FC-135R 32.7680KF-A3

Crystals Overview

The FC-135R 32.7680KF-A3 is a surface-mount tuning fork crystal manufactured by Epson Timing. It operates at a nominal frequency of 32.768 kHz with a tolerance of ±10 ppm. The component features a load capacitance of 12.5 pF and an equivalent series resistance (ESR) of 50 kOhms maximum. It supports a drive level of up to 1 µW, with a typical value of 0.5 µW. The physical dimensions are 3.2 mm in length, 1.5 mm in width, and 0.8 mm in height. It functions in fundamental mode and is rated for an operating temperature range of -40°C to +85°C.

Crystals Feature Summary

• Compact 3.2mm x 1.5mm SMD package suitable for space-constrained designs
• High frequency stability with ±10 ppm tolerance
• Low power consumption optimized for battery-operated systems

Crystals Applications

• Small communication devices
• Automotive multimedia systems
• Body electronics
• Remote keyless entry systems
• Engine control units

Crystals Procurement Notes

Verify the specific suffix 'A3' against official Epson documentation to confirm pin configuration and packaging details. Ensure the selected variant matches the required frequency tolerance and load capacitance for the target circuit design. Cross-reference the manufacturer part number with authorized distributors to confirm current production status and availability constraints.

Crystals Selection Notes

Select this component when a precise 32.768 kHz reference is required in a compact form factor. The ±10 ppm tolerance offers higher accuracy than standard ±20 ppm variants. Consider the 12.5 pF load capacitance requirement for oscillator circuit matching. Evaluate the 50 kOhm ESR limit against the host oscillator's drive capability to ensure stable operation within the specified temperature range.

Crystals Part Context

This part belongs to the FC-135R series of tuning fork crystals from Epson Timing. The series is designed for general-purpose timing applications requiring small footprints. The FC-135R family provides various frequency options and tolerances, with the KF suffix indicating the ±10 ppm precision grade. These components utilize quartz resonators packaged in leadless surface-mount configurations.

Crystals Replacement Considerations

Direct substitutes include other 32.768 kHz ±10 ppm crystals in 3.2x1.5mm packages from manufacturers such as NDK or Seiko Instruments. Verify that alternative parts match the 12.5 pF load capacitance and 50 kOhm ESR specifications. Check for compatibility with existing PCB land patterns and reflow soldering profiles.