QT161S-24.576MDDQ-T

Overview

The QT161S-24.576MDDQ-T is a surface-mount quartz crystal manufactured by QST, designed for precise timing applications. It operates at a nominal frequency of 24.576 MHz with a load capacitance of 10 pF. The component features a 4-SMD, no-lead package with dimensions of 1.6 x 1.2 mm and a maximum seated height of 0.40 mm. Frequency tolerance and stability are specified at ±20 ppm within the operating temperature range of -20°C to +70°C.

Feature Summary

• Seam seal construction for reliable performance
• Surface mount design for automated assembly
• Compact footprint suitable for space-constrained PCBs

Applications

• Microcontroller clock sources
• Communication interface circuits
• Digital signal processing systems

Procurement Notes

Verify the manufacturer designation carefully, as the QT161S series is primarily associated with TXC Corporation. Confirm that the specific suffix DDQ-T aligns with the required ±20 ppm stability and 10 pF load capacitance specifications. Ensure the supplier provides valid datasheets confirming the 1.6x1.2mm package dimensions and RoHS compliance status before finalizing orders.

Selection Notes

Select this component when a 24.576 MHz reference is required for UART or SPI interfaces due to its standard baud rate divisibility. The ±20 ppm stability is sufficient for most digital communication protocols. Consider the 10 pF load capacitance requirement to ensure circuit resonance matches the crystal's specification without external trimming capacitors.

Part Context

This part belongs to the QT161S family of thin, low-profile crystals. The series offers various frequency options and stability grades, with the 'D' suffix typically indicating ±20 ppm stability over a commercial temperature range. These components are widely used in consumer electronics and industrial control modules requiring compact timing solutions.

Replacement Considerations

Direct substitutes include other manufacturers offering 1.6x1.2mm SMD crystals with identical 24.576 MHz frequency, 10 pF load capacitance, and ±20 ppm stability. Verify pin compatibility and thermal characteristics when cross-referencing with alternative brands.