SXT22418DC38-27.000M

Crystals Overview

The SXT22418DC38-27.000M is a surface-mount quartz crystal oscillator manufactured by Suntsu Electronics, Inc. It operates at a nominal frequency of 27.000 MHz and utilizes an AT-cut fundamental resonance design. The component features a 4-SMD, no-lead package with a footprint size of 2.5 x 2.0 mm. Key electrical specifications include a load capacitance of 18 pF and an equivalent series resistance (ESR) maximum of 80 Ohms within the 20–30 MHz range. Frequency stability is rated at ±25 ppm over the operating temperature range of -30°C to +85°C, with a normal temperature frequency tolerance of ±20 ppm.

Crystals Feature Summary

• Four-terminal surface mount design provides grounding pins for improved electromagnetic interference shielding compared to two-pin variants.
• AT-cut fundamental mode operation simplifies circuit design by eliminating the need for additional matching inductors required by overtone crystals.
• Industrial-grade temperature range ensures stable performance in outdoor or harsh environmental applications.

Crystals Applications

• Bluetooth low energy (BLE) positioning tags
• Short-range wireless communication devices
• PCMCIA cards and modems
• High-density industrial control systems

Crystals Procurement Notes

Verify the specific frequency tolerance and stability requirements against the application's RF specifications before ordering. Confirm that the 18 pF load capacitance matches the host oscillator circuit design. Ensure the PCB layout accommodates the 4-SMD no-lead package dimensions and properly connects the ground pins to minimize noise coupling. Cross-reference the datasheet for drive level limitations to prevent frequency drift or damage during operation.

Crystals Selection Notes

Select this component when space constraints require a 2520 footprint but electromagnetic compatibility is critical due to the four-pad grounding structure. It is suitable for projects requiring industrial temperature stability without the complexity of overtone circuits. Consider the ESR limits for oscillator startup reliability, particularly in cold environments. Evaluate cost-performance trade-offs between different tolerance grades if strict frequency accuracy is not mandatory for the specific wireless protocol.

Crystals Part Context

This part belongs to the SXT224 series of ceramic surface-mount crystals from Suntsu Electronics. The series is designed for compact wireless and industrial applications where small form factors and reliable frequency generation are essential. The naming convention indicates the package type, load capacitance, and frequency, allowing for straightforward identification within the manufacturer's portfolio of miniature resonators.

Crystals Replacement Considerations

Direct substitutes must match the 27.000 MHz frequency, 18 pF load capacitance, 4-SMD no-lead package, and similar thermal stability ratings. Verify that alternative components support the same ESR characteristics and drive level requirements to ensure circuit compatibility without redesigning the oscillator network.