FC-135R 32.7680KA-E

Crystals Overview

The EPSON FC-135R 32.7680KA-E is a surface-mount tuning fork crystal designed for low-power applications. It operates at a nominal frequency of 32.768 kHz with a standard tolerance of ±20 ppm at 25°C. The component features a load capacitance of 6 pF and an equivalent series resistance (ESR) of 50 kΩ maximum. It utilizes a 2-SMD, no-lead package with dimensions of 3.2 mm in length, 1.5 mm in width, and a maximum height of 0.90 mm. The device supports a working temperature range from -40°C to +85°C and is RoHS compliant.

Crystals Feature Summary

• Compact 3.2mm x 1.5mm SMD footprint optimized for space-constrained designs
• Low drive power capability suitable for battery-operated systems
• High stability with defined parabolic coefficient for temperature compensation
• Lead-free construction meeting environmental compliance standards

Crystals Applications

• Real-time clock circuits in wearable devices
• Battery-powered IoT sensor nodes
• Small communication equipment
• Consumer electronics requiring precise timekeeping

Crystals Procurement Notes

Verify the specific suffix 'E' corresponds to the required 6pF load capacitance, as other suffixes like 'A' or 'R' may indicate different electrical parameters such as 12.5pF or 20ppm tolerance variations. Confirm that the 50kΩ ESR specification aligns with the oscillator circuit design requirements. Ensure the operating temperature range of -40°C to +85°C meets the target application environment before finalizing procurement.

Crystals Selection Notes

Select this component when a small form factor and low power consumption are critical priorities. The 6pF load capacitance must match the MCU's internal or external capacitor configuration to ensure accurate frequency output. Consider the 50kΩ ESR limit for reliable startup in low-drive environments. This part is ideal for portable devices where size and energy efficiency dictate the hardware architecture.

Crystals Part Context

The FC-135R series represents Epson Timing's advanced line of kHz-range crystals engineered for miniaturization. The 'R' designation typically indicates improved performance characteristics compared to the standard FC-135 series, such as lower ESR. This specific model integrates high-quality quartz resonators into a robust surface-mount package, supporting the growing demand for compact timing solutions in modern electronics.

Crystals Replacement Considerations

Direct substitutes include the FC-135R 32.7680KA-A0 if a 12.5pF load capacitance is acceptable, or the FC-135R 32.7680KA-E3 which shares identical electrical specifications but may differ in packaging quantity. Verify mechanical compatibility and lead-free status when cross-referencing with generic 3215-sized crystals.