18QHTF21-21.000-OE

Oscillators Overview

The 18QHTF21-21.000-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronic Ind. Co. Ltd. It operates at a fixed frequency of 21 MHz and utilizes LVCMOS output logic. The device supports a supply voltage of 1.8V and features an enable/disable control function for power management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm.

Oscillators Feature Summary

• LVCMOS output logic for digital interface compatibility
• Integrated enable/disable control functionality
• Compact surface-mount package design

Oscillators Applications

• General purpose timing circuits
• Digital signal processing systems
• Embedded controller clock sources

Oscillators Procurement Notes

Verify the specific suffix OE against the manufacturer's current naming convention to ensure exact match. Confirm that the 1.8V supply requirement aligns with the target system's voltage rails. Check for RoHS compliance status if required by project specifications. Ensure the 4-SMD footprint matches the PCB layout constraints.

Oscillators Selection Notes

Select this component when a precise 21 MHz reference is required for low-voltage digital applications. The LVCMOS output is suitable for direct interfacing with standard logic families. Consider the enable pin utility for power-sensitive designs requiring dynamic clock gating. Evaluate the small form factor against available board space limitations.

Oscillators Part Context

This part belongs to the Mercury 18QHT series of surface-mount crystal oscillators. The series typically offers various frequencies and voltage options within a standardized 2.0x1.6mm footprint. Mercury Electronics specializes in quartz timing components, providing stable frequency sources for consumer and industrial electronics.

Oscillators Replacement Considerations

Direct replacements must match the 21 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm package. Verify electrical parameters such as load capacitance and drive level before substitution.