18QHTF21-1.1389-OE

Overview

The 18QHTF21-1.1389-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fundamental frequency of 1.1389 MHz and utilizes LVCMOS output logic. The device requires a supply voltage of 1.8V and features an enable/disable control function for power 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-power electronic systems.

Feature Summary

• Integrates LVCMOS output logic for direct interfacing with digital circuits
• Includes enable/disable pin functionality to manage power consumption
• Utilizes a surface-mount 4-SMD no-lead package for automated assembly

Applications

• Clock signal generation for microcontrollers
• Timing reference for communication interfaces
• Low-power embedded system synchronization

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target circuit design before procurement. Confirm that the 1.8V supply voltage aligns with the system's power rails. Ensure the 4-SMD footprint matches the PCB layout constraints. Cross-reference the datasheet for operating temperature range specifications to guarantee reliability under intended environmental conditions.

Selection Notes

Select this component when a low-frequency, low-voltage clock source is required for space-constrained designs. The 1.8V operation makes it suitable for modern portable electronics. Consider the enable/disable feature if power efficiency is critical. Verify compatibility with LVCMOS logic levels of the receiving devices. Evaluate the small form factor against available board real estate.

Part Context

This part belongs to the 18QHTF21 series of crystal oscillators from Mercury Electronics. The series offers various frequencies and voltage options. The suffix -OE typically denotes specific packaging or ordering configurations. Mercury Electronics specializes in frequency control products, providing standardized solutions for industrial and consumer applications. This model represents a specific frequency variant within their broader portfolio.

Replacement Considerations

Direct substitutes must match the 1.1389 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package. Check equivalent parts from other manufacturers offering identical electrical characteristics and pinout compatibility. Ensure thermal and mechanical specifications align with the original design requirements.