RT4115-32.768-12.5-TR

Crystals Overview

The RT4115-32.768-12.5-TR is a parallel fundamental quartz crystal manufactured by Raltron Electronics, designed for precise timekeeping applications. It operates at a nominal frequency of 32.768 kHz with a load capacitance of 12.5 pF and a maximum equivalent series resistance (ESR) of 65 kΩ. The component features a compact surface-mount package measuring 4.1 mm in length and 1.5 mm in width, utilizing a two-pin no-lead SMD configuration. It supports a frequency tolerance of ±20 ppm at 25°C and functions within an industrial temperature range of -40°C to +85°C. The device is optimized for low-power real-time clock circuits.

Crystals Feature Summary

• Compact 4.1 x 1.5 mm surface-mount footprint suitable for high-density PCB layouts
• Low drive level capability of 0.5 μW max for energy-efficient operation
• Industrial-grade thermal stability across -40°C to +85°C operating range
• Robust mechanical performance with verified drop resistance up to 75 cm

Crystals Applications

• Real-time clock (RTC) circuits in wearable devices
• Low-power standby timing for consumer electronics
• Calendar and clock modules in industrial sensors
• Microcontroller-based systems requiring precise 1 Hz division

Crystals Procurement Notes

Verify the specific suffix codes against the official Raltron datasheet to ensure correct load capacitance and tolerance specifications. Confirm that the ordering part number matches the required 12.5 pF load and ±20 ppm tolerance. Ensure compatibility with standard lead-free reflow soldering profiles as defined by IPC/JEDEC J-STD-020 standards. Check moisture sensitivity level classifications prior to assembly to determine storage and handling requirements.

Crystals Selection Notes

Select this component when board space is limited due to its small 4.1 x 1.5 mm dimensions. Choose based on the microcontroller's required load capacitance; mismatched values can cause significant frequency deviations. Consider the ESR limit of 65 kΩ to ensure reliable oscillation start-up in low-drive RTC peripherals. Evaluate the ±20 ppm tolerance against long-term aging requirements, noting the specified annual aging rate of ±3 ppm.

Crystals Part Context

This model belongs to the RT4115 series of tuning fork crystals from Raltron Electronics, specifically engineered for compact industrial and consumer applications. It serves as a direct replacement for larger traditional through-hole crystals where space constraints are critical. The series is characterized by its ability to maintain frequency stability under varying thermal conditions while supporting low-power consumption designs typical in battery-operated portable devices.

Crystals Replacement Considerations

Direct substitutes include other 32.768 kHz crystals with identical 4.1 x 1.5 mm footprints, 12.5 pF load capacitance, and comparable ESR limits. Verify pinout compatibility and mounting orientation when swapping manufacturers. Ensure alternative parts meet the same -40°C to +85°C industrial temperature rating and RoHS compliance standards.