18QHTF21-76.746869-PD

Overview

The 18QHTF21-76.746869-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 76.746869 MHz with an LVCMOS output logic level. The device functions on a 1.8V supply voltage and includes a standby power-down feature for energy management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm.

Feature Summary

• LVCMOS output interface
• Standby power-down capability
• Compact 4-SMD no-lead form factor

Applications

• Digital signal processing systems
• Communication equipment timing
• Embedded microcontroller clock sources

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 PCB footprint matches the 2.0x1.6mm SMD package dimensions to guarantee proper soldering and mechanical stability during assembly processes.

Selection Notes

Select this component when a precise 76.746869 MHz clock signal is required in space-constrained designs. The LVCMOS output ensures compatibility with standard digital logic families. Consider the standby function if power efficiency is critical. Verify that the operating temperature range meets your environmental specifications prior to integration into the final product design.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz crystals and oscillators. The series offers various frequencies within a small SMD package. Mercury has been a Taiwan-based frequency control supplier since 1973, providing components for industrial and consumer electronics applications requiring stable timing solutions.

Replacement Considerations

Direct substitutes must match the 76.746869 MHz frequency, 1.8V operation, LVCMOS output, and 4-SMD 2.0x1.6mm package. Check datasheets for equivalent parts from other manufacturers ensuring identical pinout and electrical characteristics to maintain board compatibility.