18QHTF21-27.255-OE

Oscillators Overview

The 18QHTF21-27.255-OE is a 27.255 MHz crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It utilizes LVCMOS output logic and operates at a supply voltage of 1.8V. The device features an enable/disable control function and is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm.

Oscillators Feature Summary

• Supports LVCMOS output logic for standard digital interface compatibility
• Includes hardware enable and disable control functionality
• Designed for surface mount assembly in small form factor applications

Oscillators Applications

• General purpose clock signal generation
• Embedded system timing references
• Consumer electronics circuit boards

Oscillators Procurement Notes

Verify the exact frequency tolerance and load capacitance requirements against the specific application design before procurement. Confirm that the 1.8V supply voltage aligns with the target system power rails. Ensure the 4-SMD no-lead package footprint matches the PCB layout specifications to guarantee proper soldering and mechanical stability during operation.

Oscillators Selection Notes

Select this component when a precise 27.255 MHz reference is required for low-voltage digital circuits. The choice is driven by the need for a small 2.0x1.6mm footprint and the integration of an enable pin for power management. Consider the LVCMOS output swing compatibility with downstream logic gates to ensure signal integrity without additional buffering.

Oscillators Part Context

This part belongs to the Mercury Electronics SMD oscillator series, which expanded from leaded types to surface mount packages. The manufacturer has a history dating back to 1973, specializing in quartz crystals and oscillators. This specific model represents the transition to smaller, high-frequency surface mount solutions for modern electronic devices.

Oscillators Replacement Considerations

Direct substitutes include other 27.255 MHz LVCMOS oscillators in 4-SMD packages with 1.8V operation. Verify pinout compatibility and physical dimensions to ensure interchangeability without PCB redesign.