QTM325-28.63636MBE-T

Overview

The QTM325-28.63636MBE-T is a CMOS standard crystal oscillator (XO) manufactured by QST, operating at a nominal frequency of 28.63636 MHz. It functions with a 3.3V supply voltage and features an enable/disable control function. The device utilizes a basic crystal resonator and is housed in a compact 4-SMD, no-lead package measuring 3.20mm x 2.50mm x 1.10mm. It supports surface mount installation and operates within a temperature range of -40°C to 85°C.

Feature Summary

• Integrates enable and disable functionality for power management control
• Utilizes a standard CMOS output interface for digital logic compatibility
• Constructed with a fundamental crystal resonator for stable timing

Applications

• Embedded systems requiring precise clock synchronization
• Consumer electronics utilizing standard CMOS logic interfaces
• Industrial control modules operating in extended temperature environments

Procurement Notes

Verify the specific suffix 'T' against official QST documentation to confirm tape and reel packaging specifications. Ensure the part number matches the exact frequency tolerance and load capacitance requirements for your circuit design. Cross-reference the manufacturer's latest datasheet to confirm RoHS compliance status and lead-free soldering recommendations prior to ordering.

Selection Notes

Select this component when a fixed 28.63636 MHz frequency is required for CMOS-based digital circuits. Consider the 4-SMD no-lead package for space-constrained PCB layouts. Evaluate the ±50ppm stability specification against system jitter requirements. Confirm that the 3.3V operating voltage aligns with the target system's power rails before integration.

Part Context

This oscillator belongs to the QTM325 series from QST, designed for surface-mount applications. The series provides various frequency options within a standardized 3.2mm x 2.5mm footprint. It serves as a timing reference solution for general-purpose electronic devices, offering a balance between performance and physical size compared to larger through-hole alternatives.

Replacement Considerations

Direct substitutes include other 28.63636 MHz CMOS oscillators in 4-SMD packages from manufacturers like TXC or Epson. Verify pinout compatibility and electrical parameters such as current consumption and startup time. Ensure the replacement maintains the same enable/disable logic polarity if active control is utilized in the design.