18QHTF21-121.775-PD

Overview

The 18QHTF21-121.775-PD is a quartz crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 121.775 MHz with an LVCMOS output logic level. The device functions on a single 1.8V supply voltage and features a standby capability for power down control. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm.

Feature Summary

• Supports low-voltage operation at 1.8V
• Includes standby function for power management
• Utilizes LVCMOS output interface

Applications

• General clock signal generation
• Digital circuit timing reference
• Embedded system synchronization

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 requirements regarding output logic and package type before finalizing procurement decisions.

Selection Notes

Select this component when a precise 121.775 MHz clock source is required for low-power digital applications. Ensure the design accommodates the 1.8V supply constraint and utilizes the appropriate footprint for the 4-SMD no-lead package configuration.

Part Context

This model belongs to the standard XO series from Mercury Electronics, designed for surface-mount integration. The product line emphasizes compact form factors suitable for modern electronic devices requiring reliable frequency control solutions.

Replacement Considerations

Direct substitutes must match the 121.775 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package dimensions. Verify pinout compatibility and electrical characteristics before cross-referencing alternative manufacturers.