QTK252-32.768KBE-T

Overview

The QTK252-32.768KBE-T is a standard clock oscillator manufactured by QST Products, LLC. It operates at a nominal frequency of 32.768 kHz with a CMOS output type. The device supports a supply voltage of 3.3V and features an enable/disable control function. Frequency stability is rated at ±50 ppm. The component utilizes a 4-pin CSMD package with dimensions of 2.5mm x 2.0mm. It is designed for operation within a temperature range of -40°C to +85°C.

Feature Summary

• CMOS output interface compatible with digital logic circuits
• Integrated enable and disable control functionality
• Compact surface-mount design suitable for space-constrained applications

Applications

• Real-time clock timing sources
• Standard clock signal generation
• Embedded system timing references

Procurement Notes

Verify the manufacturer designation carefully, as the model number prefix may appear associated with TXC Corporation in some distributor listings while the official datasheet identifies QST Products, LLC as the producer. Confirm the specific package outline and pin configuration against the official QST documentation to ensure compatibility with the target PCB footprint. Ensure the required operating temperature range aligns with the specified -40°C to +85°C rating for the intended environment.

Selection Notes

Select this component when a low-frequency, high-stability timing source is required for real-time clock or general system synchronization tasks. The CMOS output level simplifies integration into microcontroller-based designs without additional buffering. Consider the 3.3V supply requirement and the enable/disable feature for power management strategies. The small 2.5x2.0mm package is advantageous for dense board layouts where space is limited compared to larger through-hole alternatives.

Part Context

This oscillator belongs to the QTK series of surface-mount crystal oscillators from QST Products. These components are engineered to provide precise timing signals for portable electronics and industrial equipment. The 32.768 kHz frequency is a standard choice for dividing down to one-second intervals in timekeeping applications. The series offers various frequency options and package sizes to accommodate different design constraints.

Replacement Considerations

Direct substitutes include other 32.768 kHz CMOS oscillators in similar SMD packages with matching voltage and stability specifications. Verify that any replacement part maintains the same enable/disable pinout and electrical characteristics to ensure seamless integration without circuit modification.