QT49S-32.000MBBK-T

Overview

The QT49S-32.000MBBK-T is a surface-mount crystal oscillator manufactured by QST, operating at a nominal frequency of 32 MHz. This component utilizes an HC-49/US metal can package and features resistance welding for enhanced reliability. It is designed with a load capacitance of 20 pF and exhibits a series resistance of 80 Ohms. The unit offers a frequency tolerance of ±50 ppm at 25°C and complies with RoHS standards, ensuring it is lead-free.

Feature Summary

• Resistance welded construction within a metal can SMD package for durability
• RoHS compliant and lead-free manufacturing process
• HC-49/US form factor suitable for surface mount applications

Applications

• Television systems
• Set-top boxes
• Cable modems
• Microprocessor timing circuits
• Computer peripherals

Procurement Notes

Verify the specific ordering suffix to confirm frequency tolerance and stability specifications, as variations exist within the QT49S family. Ensure compatibility with the target PCB footprint for the HC-49/US SMD package. Confirm that the 20pF load capacitance aligns with the host circuit design requirements before finalizing procurement orders.

Selection Notes

Select this component when a robust, surface-mount crystal with proven resistance-welded construction is required for consumer electronics. The HC-49/US SMD profile offers a balance between traditional performance and modern assembly needs. Consider the ±50 ppm tolerance sufficient for general-purpose clocking in TVs and modems where extreme precision is not critical.

Part Context

This part belongs to the QT49S series from QST, which covers frequencies ranging from 3.2 MHz to 90 MHz. The series includes various tolerance options denoted by middle letters in the part number, such as 'B' for ±50 ppm. It serves as a direct surface-mount alternative to through-hole crystals, maintaining similar electrical characteristics while adapting to automated assembly processes.

Replacement Considerations

Direct substitutes include other QT49S variants with matching 32 MHz frequency and HC-49/US SMD packages. Cross-reference models from other manufacturers offering identical 20pF load capacitance and 80 Ohm ESR. Verify that any replacement maintains the same resistance-welded construction and RoHS compliance status.

FAQ

What is the package type for the QT49S-32.000MBBK-T?

It uses an HC-49/US surface-mount metal can package.

Does this component meet environmental standards?

Yes, it is RoHS compliant and lead-free.