18QHTF21-79.944-PD

Overview

The 18QHTF21-79.944-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a fixed frequency of 79.944 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and includes a standby or power-down function to manage energy consumption. It is housed in a compact 4-SMD, no-lead package, suitable for surface-mount applications requiring precise timing signals.

Feature Summary

• Supports low-voltage operation with integrated power-down capability
• Provides stable clock signals via LVCMOS interface
• Utilizes a leadless surface-mount package design

Applications

• Digital signal processing systems
• Communication equipment timing circuits
• Embedded system clock generation

Procurement Notes

Verify the specific ordering suffix and frequency tolerance against project requirements before procurement. Confirm that the 1.8V supply voltage aligns with the target circuit design. Ensure compatibility with the 4-SMD no-lead footprint during PCB layout review. Check RoHS compliance status if environmental regulations apply to the final assembly process.

Selection Notes

Select this component when a precise 79.944 MHz reference is required for LVCMOS-compatible digital interfaces. Consider the 1.8V operating range for low-power designs. Evaluate the physical dimensions of the 4-SMD package against available board space. Assess thermal management needs based on the standby feature availability.

Part Context

This oscillator belongs to the AMPMODU series from Mercury Electronic Ind. Co., Ltd., a manufacturer with extensive experience in quartz crystal production. The company is recognized as an early pioneer in Taiwan's quartz industry. The product line focuses on providing reliable frequency control solutions for various electronic applications.

Replacement Considerations

Direct substitutes within the same series include models such as 18QHTF21-8.000-PD, 18QHTF21-51.200-PD, and 18QHTF21-96.768-PD. These alternatives share identical packaging and electrical characteristics but differ in operating frequency. Verify frequency requirements before swapping parts.