18QHTF21-85.125-OE

Overview

The 18QHTF21-85.125-OE is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 85.125 MHz and utilizes LVCMOS output logic. The device functions with a supply voltage of 1.8V and includes enable/disable control capabilities. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6 mm. This component is designed for applications requiring precise timing signals within low-voltage digital systems.

Feature Summary

• Integrates LVCMOS output logic for direct interfacing with digital circuits
• Features active enable and disable control functionality for power management
• Utilizes a compact surface-mount package suitable for space-constrained designs

Applications

• Digital signal processing systems requiring precise clock synchronization
• Communication equipment utilizing standard frequency references
• Embedded systems operating on 1.8V power supplies

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target circuit design before procurement. Confirm that the 1.8V supply voltage aligns with the system's power rails. Ensure the PCB footprint matches the 4-SMD No Lead package dimensions to prevent assembly issues. Cross-reference the enable pin configuration with the schematic to guarantee proper control logic integration.

Selection Notes

Select this oscillator when a fixed 85.125 MHz reference is required for LVCMOS-compatible logic families. Consider the 1.8V operating voltage constraint when designing power distribution networks. Evaluate the small form factor benefits against thermal dissipation needs in dense layouts. Verify that the enable feature supports the system's power cycling strategy.

Part Context

This component belongs to the Mercury Electronics XO series, which specializes in standard frequency oscillators. The 18QHTF21 prefix indicates a specific package size and output type within their portfolio. Mercury Electronics has established itself as a manufacturer of quartz-based frequency control products since 1973, focusing on SMD solutions for modern electronics.

Replacement Considerations

Direct substitutes must match the 85.125 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package. Check datasheets for equivalent parts from other manufacturers offering identical electrical characteristics and pinout configurations to ensure seamless integration without redesign.