18QHTF21-85.500-OE

Overview

The 18QHTF21-85.500-OE is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd, operating at a nominal frequency of 85.5 MHz. It utilizes LVCMOS output logic and functions with a supply voltage of 1.8V. The device features an enable/disable control pin for power management. It is housed in a compact 4-SMD, no lead package designed for surface mount technology. The component supports an operating temperature range of -40°C to 85°C and exhibits a frequency stability of ±50ppm. Maximum supply current is specified at 22mA.

Feature Summary

• Integrates LVCMOS output logic for digital interface compatibility
• Includes enable/disable functionality for active power control
• Designed for surface mount assembly via 4-SMD no lead package

Applications

• General purpose clock signal generation in electronic circuits
• Timing reference for digital systems requiring 85.5 MHz
• Embedded devices utilizing 1.8V logic levels

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 power rails. Ensure the PCB footprint matches the 4-SMD no lead package dimensions provided in the official datasheet. Check for any specific handling instructions regarding electrostatic discharge sensitivity during assembly.

Selection Notes

Select this component when a precise 85.5 MHz timing source is required within a low-voltage 1.8V environment. The ±50ppm stability suits applications where moderate frequency accuracy is sufficient. Consider the enable pin requirement if power cycling or standby modes are part of the system architecture. Evaluate the thermal performance within the -40°C to 85°C range relative to the operational environment.

Part Context

This oscillator belongs to the Mercury Electronics 18QHTF series, which focuses on small form factor surface mount oscillators. The series typically offers various frequencies and voltage options. The 18QHTF21 variant specifically denotes the package type and output characteristics. This model represents a standard XO configuration rather than a spread-spectrum or differential output variant.

Replacement Considerations

Direct substitutes must match the 85.5 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD no lead package. Verify pinout compatibility and electrical specifications such as current consumption and stability. Cross-reference with other manufacturers offering equivalent SMD oscillators if availability is constrained.