18QHTF21-69.972-PD

Overview

The 18QHTF21-69.972-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 69.972 MHz and utilizes LVCMOS output logic. The device requires a 1.8V supply voltage and features a power-down standby function for energy management. It is housed in a compact 4-SMD, no-lead package with dimensions of 2.0 x 1.6 mm. This component is designed for applications requiring precise timing signals within low-voltage digital systems.

Feature Summary

• Supports LVCMOS output logic for direct interface with digital circuits
• Includes power-down standby functionality to reduce consumption
• Utilizes a small form factor SMD package for surface mount assembly

Applications

• Battery-powered portable electronic devices
• Low-voltage digital signal processing systems
• Communication equipment requiring precise clock synchronization

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Confirm that the 1.8V supply rail is stable and within the operational limits specified in the official datasheet. Ensure compatibility with the LVCMOS logic levels used in your target application to prevent signal integrity issues.

Selection Notes

Select this model when a 69.972 MHz clock source is required in a space-constrained environment. The 1.8V operating voltage makes it suitable for modern low-power integrated circuits. Consider the 4-SMD package size if board real estate is limited. Verify thermal performance requirements as the device dissipates power during operation.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which offers various frequencies in a standardized 2.0x1.6mm footprint. The series typically supports LVCMOS outputs and includes power-down capabilities. Similar parts in the lineup differ primarily by their oscillation frequency while maintaining identical electrical and mechanical characteristics.

Replacement Considerations

Direct substitutes must match the 69.972 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD no-lead package. Check manufacturer cross-reference lists for equivalent models from other suppliers ensuring identical pinout and electrical specifications.