18QHTF21-77.700-PD

Overview

The 18QHTF21-77.700-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a frequency of 77.7 MHz and utilizes LVCMOS output logic levels. The device supports a standby or power-down function and is powered by a 1.8V supply voltage. It is housed in a compact 4-SMD, No Lead package, designed for surface-mount applications requiring precise clock signals.

Feature Summary

• Supports low-voltage operation with 1.8V supply
• Includes standby and power-down functionality
• Delivers LVCMOS output signal

Applications

• Digital signal processing systems
• Communication equipment clocking
• Embedded system timing references

Procurement Notes

Verify the exact frequency specification against official datasheets, as similar models exist with different frequencies such as 77.76 MHz. Confirm the operating voltage and package type match the design requirements before procurement to ensure compatibility with the target circuit.

Selection Notes

Select this component when a 77.7 MHz clock source with LVCMOS output is required. Ensure the application supports the 1.8V supply voltage and requires a surface-mount solution. Verify that the standby feature aligns with power management strategies.

Part Context

This part belongs to the Mercury Electronics XO series, which includes various frequencies and voltage options. The manufacturer specializes in quartz crystals and frequency control products, offering oscillators like TCXOs and VCXOs alongside standard XOs.

Replacement Considerations

Check for direct substitutes within the same series, such as the 18QHTF21-77.760-PD, but verify frequency differences. Other Mercury models with compatible packages and voltages may serve as alternatives if electrical parameters match.