18QHTF21-78.300-OE

Overview

The 18QHTF21-78.300-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 78.3 MHz and utilizes LVCMOS output logic. The device is designed for low-voltage applications, requiring a supply voltage of 1.8V. A key functional characteristic is the inclusion of an Enable/Disable control pin, allowing for power management during inactive periods. The component is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm, suitable for space-constrained surface-mount designs.

Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Features an integrated Enable/Disable control function for power optimization
• Utilizes a compact 4-SMD no-lead surface mount package

Applications

• Digital signal processing systems
• Communication equipment clocking
• Embedded microcontroller timing sources

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to ensure compatibility with required voltage levels and output types. Confirm that the 1.8V supply requirement aligns with the target system design. Check for any recent updates to the mechanical drawing or thermal specifications before finalizing the bill of materials.

Selection Notes

Select this component when a precise 78.3 MHz reference is required for LVCMOS-compatible circuits. The choice is driven by the need for a small form factor and the ability to actively disable the oscillator to reduce standby power consumption. Ensure the operating temperature range meets the environmental conditions of the intended application.

Part Context

This part belongs to the 18QHTF21 series of surface-mount oscillators from Mercury Electronics. The series offers various frequencies and voltage options. The -OE suffix typically denotes specific electrical characteristics or packaging variations within the product line, distinct from other suffixes like -PD which may indicate different operational parameters.

Replacement Considerations

Direct substitutes must match the 78.3 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm footprint. Verify pinout compatibility and enable/disable functionality before swapping.