18QHTF21-77.780-PD

Overview

The 18QHTF21-77.780-PD is a crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 77.78 MHz and utilizes LVCMOS output logic. The device functions with a supply voltage of 1.8V and includes a standby or power-down feature for energy management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6mm.

Feature Summary

• Supports low voltage operation at 1.8V
• Integrates standby mode for power reduction
• Provides standard LVCMOS signal output

Applications

• General clock generation in electronic circuits
• Systems requiring precise timing signals
• Portable devices utilizing low power components

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before ordering. Confirm that the 1.8V supply rail is stable and within the specified operating range to ensure reliable oscillator performance and longevity.

Selection Notes

Choose this component when a small form factor is required alongside low voltage compatibility. Ensure the application can accommodate the 4-SMD package size and that the LVCMOS interface matches the input specifications of the connected integrated circuit.

Part Context

This model belongs to the 18QHTF21 series from Mercury Electronics, which offers various frequencies in a miniature surface-mount package. The series is designed for applications demanding high stability and low power consumption in space-constrained environments.

Replacement Considerations

Check datasheets for compatible parts with identical 77.78 MHz frequency, 1.8V supply, and 4-SMD footprint. Verify pinout compatibility and electrical parameters such as phase noise and jitter before substituting.