SXT2249BA16-24.576M

Crystals Overview

The SXT2249BA16-24.576M is a surface-mount quartz crystal resonator manufactured by Suntsu Electronics, Inc., designed for precision timing applications in compact electronic circuits. Operating at a fundamental frequency of 24.576 MHz, this component utilizes AT-cut technology to ensure stable oscillation characteristics across varying environmental conditions. The device features a standard 4-SMD, no-lead package configuration, which facilitates automated assembly and enhances mechanical reliability compared to traditional leaded variants. It supports a load capacitance of 9 pF and exhibits an equivalent series resistance (ESR) typically within the range of 60 to 80 Ohms, depending on specific manufacturing tolerances. Frequency stability is rated at ±50 ppm, while initial frequency tolerance is specified at ±30 ppm, making it suitable for communication systems requiring precise clock signals.

Crystals Feature Summary

• Four-terminal surface mount design provides improved electromagnetic interference shielding and grounding capabilities compared to two-pin alternatives.
• AT-cut fundamental mode operation simplifies oscillator circuit design by eliminating the need for additional matching inductors required by overtone crystals.
• RoHS compliant construction ensures environmental safety and adherence to international regulatory standards for electronic components.

Crystals Applications

• Bluetooth low energy (BLE) modules and wireless sensor networks
• Zigbee and short-range radio frequency communication devices
• Industrial control systems with high-density board layouts
• Portable consumer electronics and wearable technology

Crystals Procurement Notes

Verify the specific suffix codes against the manufacturer's official datasheet to confirm exact electrical parameters, as variations may exist between production batches. Ensure that the ordering documentation explicitly references the full part number including all alphanumeric identifiers to prevent substitution errors. Confirm compliance requirements such as RoHS status directly with the supplier or authorized distributor prior to purchase. Request sample units for initial validation of oscillator circuit performance before committing to large-scale procurement volumes.

Crystals Selection Notes

Select this component when a small form factor is required alongside enhanced EMI performance due to its four-pad ground structure. Consider the ±50 ppm stability rating for applications where moderate frequency drift is acceptable over the operating temperature range. Evaluate the 9 pF load capacitance requirement against the host microcontroller's internal capacitance settings to ensure proper oscillation startup. Compare the ESR specifications with the oscillator circuit's drive level limitations to prevent overdriving the crystal element during operation.

Crystals Part Context

This model belongs to the SXT224 series of industrial-grade ceramic surface-mount crystals from Suntsu Electronics. The series is engineered for demanding environments where space constraints and signal integrity are critical. The 'BA16' designation indicates specific dimensional and pin configuration attributes within the product family. These components are positioned as alternatives to larger through-hole crystals or less robust two-pin SMD variants in modern miniaturized designs.

Crystals Replacement Considerations

Direct substitutes must match the 24.576 MHz frequency, 9 pF load capacitance, and 4-SMD package dimensions. Verify that alternative sources offer comparable ±50 ppm stability and similar ESR values to maintain circuit performance. Cross-reference pinout configurations to ensure compatibility with existing PCB footprints without modifying layout traces.

Crystals FAQ

Does the four-pin package configuration affect the electrical function compared to two-pin crystals?

No, the additional pins serve primarily as ground connections to improve shielding and reduce electromagnetic interference, rather than altering the core oscillation function.

What is the recommended drive level for this crystal to ensure longevity?

While maximum ratings vary, typical application notes suggest maintaining drive levels between 10 and 50 microwatts to prevent frequency instability or element damage.