QTM325-12.288MBE-T

Overview

The QTM325-12.288MBE-T is a standard CMOS quartz oscillator manufactured by QST, designed for surface-mount applications. It operates at a nominal frequency of 12.288 MHz with a frequency stability of ±50 ppm across the industrial temperature range of -40°C to +85°C. The device utilizes a 3.3V supply voltage and features a 4-SMD, no-lead package with dimensions of 3.2mm x 2.5mm x 1.0mm. Key electrical parameters include a load capacitance of 15pF and a duty cycle of 55%. This component serves as a precise clock source for digital circuits requiring stable timing signals.

Feature Summary

• Provides stable clock generation using a quartz resonator base
• Supports surface-mount integration via compact SMD package
• Operates within standard industrial temperature specifications

Applications

• Digital system clock sources
• Microcontroller timing references
• Communication interface synchronization

Procurement Notes

Verify the specific suffix and manufacturer designation when sourcing replacements. Confirm that the required frequency tolerance and supply voltage match the design requirements. Ensure the package footprint aligns with the PCB layout constraints. Cross-reference the datasheet for any updates regarding pin configuration or thermal characteristics before finalizing procurement decisions.

Selection Notes

Select this component when a 12.288 MHz clock signal is required with ±50 ppm stability. Consider the 3.3V operating voltage and 4-pin SMD form factor for space-constrained designs. Evaluate the -40°C to +85°C temperature range against environmental conditions. Compare load capacitance requirements with the driving circuit to ensure proper oscillation startup and stability.

Part Context

This part belongs to the QTM325 series of standard CMOS oscillators from QST. The series offers various frequencies in a consistent 3.2x2.5mm footprint. These devices are engineered for high reliability in consumer electronics and industrial equipment. The QTM325 line provides a balance of performance and size for modern embedded applications.

Replacement Considerations

Compatible substitutes include other 12.288 MHz CMOS oscillators in 3.2x2.5mm packages with similar voltage and tolerance specs. Verify pinout compatibility and electrical parameters before substitution.