18QHTF21-78.59823-PD

Overview

The 18QHTF21-78.59823-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 78.59823 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a standby mode with power-down capability. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm.

Feature Summary

• Supports low-voltage operation at 1.8V
• Includes standby functionality with power-down control
• Provides LVCMOS output signal compatibility

Applications

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

Procurement Notes

Verify the exact frequency tolerance and load capacitance requirements against your circuit design specifications before procurement. Ensure that the 1.8V supply rail stability meets the oscillator's operational needs. Confirm that the PCB footprint matches the 4-SMD no-lead package dimensions to avoid assembly issues during manufacturing.

Selection Notes

Select this component when a specific frequency of 78.59823 MHz is required for LVCMOS interfaces. Consider the 1.8V supply constraint and the need for power-down capabilities. Evaluate the small form factor suitability for space-constrained designs compared to larger oscillator packages.

Part Context

This part belongs to the QHTF series of surface-mount oscillators from Mercury Electronics. The series typically offers standard frequencies with LVCMOS outputs. The 'PD' suffix indicates the inclusion of a power-down pin or function, distinguishing it from non-power-down variants within the same family.

Replacement Considerations

Direct substitutes must match the 78.59823 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD no-lead package. Verify pinout compatibility and thermal characteristics. Cross-reference with other manufacturers offering identical frequency and package constraints.