18QHTF21-78.250-OE

Overview

The 18QHTF21-78.250-OE is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 78.25 MHz and utilizes LVCMOS output logic. The device functions with a supply voltage of 1.8V and includes an enable/disable control feature for power management. It is housed in a compact 4-SMD, No Lead package, suitable for surface-mount applications requiring precise timing signals.

Feature Summary

• Integrates LVCMOS output logic for direct digital interface compatibility
• Features integrated enable/disable control functionality to manage power consumption
• Utilizes a leadless SMD package design optimized for automated surface-mount assembly processes

Applications

• General clock signal generation in embedded systems
• Timing reference sources for data communication interfaces
• Power management circuits requiring precise frequency control

Procurement Notes

Verify the specific operating temperature range and load capacitance requirements against the target application environment 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 provided in the official datasheet to prevent mounting issues during assembly.

Selection Notes

Select this component when a stable 78.25 MHz reference is required with low-voltage operation. The enable pin allows for dynamic power control, making it suitable for battery-operated devices. Consider the package size constraints and thermal performance needs relative to other available oscillator families from the manufacturer.

Part Context

This model belongs to the 18QHTF21 series of standard crystal oscillators from Mercury Electronics. The series offers various frequencies with consistent LVCMOS outputs and 1.8V operation. The suffix indicates specific frequency tuning and packaging details within the manufacturer's standardized product line for timing solutions.

Replacement Considerations

Direct substitutes include other 18QHTF21 variants with identical pinouts and electrical characteristics but different frequencies, such as the 18QHTF21-86.8875-OE or 18QHTF21-50.256-OE, provided the system clock requirements allow for frequency adjustment.