Skyworks Solutions Inc. SI5345D-B03780-GMR

Overview

SI5345D-B03780-GMR from Skyworks is a 10-channel, any-frequency jitter attenuator/clock multiplier featuring fourth-generation DSPLL™ and MultiSynth™ technologies. It delivers ultra-low 90 fs rms jitter, supports differential input frequencies up to 750 MHz and differential outputs up to 1028 MHz, and operates in free-run, synchronous, or holdover modes - deployed in OTN transponders and SyncE-compliant carrier Ethernet switches.

For engineers reviewing the SI5345D-B03780-GMR datasheet, SI5345D-B03780-GMR pinout, SI5345D-B03780-GMR application, or SI5345D-B03780-GMR equivalent, key selection considerations include its programmable jitter attenuation bandwidth (0.1 Hz–4 kHz), G.8262 EEC Option 1/2 compliance, 64-QFN 9×9 mm package, I²C/SPI configurability, and factory-programmed NVM configuration for known-power-up behavior.

Technical Context

The SI5345D-B03780-GMR implements a digitally controlled DSPLL architecture with fractional input dividers (P), fractional MultiSynth output dividers (N), and integer output dividers (R), enabling hitless switching between fractionally related inputs and glitchless on-the-fly frequency changes. Its loop filter is fully integrated, eliminating external components and noise coupling risks.

It supports three operational modes - locked (phase- and frequency-locked to input), freerun (crystal-referenced), and holdover (averaged historical frequency retention up to 120 s) - with programmable holdover window size/delay and ramped exit at user-selectable rates (0.2–40,000 ppm/s). DCO mode enables fine frequency tuning down to 0.001 ppb step size.

Key Specifications

Pinout & Package

SI5345D-B03780-GMR is housed in a 64-pin QFN package (9 mm × 9 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are defined per Skyworks Si5345 64-QFN pinout specification (Rev D datasheet, Section 9).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar jitter attenuator/clock multiplier applications.

Compared with Si5345B-D-GM1, SI5345D-B03780-GMR provides broader frequency coverage (up to 1028 MHz) and retains full fractional synthesis capability; versus LMK04832, it offers lower power, integrated crystal support, and simpler configuration - making it optimal for telecom infrastructure where footprint, jitter, and ease of use are prioritized.

Availability

SI5345D-B03780-GMR is available at Aetrix Electronics and suitable for OTN transponders, SyncE carrier switches, broadcast video systems, and test equipment requiring stable component supply across long-lifecycle deployments.

Supply support for SI5345D-B03780-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 for wireless, broadband, automotive, and industrial markets.

The Si5345 family is engineered for high-performance timing in telecom and networking infrastructure, delivering jitter attenuation, flexible clock synthesis, and robust holdover - specifically targeting ITU-T G.8262 SyncE and OTN compliance.

FAQ

What is the maximum differential output frequency supported by the SI5345D-B03780-GMR?

The SI5345D-B03780-GMR supports differential output frequencies up to 1028 MHz, covering standards such as 100G Ethernet (156.25 MHz × 64), 12G-SDI (594 MHz), and OTN OTU4 (111.81 GHz ÷ 100). This capability is enabled by its fourth-generation MultiSynth divider architecture and is confirmed in the Si5345/44/42 Rev D datasheet Section 1. Features List.

Does the SI5345D-B03780-GMR include non-volatile memory for configuration storage?

Yes, the SI5345D-B03780-GMR integrates in-circuit programmable one-time-programmable (OTP) non-volatile memory (NVM). This allows the device to power up with a known, factory- or user-programmed frequency configuration without requiring external configuration at boot - a feature explicitly documented in the Rev D datasheet Section 1 and Section 3.11.

Is the SI5345D-B03780-GMR compliant with ITU-T G.8262 Synchronous Ethernet standards?

Yes, the SI5345D-B03780-GMR meets ITU-T G.8262 EEC Option 1 and Option 2 specifications for Synchronous Ethernet equipment clocks. This compliance is achieved through its ultra-low 90 fs rms jitter performance and programmable jitter attenuation bandwidth, as stated in the Rev D datasheet Section 1 Features List and Section 3.2 DSPLL Loop Bandwidth.

What input clock types does the SI5345D-B03780-GMR accept?

The SI5345D-B03780-GMR accepts both differential (LVDS, LVPECL, CML, HCSL) and single-ended LVCMOS input clocks. Differential inputs support 8 kHz–750 MHz; LVCMOS inputs support 8 kHz–250 MHz. Input termination schemes and configuration options are detailed in Section 3.7.6 and Figure 3.4 of the Rev D datasheet.

How many output channels does the SI5345D-B03780-GMR provide, and what signal formats are supported?

The SI5345D-B03780-GMR provides 10 independent output channels (OUT0–OUT9), each configurable for LVDS, LVPECL, LVCMOS, CML, or HCSL signaling with programmable amplitude and common-mode voltage. This flexibility is specified in the Rev D datasheet Section 1 Features List and Section 3.9 Outputs.