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Product Detailed Parameters
- Description：2.5X2.0 SEAM SEAL MHZ QUARTZ XTA
- Series：QT252S
- Mfr：QST
- Package：Tape & Reel (TR)
- Type：MHz Crystal
- Frequency：12 MHz
- Frequency Stability：±30ppm
- Frequency Tolerance：±30ppm
- Load Capacitance：12pF
- ESR (Equivalent Series Resistance)：150 Ohms
- Operating Mode：Fundamental
- Operating Temperature：-40°C ~ 85°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)：0.022" (0.55mm)
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Overview
The QT252S-12.000MAHE-T is a quartz crystal oscillator manufactured by TXC Corporation, distributed under the QST brand designation. It operates at a fundamental frequency of 12 MHz with a load capacitance of 12 pF. The component exhibits a frequency stability of ±30 ppm at 25°C and ±30 ppm across the industrial temperature range of -40°C to +85°C. It utilizes a surface-mount package measuring 2.5 mm x 2.0 mm with four pads.
Feature Summary
- Seam seal construction for enhanced environmental protection
- Compact 2.5x2.0 mm SMD footprint for space-constrained designs
- Industrial temperature rating supporting wide operational ranges
Applications
- Embedded communication systems requiring precise timing
- Microcontroller clock sources in consumer electronics
- Industrial control boards operating in variable temperatures
Procurement Notes
Verify manufacturer origin as TXC Corporation despite QST branding. Confirm package dimensions match 2.5x2.0mm specifications. Validate frequency tolerance against ±30ppm requirements. Ensure compatibility with 12pF load capacitance circuits. Check datasheet for specific soldering profile recommendations.
Selection Notes
Select this component when a 12 MHz reference is required with moderate stability. Consider the 2.5x2.0mm size for board real estate constraints. Verify that the ±30ppm tolerance meets system timing accuracy needs. Ensure the operating environment stays within -40°C to +85°C limits.
Part Context
This part belongs to the QT252S series of seam seal crystals. Similar variants include different frequencies like 24 MHz or 48 MHz. The series offers various stability options and load capacitances. It serves as a standard timing element for general-purpose digital circuits.
Replacement Considerations
Direct substitutes may include other 12 MHz crystals with identical 2.5x2.0mm packages and 12pF load capacitance. Verify equivalent stability ratings of ±30ppm. Check for compatible operating temperature ranges. Ensure pinout compatibility for seamless integration.
