Epson FC2012AN 32.768 kHz Crystal: Ultra-Compact Timing Solution for Precision Applications

Introduction
The Epson FC2012AN 32.768000 kHz crystal is a high-performance, surface-mount device (SMD) designed to deliver exceptional frequency stability in a miniature footprint. Manufactured in Japan, this 32.768 kHz tuning fork crystal is optimized for real-time clock (RTC) modules and timing circuits across a wide range of industries, including consumer electronics, automotive systems, industrial automation, and medical devices. With its ultra-compact dimensions of 2.05 x 1.2 x 0.6 mm, robust temperature tolerance (-40°C to +105°C), and ±20 ppm frequency accuracy, the FC2012AN series ensures reliable timekeeping and signal synchronization in space-constrained, harsh-environment applications.

Product Overview
Part number X1A000171000318, the FC2012AN belongs to Epson’s FC2012AN series of kHz-grade crystals. Its 32.768 kHz frequency is a standard for RTC modules, enabling precise time/date tracking in electronic systems. The 2P 2012 package (2.05 x 1.2 mm footprint) and 0.6 mm profile make it one of the smallest crystals in its class, ideal for modern miniaturized designs. With a load capacitance of 7 pF and a wide operating temperature range, this crystal balances performance, durability, and space efficiency.

Key Features

1. Ultra-Miniature Design:

• 2.05 x 1.2 x 0.6 mm Dimensions: Saves critical PCB space, enabling integration into slim devices like wearables and IoT sensors.

• 2012 Package (2.0 x 1.2 mm Standard): Compatible with automated pick-and-place assembly, reducing manufacturing costs.

2. High Frequency Stability:

• ±20 ppm Frequency Tolerance: Ensures precise timekeeping over the entire temperature range (-40°C to +105°C).

• Low Phase Noise: Maintains signal integrity for reliable clock generation in noise-sensitive applications.

3. Robust Performance:

• Wide Temperature Range (-40°C to +105°C): Operates reliably in extreme environments, from automotive underhood systems to outdoor industrial equipment.

• 7 pF Load Capacitance: Simplifies circuit design by matching standard RTC module requirements.

4. Durability and Consistency:

• Tuning Fork Structure: Provides stable oscillation characteristics with minimal aging effects.

• Hermetically Sealed Package: Protects the crystal element from moisture, dust, and mechanical stress.

5. Supply Chain Efficiency:

• Standard Reel Packaging: Supports high-volume production with a minimum order quantity (MOQ) of 5,000 units.

• Japanese Manufacturing: Guarantees consistent quality and adherence to stringent production standards.

Technical Specifications

• Frequency: 32.768 kHz ±20 ppm

• Operating Temperature: -40°C to +105°C

• Load Capacitance: 7 pF

• Storage Temperature: -55°C to +125°C

• ESR (Equivalent Series Resistance): 70 kΩ max

• Drive Level: 0.5 µW max

• Aging: ±5 ppm/year max

• Package: 2P 2012 (2.05 x 1.2 x 0.6 mm)

Applications

1. Consumer Electronics:

• Smartwatches & Fitness Trackers: Provides accurate timekeeping for health monitoring and notification systems.

• Smartphones/Tablets: Integrates into RTC modules to manage alarms, timers, and power-saving sleep modes.

• IoT Devices: Synchronizes data logging in smart home sensors, asset trackers, and energy meters.

2. Automotive Systems:

• Infotainment Units: Maintains real-time clock accuracy for navigation and multimedia interfaces.

• Telematics Control Modules (TCM): Supports timestamping for vehicle diagnostics and event recording.

• ADAS & Battery Management Systems (BMS): Ensures precise timing for safety-critical operations.

3. Industrial Equipment:

• Programmable Logic Controllers (PLCs): Synchronizes automation processes in manufacturing lines.

• Smart Meters: Enables accurate billing cycles in electricity, water, or gas metering systems.

• Outdoor Monitoring Devices: Withstands temperature extremes in agricultural or environmental sensors.

4. Medical Devices:

• Portable Patient Monitors: Tracks vital signs with timestamp accuracy for diagnostics.

• Implantable Devices: Ultra-reliable timing for low-power operation in hearing aids or drug delivery systems.

5. Emerging Technologies:

• Wearable Health Tech: Supports miniaturized designs for ECG patches or glucose monitors.

• Edge Computing Modules: Provides timing synchronization for AI-driven IoT gateways.

Advantages Over Competing Solutions

• Space Optimization: The 2012 package is 30% smaller than traditional 3215 (3.2 x 1.5 mm) crystals, freeing PCB area for additional components.

• Extended Temperature Resilience: Outperforms standard crystals limited to -30°C to +85°C, making it suitable for automotive and industrial use.

• Long-Term Stability: Low aging rate (±5 ppm/year) ensures consistent performance over the device’s lifespan.

Design Considerations

• Matching Load Capacitance: To achieve optimal frequency accuracy, pair the crystal with matching capacitors (e.g., two 14 pF capacitors for a 7 pF load).

• PCB Layout: Keep traces short between the crystal and the oscillator IC to minimize parasitic capacitance and EMI interference.

Conclusion
The Epson FC2012AN 32.768 kHz crystal is a cornerstone of precision timing in modern electronics. Its combination of ultra-compact size, rugged construction, and exceptional frequency stability makes it indispensable for applications demanding reliable real-time clock functionality. Whether integrated into a wearable device surviving daily wear-and-tear, an automotive module enduring temperature swings, or an industrial sensor operating in harsh conditions, this crystal delivers uncompromising performance.

For engineers seeking to balance miniaturization with robustness, the FC2012AN series represents a trusted, future-proof solution backed by Epson’s legacy of quality and innovation.