NB3N502DR2G - 14-190 MHz PLL Clock Multiplier, SOIC-8 | onsemi
N.º da peça: NB3N502DR2G ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $2.85 | $2,85 |
| 10 | $2.55 | $25,50 |
| 100 | $2.18 | $218,00 |
| 500 | $1.84 | $920,00 |
| 1.000 | $1.59 | $1.590,00 |
| 2.500 | $1.39 | $3.475,00 |
NB3N502DR2G Visão geral
A PLL clock multiplier is a feedback-controlled oscillator that phase-locks a Voltage-Controlled Oscillator (VCO) to a lower-frequency reference, allowing the system to derive a high-frequency clock from a low-frequency, low-cost crystal. In the broader taxonomy, the NB3N502 belongs to the clock-generator / frequency-synthesizer family of timing ICs, sitting beneath clock buffers and above generic phase-locked loops in the timing-and-signal-conditioning hierarchy of power management and signal-chain semiconductors. PLL multipliers are commonly used when a stable, low-jitter high-frequency clock is required but only a low-frequency crystal is available, or when the reference frequency must be precisely scaled to meet downstream logic requirements.
Key features include TTL/CMOS-compatible output drive, internal loop filter components, and a wide industrial operating temperature range of -40 degrees C to +85 degrees C. The device integrates the PLL, VCO, and output divider on a single monolithic CMOS die, eliminating external loop-filter design. Its pin-selectable multiplier ratios (when applicable) and standard SOIC-8 footprint simplify drop-in replacement of legacy clock-generator circuits. The NB3N502DR2G is also Pb-free and supplied on a 2500-piece reel, suitable for high-volume surface-mount assembly.
The architecture uses a digital phase-frequency detector driving an on-chip charge pump and VCO, with the multiplied output divided back to the reference frequency to close the loop. This analog PLL approach yields much lower jitter than simple frequency doublers built from XOR gates or delay lines, which is critical for downstream microcontrollers, FPGAs, and communications ASICs that derive internal clocks from the multiplied reference. The single-supply 3.3 V/5 V operation also simplifies integration into mixed-voltage designs without level shifters on the supply rail.
Typical applications include replacing crystal oscillators in networking equipment, generating CPU/FPGA reference clocks in embedded systems, producing pixel clocks for video and display controllers, and providing low-jitter timing in industrial automation and instrumentation. The NB3N502DR2G is also widely used as a low-cost clock source for microcontroller (MCU) families that require an external multiplied reference.
When designing with the NB3N502DR2G, ensure the input reference drive level meets the datasheet-specified VIH/VIL thresholds and that the PCB layout keeps the input trace short to minimize reflections. Decouple VDD3VCC with a 0.1 ohm ceramic + 10uF bulk capacitor pair, and place the load capacitor (when applicable) close to the IC to control output rise and fall characteristics.
Alternativas drop-in para NB3N502DR2G — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
NB3N502DG
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
NB3N502DR2
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
502MILFT
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
502MLFT
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
502MI
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
NB3N502DR2G Especificações
| Função | PLL Clock Multiplier |
| Output Frequency Range | 14 MHz to 190 MHz |
| Input Clock Frequency Range | 2 MHz to 50 MHz |
| Número de saídas | 1 |
| Tensão de alimentação | 3.3 V or 5.0 V |
| Output Level | TTL/CMOS |
| Duty Cycle | 50% (typical) |
| Faixa de temperatura de operação | -40 C to +85 C |
| Encapsulamento | SOIC-8 (narrow body, 3.90 mm) |
| Tipo de montagem | Surface Mount |
| Packaging | Tape & Reel (R2 = 2500 pcs) |
| Pb-Free | Yes |
| Status RoHS | Compliant |
| Input Type | Fundamental-mode crystal or external reference |
| Jitter | Sub-nanosecond period jitter (datasheet figure) |
Configuração de pinos do NB3N502DR2G
| Pino 1 | VDD — Positive supply (3.3 V or 5.0 V) |
| Pino 2 | REF_IN — Reference clock input / crystal pin (per datasheet) |
| Pino 3 | REF_IN — Reference clock input / crystal pin (per datasheet) |
| Pino 4 | GND — Ground |
| Pino 5 | CLK_OUT — Multiplied TTL/CMOS clock output |
| Pino 6 | NC — Not connected (per datasheet) |
| Pino 7 | NC — Not connected (per datasheet) |
| Pino 8 | NC — Not connected (per datasheet) |
Aplicações típicas
NB3N502DR2G é adequado para 6 aplicaçãos: Crystal Oscillator Replacement in Embedded Systems, Networking Equipment Clock Generation, FPGA Reference Clock Source, Video and Display Pixel Clock Generation, Industrial Automation and Instrumentation Timing, Communications ASIC Reference Clock.
Crystal Oscillator Replacement in Embedded Systems
The NB3N502DR2G's 14-190 MHz output range and 2-50 MHz reference input let it replace a custom-frequency crystal oscillator in cost-sensitive embedded designs. By feeding a low-cost 25 MHz fundamental crystal into the input, the internal PLL multiplies it up to any point in the 14-190 MHz output range, delivering sub-nanosecond period jitter to downstream MCUs and FPGAs without paying for a custom-spec crystal. This is especially valuable in volume production where the multiplied output can be tuned via reference selection rather than a custom crystal cut.
Recomendado
Networking Equipment Clock Generation
Routers, switches, and base-station equipment require low-jitter reference clocks for PHYs, MACs, and timing-recovery PLLs. The NB3N502DR2G's TTL/CMOS output drive and 50 percent duty cycle at up to 190 MHz feed directly into Ethernet PHYs and SerDes reference inputs, replacing expensive TCXOs with a PLL-multiplied crystal at a fraction of the cost. The industrial -40 C to +85 C temperature range supports outdoor and uncontrolled-environment deployments common in telecom infrastructure.
Recomendado
FPGA Reference Clock Source
FPGAs in industrial control and test instrumentation require stable, low-jitter reference clocks for their internal PLLs and logic arrays. The NB3N502DR2G's 190 MHz maximum output covers the common 100 MHz, 125 MHz, 156.25 MHz, and 166 MHz reference frequencies used by mid-range FPGAs, while its TTL/CMOS levels match directly to FPGA global clock input pins without level translation. The integrated PLL eliminates the need for an external clock-feedback circuit, simplifying the FPGA reference-clock PCB layout.
Recomendado
Video and Display Pixel Clock Generation
Display controllers, video processors, and LCD drivers need precise pixel clocks in the 25-150 MHz range for standard video timings. The NB3N502DR2G's 14-190 MHz output range covers all common pixel-clock frequencies for VGA, SVGA, XGA, and 720p/1080p display timings, while its low jitter preserves horizontal and vertical timing margins. The single 3.3V supply integrates directly into typical video-processor power trees without additional regulators.
Recomendado
Industrial Automation and Instrumentation Timing
Programmable Logic Controllers (PLCs), data-acquisition systems, and industrial sensors require deterministic clock generation that survives the -40 C to +85 C industrial range. The NB3N502DR2G's full industrial temperature rating and TTL/CMOS output drive make it suitable for PLC backplane timing, ADC/DAC sampling clocks, and sensor-interface ASICs. Its monolithic CMOS integration reduces component count on noisy industrial PCBs where discrete oscillator modules may pick up EMI.
Recomendado
Communications ASIC Reference Clock
Wireless baseband processors, DSL modems, and point-to-point radio ASICs often require a clean reference clock at frequencies not readily available as standard crystals. The NB3N502DR2G's PLL multiplication from a low-cost 2-50 MHz reference provides the flexibility to generate custom reference frequencies for proprietary ASIC timing chains. The TTL/CMOS output and 3.3 V operation match directly to most modern comms ASIC reference inputs without level translation.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para NB3N502DR2G — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | NB3N502DG | NB3N502DR2 | 502MILFT | 502MLFT | 502MI |
|---|---|---|---|---|---|---|
| Brand | onsemi | onsemi | onsemi | Renesas | Renesas | Renesas |
| Package | SOIC-8 (narrow body, 3.90 mm) | SOIC-8 (narrow body, 3.90 mm) - same | SOIC-8 (narrow body, 3.90 mm) - same | SOIC-8 (narrow body, 3.90 mm) - same | SOIC-8 (narrow body, 3.90 mm) - same | SOIC-8 (narrow body, 3.90 mm) - same |
| Output Frequency Range | 14 MHz to 190 MHz | 14 MHz to 190 MHz | 14 MHz to 190 MHz | 14 MHz to 190 MHz (per FindIC) | 14 MHz to 190 MHz (per FindIC) | Similar range, verify on datasheet |
| Input Clock Range | 2 MHz to 50 MHz | 2 MHz to 50 MHz | 2 MHz to 50 MHz | 2 MHz to 50 MHz (per FindIC) | 2 MHz to 50 MHz (per FindIC) | Similar range, verify on datasheet |
| Supply Voltage | 3.3 V or 5.0 V | 3.3 V or 5.0 V | 3.3 V or 5.0 V | 3.3 V or 5.0 V (per FindIC) | 3.3 V or 5.0 V (per FindIC) | 3.3 V or 5.0 V (typical for IDT 502 series) |
| Output Level | TTL/CMOS | TTL/CMOS | TTL/CMOS | TTL/CMOS (per FindIC) | TTL/CMOS (per FindIC) | TTL/CMOS |
| Operating Temperature Range | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C (industrial) | -40 C to +85 C (industrial) | -40 C to +85 C (industrial) |
| Pb-Free / RoHS | Yes / Compliant | Yes / Compliant | No (older non-Pb-free variant) | Yes / Compliant | Yes / Compliant | Yes / Compliant |
| Packaging Carrier | Tape & Reel (2500 pcs) | Tube | Tape & Reel (2500 pcs) | Tape & Reel | Tape & Reel | Tube (98 pcs) |
| Approx. Unit Price (qty 1, USD) | 2.85 | 2.85 | 2.85 (obsolete stock) | 3.10 (Renesas typical) | 3.10 (Renesas typical) | 2.95 (Renesas typical) |
Principais diferenciais
- Lower unit price than Renesas equivalents at qty 1 (vs 502MILFT)
- Pb-Free RoHS compliance for new designs (vs NB3N502DR2)
- Tape-and-reel packaging for high-volume SMT assembly (vs NB3N502DG)
Notas de projeto
Place the 0.1 ohm ceramic + 10 uF bulk decoupling pair on VDD (pin 1) within 3 mm of the IC, with the ceramic closest to the pin. Keep the input reference trace (pins 2 and 3) as short as possible - under 10 mm - to minimize reflections and EMI pickup. Route the CLK_OUT trace (pin 5) over an unbroken ground plane to preserve the 50 percent duty cycle and limit radiated emissions from the high-edge-rate TTL/CMOS output.
Surround the SOIC-8 footprint with a guard ring tied to GND (pin 4) to isolate the input reference pins from the CLK_OUT pin. This prevents the high-frequency output edge from coupling back into the PLL reference input and degrading jitter. Place the GND pin directly to the ground plane with at least two vias to minimize ground bounce at the multiplied clock frequency.
Do not exceed the 5.5 V absolute-maximum rating on VDD - transients above this will damage the PLL charge pump. Ensure the input reference clock meets the VIH/VIL thresholds in the datasheet, especially at 3.3 V supply where TTL-level noise margins are tighter than at 5.0 V. Do not leave NC pins (6, 7, 8) floating externally - they are no-connect on the die but leaving them unconnected is fine and does not affect operation.
The TTL/CMOS output has sub-nanosecond rise/fall times that can excite transmission-line effects on traces longer than ~25 mm. For clock traces longer than 25 mm, consider a series damping resistor (10-33 ohm) near the CLK_OUT pin to limit overshoot. For load-sensitive applications, place a 50 ohm characteristic-impedance trace on CLK_OUT to match the downstream clock-receiver input.
Informações de conformidade
Pb-free G suffix confirms RoHS compliance per onsemi part numbering. Industrial temperature range -40 C to +85 C; not AEC-Q100 automotive qualified.
