QTM252E-27.000MDM-T

Overview

The QTM252E-27.000MDM-T is a surface-mount crystal oscillator manufactured by QST. It operates at a frequency of 27 MHz with CMOS output levels and a supply voltage of 1.8V. The device features low electromagnetic interference (EMI) characteristics and offers a frequency stability of ±50 ppm across an operating temperature range of -40°C to +125°C. It utilizes a 4-SMD, no-lead package measuring 2.50mm x 2.00mm with a maximum seated height. The component includes enable/disable functionality and supports phase modulation clock mode via pin configuration.

Feature Summary

• Low EMI CMOS output for signal integrity
• Wide industrial temperature range operation
• Compact 4-SMD no-lead surface mount package
• Configurable phase modulation and enable control

Applications

• Embedded communication systems
• Industrial control circuits
• Consumer electronics requiring stable clock sources

Procurement Notes

Verify the manufacturer designation as QST, noting that some distributor listings may incorrectly associate this part with Texas Instruments. Confirm the specific suffix 'MDM' corresponds to the 27 MHz frequency and 1.8V supply voltage. Ensure the package type matches the 4-SMD no-lead specification. Check for RoHS compliance status if required for your assembly process. Validate the operating temperature range against your environmental requirements.

Selection Notes

Select this component when a compact, low-power 27 MHz clock source is required for embedded applications. The 1.8V supply voltage makes it suitable for modern low-voltage digital logic families. The wide temperature range ensures reliability in harsh environments. Consider the low EMI feature if signal noise sensitivity is a concern in the design. The enable pin allows for power management strategies in battery-operated devices.

Part Context

This oscillator belongs to the QTM252E series from QST, which provides standard CMOS outputs in small form factors. The series includes various frequencies such as 30 MHz and 33.333 MHz, all sharing similar package dimensions and electrical characteristics. The QTM252E line is designed for applications demanding precise timing in space-constrained PCB layouts.

Replacement Considerations

Direct substitutes within the same series include QTM252E-30.000MDM-T and QTM252E-33.333MBM-T, though these operate at different frequencies. Verify that any replacement maintains the 27 MHz requirement and 1.8V supply compatibility. Cross-reference package dimensions to ensure mechanical fit.