18QHTF21-69.740-PD

Overview

The 18QHTF21-69.740-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 69.74 MHz and utilizes LVCMOS output logic levels. The device is designed for operation with a supply voltage of 1.8V and includes a standby or power-down function to manage energy consumption. It is housed in a compact 4-SMD, no lead package, suitable for surface-mount applications requiring precise timing signals.

Feature Summary

• Supports low-voltage operation at 1.8V
• Includes standby and power-down functionality
• Provides LVCMOS output signal compatibility

Applications

• General-purpose digital timing circuits
• Embedded systems requiring precise clock sources
• Portable electronic 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 voltage aligns with your system's power rails. Ensure the 4-SMD no-lead package dimensions fit within your PCB layout constraints. Cross-reference the part number suffix PD with manufacturer documentation to confirm availability and specific manufacturing batch details.

Selection Notes

Select this component when a stable 69.74 MHz clock signal is required for LVCMOS-compatible logic families. Consider the 1.8V operating voltage if your system prioritizes low power consumption. The integrated power-down feature makes it suitable for battery-operated applications where standby current reduction is critical. Evaluate thermal performance and environmental stability requirements against the datasheet specifications.

Part Context

This oscillator belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz-based frequency control products. The series typically offers standard XO configurations with various frequency options. Mercury Electronics has extensive experience in Taiwan's quartz industry, providing reliable timing solutions for consumer and industrial electronics.

Replacement Considerations

Direct substitutes must match the 69.74 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD no-lead package. Verify pinout compatibility and electrical characteristics such as jitter and phase noise. Consult official cross-reference lists from Mercury Electronics or authorized distributors for validated alternative part numbers.