QT252S-27.000MAAV-T

Overview

The QT252S-27.000MAAV-T is a surface-mount quartz crystal oscillator manufactured by QST Corporation Limited. It operates at a fundamental frequency of 27 MHz with a tolerance and stability of ±30 ppm across the -40°C to +85°C temperature range. The component features a 4-SMD, no-lead package with dimensions of 2.5x2.0x0.55 mm. It utilizes an 8 pF load capacitance and has a maximum equivalent series resistance (ESR) of 100 Ohms.

Feature Summary

• Seam seal construction for environmental protection
• Surface-mount design for automated assembly
• Wide operating temperature range capability

Applications

• Clock signal generation in communication modules
• Timing reference for microcontroller systems
• Frequency control in consumer electronics

Procurement Notes

Verify the specific suffix 'AAV' against the manufacturer's current datasheet to confirm the exact temperature stability and load capacitance specifications. Ensure the required frequency tolerance aligns with system requirements before procurement. Confirm package compatibility with PCB footprint designs.

Selection Notes

Select this component when a 27 MHz timing source is required in space-constrained applications. Consider the ±30 ppm stability requirement relative to system clock accuracy needs. Evaluate the 100 Ohm ESR limit against the oscillator circuit's drive level constraints to ensure reliable startup and operation.

Part Context

This part belongs to the QT252S series of seam-seal crystals from QST. The series offers various frequency options and stability grades. The 27 MHz variant is commonly used in legacy and specialized RF applications requiring precise frequency references in compact form factors.

Replacement Considerations

Direct substitutes include other 27 MHz SMD crystals with identical 2.5x2.0mm footprints and ±30 ppm stability. Verify pinout compatibility and electrical parameters such as load capacitance and ESR before substitution.