HC49/SMD-BF18-25ET-16.000M-TR

Crystals Overview

The HC49/SMD-BF18-25ET-16.000M-TR is a parallel fundamental quartz crystal manufactured by Transko Electronics, Inc. It operates at a nominal frequency of 16 MHz with a frequency tolerance of ±25 ppm. The component utilizes an HC-49/US package and features a load capacitance (CL) of 18 pF. Its equivalent series resistance (ESR) is specified at 40 ohms. This device is supplied in tape and reel packaging for automated surface-mount assembly.

Crystals Feature Summary

• Parallel fundamental quartz crystal construction
• HC-49/US surface-mount package design
• Tape and reel delivery format

Crystals Applications

• General clock generation circuits
• Microcontroller oscillator interfaces
• Frequency reference sources

Crystals Procurement Notes

Verify the specific datasheet version to confirm exact electrical parameters and mechanical dimensions. Ensure the application circuit matches the 18 pF load capacitance requirement. Confirm that the ±25 ppm frequency tolerance aligns with system timing requirements. Check that the 40 ohm ESR is compatible with the driving circuit's oscillation conditions. Validate that the tape and reel packaging meets production line specifications.

Crystals Selection Notes

Select this component when a 16 MHz surface-mount crystal is required. The 18 pF load capacitance dictates the external capacitor values needed for proper oscillation. The ±25 ppm tolerance suits applications with moderate frequency stability needs. The HC-49/US form factor allows for standard SMT placement. Consider the ESR value to ensure reliable startup in the target oscillator circuit.

Crystals Part Context

This part belongs to the HC49/SMD series from Transko Electronics, Inc., a manufacturer established in 1976 specializing in quartz crystals and frequency control products. The HC-49/US package is a common industry-standard form factor for through-hole and surface-mount crystals. The suffix indicates specific electrical characteristics and packaging configuration.

Crystals Replacement Considerations

Substitute parts must match the 16 MHz frequency, 18 pF load capacitance, and HC-49/US package. Verify that alternative components meet or exceed the ±25 ppm tolerance and 40 ohm ESR specifications. Ensure the replacement is available in tape and reel format if automated assembly is used.