QT252S-40.000MAAE-T

Overview

The QT252S-40.000MAAE-T is a surface-mount quartz crystal oscillator manufactured by QST. It operates at a fundamental frequency of 40 MHz with a load capacitance of 12 pF. The component features a 4-SMD, no-lead package with dimensions of 2.5 x 2.0 mm. Frequency stability is rated at ±30 ppm at 25°C and ±30 ppm across the industrial temperature range of -20°C to 70°C. The device utilizes seam seal technology for reliable performance in electronic circuits requiring precise timing.

Feature Summary

• Seam seal construction for enhanced environmental protection
• Compact 2.5x2.0 mm surface-mount footprint
• Industrial temperature range operation from -20°C to 70°C
• High frequency stability of ±30 ppm

Applications

• Clock generation for microprocessors and microcontrollers
• Timing references for communication interfaces
• Digital signal processing systems
• Consumer electronics requiring precise timekeeping

Procurement Notes

Verify the manufacturer designation as QST or TXC Corporation, as both entities are associated with this part number series. Confirm the specific suffix MAAE-T corresponds to the 12pF load capacitance and -20 to 70°C temperature range. Ensure the datasheet matches the 4-SMD no-lead package type. Cross-reference the RoHS compliance status with current regulatory requirements before finalizing procurement orders.

Selection Notes

Select this component when a 40 MHz reference with ±30 ppm stability is required within a compact SMD form factor. The 12pF load capacitance must match the oscillator circuit design specifications. Consider the -20 to 70°C operating range for standard industrial applications. Verify that the seam seal package meets the mechanical and environmental constraints of the target PCB layout.

Part Context

This crystal belongs to the QT252S series of low-profile, surface-mount quartz resonators. The series offers various frequencies and stability options in a standardized 2.5x2.0 mm package. These components are designed for high-volume manufacturing processes and provide consistent electrical characteristics suitable for modern portable and industrial electronic devices.

Replacement Considerations

QT252S-40.000MAHQ-T: Offers similar specifications but may differ in temperature range or load capacitance details. QT252S-40.000M-GPR: Provides 20ppm stability which is tighter than the selected part. Verify pin compatibility and electrical parameters before substitution.