QTT161-26.000MDG-T

Overview

The QTT161-26.000MDG-T is a Temperature Compensated Crystal Oscillator (TCXO) manufactured by QST, operating at a nominal frequency of 26 MHz. It utilizes a clipped sine wave output format and functions with a supply voltage of 1.8V. The device is housed in a compact 4-SMD, No Lead surface-mount package. It draws a maximum current of 2mA during operation. This component is designed for applications requiring stable timing signals within low-power constraints.

Feature Summary

• Temperature compensated crystal oscillator design ensuring frequency stability across varying thermal conditions
• Clipped sine wave output signal generation suitable for digital logic interfacing
• Low power consumption profile with maximum current draw of 2mA at 1.8V supply
• Compact surface-mount packaging optimized for space-constrained circuit board layouts

Applications

• Timing reference sources for field-programmable gate arrays (FPGAs)
• Clock generation modules in portable electronic devices
• Synchronization circuits in communication subsystems
• Embedded systems requiring precise frequency control

Procurement Notes

Verify the specific output waveform and voltage requirements against your system design before procurement. Confirm that the 1.8V supply rail can support the maximum 2mA current draw without significant voltage droop. Ensure the PCB footprint matches the 4-SMD, No Lead package dimensions to prevent assembly issues. Cross-reference the manufacturer's datasheet for any recent updates regarding pin configurations or recommended decoupling capacitor values.

Selection Notes

Select this component when a stable 26 MHz clock source is required in a low-voltage environment. The clipped sine output is appropriate for direct connection to CMOS or TTL inputs without additional buffering. Consider the thermal compensation capabilities if the operating environment experiences significant temperature fluctuations. Verify compatibility with the 1.8V logic levels used in the target application circuit.

Part Context

This part belongs to the QTT161 series of oscillators from QST. The series includes various frequencies and voltage options, such as 3.3V variants like the QTS750C series. The QTT161 model specifically targets low-voltage applications, distinguishing it from higher voltage counterparts. The suffix indicates the specific frequency and package type within the product line.

Replacement Considerations

Direct substitutes may include other 26 MHz TCXOs in 4-SMD packages with compatible 1.8V operation. Check for equivalent phase noise specifications and current consumption profiles. Ensure the replacement part supports clipped sine output if direct logic interfacing is required. Verify that the thermal compensation range meets the application's environmental requirements.