18QHTF21-77.760-OE

Overview

The 18QHTF21-77.760-OE is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 77.76 MHz and utilizes LVCMOS output logic. The component requires a supply voltage of 1.8V and features an enable/disable control function. It is housed in a compact 4-SMD, no lead package with dimensions of 2.0mm x 1.6mm.

Feature Summary

• Supports active low enable/disable control for power management
• Provides stable LVCMOS output signals
• Designed for surface-mount assembly

Applications

• Digital signal processing circuits
• Communication equipment clock sources
• Embedded system timing references

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 SMD package dimensions to guarantee proper soldering and mechanical stability during operation.

Selection Notes

Select this model when a precise 77.76 MHz reference is required for LVCMOS-compatible digital interfaces. Consider the 1.8V operating voltage constraint and the need for external enable control. Evaluate the small form factor suitability for space-constrained designs compared to larger oscillator packages.

Part Context

This part belongs to the QHTF series of surface-mount oscillators from Mercury Electronics. The series offers various frequencies and voltage levels, typically utilizing TCXO or XO technologies. The 18 prefix indicates the 1.8V supply variant, while the suffix specifies the exact frequency and package type within the product line.

Replacement Considerations

Direct substitutes must match the 77.76 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm package. Verify pinout compatibility and electrical specifications such as phase noise and jitter before swapping components.