XTL741-S999-379

Crystals Overview

The Siward XTL741-S999-379 is a passive quartz crystal resonator designed for precision timing applications. It operates at a fundamental frequency of 32.768 kHz, making it suitable for clock generation in low-power electronics. The component features a frequency tolerance of ±20 ppm and an equivalent series resistance (ESR) of 80 kOhms. It utilizes a load capacitance of 7 pF and functions within a temperature range of -40°C to +85°C. The physical package is a compact 2-SMD surface-mount type with no lead, measuring 2.0 x 1.2 x 0.6 mm.

Crystals Feature Summary

• Provides stable oscillation at 32.768 kHz for accurate timekeeping
• Compact two-terminal surface-mount design for space-constrained PCBs
• Operates reliably across industrial temperature ranges

Crystals Applications

• Real-time clock circuits in consumer electronics
• Microcontroller system clocks
• Wearable device timing modules
• Low-power embedded systems

Crystals Procurement Notes

Verify the specific ordering suffix against the manufacturer's official datasheet to ensure correct load capacitance and tolerance specifications. Confirm that the package dimensions match the target footprint requirements. Request the latest fabrication drawing to validate pin configuration and soldering parameters before finalizing the bill of materials.

Crystals Selection Notes

Choose this component when a precise 32.768 kHz reference is required for time-based operations. Ensure the circuit design accommodates the specified 7 pF load capacitance to maintain frequency accuracy. Consider the thermal stability requirements if the operating environment exceeds standard commercial limits. Verify compatibility with the oscillator circuit's drive level constraints.

Crystals Part Context

This part belongs to the Siward XTL74 series of quartz crystals. The series offers various frequencies and packages tailored for different electronic applications. The XTL741 variant specifically targets small form-factor designs requiring reliable clock signals. It is commonly used alongside microcontrollers and real-time clock chips in portable devices.

Crystals Replacement Considerations

Cross-reference with other 32.768 kHz SMD crystals from manufacturers like Epson or Murata. Ensure substitute parts match the 7 pF load capacitance and ±20 ppm tolerance. Verify that the replacement component fits the 2.0 x 1.2 mm footprint and meets the same ESR specifications.