D-B06182-GMR handle loss of input clock during operation?

Upon loss of all valid input clocks, the SI5342D-B06182-GMR automatically enters holdover mode using up to 120 seconds of stored frequency history. It calculates an averaged holdover frequency from a programmable window of that history to minimize phase step at transition. Output stability then depends on the 25–54 MHz crystal connected to XA/XB, supporting SyncE-compliant holdover performance per ITU-T G.8262.