QT532S-19.200MEEQ-T

Overview

The QT532S-19.200MEEQ-T is a surface-mount quartz crystal resonator manufactured by QST, operating at a fundamental frequency of 19.2 MHz. It features a load capacitance of 10 pF and an equivalent series resistance (ESR) of 40 Ohms. The component exhibits a frequency stability and tolerance of ±10 ppm at 25°C. Designed for robust performance, it supports an operating temperature range from -20°C to +70°C. The physical package is a 4-SMD, no-lead type with body dimensions of 5.0 mm x 3.2 mm x 0.9 mm.

Feature Summary

• High accuracy frequency stability of ±10 ppm ensures precise timing signals.
• Low equivalent series resistance of 40 Ohms facilitates efficient circuit operation.
• Compact 4-SMD no-lead package design suitable for automated surface mount assembly.

Applications

• Clock generation in digital signal processing systems
• Timing references for microcontroller units
• Communication interface synchronization circuits

Procurement Notes

Verify the manufacturer designation is explicitly QST, as similar part numbers exist across different brands like TXC. Confirm the ESR specification is 40 Ohms, distinguishing it from other variants that may have higher resistance values. Ensure the package dimensions match the 5x3.2mm footprint required by the target PCB layout. Check RoHS compliance status against current regulatory requirements for the intended market.

Selection Notes

Select this component when a 19.2 MHz fundamental mode crystal is required with tight ±10 ppm stability. The 40 Ohm ESR is lower than many standard alternatives, making it suitable for low-power oscillator designs. The 5x3.2mm package offers a larger footprint than smaller 2x1.6mm crystals, which may aid in thermal management or mechanical reliability during reflow soldering processes.

Part Context

This part belongs to the QT532S series of high-accuracy MHz quartz crystals from QST. It is functionally similar to other 19.2 MHz SMD crystals but distinguished by its specific 40 Ohm ESR and 5x3.2mm package size. It serves as a direct alternative to larger footprint crystals where space permits, offering improved electrical characteristics compared to basic generic crystals.

Replacement Considerations

The TXC 8Z-19.200MEEQ-T is listed as a similar replacement. However, verify that the 100 Ohm ESR of the TXC unit is acceptable for the oscillator circuit, as it differs significantly from the 40 Ohm ESR of the QST part. Package dimensions also differ, requiring PCB footprint verification before substitution.