18QHTF21-84.73175-PD

Overview

The 18QHTF21-84.73175-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 84.73175 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a standby or power-down function to manage energy consumption. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm, suitable for surface-mount applications requiring precise timing signals.

Feature Summary

• Supports low-voltage operation at 1.8V
• Includes standby and power-down functionality
• Utilizes LVCMOS output logic for digital compatibility
• Housed in a small 4-SMD no-lead package

Applications

• Digital signal processing systems
• Communication equipment requiring precise clocking
• Embedded control systems
• Portable electronic devices

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before ordering. Confirm that the 1.8V supply voltage aligns with your system's power rails. Ensure the PCB footprint matches the 2.0x1.6mm 4-SMD no-lead package specifications to avoid assembly issues. Check for any specific handling instructions related to electrostatic discharge during installation.

Selection Notes

Select this component when a stable 84.73175 MHz clock source is required for LVCMOS-compatible circuits. The integrated power-down feature makes it suitable for battery-operated devices where energy efficiency is critical. Consider the physical size constraints of the 2.0x1.6mm package when designing the layout. Ensure the operating temperature range meets the environmental conditions of the final application.

Part Context

This part belongs to the 18QHTF21 series of surface-mount crystal oscillators from Mercury Electronics. The series offers various frequencies and voltage options within a standardized small form factor. These oscillators are designed to replace discrete crystal and resonator combinations, providing a ready-to-use clock signal solution for modern electronics.

Replacement Considerations

Direct replacements must match the 84.73175 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD no-lead package dimensions. Verify that alternative suppliers offer equivalent frequency stability and phase noise characteristics. Ensure the pinout configuration is identical to prevent circuit modification.