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Product Detailed Parameters
- Description：HC49 , +/-30PPM , +/-30PPM (-20
- Series：QT49S
- Mfr：QST
- Package：Tape & Reel (TR)
- Type：MHz Crystal
- Frequency：22 MHz
- Frequency Stability：±30ppm
- Frequency Tolerance：±30ppm
- Load Capacitance：12pF
- ESR (Equivalent Series Resistance)：30 Ohms
- Operating Mode：Fundamental
- Operating Temperature：-20°C ~ 70°C
- Ratings：-
- Mounting Type：Surface Mount
- Package / Case：HC-49/US
- Size / Dimension：0.449" L x 0.189" W (11.40mm x 4.80mm)
- Height - Seated (Max)：-
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Overview
The QT49S-22.000MAAE-T is a surface-mount crystal oscillator manufactured by QST Corporation, designed for digital applications within the 3.2MHz to 90MHz frequency range. This specific model operates at a nominal frequency of 22 MHz with a frequency stability and tolerance of ±30ppm. It features a load capacitance of 12pF and an equivalent series resistance (ESR) of 30 Ohms. The component utilizes an HC-49/US package form factor and supports an operating temperature range from -20°C to +70°C.
Feature Summary
- Surface-mount construction utilizing HC-49/US package geometry
- Frequency stability maintained within ±30ppm tolerance
- Optimized for digital world fueling applications
Applications
- Television systems
- Set-top boxes
- Cable modems
Procurement Notes
Verify the exact part number QT49S-22.000MAAE-T against official QST documentation to ensure correct frequency and package specifications. Confirm that the required load capacitance matches system design requirements. Check datasheet revisions for any updates to electrical characteristics or environmental ratings before finalizing procurement decisions.
Selection Notes
Select this component when a 22 MHz reference signal is required in space-constrained designs due to its surface-mount format. Ensure the application environment remains within the specified -20°C to +70°C operating range. Verify compatibility with circuit load capacitance of 12pF to maintain accurate frequency performance.
Part Context
This crystal belongs to the QT49S series from QST Products LLC, which covers frequencies from 3.2MHz to 90MHz. The series is engineered for consumer electronics requiring stable clock sources. The specific suffix indicates the 22 MHz variant with standard packaging and electrical parameters consistent with the broader product line.
Replacement Considerations
Direct substitutes include other QT49S series crystals with identical 22 MHz frequency, 12pF load capacitance, and HC-49/US package dimensions. Ensure replacement parts meet the same ±30ppm stability and ESR specifications to maintain circuit timing integrity.
