18QHTF21-7.776-PD

Overview

The 18QHTF21-7.776-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 7.776 MHz and utilizes LVCMOS output logic. The device requires a 1.8V supply voltage and features a standby power-down mode for energy efficiency. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm.

Feature Summary

• LVCMOS output logic for digital interface compatibility
• Integrated standby power-down functionality
• Compact surface-mount package design

Applications

• General-purpose clock signal generation
• Low-power embedded systems
• Digital circuit timing references

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your system design before procurement. Confirm that the 1.8V supply voltage aligns with your target platform's power rails. Ensure the 4-SMD footprint matches your PCB layout constraints to avoid assembly issues.

Selection Notes

Select this component when a precise 7.776 MHz reference is required for low-voltage applications. Consider the LVCMOS output level compatibility with downstream logic families. Evaluate the power consumption benefits of the standby mode if battery operation or thermal management is a priority for the final product.

Part Context

This part belongs to the 18QHTF21 series of crystal oscillators from Mercury Electronics. The series offers various frequencies within a standardized 2.0mm x 1.6mm package. These components are designed for space-constrained electronics requiring reliable timing signals with minimal power draw.

Replacement Considerations

Direct substitutes include other 7.776 MHz LVCMOS oscillators in a 4-SMD 2.0x1.6mm package with 1.8V operation. Verify pinout compatibility and electrical specifications such as jitter and stability before swapping.