F5X-32768-125-D90-R-N

Crystals Overview

The F5X-32768-125-D90-R-N is a surface-mount quartz crystal oscillator manufactured by River Eletec Corporation. It operates at a nominal frequency of 32.768 kHz with a standard tolerance of ±20 ppm at 25°C. The component utilizes a 4-SMD, no-lead package configuration with dimensions of 1.2 x 1.0 x 0.35 mm. It features a maximum equivalent series resistance (ESR) of 90 kΩ and is designed for a load capacitance of 12.5 pF. The device supports a standard operating temperature range of -40°C to +85°C.

Crystals Feature Summary

• Utilizes a 1210 footprint with a thickness of 0.35 mm, enabling integration into ultra-thin electronic assemblies.
• Employs metal diffusion sealing technology to enhance hermeticity and environmental stability compared to traditional adhesive sealing methods.
• Constructed with a quartz crystal housing that reduces weight significantly while improving thermal expansion matching and shock resistance.

Crystals Applications

• Real-time clock circuits in wearable electronics
• Low-power embedded systems requiring minimal form factor
• Automotive sensing nodes and infotainment RTCs

Crystals Procurement Notes

Verify the specific load capacitance requirement against the target circuit design, as this variant is specified for 12.5 pF. Confirm that the 90 kΩ ESR limit aligns with the oscillator circuit's drive level constraints. Ensure the PCB layout accommodates the 4-SMD no-lead package geometry. Check if the standard -40°C to +85°C temperature range meets the operational environment requirements, noting that extended ranges may require different part numbers.

Crystals Selection Notes

Select this component when space constraints necessitate the smallest available 32.768 kHz crystal profile. It is suitable for applications prioritizing low power consumption due to high ESR characteristics. Consider alternative load capacitance values if the host circuit does not support 12.5 pF. Evaluate the need for automotive qualification if deploying in vehicle environments, as standard versions may differ from AEC-Q200 certified variants.

Crystals Part Context

This model belongs to the TFX/F5X series of miniature tuning fork crystals. It represents a shift toward quartz-based packaging rather than ceramic alternatives to improve mechanical and thermal performance. The series targets the miniaturization trends in consumer electronics and IoT devices where traditional HC-49 or larger SMD crystals cannot fit within strict enclosure limits.

Crystals Replacement Considerations

Direct substitutes include other 1210-sized 32.768 kHz crystals with matching 12.5 pF load capacitance and similar ESR specifications. Verify pin compatibility and thermal characteristics when cross-referencing with competing manufacturers' offerings.