9C-20.000MAAJ-T

Crystals Overview

The 9C-20.000MAAJ-T is a surface-mount MHz crystal manufactured by TXC Corporation, operating at a nominal frequency of 20 MHz. It features a frequency tolerance and stability of ±30 ppm within an operating temperature range of -20°C to +70°C. The component utilizes a fundamental oscillation mode with a load capacitance of 18 pF and an equivalent series resistance (ESR) of 30 Ohms. It is housed in an HC-49/US package with dimensions of 11.40 mm length, 4.80 mm width, and a maximum height of 4.10 mm.

Crystals Feature Summary

• Surface-mount construction for automated assembly
• Fundamental mode operation for stable frequency generation
• Compliant with RoHS standards

Crystals Applications

• Personal computers
• Set-top boxes
• LCD monitors
• Cable modems

Crystals Procurement Notes

Verify the specific package variant against the datasheet, as HC-49/US crystals may have different mounting requirements compared to standard through-hole versions. Confirm that the -20°C to +70°C temperature range meets the environmental specifications of the target application. Ensure the 18 pF load capacitance matches the oscillator circuit design parameters to maintain the specified ±30 ppm frequency accuracy.

Crystals Selection Notes

Select this component when a surface-mount solution is required for 20 MHz timing applications in consumer electronics. The HC-49/US form factor offers a balance between size and mechanical robustness. Consider the ±30 ppm stability limit; if tighter frequency control is necessary, alternative series with lower ppm ratings should be evaluated. Verify compatibility with the host system's drive level specifications, which typically range from 1 to 500 μW for this series.

Crystals Part Context

This part belongs to the 9C Series of metal can type crystals from TXC Corporation. The series is characterized by high frequency pullability and low equivalent series resistance. These components are designed for mass production and are commonly integrated into digital logic circuits requiring precise clock signals. The HC-49/US package is a widely recognized standard for surface-mount crystal units.

Crystals Replacement Considerations

Direct substitutes include other 20 MHz crystals with identical 18 pF load capacitance and ±30 ppm stability in the HC-49/US SMD package. Cross-reference with other manufacturers offering AEC-Q200 or similar automotive-grade certifications if higher reliability is required. Ensure the replacement maintains the same ESR value of 30 Ohms to prevent oscillator startup failures.