QTM750-4.000MBA-T

Overview

The QTM750-4.000MBA-T is a standard CMOS quartz oscillator manufactured by QST, designed for surface-mount applications. It operates at a nominal frequency of 4.000 MHz with a supply voltage of 3.3V DC. The device features a compact 4-SMD, no-lead package measuring 7.0mm x 5.0mm x 1.3mm. It supports an enable/disable control function and maintains a frequency stability of ±50ppm across the industrial temperature range of -40°C to +85°C. The unit is RoHS compliant and lead-free.

Feature Summary

• CMOS output interface compatible with standard digital logic
• Integrated enable/disable control functionality
• Industrial temperature range operation from -40°C to +85°C
• Compact 4-SMD surface-mount footprint

Applications

• General-purpose clock signal generation in embedded systems
• Timing reference for microcontrollers and processors
• Communication interface synchronization circuits
• Consumer electronics requiring precise timing sources

Procurement Notes

Verify the specific suffix 'B' against official QST documentation to confirm exact tolerance and load capacitance specifications. Ensure the ordering part number matches the required frequency stability and operating voltage. Confirm RoHS compliance status through the manufacturer's current product release notes before final procurement decisions.

Selection Notes

Select this component when a 4MHz CMOS clock source is required in a 7x5mm SMD package. Verify that the system design supports 3.3V logic levels and utilizes enable/disable control if power management is needed. Ensure the application environment remains within the specified -40°C to +85°C operational range for guaranteed performance.

Part Context

This oscillator belongs to the QTM750 series of standard crystal oscillators from QST. The series offers various frequencies and packages, providing reliable timing solutions for commercial and industrial electronics. The QTM750 line is characterized by low phase noise and stable performance across wide temperature variations.

Replacement Considerations

Direct substitutes include other QTM750 series variants with matching pinouts and electrical characteristics, such as QTM750-4.000MBE-T or QTM750-4.000MDE-T, provided they meet the same frequency, voltage, and package requirements.