STDCRA1-20M

Overview

The STDCRA1-20M is a surface-mount MHz crystal manufactured by NDK. It operates at a nominal frequency of 20 MHz with a frequency tolerance of ±50 ppm and a stability of ±100 ppm. The component features an equivalent series resistance (ESR) of 100 Ohms and requires a load capacitance of 8 pF. 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 supports fundamental mode operation and functions within a temperature range of -40°C to +85°C.

Feature Summary

• Supports fundamental oscillation mode for stable signal generation
• Designed for surface-mount assembly in compact electronic circuits
• Complies with RoHS environmental standards

Applications

• General-purpose clock sources for microcontrollers
• Timing references for communication interfaces
• Embedded systems requiring standard frequency stability

Procurement Notes

Verify the specific frequency tolerance and ESR requirements against the official datasheet before procurement. Confirm that the 8 pF load capacitance matches the target circuit design. Ensure the operating temperature range of -40°C to +85°C aligns with the intended application environment. Check for compliance with relevant regulatory standards such as RoHS.

Selection Notes

Select this component when a 20 MHz fundamental mode crystal is required for surface-mount applications. Consider the 100 Ohm ESR and 8 pF load capacitance to ensure proper oscillator circuit matching. Evaluate the ±50 ppm tolerance against system timing accuracy needs. Verify that the 3.20mm x 2.50mm footprint fits the PCB layout constraints.

Part Context

This part belongs to NDK's line of miniature crystal devices, which are known for high stability and accuracy. NDK manufactures these components using artificial crystal cultivation technology, ensuring consistent quality across their product range. The company serves various markets including consumer electronics and industrial applications with its SMD crystal offerings.

Replacement Considerations

Direct substitutes may include other 20 MHz SMD crystals with similar electrical parameters. Verify compatibility regarding load capacitance, ESR, and physical dimensions. Cross-reference with NDK's NX series or comparable industry-standard parts if supply availability is a concern.