QT161S-26.000MAHB-T

Overview

The QT161S-26.000MAHB-T is a surface-mount crystal oscillator manufactured by QST, operating at a nominal frequency of 26 MHz. It features a compact 4-SMD, no-lead package with dimensions of 1.6 x 1.2 mm and a maximum height of 0.40 mm. The component exhibits a frequency stability of ±30 ppm over the temperature range of -40°C to +85°C. Key electrical parameters include a load capacitance of 6 pF and an equivalent series resistance (ESR) of 80 ohms. This device is designed for precise timing applications requiring small form factors.

Feature Summary

• Compact 1.6x1.2mm surface-mount footprint suitable for space-constrained designs
• Wide operating temperature range from -40°C to +85°C ensuring reliability in harsh environments
• Low equivalent series resistance for efficient circuit integration
• Stable frequency performance with ±30 ppm tolerance across the specified temperature range

Applications

• Embedded communication systems requiring stable clock signals
• Microcontroller unit (MCU) clock sources for embedded processing
• Wireless modules and Bluetooth-enabled devices
• Industrial control boards and sensor interfaces

Procurement Notes

Verify the complete part number including suffixes such as 'T' for tape-and-reel packaging configuration. Confirm that the required frequency stability matches the ±30 ppm specification for your application environment. Ensure compatibility with the 6 pF load capacitance in your circuit design. Check for any specific handling requirements due to the small SMD package size during assembly processes.

Selection Notes

Select this component when a 26 MHz reference signal is required within a 1.6x1.2mm envelope. Consider the ±30 ppm stability sufficient for standard digital logic and communication interfaces. Evaluate the 80 ohm ESR against your oscillator circuit's drive level constraints. Compare against other variants in the QT161S family if different temperature ranges or load capacitances are needed.

Part Context

This part belongs to the QT161S series of thin, low-profile crystals from QST. The series offers various frequencies and stability grades, identified by suffix codes like H for -40°C to +85°C range. Similar parts include QT161S-25.000MAHB-T for 25 MHz operation and QT161S-32.000MAHV-T for 32 MHz with different stability ratings. The series is widely used in consumer electronics and industrial IoT devices.

Replacement Considerations

Direct substitutes must match the 26 MHz frequency, 1.6x1.2mm package, and ±30 ppm stability. Verify load capacitance compatibility, typically 6 pF for this series. Cross-reference with other manufacturers offering similar thin SMD crystals if QST supply is limited. Ensure the replacement supports the same operating temperature range of -40°C to +85°C.