18QHTF21-7.675-PD

Overview

The 18QHTF21-7.675-PD is a standard crystal oscillator manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a frequency of 7.675 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a power-down (PD) control function to manage standby states. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6 mm. This component serves as a precise timing source for electronic circuits requiring low-power operation and small form factors.

Feature Summary

• Provides stable clock signals using LVCMOS output logic
• Supports power-down mode for energy efficiency
• Compact surface-mount design suitable for space-constrained applications

Applications

• General-purpose digital circuit timing
• Low-power embedded systems
• Consumer electronics requiring precise clock references

Procurement Notes

Verify the specific ordering suffix PD indicates the power-down feature when sourcing replacements. Confirm the operating temperature range and load capacitance requirements match the target circuit design. Ensure the 1.8V supply voltage aligns with the system's power rails before integration.

Selection Notes

Select this component when a low-voltage, small-footprint oscillator with power management capabilities is required. Consider the 7.675 MHz frequency against available alternatives if standard rates like 8MHz or 12MHz are acceptable. Evaluate the 4-SMD package compatibility with automated assembly processes.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronic, which specializes in quartz crystal oscillators. The series offers various frequencies and supply voltages, catering to diverse timing needs in modern electronics. Mercury Electronics has established itself as a supplier of frequency control products since 1973.

Replacement Considerations

Direct substitutes include other 7.675 MHz LVCMOS oscillators in 2.0x1.6mm packages with power-down functionality. Verify pinout compatibility and electrical specifications such as jitter and phase noise before substitution.