SI5332A-C-GM1 - 6-Output Any-Frequency Clock Generator, 333.33 MHz | Skyworks
MPN: SI5332A-C-GM1 ✗ Cuối đờiSI5332A-C-GM1 Tóm tắt
What is an any-frequency clock generator? It is a PLL-based timing IC that can produce multiple output frequencies from a single reference, replacing multiple crystal oscillators and fixed-frequency PLLs. Within the broader silicon timing hierarchy, any-frequency clock generators sit above fixed-frequency XO/VCXO parts and below full-blown network synchronizers; they are a sub-category of clock generators within the clock-and-timing IC family.
Key features include a differential output frequency range of 5 MHz to 333.33 MHz, integrated MultiSynth fractional dividers alongside high-speed integer dividers, RMS phase jitter performance as low as 190 fs (12 kHz to 20 MHz), dual spread-spectrum capability for EMI reduction, and up to 5 user-defined hardware input pins that can be assigned as output enable, frequency control, spread-spectrum enable, or input-reference selection. Free-run operation is supported via an external crystal or optional internal crystal, with PLL lock to an external reference clock as an alternative.
The MultiSynth architecture is the core technical innovation: each output bank uses a fractional-N divider that allows arbitrary non-integer frequency ratios without the integer-boundary spurs common to traditional PLLs. Combined with the high-PSRR internal regulators and low-dropout core, this yields deterministic jitter performance that is largely independent of the chosen output frequency, simplifying timing-budget analysis across multi-rate designs.
Typical applications include switch and router line-card clocks, server and storage timing, FPGA fabric and transceiver reference clocks, industrial Ethernet switches, and broadcast video. The wide output range covers common telecom rates (156.25 MHz, 161.13 MHz, 312.5 MHz), PCIe, Ethernet, and SDI video clocks from a single device.
When designing with this part, follow the Si5332 Reference Manual PCB-layout recommendations to achieve the rated jitter performance - especially short, symmetric differential traces and a clean ground reference under the exposed pad. Decoupling should follow the datasheet's reference schematic exactly.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers a faster path to a working BOM.
Bộ thay thế dễ dàng lắp đặt cho SI5332A-C-GM1 — 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 SI5332A-C-GM1 (cùng hình factor và footprint) — khác nhau ở Divider Architecture, Function, Operating Temperature Range, Package, Supply Voltage.
SI5332A-D-GM1
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →SI5332A-C-GM1R
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
SI5332A-B-GM1
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
SI5332A-C-GM1 Thông số kỹ thuật
| Chức năng | Clock Generator |
| Series | MultiSynth |
| Số lượng đầu ra | 6 |
| Output Frequency Range | 5 MHz to 333.33 MHz |
| Input Frequency Range (Differential) | 10 MHz to 250 MHz |
| RMS Phase Jitter (12 kHz to 20 MHz) | 190 fs (typical) |
| Output Logic | CML, HCSL, LVCMOS, LVDS, LVPECL (multi-format) |
| Divider Architecture | MultiSynth fractional + integer |
| Điện áp cung cấp | 1.8 V / 2.5 V / 3.3 V core; separate output supply |
| Khoảng nhiệt độ hoạt động | -40 C to +85 C (industrial) |
| Hộp | 32-VFQFN Exposed Pad (5 x 5 mm) |
| Kiểu lắp đặt | Surface Mount |
| Spread Spectrum | Dual spread spectrum support |
| Hardware Input Pins | Up to 5 user-defined (OE, frequency select, SS enable, ref select) |
| Trạng thái RoHS | Compliant |
Cấu hình chân SI5332A-C-GM1
| Chân 1 | XA / FIN1 — Crystal input or external reference 1 |
| Chân 2 | XB / FIN2 — Crystal input or external reference 2 |
| Chân 3 | VDD_DIG — Digital core supply (1.8 V) |
| Chân 4 | GND_DIG — Digital core ground |
| Chân 5 | SDA — I2C serial data (configuration) |
| Chân 6 | SCL — I2C serial clock (configuration) |
| Chân 7 | VDD_IO — I/O supply (2.5 V or 3.3 V) |
| Chân 8 | IN0 — Multi-function input pin 0 (OE / FSEL / SS_EN / REFSEL) |
| Chân 9 | IN1 — Multi-function input pin 1 (OE / FSEL / SS_EN / REFSEL) |
| Chân 10 | IN2 — Multi-function input pin 2 (OE / FSEL / SS_EN / REFSEL) |
| Chân 11 | IN3 — Multi-function input pin 3 (OE / FSEL / SS_EN / REFSEL) |
| Chân 12 | IN4 — Multi-function input pin 4 (OE / FSEL / SS_EN / REFSEL) |
| Chân 13 | VDD_CORE — Core PLL supply (1.8 V) |
| Chân 14 | GND_CORE — Core PLL ground |
| Chân 15 | OUT0_N — Differential output 0 negative (multi-format) |
| Chân 16 | OUT0_P — Differential output 0 positive (multi-format) |
| Chân 17 | VDDO0 — Output 0 driver supply (1.8/2.5/3.3 V) |
| Chân 18 | OUT1_N — Differential output 1 negative |
| Chân 19 | OUT1_P — Differential output 1 positive |
| Chân 20 | VDDO1 — Output 1 driver supply |
| Chân 21 | OUT2_N — Differential output 2 negative |
| Chân 22 | OUT2_P — Differential output 2 positive |
| Chân 23 | VDDO2 — Output 2 driver supply |
| Chân 24 | OUT3_N — Differential output 3 negative |
| Chân 25 | OUT3_P — Differential output 3 positive |
| Chân 26 | VDDO3 — Output 3 driver supply |
| Chân 27 | OUT4_N — Differential output 4 negative |
| Chân 28 | OUT4_P — Differential output 4 positive |
| Chân 29 | VDDO4 — Output 4 driver supply |
| Chân 30 | OUT5_N — Differential output 5 negative |
| Chân 31 | OUT5_P — Differential output 5 positive |
| Chân 32 | VDDO5 — Output 5 driver supply |
| Chân 33 | EPAD — Exposed thermal pad - solder to continuous ground plane |
Ứng dụng tiêu biểu
SI5332A-C-GM1 phù hợp cho 6 Áp dụngs: 10/25/40/100G Ethernet Switch and Router Line Cards, FPGA Transceiver and Fabric Reference Clocks, Industrial Ethernet Switches and Fieldbus Timing, Server and Storage System Timing, Broadcast Video and SDI Timing, Telecom Baseband and Wireless Infrastructure.
10/25/40/100G Ethernet Switch and Router Line Cards
The SI5332A-C-GM1 is purpose-built for data-center Ethernet timing, where a single line card often needs a 156.25 MHz reference for the PHY, 161.13 MHz for the MAC/serializer, and 25 MHz for the management plane. With 190 fs RMS jitter and 6 independently programmable outputs in one 32-VFQFN device, the part replaces 3-4 separate XO/PLL ICs. Multi-format output drivers (CML, HCSL, LVPECL) connect directly to the most common PHY reference-clock inputs without level translators.
Được đề xuất
FPGA Transceiver and Fabric Reference Clocks
FPGAs typically need separate reference clocks for the transceiver (multi-GHz SerDes) and the fabric logic (100-300 MHz). The SI5332A-C-GM1 supplies both from one part: outputs 1-2 can drive transceiver reference pins via CML/LVPECL, while outputs 3-6 provide fabric clocks at LVCMOS logic levels. The MultiSynth fractional divider produces exact non-integer rates such as 161.1328125 MHz that integer PLLs cannot generate without frequency errors, simplifying FPGA transceiver-link training.
Được đề xuất
Industrial Ethernet Switches and Fieldbus Timing
Industrial Ethernet protocols (PROFINET, EtherCAT, EtherNet/IP) and fieldbus standards require deterministic clocks with low jitter for synchronization to IEEE 1588 grandmasters. The SI5332A-C-GM1's -40 C to +85 C industrial temperature range and spread-spectrum option meet EMI compliance under EN 55022 Class B. A typical design uses one output at 50 MHz for the MAC, one at 25 MHz for the PHY reference, and one LVCMOS at 8 MHz for the microcontroller subsystem, all from a single IC.
Được đề xuất
Server and Storage System Timing
Servers and RAID storage controllers require multiple clock domains: PCIe Gen4/5 reference (100 MHz HCSL), SAS expander clocks, BMC clocks, and memory subsystem timing. The SI5332A-C-GM1 supports HCSL output format natively for PCIe, while LVDS outputs drive memory buffers and LVCMOS outputs run the BMC microcontroller. Its 1.8/2.5/3.3 V flexible supplies integrate into standard server power rails without extra LDO regulators.
Được đề xuất
Broadcast Video and SDI Timing
SDI video standards (SD-SDI, HD-SDI, 3G-SDI, 6G/12G-SDI) require fixed reference clocks at 27 MHz, 74.25 MHz, 148.5 MHz, and 297 MHz with very low jitter to preserve eye-mask compliance. The SI5332A-C-GM1's fractional divider accuracy produces these exact rates with 0 ppm error, and the low RMS jitter ensures downstream PHYs pass SMPTE conformance tests. Multiple video output formats can be supported from a single timing IC.
Được đề xuất
Telecom Baseband and Wireless Infrastructure
Telecom baseband cards need JESD204B/C subclass-1 clocks with deterministic latency and sub-ps jitter. The SI5332A-C-GM1 drives JESD204B converters directly with its low-jitter outputs, and the SYSREF output enables subclass-1 deterministic latency for ADCs and DACs in radio units. Its frequency flexibility means one part can serve both the baseband clock tree (122.88 MHz, 153.6 MHz) and the fronthaul Ethernet clock (156.25 MHz) without board rework.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho SI5332A-C-GM1 — 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 | SI5332A-D-GM1 | SI5332A-C-GM1R | SI5332A-B-GM1 |
|---|---|---|---|---|
| Package | 32-VFQFN Exposed Pad (5 x 5 mm) | 32-VFQFN Exposed Pad (5 x 5 mm) - same | 32-VFQFN Exposed Pad (5 x 5 mm) - same | 32-VFQFN Exposed Pad (5 x 5 mm) - same |
| Brand | Skyworks Solutions | Skyworks Solutions - same | Skyworks Solutions - same | Skyworks Solutions - same |
| Number of Outputs | 6 | 6 | 6 | 8 |
| Max Output Frequency | 312.5 MHz | 333.33 MHz | 312.5 MHz | 333.33 MHz |
| RMS Jitter (12 kHz-20 MHz) | 190 fs | 190 fs | 190 fs | 190 fs |
| Divider Architecture | MultiSynth fractional + integer | MultiSynth fractional + integer | MultiSynth fractional + integer | MultiSynth fractional + integer |
| Pinout Compatibility | Reference pinout | Identical pinout in 5-312.5 MHz range | Identical pinout | Pins 21-28 differ (8 vs 6 outputs) |
| Lifecycle Status | Obsolete | Active (or NRND) | Obsolete (tape-and-reel variant of obsolete die) | Active |
| 1 kty Approx. Price (USD) | 12.50 | 13.20 | 12.80 | 16.40 |
Bảo phân biệt quan trọng
- Multi-format output drivers eliminate external level translators (vsFixed-format clock generators (e.g., SI5351 family))
- MultiSynth fractional divider enables true any-frequency synthesis (vsInteger-N PLL clock generators)
- Lowest jitter in its output-count class (vsGeneric 6-output PLLs at similar cost)
Ghi chú thiết kế
Follow the Si5332 Reference Manual PCB layout section exactly: the exposed thermal pad (pin 33) must be soldered to a continuous ground plane stitched with vias on a 1 mm grid. Differential output traces must be length-matched to within 2.5 mm to preserve the datasheet's jitter specification; place 100 nF X7R 0402 decoupling caps within 1 mm of each VDDO/VDD pin. The reference manual notes that deviating from these guidelines can degrade jitter by 2-3x, which can fail IEEE 802.3 25G transmitter masks.
Keep the XA/XB crystal traces short (less than 5 mm) and surround them with a ground pour; any noise coupling onto these traces appears directly as output jitter. If using an external reference clock instead of a crystal, route the reference on a 50-ohm controlled-impedance trace with a 50-ohm termination at the XA pin. Skyworks' ClockBuilder Pro tool exports the exact stack-up and routing recommendations for any given Si5332 variant.
A common mistake is treating the SI5332A-C-GM1 as fully drop-in compatible with the SI5332A-D-GM1 at all frequencies: above 312.5 MHz the -C variant cannot lock because the VCO/divider chain is programmed for the lower ceiling. Always check your highest required output frequency before substituting. Another common error is configuring output format (CML vs HCSL vs LVDS) via software but forgetting to bias the unused differential pin - this causes EMI and reduces output amplitude; the ClockBuilder Pro schematic generator flags this and inserts the correct bias network automatically.
Thông tin tuân thủ
RoHS and REACH compliance per Skyworks Si5332 product page. Not AEC-Q100 qualified (industrial temp range -40 to +85 C only); conflict-minerals compliance statement published by Skyworks/Silicon Labs. Halogen-free status was not stated in the verified web data and is set to unknown.
