DF18CC1-24.000MHZ-T

Crystals Overview

The DF18CC1-24.000MHZ-T is a surface-mount MHz crystal manufactured by MMD Monitor/Quartztek, housed in an HC-49/US package. It operates at a nominal frequency of 24 MHz with a frequency tolerance of ±15ppm and stability of ±30ppm over the operating temperature range. The component features a load capacitance of 18pF and an equivalent series resistance (ESR) of 30 Ohms. Designed for fundamental mode operation, it supports a maximum drive level of 1 mW. The physical dimensions are 11.7 mm in length, 4.8 mm in width, and a maximum height of 4.5 mm. It functions within a temperature range of -40°C to +85°C.

Crystals Feature Summary

• Surface-mounted design utilizing the standard HC-49/US form factor for automated assembly compatibility.
• Fundamental oscillation mode ensuring stable frequency generation with low phase noise characteristics.
• Compliant with RoHS directives for environmentally safe electronic manufacturing processes.

Crystals Applications

• Microcontroller clock sources requiring precise timing references
• Communication interface circuits such as UART or SPI synchronization
• Digital signal processing systems needing stable oscillator inputs

Crystals Procurement Notes

Verify the manufacturer designation on official datasheets, as some listings may attribute this part to ABRACON while others cite MMD Monitor/Quartztek. Confirm that the specific suffix matches the required frequency and tolerance specifications. Ensure the ordering documentation explicitly states the HC-49/US SMD package type to avoid confusion with through-hole variants. Cross-reference the ESR value of 30 Ohms against circuit requirements to guarantee proper oscillator startup conditions.

Crystals Selection Notes

Select this component when a surface-mount solution is required for a 24 MHz reference signal. The 18pF load capacitance must match the external capacitors specified in the host microcontroller or oscillator circuit schematic. Verify that the system's drive level does not exceed 1 mW to prevent frequency pulling or crystal damage. Consider the ±30ppm stability requirement against the total system timing budget, including temperature-induced drift across the -40°C to +85°C operational range.

Crystals Part Context

This part belongs to the D and F Series of crystals from MMD Monitor/Quartztek, which offers wide frequency ranges in HC-49/US packages. These components are designed for both fundamental and third overtone operations depending on the specific model configuration. The series emphasizes compliance with military standards for shock and solderability, supporting robust industrial and commercial applications.

Crystals Replacement Considerations

Direct substitutes include other manufacturers offering HC-49/US SMD crystals with identical 24 MHz frequency, 18pF load capacitance, and comparable ESR values. Verify pinout compatibility and mechanical footprint alignment before substitution. Ensure alternative parts meet the same ±15ppm tolerance and -40°C to +85°C temperature rating to maintain system performance integrity.