SXTHM218CA174-40.000M

Crystals Overview

The SXTHM218CA174-40.000M is a surface-mount crystal oscillator manufactured by Suntsu Electronics, Inc. It operates at a fundamental frequency of 40.000 MHz with a load capacitance of 18 pF and an equivalent series resistance of 30 Ohms. The component supports frequency tolerances of ±25 ppm and ±50 ppm, ensuring stable timing performance. It functions within an operating temperature range of -10°C to +70°C. The device utilizes the HC-49S-SMD package format, providing a compact solution for space-constrained circuit designs requiring reliable clock signals.

Crystals Feature Summary

• Surface-mount construction for automated assembly
• HC-49S-SMD package geometry
• Fundamental mode operation at 40 MHz

Crystals Applications

• Microcontroller clock sources
• Communication interface timing
• Digital signal processing circuits

Crystals Procurement Notes

Verify the specific tolerance variant required, as datasheets indicate availability in both ±25 ppm and ±50 ppm configurations. Confirm the exact operating temperature grade matches the application environment, noting the -10°C to +70°C range. Ensure the PCB footprint aligns with the HC-49S-SMD package dimensions. Cross-reference the manufacturer's latest documentation to confirm RoHS compliance status and lead-free specifications before finalizing orders.

Crystals Selection Notes

Select this component when a low-profile surface-mount crystal is necessary for 40 MHz applications. The 18 pF load capacitance must match the oscillator circuit design requirements. Consider the 30 Ohm ESR for drive level limitations. The wide temperature range suits general industrial environments. Evaluate the physical size constraints against the HC-49S-SMD form factor to ensure adequate board space allocation.

Crystals Part Context

This part belongs to the SXTHM218 series of surface-mount crystals from Suntsu Electronics. The series offers various frequency options and package styles. The CA suffix typically denotes specific packaging or tolerance characteristics within the product line. These components are designed for general-purpose timing applications where standard stability is sufficient.

Crystals Replacement Considerations

Direct substitutes include other HC-49S-SMD crystals with identical 40 MHz frequency, 18 pF load capacitance, and compatible ESR values. Verify that alternative manufacturers offer matching temperature ranges and tolerance grades. Ensure pin compatibility and mechanical dimensions align with existing footprints.