QTM325-12.000MBA-T

Overview

The QTM325-12.000MBA-T is a surface-mount CMOS oscillator manufactured by QST, operating at a nominal frequency of 12 MHz. It features a frequency stability of ±25 ppm and operates on a 3.3 V supply voltage. The component utilizes a 3.2 mm x 2.5 mm package size with a low profile height of 1.0 mm maximum. Designed for base harmonic operation, it offers reliable performance within an operating temperature range of -40°C to +85°C. This quartz crystal oscillator provides a stable clock signal suitable for digital circuit applications requiring precise timing.

Feature Summary

• CMOS output interface compatible with standard logic families
• Surface mount design in compact 3.2mm x 2.5mm footprint
• Wide operating temperature range from -40°C to +85°C
• High frequency stability of ±25 ppm

Applications

• Digital communication systems requiring precise clocking
• Microcontroller and microprocessor clock sources
• Consumer electronics with space-constrained designs
• Industrial control equipment operating in varied temperatures

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to ensure correct voltage and stability specifications. Confirm that the requested part number matches the exact frequency and package dimensions required for your PCB layout. Cross-reference the datasheet revision date to ensure compatibility with current manufacturing standards. Ensure storage conditions comply with moisture sensitivity levels if applicable.

Selection Notes

Select this component when a 12 MHz CMOS clock source is required in a small surface-mount package. Consider the ±25 ppm stability requirement against system timing tolerances. Verify that the 3.3V supply voltage aligns with the target circuit's power rails. Evaluate the -40°C to +85°C temperature range against the environmental conditions of the final application.

Part Context

This oscillator belongs to the QTM325 series from QST, designed for general-purpose timing applications. The series offers various frequencies and stability options within a standardized 3.2x2.5mm SMD package. It serves as a direct replacement for legacy through-hole crystals where space savings are critical. The CMOS output simplifies integration into modern digital logic circuits without additional buffer components.

Replacement Considerations

Direct substitutes include other 12MHz 3.2x2.5mm CMOS oscillators with ±25ppm stability and 3.3V operation. Check pinout compatibility and electrical characteristics before substitution. Alternative manufacturers may offer similar form-factor devices but require verification of load capacitance and drive level specifications.