TT-SMDC-7.3728-S-TR

Crystals Overview

The TT-SMDC-7.3728-S-TR is a surface-mount microprocessor crystal resonator manufactured by Raltron Electronics. It operates at a nominal frequency of 7.3728 MHz using parallel fundamental mode oscillation. The device features a frequency tolerance of ±50 ppm at 25°C and a total frequency stability of ±50 ppm across the operating temperature range of -10°C to +60°C. It has a load capacitance of 20 pF, an equivalent series resistance (ESR) of 100 Ohms maximum, and a drive level of 10 μW typical with a maximum of 100 μW. The component is housed in a 4-SOJ package with a 9.40 mm pitch.

Crystals Feature Summary

• Provides precise clock timing for microprocessors via parallel fundamental oscillation
• Optimized for UART serial communication applications due to integer-compatible frequency division
• Designed for standard surface-mount technology assembly processes

Crystals Applications

• Microprocessor clock sources
• UART serial communication interfaces
• Industrial gateway devices
• IoT modules requiring stable low-frequency timing

Crystals Procurement Notes

Verify that the specific order suffix matches the required package dimensions and loading conditions. Confirm the operating temperature range aligns with the intended environmental conditions, as this model is specified for commercial ranges. Ensure compatibility with standard SMT reflow profiles and check for RoHS compliance documentation if required for regulatory submission.

Crystals Selection Notes

Select this component when a 7.3728 MHz frequency is required to minimize baud rate errors in serial communications. Consider the 20 pF load capacitance for PCB layout matching calculations. Evaluate the -10°C to +60°C temperature range against project requirements; industrial grade variants may be necessary for wider thermal environments. Verify ESR limits match the driving circuit capabilities of the target microcontroller.

Crystals Part Context

This part belongs to the TT-SMDC series of surface-mount crystals from Raltron Electronics. These components are designed as direct replacements for through-hole crystals in compact electronic designs. The series supports various frequencies optimized for common communication standards, providing a balance between performance and cost for consumer and light industrial electronics.

Crystals Replacement Considerations

Direct substitutes include other 7.3728 MHz SMD crystals with identical 4-SOJ packaging and 20 pF load capacitance. Ensure replacement parts meet the same ±50 ppm stability and 100 Ω ESR specifications. Verify that alternative manufacturers offer compatible reflow soldering characteristics and MSL ratings.