MU00990-32.768K

Overview

The MU00990-32.768K is a surface-mount crystal resonator manufactured by NDK (NIHON DEMPA KOGYO CO., LTD). It operates at a fundamental frequency of 32.768 kHz with a frequency stability and tolerance of ±20 ppm. The component features a load capacitance of 6 pF and an equivalent series resistance (ESR) of 40 kOhms. It utilizes a 2-SMD, no lead package configuration.

Feature Summary

• Fundamental mode operation for precise timing applications
• Compact surface-mount design suitable for space-constrained PCB layouts
• High ESR characteristic compatible with low-power oscillator circuits

Applications

• Real-time clock circuits in consumer electronics
• Timekeeping modules in portable devices
• Low-frequency reference sources in embedded systems

Procurement Notes

Verify the specific load capacitance requirement of your target circuit against the component's 6 pF specification to ensure accurate oscillation frequency. Confirm that the 40 kOhm ESR value aligns with the oscillator IC's drive level constraints. Ensure the 2-SMD footprint matches the board layout dimensions before finalizing procurement orders.

Selection Notes

Select this component when a stable 32.768 kHz reference is required for time-based functions. The ±20 ppm stability is standard for general-purpose real-time clocks. Consider the 6 pF load capacitance compatibility with existing oscillator designs. This part is suitable for applications where moderate frequency accuracy suffices and compact SMD packaging is preferred over through-hole alternatives.

Part Context

This crystal belongs to NDK's portfolio of quartz resonators, which are widely used in mobile communications, automotive electronics, and IoT devices. NDK manufactures these components using培育人工水晶 technology to ensure high frequency stability across various environmental conditions. The company maintains production facilities in Japan, China, Malaysia, and the US to support global supply chains.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation.