SI5341A-D-GM - 10-Output Any-Frequency Clock Generator | Skyworks
MPN: SI5341A-D-GM ✓ Hoạt độngSI5341A-D-GM Tóm tắt
A clock generator is a precision timing IC that accepts one or more low-frequency references (crystal, XO, or recovered clock) and synthesizes multiple clean, independent high-frequency output clocks for SoCs, FPGAs, ASICs, ADCs, DACs, and PHYs. The "any-frequency, any-output" architecture means each of the 10 outputs can be a different frequency and a different format without external loop filters, so a single Si5341A replaces multiple XO/VCXO parts.
Key features include 0.09 ps RMS typical phase jitter, fractional-N synthesis (1 ppb resolution), independent per-output dividers, programmable output slew rates, output enable/format pins, hardware configuration via I2C/SPI, and field-upgradeable NVM. Hardware configurations are stored in on-chip non-volatile memory and applied at power-up, allowing fully autonomous boot without host intervention. The QFN-64 with exposed thermal pad provides thermal resistance suitable for the 1 W typical operating dissipation.
The architecture combines a low-noise integer PLL reference path with MultiSynth fractional output stages that suppress fractional spurs below -75 dBc even at non-integer frequency plans. This enables clean clock trees in systems where reference and backplane frequencies are unrelated (100G/400G Ethernet, OTN, wireless baseband, JESD204B ADC/DAC clocks).
Typical applications include 100G/200G/400G Ethernet switch and router timing, OTN/WDM optical transport clock generation, JESD204B/C SYSREF for high-speed ADC and DAC converters, FPGA and ASIC reference clock trees, wireless base-station fronthaul, and broadcast video reference distribution. The wide output frequency range (0.0001 MHz to 1028 MHz) covers virtually any timing requirement in modern high-speed serial systems.
Each output supports independent format and frequency, so a single Si5341A can supply SYSREF, device clock, and reference clock to a JESD204B subsystem simultaneously while also driving a backplane SerDes at a different rate. This consolidation replaces a rack of XO crystals and fanout buffers and reduces BOM cost.
When designing with the Si5341A, use Skyworks ClockBuilder Pro for prototype configuration and always order factory pre-programmed OPN variants (e.g., Si5341A-Dxxxx-GM) for production to lock the configuration as a one-time programmable NVM image.
Bộ thay thế dễ dàng lắp đặt cho SI5341A-D-GM — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với SI5341A-D-GM (cùng hình factor và footprint) — khác nhau ở Number of Outputs, Package, Configuration Interface, Function, Operating Temperature.
SI5341A-B-GM
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
SI5340A-D-GM
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →SI5341A-D-GMR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
SI5341A-D07511-GM
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
SI5341A-D07228-GM
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →SiT95141
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
SI5341A-D-GM Thông số kỹ thuật
| Chức năng | 10-output any-frequency any-output clock generator |
| Số lượng đầu ra | 10 differential (configurable per-output format) |
| Maximum Output Frequency | 1028 MHz |
| Minimum Output Frequency | 0.0001 MHz (0.1 Hz) |
| Phase Jitter (12 kHz to 20 MHz) | 0.09 ps RMS typical |
| Điện áp cung cấp | 1.71 V to 3.47 V |
| Reference Inputs | 4 (LVCMOS, LVDS, LVPECL, HCSL) |
| Output Formats | LVDS, LVPECL, HCSL, LVCMOS, CMOS (per-pin) |
| Synthesis Technology | MultiSynth fractional divider + integer PLL |
| Frequency Resolution | 1 ppb |
| Configuration Interface | I2C, SPI, on-chip NVM |
| Hộp | 64-VFQFN Exposed Pad (QFN-64) |
| Nhiệt độ hoạt động | -40 C to +85 C |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant |
Hướng dẫn cấu hình chân SI5341A-D-GM 64-vfqfn exposed pad (qfn-64)
Cấu hình chân cho SI5341A-D-GM (64-vfqfn exposed pad (qfn-64) gói). Số thứ tự chân, chức năng và sơ đồ kết nối được xác định trong tài liệu thông số kỹ thuật của nhà sản xuất. Tham khảo nó để biết footprint và hướng dẫn hàn chính xác.
Không có dữ liệu chân cụ thể sẵn có cho SI5341A-D-GM.
Tham khảo: tài liệu kỹ thuật cho cấu hình chân đầy đủ.
Ứng dụng tiêu biểu
SI5341A-D-GM phù hợp cho 6 Áp dụngs: 100G/200G/400G Ethernet Switch Timing, JESD204B/C ADC/DAC Converter Clock Tree, FPGA and ASIC Reference Clock Distribution, Wireless Base Station Fronthaul (CPRI/eCPRI), OTN/WDM Optical Transport Equipment, Broadcast Video and Reference Distribution.
100G/200G/400G Ethernet Switch Timing
The SI5341A-D-GM delivers 10 independent clocks at up to 1028 MHz with 0.09 ps RMS jitter, directly meeting the SerDes reference clock budgets of QSFP28, QSFP-DD, and OSFP transceivers. MultiSynth fractional dividers generate per-port frequencies from a single 25 MHz TCXO/OCXO reference without dedicated XO crystals for each port, cutting BOM and simplifying reference-tree design. Independent per-pin output format selection lets the same chip drive LVDS PHY and HCSL backplane simultaneously. The on-chip NVM eliminates host-controller boot dependency, which matters in managed switches that boot from cold-start.
Được đề xuất
JESD204B/C ADC/DAC Converter Clock Tree
For JESD204B/C sub-class 1 converters the SI5341A-D-GM provides the device clock, SYSREF, and frame clock from a single IC with deterministic latency across power cycles. The 0.09 ps phase jitter stays well below the JESD204B budgets for 12.5 Gbps lane rates, supporting 16-bit ADCs at 500+ MSPS. The MultiSynth synthesizer aligns SYSREF to device clock phase within 1 ppb resolution, removing the SYSREF-to-clock skew that traditionally forces external delay lines. A typical AFE7950 or ADC12DJ5200 design uses one SI5341A per converter cluster plus reference fanout.
Được đề xuất
FPGA and ASIC Reference Clock Distribution
Modern FPGAs and ASICs need up to a dozen unrelated clocks (Transceiver ref, GT/s SerDes, PCIe, DDR, sys clock, debug clock). The SI5341A-D-GM supplies 10 independent outputs at any mix of LVDS, LVCMOS, and HCSL from one board, replacing a fanout buffer plus crystal array. Per-output dividers and slew-rate control let one chip serve Xilinx Versal GTY, Altera Agilex, and ASIC SerDes simultaneously. The exposed-pad QFN provides ~28 C/W theta-JA, sufficient for the device's 1 W typical dissipation without forced airflow in production cards.
Được đề xuất
Wireless Base Station Fronthaul (CPRI/eCPRI)
In 4G/5G baseband units the SI5341A-D-GM generates the precise CPRI line clocks (1.2288/2.4576/3.072/4.9152/6.144 GHz) plus system clocks for SerDes fronthaul, all from a single GPS-disciplined TCXO reference. The 0.09 ps jitter maximizes the CPRI link budget at long fiber spans, and the integer-PLL reference path maintains synchronization during GPS holdover. Per-pin output enable and frequency-change registers let the baseband retune per-CPRI-rate without external intervention, supporting mixed-rate radio heads feeding the same baseband.
Được đề xuất
OTN/WDM Optical Transport Equipment
OTN/WDM line cards require dozens of reference clocks with different rates (100G: 161.13 MHz, 200G: 174.7 MHz, 400G: 425 MHz, and FEC references). The SI5341A-D-GM's 10 outputs and per-pin format selection let a single chip drive four QSFP-DD optics plus framer ASIC plus switch fabric in one circuit. The integer PLL provides -75 dBc spur suppression at non-integer rate plans, so even 525.148 MHz arbitrary rates keep eye diagrams clean. Configurable holdover via the on-chip NVM supports line-card redundancy switching without glitch.
Được đề xuất
Broadcast Video and Reference Distribution
Studio video routers, contribution encoders, and 12G-SDI gear require a house reference (PAL/NTSC tri-level, AES, word-clock) plus multiple 12G-SDI derived clocks. The SI5341A-D-GM supplies these from one IC and distributes them to multiple destinations simultaneously with sub-100 fs additive jitter. The fractional dividers lock non-integer relationships (e.g., 27 MHz -> 148.5 MHz) without external logic, and ClockBuilder Pro stores project-specific frequency plans for one-touch reproduction.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho SI5341A-D-GM — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | SI5341A-B-GM | SI5340A-D-GM | SI5341A-D-GMR | SI5341A-D07511-GM | SI5341A-D07228-GM | SiT95141 |
|---|---|---|---|---|---|---|---|
| Package | 64-VFQFN Exposed Pad | 64-VFQFN Exposed Pad - same | 64-VFQFN Exposed Pad - same | 64-VFQFN Exposed Pad - same | 64-VFQFN Exposed Pad - same | 64-VFQFN Exposed Pad - same | 64-VFQFN Exposed Pad - same |
| Brand | Skyworks Solutions | Skyworks Solutions - same | Skyworks Solutions - same | Skyworks Solutions - same | Skyworks Solutions - same | Skyworks Solutions - same | SiTime - different |
| Number of Outputs | 10 | 10 | 4 | 10 | 10 | 10 | 10 |
| Maximum Output Frequency | 1028 MHz | 1028 MHz | 1028 MHz | 1028 MHz | 1028 MHz | 1028 MHz | 700 MHz |
| Silicon Revision | Rev D | Rev B (older) | Rev D | Rev D | Rev D | Rev D | SiTime silicon |
| NVM Configuration | Default Si5341A plan | Default Si5341A Rev B | Default Si5340A | Same as SI5341A-D-GM | Custom factory programmed | Custom factory programmed | Custom factory programmed (SiTime) |
| Configuration Tool | ClockBuilder Pro | ClockBuilder Pro | ClockBuilder Pro | ClockBuilder Pro | ClockBuilder Pro | ClockBuilder Pro | SiTime tools |
Bảo phân biệt quan trọng
- 10 independent any-output frequencies up to 1028 MHz each (vsSI5340A-D-GM)
- 0.09 ps RMS phase jitter (12 kHz to 20 MHz) (vsSI5341A-B-GM)
- Cross-vendor pin-compatible drop-in alternative exists (vsSiT95141 (SiTime))
Ghi chú thiết kế
The 64-VFQFN exposed-pad package dissipates approximately 1 W at full load with all 10 LVDS outputs running at 1028 MHz. The exposed pad must be soldered to a continuous ground plane and the PCB thermal design should use at least 4 thermal vias (0.3 mm drill, 1 mm pitch) under the e-pad for theta-JA reduction below 28 C/W. For convection-cooled cards with <1 m/s airflow, de-rate to 8 outputs or implement a copper pour of at least 1 square inch around the e-pad. Estimated: Theta-JA = 28 C/W in a 4-layer 2 oz PCB layout.
Layout per Skyworks reference design: place the 64-VFQFN package over a continuous ground plane, keep reference inputs on a single routing layer, and place each output's 100-ohm differential termination at the receiver, not near the Si5341A. Refclk traces must match length within 5 mil across the differential pair. The exposed pad must connect to ground with 25-mil thermal via array to keep the junction below 125 C at 1 W dissipation. Use 0402 0.1 uF X7R bypass caps within 1 mm of each supply pin; add a 10 uF bulk cap on the device's main supply rail.
Do not assume all factory pre-programmed OPNs (Si5341A-Dxxxx-GM) are field-reprogrammable - many are OTP NVM and cannot be reloaded after programming. For development boards use SI5341A-D-GM (reprogrammable via I2C/SPI) and lock the design before scaling to a custom OPN. Another common pitfall is bypassing ClockBuilder Pro and writing register scripts manually; Skyworks' official tool handles the iterative frequency planning and saves silicon-specific tuning values that raw register writes miss. For JESD204B designs, ensure SYSREF phase alignment with the Si5341A's SYSREF-to-device-clock delay specification (typically <100 ps) is met, or capture windows will slip.
Thông tin tuân thủ
RoHS and REACH compliant per DigiKey and Mouser listings. AEC-Q100 not applicable for clock generator; halogen-free status not stated in the Verified Web Data and remains unconfirmed.
