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Product Detailed Parameters
- Description：1.6X1.2 SEAM SEAL MHZ QUARTZ XTA
- Series：QT161S
- Mfr：QST
- Package：Tape & Reel (TR)
- Type：MHz Crystal
- Frequency：25 MHz
- Frequency Stability：±30ppm
- Frequency Tolerance：±30ppm
- Load Capacitance：16pF
- 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：0.063" L x 0.047" W (1.60mm x 1.20mm)
- Height - Seated (Max)：0.016" (0.40mm)
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Overview
The QT161S-25.000MAAI-T is a surface-mount quartz crystal oscillator manufactured by QST, part of the QT161S series. It operates at a fundamental frequency of 25 MHz with a standard load capacitance of 16 pF. The component features a four-terminal SMD package with dimensions of 1.6 x 1.2 x 0.35 mm. Frequency stability is rated at ±30 ppm across both ambient and extended temperature ranges. The unit utilizes a seam seal construction for environmental protection.
Feature Summary
- Seam seal ceramic construction for enhanced environmental durability
- Four-terminal surface mount design for automated assembly compatibility
- Stable frequency output suitable for precision timing applications
Applications
- Low-power embedded system clock sources
- Microcontroller timing circuits
- Communication module synchronization
Procurement Notes
Verify the specific suffix AA against official QST documentation to confirm load capacitance and stability ratings. Ensure the ordering code matches the required 16 pF load specification. Confirm package dimensions align with PCB footprint requirements before finalizing procurement orders.
Selection Notes
Select this component when a 25 MHz reference with ±30 ppm stability is required in a compact 1.6x1.2mm footprint. Consider the 16 pF load capacitance requirement for circuit matching. Evaluate thermal performance needs against the specified stability range for the target operating environment.
Part Context
This crystal belongs to the QT161S family of small-sized surface-mount quartz resonators. The series offers various frequency options and stability grades within a standardized mechanical outline. The QT161S-25.000MAAI-T represents a specific configuration optimized for 25 MHz operation with defined electrical parameters.
Replacement Considerations
Cross-reference with other manufacturers offering 1.6x1.2mm 25MHz crystals with 16pF load capacitance. Verify pinout compatibility and equivalent electrical characteristics such as ESR and stability ratings before substitution.
