18QHTF21-77.863-OE

Overview

The 18QHTF21-77.863-OE is a 77.863 MHz crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a supply voltage of 1.8V and features LVCMOS output logic. The component includes an enable/disable control function and is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm.

Feature Summary

• Provides stable 77.863 MHz clock signals via LVCMOS output
• Supports low power operation with 1.8V supply voltage
• Includes enable/disable functionality for power management

Applications

• General purpose clock generation in embedded systems
• Timing reference for digital signal processing units
• Clock source for communication interface circuits

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Ensure the 1.8V supply rail stability meets the oscillator's operational specifications. Confirm that the enable/disable pin logic levels are compatible with your controlling microcontroller or FPGA I/O standards to ensure proper activation and deactivation sequences.

Selection Notes

Select this component when a precise 77.863 MHz timing source is required in space-constrained designs. The 1.8V operating voltage makes it suitable for modern low-power digital logic families. Consider the enable/disable feature if dynamic power saving is necessary during idle periods. The small 4-SMD footprint allows for high-density PCB layouts compared to larger through-hole alternatives.

Part Context

This part belongs to the Mercury Electronics 18QHTF21 series of surface-mount crystal oscillators. The series offers various frequencies and supply voltages, all sharing a common compact 2.0x1.6mm package form factor. The 'OE' suffix typically denotes the enable/disable capability variant within this product line.

Replacement Considerations

Direct replacements must match the 77.863 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD no-lead package. Verify pinout compatibility and electrical characteristics such as phase noise and jitter specifications to ensure functional equivalence in the target application.