18QHTF21-12.1732-OE

Overview

The 18QHTF21-12.1732-OE is a fixed-frequency XO standard oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 12.1732 MHz with an LVCMOS output logic level. The device requires a supply voltage of 1.8V and features enable/disable functionality for power management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6 mm. The component supports surface mount technology and is designed for applications requiring precise timing signals within a specified operating temperature range.

Feature Summary

• Fixed frequency operation providing stable clock signals
• LVCMOS output interface compatible with standard digital logic
• Integrated enable and disable control for power optimization
• Compact surface-mount package design for space-constrained PCB layouts

Applications

• General purpose clock generation in embedded systems
• Timing reference for microprocessors and FPGAs
• Communication interface synchronization circuits
• Consumer electronics requiring precise timekeeping

Procurement Notes

Verify the exact frequency tolerance and load capacitance requirements against your specific circuit design before ordering. Confirm that the 1.8V supply voltage aligns with your system's power rails. Ensure the 2.0x1.6mm footprint matches your PCB land pattern. Check for any specific reflow soldering profile recommendations provided by the manufacturer to ensure reliable assembly and long-term performance stability.

Selection Notes

Select this component when a low-profile, surface-mount oscillator is required for 12.1732 MHz applications. Consider the LVCMOS output compatibility with your downstream logic family. Evaluate the power consumption implications of the enable/disable feature if battery life is critical. Compare the physical dimensions against available board space constraints. Verify that the operating temperature range meets the environmental conditions of the final product deployment.

Part Context

This part belongs to the 18QHTF21 series of crystal oscillators from Mercury Electronics Ind. Co. Ltd. The series offers various frequencies and packages, catering to diverse timing needs. Mercury Electronics is a established supplier of frequency control products, including quartz crystals and oscillators. This specific model represents a standard XO solution with integrated enable functionality, distinguishing it from basic continuous-output variants.

Replacement Considerations

Direct replacements must match the 12.1732 MHz frequency, 1.8V supply, LVCMOS output, and 2.0x1.6mm package. Verify pinout compatibility and electrical characteristics such as current consumption and start-up time. Cross-reference with other manufacturers offering similar SMD oscillators if Mercury parts are unavailable. Ensure substitute components meet the same thermal and reliability standards.