18QHTF21-121.760-OE

Overview

The 18QHTF21-121.760-OE is a standard crystal oscillator manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a frequency of 121.76 MHz and utilizes LVCMOS output logic. The device requires a 1.8V supply voltage and features an enable/disable control function. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm.

Feature Summary

• Supports active enable and disable control for power management
• Utilizes LVCMOS output logic for digital interface compatibility
• Designed in a small form factor surface-mount package

Applications

• Digital signal processing systems
• Communication equipment clock sources
• Embedded system timing references

Procurement Notes

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

Selection Notes

Select this component when a precise 121.76 MHz reference is required with low-voltage operation. The LVCMOS output is suitable for direct interfacing with standard digital logic families. Consider the enable pin functionality if dynamic power saving is necessary. The small package size makes it appropriate for space-constrained portable or high-density electronic designs requiring stable frequency generation.

Part Context

This oscillator belongs to the 18QHTF21 series from Mercury Electronic Ind. Co., Ltd, which specializes in quartz frequency control products. The series includes various frequencies such as 44.2 MHz and 96.768 MHz, all sharing similar package dimensions and electrical characteristics. Mercury Electronics has a long history in Taiwan's quartz crystal manufacturing industry, providing standardized oscillators for diverse industrial applications.

Replacement Considerations

Direct substitutes include other 18QHTF21 series variants with identical package and voltage specs but different frequencies, such as 18QHTF21-44.200-OE or 18QHTF21-96.768-OE, provided the frequency difference is acceptable for the circuit design.