18QHTF21-81.982492-PD

Overview

The 18QHTF21-81.982492-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 81.982492 MHz and utilizes an LVCMOS output interface. The device supports a supply voltage of 1.8V and includes a standby or power-down function for energy management. It is housed in a compact 4-SMD, no-lead package, designed for surface-mount applications requiring precise timing signals.

Feature Summary

• Standard XO type with crystal base resonator
• LVCMOS output signal compatibility
• Integrated standby and power-down functionality
• Compact 4-SMD no-lead surface mount package

Applications

• Digital signal processing systems
• Communication equipment timing references
• Embedded control circuits
• Data acquisition modules

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Confirm that the 1.8V supply voltage aligns with your system's power rails. Ensure the 4-SMD no-lead footprint matches your PCB layout specifications to guarantee proper soldering and mechanical stability during assembly.

Selection Notes

Select this component when a precise 81.982492 MHz clock source is required with low power consumption capabilities. The LVCMOS interface ensures compatibility with standard digital logic families. Consider the standby feature if power efficiency is critical. The small form factor makes it suitable for space-constrained designs compared to larger through-hole alternatives.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronic Ind. Co., Ltd, a manufacturer specializing in quartz crystals and oscillators. The series typically offers various frequency options within a standardized package. Mercury has established itself as a pioneer in the Taiwan quartz industry, providing reliable frequency control products for global electronics markets.

Replacement Considerations

Direct substitutes must match the 81.982492 MHz frequency, LVCMOS output, 1.8V operation, and 4-SMD no-lead package. Verify pinout compatibility and electrical characteristics such as phase noise and jitter before swapping. Generic replacements may differ in thermal performance or long-term stability.