18QHTF21-12.040-OE

Overview

The 18QHTF21-12.040-OE is a standard crystal oscillator manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a frequency of 12.04 MHz and utilizes LVCMOS output logic. The device supports a supply voltage of 3.3V and features an enable/disable control function. It is housed in a compact 4-SMD, no lead package with dimensions of 3.2x2.5 mm, designed for surface-mount applications requiring precise timing signals.

Feature Summary

• LVCMOS compatible output interface
• Integrated enable and disable control functionality
• Compact 4-pin surface-mount package design

Applications

• High-performance digital systems
• Communication equipment timing
• Embedded controller clock sources

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Confirm that the 3.3V supply voltage aligns with your system's power rails. Ensure the 3.2x2.5 mm footprint matches your PCB layout constraints. Check for any specific ordering suffixes required for tape-and-reel packaging if applicable to your assembly process.

Selection Notes

Select this component when a low-power, small-footprint oscillator is required for 3.3V logic systems. The LVCMOS output ensures compatibility with standard digital inputs. Consider the enable pin utility for power management strategies. Evaluate thermal performance and stability needs against the standard XO specifications provided in the official datasheet.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, a Taiwanese manufacturer established in 1973. The series includes various frequencies such as 8.64 MHz and 54 MHz. Mercury is recognized as a pioneer in Taiwan's quartz crystal industry, offering components like TCXOs and VCTCXOs alongside standard oscillators.

Replacement Considerations

Direct substitutes include other 12.04 MHz LVCMOS oscillators in 3.2x2.5 mm packages from manufacturers like Epson or SiTime. Verify pinout compatibility and electrical parameters such as jitter and phase noise before substitution.