QT161S-26.000MADV-T

Overview

The QT161S-26.000MADV-T is a 26 MHz crystal oscillator manufactured by QST, designed for surface-mount applications. It operates within an extended temperature range of -40°C to +85°C and maintains a frequency stability of ±30 ppm across this span. The component features a load capacitance of 8 pF and an equivalent series resistance (ESR) of 80 Ohms maximum. Packaged in a compact 4-SMD, No Lead form factor, it provides reliable clock generation for electronic circuits requiring precise timing synchronization under varying thermal conditions.

Feature Summary

• Provides stable frequency output with ±30 ppm tolerance over the full operating temperature range
• Utilizes a low-profile 4-SMD no-lead package for automated surface-mount assembly
• Engineered for high reliability with specified ESR limits ensuring consistent oscillation performance

Applications

• Clock signal generation for microcontrollers and digital logic circuits
• Timing reference sources for communication interfaces such as UART and SPI
• Frequency control in consumer electronics and industrial control systems

Procurement Notes

Verify the specific suffix codes against official QST documentation to confirm temperature range and stability specifications. Ensure the ordering part number matches the required load capacitance and package dimensions. Cross-reference manufacturer datasheets for RoHS compliance and tape-and-reel packaging details before finalizing procurement orders.

Selection Notes

Select this component when a 26 MHz reference is required with ±30 ppm stability across -40°C to +85°C. Consider the 8 pF load capacitance compatibility with the host circuit's internal capacitance. Evaluate the 4-SMD footprint constraints against PCB layout requirements and ensure the 80 Ohm ESR limit aligns with the oscillator circuit design parameters.

Part Context

This crystal belongs to QST's QT161S series of surface-mount crystals. The series offers various frequency options and stability grades tailored for different environmental and performance needs. The 26.000 MHz variant specifically targets applications needing standard clock frequencies with robust thermal stability, fitting into modern compact electronic designs.

Replacement Considerations

Direct substitutes must match the 26 MHz frequency, 4-SMD package, 8 pF load capacitance, and ±30 ppm stability over -40°C to +85°C. Verify equivalent ESR characteristics and drive level specifications to ensure circuit compatibility without modification.