18QHTF21-11.19744-OE

Overview

The 18QHTF21-11.19744-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 11.19744 MHz and utilizes LVCMOS output logic. The device is designed for low-voltage applications with a supply voltage of 1.8V. It features an enable/disable control function to manage power consumption. The component is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm. This series is engineered for precision timing requirements in portable and space-constrained electronic systems.

Feature Summary

• Integrated enable/disable functionality for power management
• Compact 4-SMD no-lead surface mount package design
• LVCMOS output logic compatible with digital circuits
• Low voltage operation optimized for battery-powered devices

Applications

• Portable consumer electronics requiring precise clock signals
• Communication modules needing stable frequency references
• Embedded systems with limited board space constraints
• Battery-operated devices utilizing low-power oscillators

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 package footprint matches your PCB layout guidelines. Check for any specific environmental operating temperature ranges required by your application standards. Validate compatibility with LVCMOS input thresholds of the receiving components.

Selection Notes

Select this component when a small form factor oscillator is required for 1.8V logic systems. Consider the enable pin feature if dynamic power saving is necessary. Evaluate the 11.19744 MHz frequency against available alternatives like 11.044 MHz or 11.0592 MHz depending on baud rate needs. Assess the trade-off between size and performance metrics such as phase noise if specified in detailed datasheets. Ensure the manufacturing date code meets project timeline requirements.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz crystal products. The manufacturer has decades of experience in Taiwan's crystal industry. Similar parts in this family include variants with different frequencies such as 11.044 MHz or 31.744 MHz. All share the same physical package and electrical interface characteristics while differing primarily in their nominal output frequency specifications.

Replacement Considerations

Direct substitutes within the same series include 18QHTF21-11.044-OE and 18QHTF21-11.0044-OE, provided the frequency difference is acceptable for the application. Cross-brand replacements require careful verification of pinout compatibility, voltage levels, and output logic types. Ensure any alternative maintains the 4-SMD no-lead package dimensions to fit existing footprints.