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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：24.576 MHz
- Frequency Stability：±30ppm
- Frequency Tolerance：±30ppm
- Load Capacitance：18pF
- 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)：0.022" (0.55mm)
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Overview
The QT252S-24.576MAAJ-T is a surface-mount quartz crystal resonator manufactured by QST, part of the QT252S series. It operates at a nominal frequency of 24.576 MHz with a load capacitance of 18 pF. The component utilizes a 2.5 mm x 2.0 mm x 0.55 mm SMD package and features a seam seal construction. Frequency stability is specified at ±30 ppm at 25°C and ±30 ppm over an operating temperature range of -20°C to 70°C. The device is RoHS compliant and lead-free.
Feature Summary
- Seam seal construction for enhanced environmental protection
- Surface mount design compatible with automated assembly processes
- RoHS compliant and lead-free manufacturing
Applications
- Clock generation for microprocessors and microcontrollers
- Timing references in communication modules
- Frequency control in consumer electronic devices
Procurement Notes
Verify manufacturer designation as QST or TXC Corporation, as both entities are associated with this part number across different distributors. Confirm the specific suffix 'T' indicates tape and reel packaging if required for production. Ensure the load capacitance matches the circuit design requirements before procurement.
Selection Notes
Select this component when a 24.576 MHz reference is needed in a compact 2.5x2.0 mm footprint. The ±30 ppm stability suits applications tolerant of moderate frequency drift. Verify that the -20°C to 70°C operating range meets the environmental constraints of the target system.
Part Context
This crystal belongs to the QT252S family of small-sized surface-mount quartz crystals. The series offers various frequencies and stability grades within a standardized 2.5x2.0 mm case size, allowing for consistent board layout across different product variants requiring different clock speeds.
Replacement Considerations
QT252S-24.576MDDQ-T (TXC) offers similar dimensions but differs in stability specifications and load capacitance. Cross-reference electrical parameters carefully to ensure compatibility with existing oscillator circuits.
