QT161S-20.000MAAV-T

Overview

The QT161S-20.000MAAV-T is a quartz crystal oscillator manufactured by QST, operating at a nominal frequency of 20 MHz. It features a frequency tolerance and stability of ±30 ppm and an equivalent series resistance (ESR) of 100 Ohms. The component utilizes a load capacitance of 8 pF and is housed in a compact 4-SMD, No Lead package with dimensions of 1.6 mm x 1.2 mm x 0.35 mm. Designed for surface mount technology, it supports standard reflow soldering processes.

Feature Summary

• Compact surface-mount design suitable for space-constrained PCB layouts
• Seam-sealed construction ensuring environmental protection
• Standardized 4-terminal no-lead package format

Applications

• Microcontroller clock sources
• Communication module timing references
• Digital signal processing circuits

Procurement Notes

Verify the manufacturer designation carefully, as this specific part number is associated with QST while similar variants exist under TXC branding. Confirm the exact package dimensions and electrical parameters against the official datasheet prior to integration. Ensure compatibility with the target circuit's load capacitance requirements and operating temperature range specifications.

Selection Notes

Select this component when a 20 MHz reference signal is required within a minimal footprint constraint. The ±30 ppm stability suits general-purpose digital applications rather than high-precision timing needs. Evaluate the 100 Ohm ESR against the oscillator circuit's drive level limitations to prevent over-driving the crystal element during operation.

Part Context

This component belongs to the QT161S series of seam-sealed quartz crystals. The series offers various frequency options within a standardized 1.6x1.2 mm form factor. It serves as a direct replacement for legacy through-hole crystals where board space is limited, providing a drop-in solution for modern SMT assembly lines without requiring mechanical redesign.

Replacement Considerations

Direct substitutes include other 20 MHz crystals in identical 1.6x1.2 mm packages with matching 8 pF load capacitance. Verify that alternative parts maintain comparable ESR values and frequency stability ratings to ensure circuit performance parity.