18QHTF21-1.664-PD

Overview

The 18QHTF21-1.664-PD is a crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 1.664 MHz with LVCMOS output logic. The device requires a 1.8V supply voltage and features a Standby (Power Down) control function. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm.

Feature Summary

• Integrates LVCMOS output logic for standard digital interface compatibility
• Includes standby functionality to reduce power consumption during idle states
• Utilizes a low-profile surface-mount package suitable for space-constrained designs

Applications

• Battery-powered portable electronic devices
• Low-power embedded systems requiring precise timing
• Consumer electronics with strict size limitations

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the official datasheet before procurement. Ensure the 1.8V supply rail stability meets the component's operational specifications. Confirm that the 4-SMD no-lead package footprint matches the PCB layout design to avoid assembly issues.

Selection Notes

Select this component when a low-frequency, low-voltage oscillator with power-down capability is required. The 1.664 MHz frequency suits applications needing sub-MHz or low-MHz clock signals. Consider the 2.0x1.6mm package size for high-density board layouts where larger oscillators cannot fit.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronic, designed for general-purpose timing applications. The series typically offers various frequencies within the low MHz range. The 'PD' suffix indicates the inclusion of a power-down pin for energy management.

Replacement Considerations

Direct substitutes must match the 1.664 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm package. Verify equivalent electrical parameters such as jitter and phase noise if critical to the application.