18QHTF21-69.8693-PD

Overview

The 18QHTF21-69.8693-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a fixed frequency of 69.8693 MHz and utilizes LVCMOS output logic. The device is designed for low-voltage applications with a supply voltage of 1.8V. It features a standby mode for power down functionality to reduce energy consumption during idle periods. The component is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6 mm, suitable for surface-mount assembly.

Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Includes standby mode capability for power-down operation
• Utilizes a compact 4-SMD no-lead surface-mount package

Applications

• General-purpose clock signal generation in electronic circuits
• Timing reference sources for digital systems requiring 1.8V operation
• Embedded devices utilizing surface-mount technology constraints

Procurement Notes

Verify the specific ordering suffix PD against official Mercury Electronics documentation to confirm package type and tape-and-reel specifications. Ensure the required frequency tolerance and load capacitance match the target circuit design requirements before procurement. Cross-reference the datasheet for absolute maximum ratings to prevent operational damage.

Selection Notes

Select this component when a precise 69.8693 MHz timing source is required within space-constrained designs. The 1.8V supply requirement makes it suitable for modern low-power digital logic families. Consider the LVCMOS output swing levels to ensure compatibility with downstream input thresholds of the connected integrated circuits.

Part Context

This part belongs to the Mercury Electronics 18QHTF21 series of surface-mount crystal oscillators. The series offers various frequencies and supply voltages, typically ranging from 1.8V to 3.3V. The 18QHTF21 designation indicates a standard XO format with a small footprint, distinguishing it from larger through-hole or hermetically sealed variants offered by the manufacturer.

Replacement Considerations

Direct substitutes must match the 69.8693 MHz frequency, 1.8V supply, LVCMOS output, and 2.0x1.6mm package. Verify pinout compatibility and electrical characteristics such as phase noise and jitter against the original specification sheet.