STDCQS1-40M

Overview

The STDCQS1-40M is a surface-mount crystal resonator manufactured by NDK, operating at a fundamental frequency of 40 MHz. It features a load capacitance of 8 pF and an equivalent series resistance (ESR) of 100 Ohms. The component exhibits a frequency tolerance and stability of ±15 ppm. Designed for surface mount installation, it utilizes a 4-SMD, no-lead package with dimensions of 3.20mm x 2.50mm and a maximum height of 0.60mm. The device operates within a temperature range of -10°C to +70°C and complies with RoHS standards.

Feature Summary

• Utilizes a compact 4-SMD no-lead package suitable for automated surface mount assembly.
• Provides high frequency stability with ±15 ppm tolerance for precise timing applications.
• Operates on fundamental mode resonance with an ESR of 100 Ohms.

Applications

• Clock signal generation in digital logic circuits
• Timing references for microcontrollers and processors
• Frequency control in communication modules

Procurement Notes

Verify the specific package dimensions and electrical parameters against the official NDK datasheet prior to integration. Confirm that the operating temperature range of -10°C to +70°C aligns with the environmental requirements of the target application. Ensure compatibility with the 8 pF load capacitance specified by the host circuit design to maintain accurate frequency performance.

Selection Notes

Select this component when a 40 MHz fundamental frequency is required with ±15 ppm stability. The 100 Ohm ESR must be compatible with the oscillator circuit's drive level constraints. Consider the 4-SMD footprint for space-constrained PCB layouts. Verify that the -10°C to +70°C temperature range meets the operational environment specifications.

Part Context

This part belongs to the NDK crystal resonator portfolio, which includes various SMD packages such as NX3225SA. NDK manufactures these components using培育人工水晶 technologies, emphasizing high stability and accuracy. The company supplies these devices for mobile communications, automotive electronics, and IoT applications, maintaining production facilities in Japan, China, Malaysia, and the US.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Cross-reference with other 40 MHz, 8 pF, 4-SMD crystals from different manufacturers only after verifying identical electrical parameters and mechanical dimensions.