XTAL-14.31818MHZ-HC49U

Overview

The Jameco Electronics XTAL-14.31818MHZ-HC49U is a radial through-hole crystal oscillator operating at a nominal frequency of 14.31818 MHz. It utilizes an HC-49/UA package with dimensions of 11.5 mm in length, 5 mm in width, and 2.1 mm in height. The component features a load capacitance of 18 pF, a tolerance of 20 ppm, and a frequency stability of 50 ppm over the commercial temperature range of -20°C to +70°C. It exhibits an equivalent series resistance (ESR) of 50 ohms and operates with an input drive level of 100 uW.

Feature Summary

• Provides stable oscillation at 14.31818 MHz for timing applications
• Utilizes standard HC-49/UA radial package for easy integration
• Maintains frequency stability within specified limits across commercial temperatures

Applications

• Microcontroller clock sources
• Communication interface timing
• General-purpose electronic circuit timing

Procurement Notes

Verify the specific manufacturer designation associated with the Jameco part number, as sourcing may involve third-party manufacturers like James Electronics or Valuepro lines. Confirm that the HC-49/UA package dimensions and pin configuration match your PCB layout requirements. Ensure the 100 uW drive level is compatible with your oscillator circuit design to prevent frequency pulling or damage. Check RoHS compliance status if required by your manufacturing standards.

Selection Notes

Select this component when a precise 14.31818 MHz reference is required for digital logic or communication protocols. The HC-49/UA form factor is suitable for prototyping and general electronics where space constraints are minimal. Consider the 20 ppm tolerance and 50 ppm stability against your system's jitter and accuracy requirements. The commercial temperature range limits suitability for harsh environmental applications.

Part Context

This crystal belongs to the family of fundamental mode AT-cut quartz crystals commonly used in consumer and industrial electronics. The 14.31818 MHz frequency is historically significant for video and data processing systems due to its divisibility into common pixel and baud rates. The HC-49/U series remains a standard mechanical footprint for axial or radial mounting in legacy and modern designs alike.

Replacement Considerations

Direct substitutes include other 14.31818 MHz crystals in the HC-49/US or HC-49/U packages with matching 18 pF load capacitance and similar ESR values. Verify that alternative parts meet the same 20 ppm tolerance and 50 ppm stability specifications. Ensure the replacement supports the 100 uW drive level to maintain operational integrity.