18QHTF21-21.855-OE

Oscillators Overview

The 18QHTF21-21.855-OE is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 21.855 MHz and utilizes LVCMOS output logic levels. The device supports a supply voltage of 1.8V and includes an enable/disable control function for power management. It is housed in a compact 4-SMD, no lead package suitable for surface mount applications.

Oscillators Feature Summary

• LVCMOS output logic interface
• Integrated enable/disable control functionality
• Standard quartz crystal oscillator design

Oscillators Applications

• Computing systems
• Consumer electronics
• Communication devices
• Industrial equipment

Oscillators Procurement Notes

Verify the exact electrical specifications and mechanical dimensions against the official product datasheet before integration. Confirm that the 1.8V supply requirement and LVCMOS output compatibility match the target circuit design. Ensure the 4-SMD package footprint aligns with the PCB layout to prevent assembly issues.

Oscillators Selection Notes

Select this component when a precise 21.855 MHz clock signal is required with low voltage operation. The integrated enable feature allows for dynamic power control in battery-sensitive designs. Verify that the operating temperature range meets the environmental requirements of the specific application scenario.

Oscillators Part Context

This part belongs to the H21 series of SMD oscillators from Mercury Electronics. The manufacturer has over 50 years of experience in quartz crystal production and holds IATF 16949 certification. The series is designed for general-purpose timing applications across computing and communication sectors.

Oscillators Replacement Considerations

Compatible substitutes include other 21.855 MHz LVCMOS oscillators in 4-SMD packages with 1.8V supply and enable pins. Verify pinout compatibility and frequency tolerance specifications before substitution.