18QHTF21-12.245-OE

Overview

The 18QHTF21-12.245-OE is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 12.245 MHz and utilizes LVCMOS output logic. The device supports a supply voltage of 3.3V and features an Enable/Disable control function. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm. The component complies with RoHS standards and has a Moisture Sensitivity Level (MSL) rating of 1, indicating unlimited floor life under normal conditions.

Feature Summary

• Integrates LVCMOS output logic for digital interface compatibility
• Includes hardware enable/disable functionality for power management
• Utilizes a leadless surface-mount package for automated assembly

Applications

• General clock signal generation in embedded systems
• Timing reference for microcontrollers and processors
• Digital communication interface synchronization

Procurement Notes

Verify the specific operating voltage requirement against the target circuit design, as variants exist for different voltage levels. Confirm the package footprint matches the PCB layout constraints. Ensure compliance with RoHS directives if required by the end product regulations. Check the MSL rating for proper storage and reflow soldering procedures during manufacturing.

Selection Notes

Select this component when a precise 12.245 MHz timing source is required in a minimal space-constrained environment. The choice depends on the need for LVCMOS compatibility and low-profile packaging. Consider the enable/disable feature if power efficiency is critical. Validate that the 3.3V supply aligns with the system's power rails before integration.

Part Context

This oscillator belongs to the QHTF series from Mercury Electronics, a manufacturer specializing in quartz crystals and frequency control products since 1973. The series offers various frequencies and packages. This specific model represents a standard XO variant designed for general-purpose applications requiring stable clock signals in consumer and industrial electronics.

Replacement Considerations

Direct substitutes include other 12.245 MHz LVCMOS oscillators in 2.0x1.6mm packages from compatible manufacturers. Verify pinout compatibility and electrical specifications before substitution. Cross-reference part numbers such as those from similar series within the same family if available.