18QHTF21-3.68646-OE

Oscillators Overview

The 18QHTF21-3.68646-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 3.68646 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 suitable for surface-mount applications. The unit maintains a frequency stability of ±50ppm and functions within an operating temperature range of -40°C to 85°C. Maximum current consumption is specified at 24mA.

Oscillators Feature Summary

• Supports active enable and disable control for efficient power management
• Delivers LVCMOS output signals compatible with standard digital interfaces
• Utilizes a leadless SMD package design for automated surface-mount assembly

Oscillators Applications

• Embedded systems requiring precise timing references
• Consumer electronics utilizing low-voltage logic families
• Industrial control modules operating in extended temperature ranges

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target circuit design before procurement. Confirm that the 1.8V supply rail can maintain stable voltage under peak current conditions. Ensure the PCB footprint matches the 4-SMD no-lead package dimensions provided in the official datasheet. Check for any specific reflow soldering profile recommendations to prevent thermal damage to the quartz resonator during assembly processes.

Oscillators Selection Notes

Select this component when a low-frequency, high-stability clock source is required for 1.8V logic circuits. Consider the ±50ppm stability specification to ensure compatibility with communication protocols sensitive to jitter. Evaluate the enable/disable feature if system-level power conservation is a priority. Compare the physical dimensions of the 4-SMD package against available board space constraints to ensure proper mechanical fitment alongside adjacent components.

Oscillators Part Context

This oscillator belongs to the QHTF series from Mercury Electronic, designed for general-purpose timing applications. The series offers various frequency options within a standardized small outline package format. Mercury Electronic specializes in quartz-based frequency control products, providing solutions for consumer and industrial markets. This specific model represents a standard XO variant optimized for cost-effective integration into mass-produced electronic devices requiring reliable clock generation.

Oscillators Replacement Considerations

Direct substitutes include other 18QHTF21 series variants with identical pinouts and electrical characteristics but different frequencies. Cross-reference models from the same manufacturer family to ensure compatibility with existing firmware timing expectations. Verify that alternative sources offer equivalent ±50ppm stability and LVCMOS output levels to maintain signal integrity without redesigning the host circuitry.