QT325G-19.200MAHJ-T

Overview

The QT325G-19.200MAHJ-T is a surface-mount crystal oscillator manufactured by QST, operating at a nominal frequency of 19.2 MHz. It features a load capacitance of 18 pF and an equivalent series resistance (ESR) of 60 Ohms. The component exhibits a frequency tolerance and stability of ±30 ppm across the specified temperature range. Physical dimensions are 3.2 mm in length, 2.5 mm in width, with a maximum seated height of 0.90 mm. It utilizes a four-terminal no-lead SMD package designed for automated surface-mount assembly processes.

Feature Summary

• Provides stable timing reference at 19.2 MHz with ±30 ppm frequency stability
• Compact 3.2 x 2.5 mm surface-mount footprint for space-constrained designs
• Low profile construction with 0.90 mm maximum seated height
• Designed for high-volume automated surface-mount technology (SMT) placement

Applications

• Clock generation for microcontrollers and digital signal processors
• Timing references for communication interface circuits
• Frequency standards for embedded control systems
• Oscillator circuits in consumer electronic devices

Procurement Notes

Verify the specific suffix codes against official QST documentation to ensure alignment with required temperature ranges and stability specifications. Confirm that the 18 pF load capacitance matches the target circuit design requirements. Ensure compatibility with standard reflow soldering profiles for leadless surface-mount packages to maintain component integrity during assembly.

Selection Notes

Select this component when a 19.2 MHz timing source is required with moderate stability needs. The 18 pF load capacitance must align with the host oscillator circuit's input capacitance. Consider the ±30 ppm tolerance for applications where precise frequency accuracy is critical but extreme stability is not mandatory. Evaluate the physical size constraints against available board real estate.

Part Context

This part belongs to the QT325G series of quartz crystals from QST, which offers various frequency options and stability grades within a standardized small outline package. The series supports diverse electronic applications requiring reliable clock signals. Different suffixes indicate variations in temperature range and frequency tolerance, allowing designers to balance performance requirements with cost considerations.

Replacement Considerations

Direct substitutes include other manufacturers' 19.2 MHz crystals in identical 3.2x2.5mm packages with matching 18pF load capacitance and similar ESR values. Verify that alternative components meet the same ±30 ppm stability specification and operate within the required temperature range. Ensure pinout compatibility and solderability characteristics match the original design intent.