18QHTF21-124.400-OE

Overview

The 18QHTF21-124.400-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd, designed for high-frequency digital applications requiring precise clock signals. This component operates at a nominal frequency of 124.4 MHz and utilizes LVCMOS output logic to ensure compatibility with standard CMOS-based integrated circuits and microcontrollers. It functions within a supply voltage range of 3.3V, providing stable performance across industrial temperature conditions ranging from -40°C to +85°C. The device features an Enable/Disable control function, allowing for power management flexibility in system designs. Packaged in a compact 4-SMD, No Lead form factor, it offers low profile mounting suitable for space-constrained PCB layouts while maintaining reliable signal integrity.

Feature Summary

• LVCMOS output logic for direct interface with standard digital components
• Enable/Disable control functionality for dynamic power management
• Industrial temperature range operation ensuring reliability in harsh environments
• Compact 4-SMD no-lead package design for efficient board space utilization

Applications

• High-speed data communication interfaces requiring precise timing
• Digital signal processing systems needing stable clock sources
• Embedded computing platforms with strict power constraints
• Industrial control equipment operating in variable thermal conditions

Procurement Notes

Verify the specific suffix 'OE' against manufacturer documentation to confirm enable/disable functionality versus other variants like 'PD'. Ensure supply voltage requirements match the 3.3V specification rather than lower voltage options. Confirm package dimensions align with footprint design rules. Cross-reference frequency tolerance specifications if tight stability is required for the application.

Selection Notes

Choose this model when a 124.4 MHz clock signal is necessary with LVCMOS compatibility. Consider the 3.3V supply requirement compared to lower voltage alternatives. Evaluate the need for enable/disable controls versus always-on oscillators. Assess the industrial temperature range suitability against environmental conditions. Verify package size constraints against available PCB real estate.

Part Context

This oscillator belongs to the PTV series produced by Mercury Electronics, a company established in 1973 specializing in frequency control products. The brand is recognized as a pioneer in Taiwan's quartz crystal industry with extensive manufacturing history. The 18QHTF21 series represents standard XO solutions offering various frequencies and supply voltages for diverse electronic applications.

Replacement Considerations

Direct substitutes include the 18QHTF21-124.400-PD variant, which differs primarily in standby power down functionality instead of simple enable/disable. Other frequency-specific models within the same series may serve as functional replacements if frequency adjustments are acceptable.