18QHTF21-80.000-PD

Overview

The 18QHTF21-80.000-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 80 MHz and utilizes LVCMOS output logic levels. The device functions with a supply voltage of 1.8V and includes a standby or power-down feature for energy management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6 mm, suitable for surface-mount applications requiring precise timing signals.

Feature Summary

• Standard XO oscillator design for critical timing applications
• LVCMOS output interface compatible with digital logic circuits
• Integrated standby mode for power reduction

Applications

• Critical timing applications requiring stable clock signals
• High-frequency oscillator circuits for precise timing needs
• Embedded systems utilizing LVCMOS logic interfaces

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the official datasheet before integration. Confirm that the 1.8V supply voltage aligns with the target system's power architecture. Ensure the 4-SMD no-lead package footprint matches the PCB layout design to guarantee proper soldering and mechanical stability during assembly processes.

Selection Notes

Select this component when a low-voltage 1.8V operation is required alongside an 80 MHz clock signal. The LVCMOS output makes it suitable for direct interfacing with standard digital components without additional level shifting. Consider the small 2.0x1.6 mm package size for space-constrained designs where surface-mount technology is preferred over through-hole alternatives.

Part Context

This part belongs to the QHTF series of oscillators from Mercury United Electronics, Inc., designed for high-frequency precision timing. The '18' prefix typically indicates the 1.8V operating voltage, while '80.000' denotes the nominal frequency. The '-PD' suffix signifies the inclusion of a power-down capability, distinguishing it from continuous-operation variants within the same family.

Replacement Considerations

The 3QHTF21-80.000-PD is listed as an equivalent or alternate part number. Verify if the voltage difference (3.3V vs 1.8V) is acceptable for the application. Other potential substitutes may include parts from the same manufacturer with identical frequency and package specifications but different voltage ratings.