553SDCGI - 1:4 LVCMOS Clock Buffer 200MHz 8-SOIC | Renesas
N.º de pieza: 553SDCGI ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $4.2 | $4,20 |
| 10 | $3.78 | $37,80 |
| 100 | $3.36 | $336,00 |
| 500 | $2.95 | $1.475,00 |
| 1.000 | $2.55 | $2.550,00 |
553SDCGI Descripción general
A clock buffer (also called a clock fanout buffer or clock distribution IC) is a type of timing IC that replicates one input clock signal across multiple outputs with minimal added jitter and controlled skew. Within the broader timing hierarchy, clock buffers sit between clock generators (oscillators, PLLs, crystal units) and clock-consuming loads (processors, FPGAs, ASICs, serializers). The 553S family targets applications where PCB trace lengths, fanout requirements, or isolation needs make direct point-to-point clock distribution impractical.
Key features of the 553SDCGI include sub-50 fs additive phase jitter (12 kHz to 20 MHz integration band), 1:4 fanout with matched output-to-output skew, LVCMOS-compatible outputs, and a low additive jitter profile that preserves source-clock integrity. The device also integrates an output enable function for power-saving modes and supports industrial temperature operation. Compared with multi-PLL clock trees, the 553S delivers cleaner, more deterministic signal distribution.
The 553S architecture uses a low-jitter input receiver followed by a matched-output driver tree, ensuring that all four outputs remain tightly aligned in both frequency and phase. This topology makes the part especially attractive for distributing reference clocks to multiple ADCs, DACs, FPGA transceivers, or SERDES channels where inter-channel timing mismatch would degrade system performance.
Typical applications include Ethernet switches and routers, telecom base stations, PCIe and SAS reference-clock fanout, FPGA/ASIC clock distribution, test and measurement instrumentation, and storage area networks. The 50 fs additive jitter specification is particularly valuable for high-speed serial links where the recovered clock's eye margin is sensitive to phase noise.
When designing with the 553SDCGI, place a 0.01 uF decoupling capacitor directly between VDD (pin 1) and GND (pin 4) to minimize supply-induced jitter. Use 33 ohm series-termination resistors on outputs when the trace length exceeds 1 inch to control reflections and preserve signal integrity at 200 MHz edges.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, providing a single reference for engineers evaluating the 553SDCGI for new designs or replacement of legacy clock distribution circuits.
Alternativas directas para 553SDCGI — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con 553SDCGI (mismo factor de forma y huella) — difiere en Function, Operating Temperature Range, Package.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
553SCMGI8
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$0.96 / unidad
Ver hoja de datos →553SDCGI Especificaciones
| Función | Clock Fanout Buffer (Distribution) IC |
| Number of Circuits | 1 |
| Ratio - Input:Output | 1:4 |
| Maximum Frequency | 200 MHz |
| Output Logic Type | LVCMOS |
| Additive Phase Jitter | < 50 fs (typ) |
| Supply Voltage Range | 2.375 V to 3.465 V |
| Output Skew | Low skew (matched outputs) |
| Rango de temperatura de funcionamiento | -40 C to +85 C (industrial) |
| Encapsulado | 8-pin SOIC (3.90 mm width) |
| Tipo de montaje | Surface Mount |
| Estado RoHS | Compliant |
| Lead-Free | Yes |
| Input Type | LVCMOS |
Configuración de pines de 553SDCGI
| Pin 1 | VDD — Power supply input (2.375 V to 3.465 V) |
| Pin 2 | CLK_IN — LVCMOS clock input |
| Pin 3 | OE — Output enable (active-high; see datasheet for variant specifics) |
| Pin 4 | GND — Ground |
| Pin 5 | Q0 — LVCMOS clock output 0 |
| Pin 6 | Q1 — LVCMOS clock output 1 |
| Pin 7 | Q2 — LVCMOS clock output 2 |
| Pin 8 | Q3 — LVCMOS clock output 3 |
Aplicaciones típicas
553SDCGI es adecuado para 6 aplicacións: Ethernet Switch and Router Clock Distribution, FPGA and ASIC Reference Clock Fanout, Telecom Base Station Timing Distribution, Test and Measurement Instrumentation, Storage Area Network (SAN) and SATA/SAS Clock Distribution, Industrial Automation and Motion Control.
Ethernet Switch and Router Clock Distribution
The 553SDCGI is ideal for distributing a 25 MHz, 100 MHz, 125 MHz, or 156.25 MHz reference clock across four Ethernet PHY or switch ASIC ports. Its sub-50 fs additive phase jitter preserves the eye margin on 1G/10G serial links where recovered-clock timing is sensitive to phase noise. The SOIC-8 package and 3.3 V supply align with typical switch-PCB rails. Engineers typically place the 553SDCGI between the main oscillator and the four downstream PHY devices, with 33 ohm series terminations on traces longer than 1 inch to control reflections at the 100 MHz edge rate.
Recomendado
FPGA and ASIC Reference Clock Fanout
The 553SDCGI provides a clean 1:4 fanout of the board-level reference clock to multi-bank FPGAs or ASIC SERDES channels. Its sub-50 fs jitter floor maintains the high-speed serial-link jitter budget, and the SOIC-8 footprint fits easily next to the FPGA clock input pins. With a 200 MHz ceiling, the part supports most common FPGA reference frequencies including 100 MHz, 125 MHz, 148.5 MHz, and 156.25 MHz. The 553S datasheet recommends matching trace lengths to within 50 mils across the four outputs to keep output-to-output skew low for multi-channel SERDES alignment.
Recomendado
Telecom Base Station Timing Distribution
Telecom baseband cards rely on a single GPS-disciplined OCXO or TCXO reference distributed to multiple radio channels. The 553SDCGI's sub-50 fs additive jitter means it does not measurably degrade the phase noise of the disciplined reference, while its 1:4 fanout serves four radio paths from one source. The industrial -40 C to +85 C temperature range covers outdoor-mounted small-cell hardware. Pair the 553SDCGI with a downstream PLL synthesizer when fractional-N frequency multiplication is needed per channel; the buffer alone is sufficient when all four radios share the same reference frequency.
Recomendado
Test and Measurement Instrumentation
Test equipment such as oscilloscopes, signal analyzers, and data-acquisition front ends require multiple ADC/DAC channels to be clocked from a single low-jitter reference. The 553SDCGI delivers that reference to four sample-clock inputs with sub-50 fs additive jitter and matched output-to-output skew, preserving the inter-channel phase alignment critical for I/Q demodulation and time-interleaved ADCs. Its SOIC-8 footprint is easy to place near the analog front end, and the 2.5 V / 3.3 V supply options simplify integration with legacy analog designs and modern FPGAs.
Recomendado
Storage Area Network (SAN) and SATA/SAS Clock Distribution
SATA and SAS host-bus adapters fan a 75 MHz, 100 MHz, or 150 MHz reference clock to multiple disk ports. The 553SDCGI handles this 1:4 distribution while keeping additive jitter well below the SATA Gen 3 and SAS-3 compliance budgets. Its matched outputs ensure all attached drives receive the reference with negligible skew, simplifying PHY training at link initialization. The compact SOIC-8 footprint and 3.3 V operation suit dense storage backplanes where board area is at a premium.
Recomendado
Industrial Automation and Motion Control
Industrial motion controllers distribute a precision reference clock to multiple motor-driver boards, encoder interfaces, and fieldbus PHYs. The 553SDCGI's industrial -40 C to +85 C rating and 200 MHz bandwidth suit EtherCAT, SERCOS III, and PROFINET reference-clock distribution. Its sub-50 fs additive jitter preserves deterministic cycle times for synchronized multi-axis motion, and the 1:4 fanout can serve an entire sub-rack from one master oscillator. Place the buffer close to the master oscillator output, with the 0.01 uF decoupling capacitor straddling pins 1 and 4 to minimize supply-induced jitter.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para 553SDCGI — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | 553SCMGI8 | CDCLVC1104PWR |
|---|---|---|---|
| Package | 8-SOIC (3.90 mm) | 8-SOIC (3.90 mm) - same | 8-TSSOP (3.00 mm) - different footprint |
| Brand | Renesas Electronics | Renesas Electronics | Texas Instruments |
| Fanout Ratio | 1:4 | 1:4 | 1:4 |
| Maximum Frequency | 200 MHz | 200 MHz | 200 MHz |
| Additive Phase Jitter | < 50 fs | < 50 fs | < 100 fs (typical) |
| Supply Voltage Range | 2.375 V to 3.465 V | 2.375 V to 3.465 V | 2.375 V to 3.465 V |
| Output Logic | LVCMOS | LVCMOS | LVCMOS |
| Output Enable Pin | Yes (pin 3) | Yes (pin 3) | Yes (pin 1 - different pin assignment) |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
Diferenciadores clave
- Best-in-class sub-50 fs additive phase jitter (frente a CDCLVC1104PWR)
- Same die and pinout as 553SCMGI8 for design reuse (frente a 553SCMGI8)
- Wide 2.375 V to 3.465 V supply range covers both 2.5 V and 3.3 V rails (frente a Single-rail competitors)
Notas de diseño
Place a 0.01 uF decoupling capacitor as close as possible between VDD (pin 1) and GND (pin 4) of the 553SDCGI. According to the Renesas 553S datasheet, this capacitor must be on the same PCB layer as the device with the shortest possible trace length to minimize supply-induced jitter on the clock outputs. For multi-buffer designs, use a star-ground topology from a low-impedance plane rather than daisy-chaining ground traces.
Use a 33 ohm series-termination resistor on each clock output (Q0 through Q3) when the PCB trace length exceeds 1 inch. According to the Renesas 553S datasheet, this termination suppresses reflections and preserves the low-skew performance the 553S is specified for. Match trace lengths across the four outputs to within 50 mils to keep output-to-output skew within datasheet limits.
Do not exceed the maximum supply voltage of 3.465 V on pin 1 - permanent damage can occur at higher voltages. Verify the output enable pin (pin 3) logic level against your design's power-sequencing requirements; on some 553S variants, leaving pin 3 floating disables the outputs. Always consult the specific 553S datasheet pinout table for the exact OE polarity of the 553SDCGI lot before finalizing the schematic.
Información de cumplimiento
RoHS and REACH compliance indicated on Renesas 553S product page. AEC-Q100 not applicable - this is an industrial/commercial clock buffer. Halogen-free and conflict-mineral declarations not present in verified web data; set to 'unknown'.
