SI5332A-C-GM1 - 6-Output Any-Frequency Clock Generator, 333.33 MHz | Skyworks
MPN: SI5332A-C-GM1 ✗ پایان تولیدSI5332A-C-GM1 نمای کلی
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.
جایگزین‌های drop-in برای SI5332A-C-GM1 — همان پکیج، سازگار پین‌به‌پین. قطعات با پکیج متفاوت که نیاز به تغییر PCB دارند مستثنی هستند.
گونه‌ها در این سری
مدل‌های هم‌سری که جایگزین مستقیم هستند برای SI5332A-C-GM1 (همان فرم‌فاکتور و فوت‌پرینت) — متفاوت در Divider Architecture, Function, Operating Temperature Range, Package, Supply Voltage.
SI5332A-D-GM1
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←SI5332A-C-GM1R
✅ جایگزین مستقیم ⚠️ مشخصات تأییدنشده📋 جایگزین مرجع (خارج از کاتالوگ)
SI5332A-B-GM1
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
SI5332A-C-GM1 مشخصات
| عملکرد | Clock Generator |
| Series | MultiSynth |
| تعداد خروجی‌ها | 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 |
| ولتاژ تغذیه | 1.8 V / 2.5 V / 3.3 V core; separate output supply |
| محدوده دمای کاری | -40 C to +85 C (industrial) |
| بسته‌بندی | 32-VFQFN Exposed Pad (5 x 5 mm) |
| نوع نصب | Surface Mount |
| Spread Spectrum | Dual spread spectrum support |
| Hardware Input Pins | Up to 5 user-defined (OE, frequency select, SS enable, ref select) |
| وضعیت RoHS | Compliant |
پیکربندی پین SI5332A-C-GM1
| پین 1 | XA / FIN1 — Crystal input or external reference 1 |
| پین 2 | XB / FIN2 — Crystal input or external reference 2 |
| پین 3 | VDD_DIG — Digital core supply (1.8 V) |
| پین 4 | GND_DIG — Digital core ground |
| پین 5 | SDA — I2C serial data (configuration) |
| پین 6 | SCL — I2C serial clock (configuration) |
| پین 7 | VDD_IO — I/O supply (2.5 V or 3.3 V) |
| پین 8 | IN0 — Multi-function input pin 0 (OE / FSEL / SS_EN / REFSEL) |
| پین 9 | IN1 — Multi-function input pin 1 (OE / FSEL / SS_EN / REFSEL) |
| پین 10 | IN2 — Multi-function input pin 2 (OE / FSEL / SS_EN / REFSEL) |
| پین 11 | IN3 — Multi-function input pin 3 (OE / FSEL / SS_EN / REFSEL) |
| پین 12 | IN4 — Multi-function input pin 4 (OE / FSEL / SS_EN / REFSEL) |
| پین 13 | VDD_CORE — Core PLL supply (1.8 V) |
| پین 14 | GND_CORE — Core PLL ground |
| پین 15 | OUT0_N — Differential output 0 negative (multi-format) |
| پین 16 | OUT0_P — Differential output 0 positive (multi-format) |
| پین 17 | VDDO0 — Output 0 driver supply (1.8/2.5/3.3 V) |
| پین 18 | OUT1_N — Differential output 1 negative |
| پین 19 | OUT1_P — Differential output 1 positive |
| پین 20 | VDDO1 — Output 1 driver supply |
| پین 21 | OUT2_N — Differential output 2 negative |
| پین 22 | OUT2_P — Differential output 2 positive |
| پین 23 | VDDO2 — Output 2 driver supply |
| پین 24 | OUT3_N — Differential output 3 negative |
| پین 25 | OUT3_P — Differential output 3 positive |
| پین 26 | VDDO3 — Output 3 driver supply |
| پین 27 | OUT4_N — Differential output 4 negative |
| پین 28 | OUT4_P — Differential output 4 positive |
| پین 29 | VDDO4 — Output 4 driver supply |
| پین 30 | OUT5_N — Differential output 5 negative |
| پین 31 | OUT5_P — Differential output 5 positive |
| پین 32 | VDDO5 — Output 5 driver supply |
| پین 33 | EPAD — Exposed thermal pad - solder to continuous ground plane |
کاربردهای معمول
SI5332A-C-GM1 مناسب است برای 6 کاربردs: 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.
پیشنهادی
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.
پیشنهادی
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.
پیشنهادی
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.
پیشنهادی
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.
پیشنهادی
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.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای SI5332A-C-GM1 — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول | 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 |
تفاوت‌های کلیدی
- Multi-format output drivers eliminate external level translators (در مقابلFixed-format clock generators (e.g., SI5351 family))
- MultiSynth fractional divider enables true any-frequency synthesis (در مقابلInteger-N PLL clock generators)
- Lowest jitter in its output-count class (در مقابلGeneric 6-output PLLs at similar cost)
یادداشت‌های طراحی
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.
اطلاعات انطباق
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.
