QT325G-48.000MAHE-T

Overview

The QT325G-48.000MAHE-T is a surface-mount quartz crystal resonator manufactured by QST, designed for precision timing applications. It operates at a fundamental frequency of 48 MHz with a load capacitance of 12 pF and an equivalent series resistance (ESR) of 60 Ohms. The component offers a frequency stability of ±30 ppm within the operating temperature range of -20°C to +70°C. Housed in a compact 4-SMD, No Lead package measuring 3.20mm x 2.50mm with a maximum seated height of 0.90mm, it supports standard reflow soldering processes. The device complies with RoHS3 standards and features Moisture Sensitivity Level 1.

Feature Summary

• Fundamental mode operation ensures stable oscillation characteristics for digital clock signals.
• Compact 4-SMD no-lead package facilitates automated surface-mount assembly.
• RoHS3 compliant construction supports environmentally regulated manufacturing environments.

Applications

• Microcontroller unit (MCU) clock sources
• Communication interface timing circuits
• Digital signal processing systems

Procurement Notes

Verify that the ordering suffix HE-T corresponds to the specific ±30 ppm stability and -20°C to +70°C temperature range requirements. Confirm that the 4-SMD footprint matches the PCB land pattern dimensions of 3.20mm x 2.50mm. Ensure the design accounts for the 12pF load capacitance and 60 Ohm ESR specifications to guarantee oscillator circuit stability. Cross-reference the manufacturer's latest datasheet for any updates on recommended soldering profiles or storage conditions prior to procurement.

Selection Notes

Select this component when a 48 MHz fundamental frequency is required with moderate stability constraints. The ±30 ppm tolerance is suitable for general-purpose digital logic and communication interfaces where tight phase noise is not critical. Consider the 12pF load capacitance compatibility with the target oscillator circuit. The -20°C to +70°C range fits standard commercial industrial applications. Evaluate the 60 Ohm ESR against the oscillator driver strength to prevent over-driving the crystal.

Part Context

This part belongs to the QT325G series of ceramic crystals from QST, which are characterized by their small form factor and reliability. The series provides various frequency options and stability grades tailored for consumer electronics and embedded systems. The QT325G line emphasizes cost-effective timing solutions for mass-produced devices requiring precise clock generation without the complexity of active oscillators.

Replacement Considerations

The QT325G-48.000MAAE-T from QST is listed as a parameter-equivalent substitute. Verify that the alternative maintains identical electrical parameters including 48 MHz frequency, 12pF load capacitance, 60 Ohm ESR, and ±30 ppm stability. Ensure the physical package dimensions and pin configuration are compatible with the existing footprint.