TT-SMDC-4.9152-20-EXT-TR

Crystals Overview

The TT-SMDC-4.9152-20-EXT-TR is a parallel fundamental quartz crystal oscillator manufactured by Raltron Electronics, designed for surface-mount applications. It operates at a nominal frequency of 4.9152 MHz with a load capacitance of 20 pF and an equivalent series resistance (ESR) of 150 Ohms. The component features a frequency tolerance of ±50 ppm and utilizes a 4-SOJ package with a 9.40 mm pitch. This specific model includes extended lead options to facilitate wave soldering processes, ensuring robust mechanical attachment during assembly.

Crystals Feature Summary

• Supports wave soldering via extended leads for enhanced mechanical stability
• Optimized for integer division in UART communication protocols
• Utilizes low ESR design for efficient MCU driving

Crystals Applications

• UART serial communication interfaces
• Microprocessor clock sources
• Industrial gateway devices
• Low-power embedded systems

Crystals Procurement Notes

Verify the specific suffix 'EXT' confirms the presence of extended leads required for wave soldering compatibility. Ensure the 20 pF load capacitance matches the target microcontroller's internal or external circuit requirements. Confirm that the 4.9152 MHz frequency aligns with the system's baud rate generation needs to prevent timing errors.

Crystals Selection Notes

Select this component when wave soldering is mandated by the manufacturing process rather than standard reflow techniques. The 4.9152 MHz frequency is specifically chosen to eliminate fractional division errors in common serial baud rates. Consider the 150 Ohm ESR limit to ensure reliable oscillation startup within the connected microcontroller's drive capability specifications.

Crystals Part Context

This part belongs to the TT-SMDC series of low-profile microprocessor crystals from Raltron Electronics. The series is engineered for space-constrained designs while maintaining industrial-grade stability. The extended lead variant distinguishes itself from standard SMD counterparts by accommodating different assembly line configurations.

Crystals Replacement Considerations

Direct substitutes include the TT-SMDC-4.9152-20-TR for reflow-only applications or the TT-SMDC-4.9152-20-EXT-TR if lead extension is strictly required. Verify package dimensions and electrical parameters before swapping.