QTM252J-12.000MBJ-T

Overview

The QTM252J-12.000MBJ-T is a standard CMOS quartz oscillator manufactured by QST, housed in a compact 4-SMD, No Lead surface-mount package with dimensions of 2.5mm x 2.0mm. It operates at a nominal frequency of 12 MHz and requires a supply voltage of 3.3V. The device provides a maximum supply current of 22mA and maintains a frequency stability of ±50ppm across an extended operating temperature range of -40°C to +105°C. This component supports enable/disable functionality for power management.

Feature Summary

• Low jitter and phase noise performance suitable for precision timing applications
• Integrated enable/disable control function for efficient power management
• CMOS output signal compatible with digital logic interfaces

Applications

• High-speed data communication systems requiring stable clock sources
• Embedded computing platforms and microcontroller circuits
• Industrial equipment with wide temperature operational requirements

Procurement Notes

Verify the specific suffix 'MBJ' against official QST documentation to confirm the exact voltage level and temperature grade, as ordering codes define functional parameters. Ensure the target application supports 3.3V logic levels and the specified -40°C to +105°C thermal range. Confirm that the 4-SMD no-lead footprint matches the PCB land pattern design to prevent assembly defects.

Selection Notes

Select this component when a small form factor oscillator with low jitter is required for 12 MHz reference signals. The 3.3V supply requirement dictates compatibility with modern low-voltage digital systems. Consider the extended industrial temperature range (-40°C to +105°C) if the deployment environment exceeds standard commercial limits. Verify that the CMOS output swing meets the input threshold requirements of the downstream clock receiver.

Part Context

This part belongs to the QTM252J series of surface-mount quartz oscillators from QST. The series is characterized by its compact 2.5x2.0mm footprint and low phase noise specifications. The 'J' suffix typically denotes specific electrical characteristics or packaging variations within the family, distinguishing it from other variants like the QTM252 series which may differ in voltage or temperature ratings.

Replacement Considerations

Direct substitutes include other 12MHz 3.3V CMOS oscillators in 4-SMD packages with similar jitter specs, such as those from TXC (e.g., QTM252J-12.000MDJ-T). Verify pinout compatibility and electrical parameter equivalence before substitution.