QTT252-38.400MDG-T

Overview

The QTT252-38.400MDG-T is a temperature-compensated crystal oscillator (TCXO) manufactured by QST Products, LLC. It operates at a nominal frequency of 38.4 MHz with a clipped sine wave output format. The device utilizes a 4-SMD, No Lead package measuring 2.5mm x 2.0mm x 0.8mm. It functions within a supply voltage range of 1.8V to 3.3V and supports an operating temperature range of -30°C to +85°C. Frequency stability is specified at ±0.5 ppm over the full temperature range.

Feature Summary

• Integrates voltage-controlled temperature compensation for high frequency stability across wide thermal variations.
• Delivers a clipped sine wave output signal suitable for digital clocking applications.
• Utilizes a compact surface-mount ceramic package designed for automated assembly processes.

Applications

• High-precision timing references in portable electronic devices requiring low power consumption.
• Clock generation sources for communication modules and network interface cards.
• Embedded systems demanding stable frequency control under varying environmental temperatures.

Procurement Notes

Verify the specific manufacturer designation, as this component appears in catalogs from both QST Products, LLC and TXC Corporation. Confirm that the ordering suffix matches the required voltage and stability specifications. Ensure compatibility with the target PCB footprint and reflow soldering profiles defined in the official datasheet. Cross-reference part numbers carefully to avoid confusion between similar series variants.

Selection Notes

Select this component when a small form factor TCXO is required for applications needing ±0.5 ppm stability over a -30°C to +85°C range. Compare against standard crystals if temperature compensation is unnecessary. Evaluate power consumption requirements against the 1.8V to 3.3V supply options. Consider alternative packages if board space constraints differ from the 2.5x2.0mm dimension.

Part Context

This oscillator belongs to the QTT252 series, which features quartz-based temperature compensation in a miniature SMD package. The series is designed for consumer electronics and industrial applications where size and stability are critical. It complements other oscillators in the lineup by offering a balance of performance and physical compactness for modern circuit designs.

Replacement Considerations

Public confirmed substitute part numbers include QTT252-38.400MBN-T and QTT252-38.400MBS-T. Verify that replacement units match the exact frequency, output waveform, and stability specifications before integration into existing designs.