QTM252E-27.000MBM-T

Overview

The QTM252E-27.000MBM-T is a surface-mount crystal oscillator manufactured by QST, designed for high-reliability electronic applications. It operates at a nominal frequency of 27 MHz with a standard CMOS output configuration optimized for low electromagnetic interference (EMI). The device functions on a single 3.3V DC supply voltage and provides a frequency stability of ±50 ppm. It supports an enable/disable control function and is rated for operation across an extended industrial temperature range from -40°C to +125°C. The component utilizes a compact SMD package measuring 2.5mm x 2.0mm x 0.8mm.

Feature Summary

• Low EMI CMOS output signal generation
• Enable/Disable control functionality
• Extended industrial temperature rating

Applications

• Industrial communication systems
• Consumer electronics timing circuits
• Embedded system clock sources

Procurement Notes

Verify the complete part number including the suffix to ensure correct package and specification alignment. Confirm that the required operating temperature range and supply voltage match the design requirements. Check for RoHS compliance status if environmental regulations apply to the final product assembly. Ensure the footprint matches the specified 2520 SMD dimensions during PCB layout.

Selection Notes

Select this component when a 27 MHz reference clock is required in space-constrained designs. The low EMI characteristic makes it suitable for sensitive analog or RF sections within mixed-signal boards. Consider the ±50 ppm stability for general digital logic synchronization where high precision is not critical. The wide temperature range supports deployment in harsh environments without additional thermal management.

Part Context

This oscillator belongs to the QTM252E series from QST, which focuses on small-footprint timing solutions. The series offers various frequencies and stability options within the same mechanical envelope. The 27 MHz variant is commonly used in legacy interface standards and specific audio processing applications requiring precise clock division.

Replacement Considerations

Direct substitutes may include other 27 MHz XO oscillators with identical 2520 footprints and 3.3V operation. Verify pin compatibility and electrical parameters such as current consumption and load capacitance before swapping. Cross-reference with manufacturers offering similar low EMI specifications.