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Product Detailed Parameters
- Description：1.6X1.2 SEAM SEAL MHZ XTAL -4PAD
- Series：QT121S
- Mfr：QST
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：MHz Crystal
- Frequency：27.12 MHz
- Frequency Stability：±30ppm
- Frequency Tolerance：±30ppm
- Load Capacitance：8pF
- ESR (Equivalent Series Resistance)：100 Ohms
- Operating Mode：Fundamental
- Operating Temperature：-20°C ~ 70°C
- Ratings：-
- Mounting Type：Surface Mount
- Package / Case：4-SMD, No Lead
- Size / Dimension：0.098" L x 0.079" W (2.50mm x 2.00mm)
- Height - Seated (Max)：0.016" (0.40mm)
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Overview
The QT161S-27.120MAAV-T is a surface-mount crystal oscillator manufactured by QST. It operates at a fundamental frequency of 27.12 MHz with a frequency tolerance and stability of ±30 ppm. The component features an equivalent series resistance (ESR) of 100 Ohms and a load capacitance of 8 pF. It utilizes a 4-SMD, no-lead package with dimensions of 1.60 mm x 1.20 mm. The device is RoHS3 compliant and designed for applications requiring precise timing signals in compact electronic systems.
Feature Summary
- Fundamental mode operation for stable frequency generation
- Compact 4-SMD no-lead surface mount packaging
- RoHS3 compliant construction for environmental safety
Applications
- Clock source for microcontrollers
- Timing reference for communication modules
- Frequency control in consumer electronics
Procurement Notes
Verify the specific suffix codes against official QST documentation to ensure correct frequency and tolerance specifications. Confirm RoHS3 compliance status through current datasheets. Check for alternative lead-free options if required by regional regulations. Ensure compatibility with standard SMT reflow profiles during assembly planning.
Selection Notes
Select this component when a 27.12 MHz fundamental frequency is required with ±30 ppm stability. The 100 Ohm ESR and 8 pF load capacitance must match the oscillator circuit design. The 1.6x1.2 mm footprint is suitable for high-density PCB layouts. Consider thermal stability requirements within the specified operating range.
Part Context
This part belongs to QST's line of surface-mount crystals. It provides a reliable timing solution for digital circuits. The 4-SMD package allows for automated placement. The fundamental mode ensures low phase noise characteristics. It serves as a critical component for synchronization in various electronic devices.
Replacement Considerations
Direct substitutes include other 27.12 MHz crystals with identical 4-SMD dimensions and electrical parameters. Verify that replacement parts maintain the same 100 Ohm ESR and 8 pF load capacitance. Ensure the substitute offers comparable ±30 ppm stability. Check for compatible mounting and soldering requirements.
