18QHTF21-1.8433-PD

Overview

The 18QHTF21-1.8433-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a fixed frequency of 1.8433 MHz and utilizes LVCMOS output logic. The device supports a supply voltage of 1.8V and includes a standby or power-down function for energy management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6mm.

Feature Summary

• LVCMOS output logic interface
• Integrated standby and power-down functionality
• Compact surface-mount package design

Applications

• Low-power embedded systems requiring precise timing
• Portable electronic devices utilizing 1.8V logic levels
• Communication modules needing stable clock signals

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Confirm that the 1.8V supply voltage aligns with your system's power rails. Ensure the 4-SMD no-lead package footprint matches your PCB layout constraints. Check for any specific reflow soldering profile recommendations provided in the official datasheet to ensure reliable assembly.

Selection Notes

Select this component when a low-voltage 1.8V operation is required alongside a standard LVCMOS interface. The integrated power-down feature makes it suitable for battery-operated applications where standby current reduction is critical. Consider the small 2.0x1.6mm footprint if space constraints are a primary design factor. Ensure the 1.8433 MHz frequency meets the specific timing needs of the target application.

Part Context

This part belongs to the 18QHTF21 series of oscillators from Mercury Electronic Ind. Co., Ltd. The series offers various frequencies and voltage options within a standardized small outline package. Mercury Electronics specializes in quartz crystal and frequency control products, leveraging decades of manufacturing expertise in Taiwan to produce reliable timing components for diverse electronic industries.

Replacement Considerations

Direct replacements must match the 1.8433 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm package. Verify pinout compatibility and electrical characteristics such as phase noise and jitter before substitution.