QT161S-40.000MAHQ-T

Overview

The QT161S-40.000MAHQ-T is a surface-mount quartz crystal oscillator manufactured by QST Corporation. It operates at a fundamental frequency of 40 MHz with a load capacitance of 10 pF. The component features a compact 1.6 x 1.2 mm package and exhibits a frequency stability of ±30 ppm across the -40°C to +85°C temperature range. This device utilizes a seam seal construction for reliable performance in electronic circuits requiring precise timing signals.

Feature Summary

• Seam seal construction for environmental reliability
• Compact 1.6 x 1.2 mm surface mount footprint
• Wide operating temperature range from -40°C to +85°C

Applications

• Precision timing circuits in embedded systems
• Clock generation for microcontrollers and processors
• Communication modules requiring stable carrier frequencies

Procurement Notes

Verify the specific suffix HQ against official QST documentation to confirm the ±30 ppm stability over the -40°C to +85°C range. Ensure the load capacitance requirement matches the circuit design, as this unit specifies 10 pF. Cross-reference the manufacturer part number to distinguish between similar variants within the QT161S series that may offer different tolerance or temperature specifications.

Selection Notes

Select this component when a small form factor is required alongside wide industrial temperature operation. The 40 MHz frequency suits applications needing standard clock rates without harmonic multiplication. Verify that the host circuit supports a 10 pF load capacitance to maintain the specified ±30 ppm accuracy. Consider alternative suffixes if tighter tolerance or different temperature ranges are necessary for the target environment.

Part Context

This part belongs to the QT161S series of quartz crystals from QST Corporation. The series offers various frequency options and stability grades defined by alphanumeric suffixes. The QT161S designation indicates a specific physical size and mounting style common in modern consumer electronics and industrial control boards where space constraints are critical.

Replacement Considerations

Direct substitutes include other QT161S variants with identical 40 MHz frequency and 10 pF load capacitance but potentially different stability ratings. Check datasheets for equivalent parts from other manufacturers offering 1.6x1.2mm SMD crystals with ±30 ppm stability over -40°C to +85°C.