18QHTF21-12.67917-OE

Overview

The 18QHTF21-12.67917-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 12.67917 MHz and utilizes LVCMOS output logic levels. The device is designed for surface mount applications, featuring a compact 4-SMD, No Lead package configuration. It supports an operating temperature range of -40°C to 85°C and maintains a frequency stability of ±50ppm. The component requires a 1.8V supply voltage and includes enable/disable functionality. Maximum supply current is specified at 22mA.

Feature Summary

• Supports enable and disable control functions for power management
• Utilizes LVCMOS output interface for digital compatibility
• Designed for high-reliability surface mount assembly

Applications

• Digital signal processing systems requiring precise clock timing
• Communication equipment utilizing standard frequency references
• Embedded controllers needing low-power oscillator solutions

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 no-lead package dimensions fit within your PCB footprint constraints. Check for any specific reflow soldering profile recommendations provided in the official datasheet to maintain component integrity during assembly processes.

Selection Notes

Select this component when a stable 12.67917 MHz reference is required for LVCMOS-compatible digital circuits. Consider the ±50ppm stability specification for applications sensitive to minor frequency drift over temperature variations. The enable/disable feature makes it suitable for battery-powered devices where power conservation is critical. Evaluate the 22mA maximum current consumption against your total system power budget to ensure efficient operation under all load conditions.

Part Context

This oscillator belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz-based frequency control products. The manufacturer has extensive experience in producing crystals, oscillators, and filters. This specific model represents a standard XO variant optimized for general-purpose timing applications in consumer and industrial electronics, leveraging established manufacturing techniques for consistent performance.

Replacement Considerations

Direct substitutes must match the 12.67917 MHz frequency, LVCMOS output type, 1.8V supply, and 4-SMD package. Verify equivalent stability and temperature range specifications. Cross-reference pinout configurations to ensure compatibility without PCB redesign.