QTM252J-28.63636MBJ-T

Overview

The QTM252J-28.63636MBJ-T is a standard CMOS crystal oscillator manufactured by QST Products, LLC. It operates at a fixed frequency of 28.63636 MHz with a stability tolerance of ±50 ppm. The device functions on a 3.3V supply voltage and features an enable/disable control input for power management. It is housed in a compact 4-SMD, no-lead package measuring 2.5mm x 2.0mm. The component supports an industrial temperature range from -40°C to +105°C, ensuring reliable performance in demanding electronic applications requiring precise clock signals.

Feature Summary

• Integrated CMOS output driver for direct logic interface compatibility
• Enable/Disable pin functionality for active power management
• Compact surface-mount footprint suitable for space-constrained designs
• Industrial-grade temperature rating for broad environmental operation

Applications

• Digital signal processing systems requiring precise timing references
• Communication equipment utilizing serial data transmission protocols
• Embedded microcontroller clock sources in industrial control units
• Test and measurement instruments needing stable frequency generation

Procurement Notes

Verify the specific suffix 'MBJ-T' against the manufacturer's current datasheet to confirm pinout configuration and electrical characteristics match your design requirements. Ensure that the 3.3V supply voltage aligns with your system's power rails. Confirm the enable/disable logic levels are compatible with your controlling microcontroller outputs. Check for any recent revisions to the mechanical drawing regarding the 4-SMD package dimensions to ensure PCB footprint accuracy.

Selection Notes

Select this component when a low-jitter CMOS oscillator is required for high-speed digital interfaces. The ±50 ppm stability is suitable for most synchronous communication standards. Consider the 2.5x2.0mm package size if board real estate is limited. Verify that the operating temperature range of -40°C to +105°C meets the environmental conditions of the final application. Compare against other frequencies in the QTM252J series if different clock speeds are needed.

Part Context

This part belongs to the QTM252J series of surface-mount quartz oscillators from QST Products, LLC. The series offers various frequency options within a standardized 4-SMD package. These oscillators are designed to replace larger through-hole components or less stable RC oscillators. The model number indicates the specific frequency and package type, providing a standardized solution for clock generation in consumer, industrial, and telecommunications electronics.

Replacement Considerations

Direct replacements include other QTM252J variants with identical package and electrical specifications but different frequencies, such as QTM252J-26.000MBJ-T or QTM252J-48.000MBJ-T, provided the system clock requirement changes. Cross-brand equivalents must match the 28.63636 MHz frequency, 3.3V supply, CMOS output, and 4-SMD 2.5x2.0mm form factor. Verify that substitute parts meet the same ±50 ppm stability and industrial temperature range specifications.