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Part Number: SG-8002JC20.8M PCC

Manufacturer: EPSON

Specifications:

• Frequency: 20.8 MHz
• Package Type: PCC (Plastic Chip Carrier)
• Load Capacitance: 20 pF
• Frequency Tolerance: ±50 ppm
• Operating Temperature Range: -20°C to +70°C
• Supply Voltage: 3.3V
• Output Type: CMOS
• Aging: ±5 ppm/year (max)
• Stability: High stability over temperature and voltage variations

Descriptions:

The SG-8002JC20.8M PCC is a surface-mount crystal oscillator (SPXO) from EPSON, designed for high-frequency stability and low power consumption. It is commonly used in telecommunications, networking, and embedded systems requiring precise timing.

Features:

• Compact Size: Suitable for space-constrained applications.
• Low Jitter: Ensures reliable clock signal generation.
• RoHS Compliant: Meets environmental standards.
• High Reliability: Stable performance under varying conditions.
• CMOS Output: Ensures compatibility with digital circuits.

This oscillator is ideal for applications requiring a stable 20.8 MHz clock source.

# Application Scenarios and Design Phase Pitfall Avoidance for SG-8002JC20.8M PCC

The SG-8002JC20.8M PCC is a high-precision crystal oscillator designed for applications requiring stable and reliable clock signals. With an operating frequency of 20.8 MHz, this component is widely used in telecommunications, embedded systems, and consumer electronics where timing accuracy is critical. Understanding its application scenarios and potential design pitfalls ensures optimal performance and longevity in electronic circuits.

## Key Application Scenarios

1. Telecommunications Equipment

The SG-8002JC20.8M PCC is commonly employed in networking devices such as routers, switches, and modems. Its stable frequency output ensures accurate data transmission and synchronization, reducing jitter and signal degradation in high-speed communication protocols.

2. Embedded Systems & Microcontrollers

Many microcontroller-based systems rely on precise clock signals for timing-sensitive operations. The SG-8002JC20.8M PCC provides a dependable reference clock for microcontrollers (MCUs), FPGAs, and DSPs, ensuring consistent performance in industrial automation, automotive electronics, and IoT applications.

3. Consumer Electronics

Devices like smart TVs, gaming consoles, and wearable technology benefit from the oscillator’s low phase noise and high stability. Its compact form factor makes it suitable for space-constrained designs without compromising signal integrity.

4. Medical & Test Equipment

Medical devices and laboratory instruments demand high timing accuracy for reliable operation. The SG-8002JC20.8M PCC is often integrated into diagnostic equipment, patient monitors, and signal generators where precision is non-negotiable.

## Design Phase Pitfall Avoidance

1. Incorrect Load Capacitance Matching

The SG-8002JC20.8M PCC requires proper load capacitance to maintain frequency stability. Mismatched capacitance can lead to frequency drift or oscillator failure. Always verify the datasheet specifications and select appropriate external capacitors to match the oscillator’s recommended load.

2. Poor PCB Layout Practices

Improper PCB routing near the oscillator can introduce noise and signal interference. To minimize parasitic effects:

• Keep traces short and direct.
• Avoid routing clock signals near high-noise components (e.g., power supplies).
• Use a solid ground plane beneath the oscillator for shielding.

3. Inadequate Power Supply Filtering

Voltage fluctuations can destabilize the oscillator’s output. Implement proper decoupling capacitors (e.g., 0.1 µF ceramic capacitors) near the power pins to suppress noise. Additionally, ensure the power supply voltage aligns with the oscillator’s operating range.

4. Thermal & Mechanical Stress Considerations

Excessive heat or mechanical stress can impact frequency stability. Avoid placing the oscillator near heat-generating components, and ensure proper mechanical mounting to prevent vibration-induced frequency deviations.

5. Improper Handling & Soldering

Excessive soldering temperatures or mechanical shock during assembly can damage the oscillator. Follow manufacturer-recommended soldering profiles and handle the component with ESD precautions to prevent latent failures.

## Conclusion

The SG-8002JC20.8M PCC is a versatile crystal oscillator suitable for a wide range of precision timing applications. By understanding its key use cases and proactively addressing common design pitfalls, engineers can maximize performance and reliability in their electronic designs. Careful attention to load matching, PCB layout, power filtering, and environmental factors ensures seamless integration and long-term stability.