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Skyworks Solutions Inc. SI5345D-B03778-GMR
- Part No.:
- SI5345D-B03778-GMR
- Manufacturer:
- Skyworks Solutions Inc.
- Package:
- -
- Datasheet:
-
SI5345D-B03778-GMR.pdf
- Description:
- IC CLK MULTIPLIER ATTENUATOR
- Quantity:
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Product details
Overview
SI5345D-B03778-GMR from Skyworks is a 10-channel, any-frequency jitter attenuator/clock multiplier with fourth-generation DSPLL™ and MultiSynth™ architecture. It delivers ultra-low 90 fs rms jitter, supports differential inputs up to 750 MHz and outputs up to 1028 MHz, and operates in free-run, locked, or holdover modes - enabling precise timing in SyncE-compliant 100 GbE line cards and OTN transponders.
For engineers reviewing the SI5345D-B03778-GMR datasheet, SI5345D-B03778-GMR pinout, SI5345D-B03778-GMR application, or SI5345D-B03778-GMR equivalent, key selection factors include its G.8262 EEC Option 1/2 compliance, programmable jitter attenuation bandwidth (0.1 Hz–4 kHz), 64-QFN 9×9 mm package, I²C/SPI configurability, and factory-programmed NVM for known-power-up frequency configuration.
Technical Context
The SI5345D-B03778-GMR implements a fourth-generation DSPLL with fully integrated loop filter and digitally programmable loop bandwidth (0.1 Hz–4 kHz), enabling application-level jitter optimization. Its MultiSynth architecture uses fractional-N synthesis (Mn/Md) and integer-R division to generate any output frequency from any input, supporting hitless switching between fractionally related clocks and glitchless transitions across ±500 ppm frequency offsets.
It features four configurable inputs (IN0–IN3), ten outputs (OUT0–OUT9), and dual reference paths: external crystal (25–54 MHz on XA/XB) for freerun/holdover stability, and selectable input clock sources for phase-locked operation. Status monitoring includes LOS, OOF, and LOL flags, with interrupt support via INTRb pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Jitter (RMS) | 90 fs - meets stringent ITU-T G.8262 EEC Option 1/2 requirements for SyncE applications |
| Input Range (Diff) | 8 kHz–750 MHz - supports legacy SONET/SDH, Ethernet, and broadcast video reference clocks |
| Output Range (Diff) | 100 Hz–1028 MHz - covers 10/40/100 GbE, OTN, and test equipment clocking needs |
| Jitter BW Control | 0.1 Hz–4 kHz - digitally programmable to balance input jitter attenuation vs. wander rejection |
| Supply Voltages | VDD = 1.8 V ±5%, VDDA = 3.3 V ±5% - enables low-power core logic with high-fidelity analog supply |
| Operating Temp | –40 °C to +85 °C - qualified for industrial and telecom infrastructure environments |
| Package | 64-QFN 9×9 mm - surface-mount footprint with thermal pad for stable thermal performance |
Pinout & Package
The SI5345D-B03778-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 Rev D datasheet Section 9 (Pin Descriptions).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN0–IN3 | Input Clock Channels | Configurable as differential (LVDS/LVPECL/CML) or single-ended LVCMOS; support gapped clock locking and hitless switching |
| OUT0–OUT9 | Output Clock Channels | Individually programmable for LVDS, LVPECL, LVCMOS, CML, or HCSL; each with independent amplitude and common-mode control |
| XA/XB | Crystal Oscillator Input | Accepts 25–54 MHz fundamental-mode crystal; internal load caps eliminate external components |
| SCL/SDA | I²C Interface | Two-wire serial interface for configuration and status readback; compatible with standard I²C masters |
| INTRb | Status Interrupt Output | Open-drain active-low flag indicating LOS, OOF, or LOL events; enables real-time fault monitoring |
Key Features
| Feature | Design Value |
|---|---|
| Any-frequency synthesis | Generates arbitrary output frequencies from any input using fractional-N DSPLL + MultiSynth dividers |
| Holdover frequency averaging | Stores 120 s of historical lock data; calculates final holdover frequency from programmable window to minimize phase disturbance |
| Ramped holdover exit | Linearly ramps output frequency during holdover recovery using user-selectable rates (0.2–40,000 ppm/s) |
| Digital Controlled Oscillator (DCO) | Enables fine frequency tuning (as low as 0.001 ppb step size) in freerun or locked mode via FINC/FDEC pins or register |
| Zero-delay mode | Configures IN3 as feedback input (FB_IN) to align output phase with selected input - critical for deterministic latency paths |
Applications
| OTN Transponders | SyncE Line Cards |
|---|---|
Use Scenario: Timing recovery and distribution in 100G/400G OTN muxponders requiring sub-100 fs jitter and G.8262 compliance. IC Role / Device Role / Timing Role: Jitter attenuator and clock multiplier that cleans and multiplies recovered line-rate clocks while maintaining phase alignment across multiple SerDes lanes. Use Value: Enables error-free OTU4 framing by reducing accumulated jitter below ITU-T G.709 thresholds. | Use Scenario: Carrier-grade Ethernet switch fabric requiring traceable, wander-controlled synchronization across distributed line cards. IC Role / Device Role / Timing Role: Primary timing IC providing EEC-compliant clock generation and seamless input switching between primary/backup SyncE references. Use Value: Meets G.8262 EEC Option 2 wander limits (<4.6 ppm over 1 s) via programmable low-bandwidth DSPLL operation. |
| Broadcast Video Gear | Test & Measurement |
Use Scenario: Genlock and frame-synchronous clocking in 4K/8K video routers and converters operating at SMPTE ST 2059-2 timing. IC Role / Device Role / Timing Role: Multi-output jitter cleaner synchronizing baseband video, audio, and ancillary data clocks to a master reference. Use Value: Eliminates visible video artifacts by suppressing input jitter to <90 fs rms across all outputs. | Use Scenario: High-precision signal source and analyzer instrumentation requiring ultra-low phase noise and flexible clock tree configuration. IC Role / Device Role / Timing Role: Programmable clock synthesizer generating stimulus and sampling clocks with sub-picosecond edge placement accuracy. Use Value: Supports <1 ps RMS period jitter measurements by delivering clean, stable, and independently configurable clock domains. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar jitter attenuator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si5345A-B03778-GMR | Supports full 0.001–1028 MHz output range with integer+fractional synthesis; SI5345D is limited to ≤350 MHz output | Required for >350 MHz outputs (e.g., 100G KR4 SerDes, PCIe Gen4) | Select SI5345A when higher-frequency outputs are needed; SI5345D suffices for SyncE, OTN, and broadcast video where outputs ≤350 MHz dominate |
| LMK04832ISQE/NOPB | TI dual-loop jitter cleaner with 315 fs rms jitter; supports JESD204B subclass 1; no integrated crystal oscillator | Better suited for RF/data converter timing with deterministic latency; requires external TCXO/OCXO | Choose LMK04832 for JESD204B systems needing ultra-low latency; SI5345D offers superior jitter (90 fs) and integrated crystal support for telecom infrastructure |
Compared with Si5345A-B03778-GMR, SI5345D-B03778-GMR trades maximum output frequency for cost-optimized silicon targeting sub-350 MHz SyncE and OTN use cases; versus LMK04832, it provides lower jitter and integrated crystal interface but lacks JESD204B-specific features.
Availability
SI5345D-B03778-GMR is available at Aetrix Electronics and suitable for OTN transponders, SyncE line cards, broadcast video gear, and test equipment requiring stable component supply, long-term lifecycle assurance, and G.8262-compliant timing performance.
Supply support for SI5345D-B03778-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 communications, automotive, and industrial markets.
The SI5345D-B03778-GMR belongs to Skyworks' Si5345 family of jitter-attenuating clock multipliers, designed specifically for high-reliability telecom infrastructure requiring ultra-low jitter, holdover resilience, and G.8262 compliance.
FAQ
What is the maximum output frequency supported by the SI5345D-B03778-GMR?
The SI5345D-B03778-GMR supports differential output frequencies up to 350 MHz, as defined in Skyworks' Ordering Guide for the "D" variant. This distinguishes it from the "A" variant (up to 1028 MHz) and makes it optimized for SyncE, OTN, and broadcast video applications where outputs ≤350 MHz are typical. The SI5345D-B03778-GMR maintains full 90 fs rms jitter performance within this range.
Does the SI5345D-B03778-GMR include non-volatile memory for configuration storage?
Yes, the SI5345D-B03778-GMR integrates in-circuit programmable one-time-programmable (OTP) non-volatile memory. This allows the device to power up with a known, factory-preprogrammed frequency configuration - eliminating boot-time initialization delays and ensuring deterministic timing behavior. Configuration of the SI5345D-B03778-GMR is performed via I²C or SPI interface using ClockBuilder Pro software.
How does the SI5345D-B03778-GMR achieve G.8262 EEC compliance?
The SI5345D-B03778-GMR meets ITU-T G.8262 EEC Option 1 and Option 2 through its digitally programmable DSPLL loop bandwidth (0.1 Hz–4 kHz), which enables precise trade-offs between jitter attenuation and wander rejection. When configured with a low loop bandwidth (e.g., 0.1 Hz) and paired with a TCXO on XA/XB, the SI5345D-B03778-GMR satisfies the strict phase wander limits required for carrier-grade Ethernet synchronization.
Can the SI5345D-B03778-GMR operate without an external crystal?
No - the SI5345D-B03778-GMR requires an external crystal (25–54 MHz) connected to the XA/XB pins to provide the stable reference for freerun and holdover modes. While it accepts external REFCLK signals, the crystal is mandatory for guaranteed jitter performance and holdover stability. The SI5345D-B03778-GMR includes internal loading capacitors, eliminating the need for external CL components.
What input clock switching modes does the SI5345D-B03778-GMR support?
The SI5345D-B03778-GMR supports manual (via IN_SEL pins or register), automatic (priority-based state machine), hitless (for fractionally related clocks), ramped (for plesiochronous clocks), and glitchless (±500 ppm offset) input switching. All modes preserve output phase continuity, and the SI5345D-B03778-GMR automatically enters holdover if no valid input is available - ensuring uninterrupted timing in mission-critical telecom systems.
SI5345D-B03778-GMR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- *
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- -
- PLL:
- -
- Input:
- -
- Output:
- -
- Number of Circuits:
- -
- Ratio - Input:Output:
- -
- Differential - Input:Output:
- -
- Frequency - Max:
- -
- Divider/Multiplier:
- -
- Voltage - Supply:
- -
- Operating Temperature:
- -
- Mounting Type:
- -
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- -
SI5345D-B03778-GMR FAQ
1.How can I place an order for SI5345D-B03778-GMR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI5345D-B03778-GMR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SI5345D-B03778-GMR reliable?
The price and inventory of SI5345D-B03778-GMR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI5345D-B03778-GMR is usually 5 days.
3.What payment methods are accepted for SI5345D-B03778-GMR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI5345D-B03778-GMR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI5345D-B03778-GMR?
SI5345D-B03778-GMR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI5345D-B03778-GMR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SI5345D-B03778-GMR?
For technical support, including SI5345D-B03778-GMR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI5345D-B03778-GMR requirements.
6.How does Aetrix verify that SI5345D-B03778-GMR is sourced from the original manufacturer or authorized distributors?
All SI5345D-B03778-GMR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SI5345D-B03778-GMR meets industry standards.
7.What is the process for return or replacement of SI5345D-B03778-GMR?
All SI5345D-B03778-GMR units undergo pre-shipment inspection (PSI). If there is an issue with SI5345D-B03778-GMR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SI5345D-B03778-GMR part is unused and in its original packaging.
Return procedure for SI5345D-B03778-GMR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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