18QHTF21-121.250-PD

Overview

The 18QHTF21-121.250-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 121.25 MHz with LVCMOS output logic. The device requires a 1.8V supply voltage and features a power-down standby function. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6 mm.

Feature Summary

• Supports low-voltage operation at 1.8V
• Includes power-down standby capability
• Utilizes LVCMOS output interface

Applications

• Digital signal processing systems
• Communication equipment clocking
• Embedded system timing references

Procurement Notes

Verify the specific ordering suffix to ensure compatibility with required frequency and voltage specifications. Confirm that the selected variant matches the intended application's electrical requirements and physical footprint constraints before finalizing procurement orders.

Selection Notes

Select this component for applications requiring precise timing at 121.25 MHz with minimal power consumption. Ensure the design supports the 1.8V supply rail and accommodates the small 2.0x1.6 mm surface-mount package dimensions within the available PCB area.

Part Context

This model belongs to the Mercury Electronics XO series, designed for high-frequency stability in space-constrained electronics. The 18QHTF21 series specifically targets low-power digital applications requiring reliable clock signals in compact form factors.

Replacement Considerations

Direct substitutes include other 121.25 MHz LVCMOS oscillators from Mercury Electronics with identical 1.8V operation and 2.0x1.6 mm packaging. Verify pinout compatibility and thermal characteristics when considering alternative manufacturers.