STDMUA14-32.768K

Overview

The NDK STDMUA14-32.768K is a surface-mount tuning fork crystal oscillator operating at a nominal frequency of 32.768 kHz. It features a load capacitance of 6 pF and a frequency tolerance of ±20 ppm at 25°C. The component has an equivalent series resistance (ESR) maximum of 70 kOhms and operates within a temperature range of -40°C to +85°C. The physical package dimensions are 3.2 mm in length, 1.5 mm in width, and 0.9 mm in height. It utilizes a two-terminal SMD no-lead configuration.

Feature Summary

• Compact 3.2 x 1.5 mm surface-mount footprint designed for space-constrained applications
• Low power consumption characteristics suitable for battery-operated devices
• Robust mechanical construction with metal lid protection against shock and vibration

Applications

• Real-time clock circuits in portable consumer electronics
• Timekeeping modules in wearable devices such as smartwatches
• Low-power embedded systems requiring precise frequency references

Procurement Notes

Verify the specific load capacitance requirement of your microcontroller RTC interface before ordering, as this unit is specified at 6 pF. Ensure that the PCB layout accounts for the 3.2 x 1.5 mm SMD footprint dimensions. Confirm that the operating environment remains within the -40°C to +85°C range to maintain the stated ±20 ppm frequency tolerance. Check for any project-specific environmental compliance requirements beyond standard RoHS directives.

Selection Notes

Select this component when a small form factor is critical for the design. The 6 pF load capacitance requires matching with the MCU's internal or external capacitor network to achieve accurate timing. Consider the 70 kOhm ESR limit when designing the oscillation circuit for low-drive environments. This model serves as a direct replacement for other NX3215SA variants with identical electrical parameters but different packaging suffixes.

Part Context

This part belongs to the NX3215SA series of thin-type tuning fork crystals manufactured by NDK. The series is widely used in applications demanding high reliability and stability in compact packages. The STDMUA14 designation indicates specific manufacturing and packaging configurations within this product line, ensuring compatibility with standard automated assembly processes.

Replacement Considerations

Direct substitutes include NX3215SA-32.768K-STD-MUA-8 and NX3215SA-32.768K-STD-MUA-14, provided the load capacitance and tolerance specifications align with the original design requirements.