FC-135R 32.7680KF-E5

Crystals Overview

The FC-135R 32.7680KF-E5 is a surface-mount quartz crystal unit manufactured by Epson Timing, designed for precision timing applications in compact electronic devices. It operates at a nominal frequency of 32.768 kHz with a tight frequency tolerance of ±10 ppm. The component features a low equivalent series resistance (ESR) of 50 kΩ maximum and supports a load capacitance of 6 pF. Housed in a small 3.2 mm x 1.5 mm SMD package, it functions within an operating temperature range of -40°C to +85°C, ensuring reliable performance in consumer electronics and microcontroller sub-clock circuits.

Crystals Feature Summary

• Low ESR design optimized for MCU sub-clocks
• Compact 3.2mm x 1.5mm SMD footprint
• High frequency stability with ±10ppm tolerance

Crystals Applications

• Microcontroller real-time clock circuits
• Consumer electronics timing references
• Portable device sub-clock modules

Crystals Procurement Notes

Verify the specific suffix 'E5' against official Epson documentation to confirm the exact load capacitance and tolerance specifications, as suffixes define critical electrical parameters. Ensure compatibility with the target circuit's load capacitance requirements before integration. Cross-reference the part number with authorized distributors to obtain valid datasheets and compliance certificates such as RoHS status.

Crystals Selection Notes

Select this component when high frequency accuracy is required alongside minimal power consumption in space-constrained designs. The low ESR characteristic makes it suitable for driving capacitive loads efficiently. Compare against standard FC-135 variants if tighter tolerance or different packaging options are needed for the specific application environment.

Crystals Part Context

This part belongs to the FC-135R series, which represents a low ESR variant of Epson's widely adopted FC-135 crystal line. The series is engineered for reliability in consumer electronics, offering improved performance over standard crystals while maintaining a small form factor suitable for modern PCB layouts.

Crystals Replacement Considerations

• FC-135R 32.7680KA-E5
• FC-135 32.7680KF-A0

Crystals FAQ

What is the maximum ESR for this crystal?

The maximum Equivalent Series Resistance (ESR) is 50 kΩ.

What is the frequency tolerance?

The frequency tolerance is ±10 ppm at room temperature.