SI5330B-B00205-GM - 1:4 LVDS Clock Buffer, 710 MHz | Skyworks
N.º da peça: SI5330B-B00205-GM ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $3.85 | $3,85 |
| 10 | $3.45 | $34,50 |
| 100 | $3.05 | $305,00 |
| 500 | $2.65 | $1.325,00 |
| 1.000 | $2.3 | $2.300,00 |
SI5330B-B00205-GM Visão geral
A clock buffer (also called a clock fanout buffer or zero-delay buffer) is a timing IC that replicates a single reference clock into multiple phase-aligned copies while preserving edge fidelity. In the broader system hierarchy, a clock buffer sits between an upstream clock source (crystal oscillator, PLL, or synthesizer) and downstream loads such as FPGAs, ASICs, SerDes PHYs, ADC/DAC sampling clocks, and network processors. Because each additional output branch adds jitter and skew, choosing a low-additive-jitter, low-skew buffer is critical for multi-lane high-speed serial links and parallel data converters.
The Si5330B features a glitchless switching mux that makes it ideal for redundant clocking applications such as telecom line cards, where the system must switch between primary and backup references without generating runt pulses or phase discontinuities. The device leverages advanced CMOS technology to fan out four clocks from 5 MHz to 710 MHz with guaranteed low additive jitter and low propagation-delay variability across temperature and supply. According to the Skyworks Si5330 datasheet, the Si5330B family is offered in multiple output-format configurations (LVDS, LVPECL, HCSL, CMOS) and divider options, with each part number suffix encoding the output type, divider ratio, and output enable polarity.
Typical applications include redundant Ethernet switch synchronization, server and storage backplane clock distribution, PCIe and SATA reference clock fanout, wireless base-station signal-chain clocking, and high-speed ADC/DAC sampling-clock distribution. The integrated level translation eliminates the need for external resistor networks or discrete translator ICs when converting between LVDS, LVPECL, HCSL, and CMOS domains.
When designing with this part, route all differential pairs with controlled 100-ohm impedance, keep output traces short and matched, and tie the exposed pad to a solid ground plane for thermal dissipation. Decouple each supply pin with a 0.1 uF ceramic capacitor placed as close to the IC as possible, with an additional 1 uF bulk capacitor on the VDD node.
This page synthesizes distributor pricing, drop-in alternatives within the Skyworks Si5330 family, and practical design notes not found in the standalone datasheet extract.
Alternativas drop-in para SI5330B-B00205-GM — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com SI5330B-B00205-GM (mesmo formato e footprint) — diferindo em Number of Outputs, Package.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
SI53301-B-GM
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
SI5338B-B-GM
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
SI5330A-B00202-GMR
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
SI5330B-B00206-GM
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
SI5330B-B00204-GM
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
SI5330B-B00205-GM Especificações
| Função | Clock Fanout Buffer (Distribution), Translator |
| Number of Inputs | 1 |
| Número de saídas | 4 (differential) / 8 (single-ended) |
| Maximum Output Frequency | 710 MHz |
| Minimum Output Frequency | 5 MHz |
| Supply Voltage Range | 1.71 V to 3.46 V (1.8 V / 2.5 V / 3.3 V rails) |
| Input Signal Type | Single-ended or differential |
| Output Signal Type | LVPECL, LVDS, HCSL (differential); CMOS, SSTL, HSTL (single-ended) |
| Encapsulamento | 24-pin QFN (4x4 mm) with exposed pad |
| Tipo de montagem | Surface Mount |
| Temperatura de operação | -40 C to +85 C |
| Glitchless Mux | Yes (for redundant clock switching) |
| Status RoHS | Compliant |
Configuração de pinos do SI5330B-B00205-GM
| Pino 1 | VDD — Positive supply (1.8/2.5/3.3 V) |
| Pino 2 | GND — Ground |
| Pino 3 | CLK_IN+ — Differential clock input (positive) |
| Pino 4 | CLK_IN- — Differential clock input (negative) |
| Pino 5 | OE — Output enable (per datasheet ordering suffix) |
| Pino 6 | VDD — Positive supply |
| Pino 7 | GND — Ground |
| Pino 8 | Q0+ — Differential output 0 positive (LVDS) |
| Pino 9 | Q0- — Differential output 0 negative (LVDS) |
| Pino 10 | VDD — Positive supply |
| Pino 11 | GND — Ground |
| Pino 12 | Q1+ — Differential output 1 positive (LVDS) |
| Pino 13 | Q1- — Differential output 1 negative (LVDS) |
| Pino 14 | VDD — Positive supply |
| Pino 15 | GND — Ground |
| Pino 16 | Q2+ — Differential output 2 positive (LVDS) |
| Pino 17 | Q2- — Differential output 2 negative (LVDS) |
| Pino 18 | VDD — Positive supply |
| Pino 19 | GND — Ground |
| Pino 20 | Q3+ — Differential output 3 positive (LVDS) |
| Pino 21 | Q3- — Differential output 3 negative (LVDS) |
| Pino 22 | VDD — Positive supply |
| Pino 23 | GND — Ground |
| Pino 24 | SEL — Mux select (per ordering suffix) |
| Pino EP | EP — Exposed thermal pad - tie to ground plane |
Aplicações típicas
SI5330B-B00205-GM é adequado para 6 aplicaçãos: Redundant Ethernet Switch Clock Distribution, Server and Storage Backplane Clocking, Wireless Base Station Signal Chain Clocking, Test and Measurement Instrumentation, FPGA and ASIC Multi-Lane Clock Fanout, Industrial Automation and Motor Control.
Redundant Ethernet Switch Clock Distribution
The SI5330B-B00205-GM's integrated glitchless switching mux makes it ideal for redundant clocking in managed Ethernet switches and telecom line cards, where hitless failover between primary and backup reference clocks is mandatory to avoid packet loss. Its 5 MHz to 710 MHz output range covers all common Ethernet PHY reference rates (25 MHz, 125 MHz, 156.25 MHz, 312.5 MHz) while the LVDS output standard minimizes EMI on backplane traces. Placed downstream of the system PLL or TCXO, it distributes four phase-aligned copies to PHYs and switch ASICs. Unlike a discrete mux plus buffer, the integrated glitchless mux eliminates runt-pulse risk during reference switchover - critical for IEEE 1588 timing and SyncE applications.
Recomendado
Server and Storage Backplane Clocking
The SI5330B-B00205-GM is well suited to distribute a 100 MHz or 125 MHz reference clock across server motherboards and storage backplanes, where one oscillator must fan out to multiple PCIe lanes, SATA ports, and SAS expanders. Its 710 MHz ceiling comfortably covers PCIe Gen 4 reference rates with substantial margin. Placed near the main oscillator, it provides four differential LVDS copies with controlled skew and low additive jitter, eliminating the need for a second-stage synthesizer. The -40 C to +85 C industrial temperature range supports storage and hyperscale data-center deployments where inlet air temperatures are elevated.
Recomendado
Wireless Base Station Signal Chain Clocking
In LTE and 5G base stations, the SI5330B-B00205-GM can fan out a low-jitter reference clock from the system TCXO or OCXO to multiple ADC and DAC sample clocks, SerDes PHYs, and baseband processors. Its LVDS output standard and 710 MHz capability cover JESD204B subclass-1 reference rates used by modern RF data converters. Placed between the system clock distribution PLL and the RF ADC/DAC cards, it provides four phase-aligned copies with low additive jitter, preserving the phase-noise floor of the upstream reference. The industrial temperature range and wide supply tolerance suit outdoor RRH and small-cell deployments.
Recomendado
Test and Measurement Instrumentation
The SI5330B-B00205-GM's combination of 710 MHz bandwidth, low additive jitter, and LVDS output standard makes it a strong fit for clock distribution inside high-end oscilloscopes, signal generators, and protocol analyzers, where a single ultra-low-noise master reference must reach multiple ADC sampling clock inputs. Its glitchless mux supports primary/backup TCXO/OCXO switchover for instrument calibration uptime. Placed on the timing backbone of the instrument, it delivers four matched copies with sub-ps skew, preserving the SNR of the downstream ADC. The 24-pin QFN 4x4 mm footprint suits dense instrument mainboards.
Recomendado
FPGA and ASIC Multi-Lane Clock Fanout
FPGAs and ASICs with multi-gigabit transceivers (SerDes) require multiple matched reference clocks for PCIe, Ethernet, and serial RapidIO links - the SI5330B-B00205-GM provides four low-jitter LVDS copies from one source, eliminating the need to route multiple crystals. Its 710 MHz ceiling covers most SerDes reference rates including 156.25 MHz (10G Ethernet), 312.5 MHz (100G Ethernet), and 100 MHz (PCIe Gen 4). Placed near the FPGA, it distributes phase-aligned clocks to dedicated clock-input pins with controlled impedance differential traces. The exposed pad aids thermal dissipation at 710 MHz continuous operation.
Recomendado
Industrial Automation and Motor Control
In factory-automation PLCs and high-end motor drives, the SI5330B-B00205-GM distributes a deterministic reference clock to multiple digital signal controllers, gate drivers, and encoder interfaces where jitter directly impacts control-loop bandwidth and torque ripple. Its -40 C to +85 C industrial temperature range and 24-pin QFN footprint suit ruggedized DIN-rail and panel-mount designs. Placed between the system oscillator and the DSP/MCU cluster, it delivers four LVDS copies with consistent phase relationship. Unlike a single high-current oscillator, the SI5330B isolates each load electrically and reduces PCB routing congestion.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para SI5330B-B00205-GM — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | SI53301-B-GM | SI5338B-B-GM | SI5330A-B00202-GMR | SI5330B-B00206-GM | SI5330B-B00204-GM |
|---|---|---|---|---|---|---|
| Brand | Skyworks Solutions | Skyworks Solutions | Skyworks Solutions | Skyworks Solutions | Skyworks Solutions | Skyworks Solutions |
| Package | 24-pin QFN (4x4 mm) | 24-pin QFN (4x4 mm) - same | 24-pin QFN (4x4 mm) - same | 24-pin QFN (4x4 mm) - same | 24-pin QFN (4x4 mm) - same | 24-pin QFN (4x4 mm) - same |
| Topology | 1:4 fanout + glitchless mux | 1:4 fanout + glitchless mux (same family) | 1:4 fanout + integrated PLL | 1:4 fanout + glitchless mux | 1:4 fanout + glitchless mux | 1:4 fanout + glitchless mux |
| Output Standard | LVDS | LVDS | LVDS | LVPECL (different) | LVDS | LVDS |
| Maximum Output Frequency | 710 MHz | 710 MHz | 710 MHz | 710 MHz | 710 MHz | 710 MHz |
| Supply Voltage | 1.8 / 2.5 / 3.3 V | 1.8 / 2.5 / 3.3 V | 1.8 / 2.5 / 3.3 V | 1.8 / 2.5 / 3.3 V | 1.8 / 2.5 / 3.3 V | 1.8 / 2.5 / 3.3 V |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
| RoHS Compliance | Yes | Yes | Yes | Yes | Yes | Yes |
Principais diferenciais
- Integrated glitchless switching mux for redundant clocking (vs Discrete mux + separate buffer topology)
- Skyworks CMOS technology optimized for 5-710 MHz low-jitter fanout (vs Si5338B-B-GM (higher-port-count variant))
- Wide 1.8/2.5/3.3 V supply flexibility without external level shifters (vs Fixed single-supply competitor buffers)
Notas de projeto
Route all four differential clock output pairs and the input pair as 100-ohm differential impedance traces on the top signal layer over a continuous ground plane. Keep output trace lengths matched within 5 mm to minimize output-to-output skew beyond the silicon's intrinsic mismatch. Place 0.1 uF ceramic decoupling capacitors within 2 mm of every VDD pin, with an additional 1 uF bulk capacitor on the main VDD node. The exposed pad (EP) must be soldered to the ground plane through multiple thermal vias to achieve the datasheet's rated thermal performance.
When interfacing the LVDS outputs to a downstream LVDS receiver, place the 100-ohm termination resistor as close to the receiver input as possible to avoid reflections on the high-speed differential pair. For LVPECL or HCSL receivers, refer to the Si5330 datasheet application section for the correct DC-biasing termination network. Do not leave unused outputs floating - terminate them with a 100-ohm differential resistor near the IC to prevent radiated emissions from unterminated 710 MHz edges.
Do not assume any 24-pin QFN Si5330B orderable part number is a drop-in replacement for the SI5330B-B00205-GM - the trailing suffix digits encode the output standard (LVDS vs LVPECL vs HCSL vs CMOS), divider ratio, and OE polarity. Always cross-check the Si5330 datasheet ordering table before substituting a different suffix. Mixing LVDS and LVPECL outputs on the same board will damage downstream receivers and fail compliance testing. The Skyworks Si5330 family is fixed-configuration; for dynamically reconfigurable outputs, step up to the Si5338B series.
Estimated: at 3.3 V supply, 710 MHz continuous operation into 100-ohm LVDS loads, the SI5330B-B00205-GM dissipates approximately 250-300 mW. The 24-pin QFN package with exposed pad has a typical theta_JA around 35 C/W on a 4-layer JEDEC test board, resulting in a junction-to-ambient temperature rise of approximately 10 C above ambient. For continuous operation near +85 C ambient, ensure adequate airflow or copper pour area under the exposed pad to maintain junction temperature within the 125 C absolute maximum rating.
Informações de conformidade
RoHS and lead-free per Skyworks product page. Not AEC-Q100 qualified - commercial/industrial grade only. MSL level not specified in the verified data extract - refer to the Si5330 datasheet Section 6 (Handling and Soldering) for reflow profile and MSL classification.
