18QHTF21-7.680-OE

Overview

The 18QHTF21-7.680-OE is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 7.68 MHz and utilizes LVCMOS output logic levels. The device is designed for low-voltage applications, requiring a supply voltage of 1.8V. It features an enable/disable control function to manage power consumption. The component is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm. This surface-mount oscillator is suitable for timing applications requiring precise clock signals in space-constrained electronic designs.

Feature Summary

• Provides stable 7.68 MHz clock signal generation using LVCMOS output interface
• Operates on a single 1.8V power supply rail for low-voltage compatibility
• Includes hardware enable and disable functionality for power management control

Applications

• Digital signal processing circuits requiring precise clock synchronization
• Embedded systems utilizing low-voltage microcontrollers
• Communication modules needing stable frequency reference sources

Procurement Notes

Verify the specific ordering suffix matches the required frequency and voltage specifications. Confirm the package type aligns with the PCB footprint design. Ensure the enable pin configuration meets system power management requirements. Check temperature range ratings against operational environment constraints. Validate manufacturer authenticity through authorized distribution channels.

Selection Notes

Choose this oscillator when a 7.68 MHz frequency is specifically required for digital timing. Select based on the 1.8V supply voltage constraint of the target circuit. Consider the small 2.0x1.6mm footprint for dense board layouts. Evaluate the need for active enable control versus always-on operation. Compare performance against alternative frequencies if system flexibility allows.

Part Context

This component belongs to Mercury Electronics' standard XO series, focusing on quartz-based timing solutions. The brand specializes in frequency control products including crystals and oscillators. The 18QHTF21 series represents their surface-mount oscillator lineup designed for modern electronics. Mercury Electronic has established expertise in Taiwan's quartz manufacturing industry since 1973.

Replacement Considerations

Direct substitutes include other 7.68 MHz LVCMOS oscillators in 2016 packages from compatible manufacturers. Verify electrical parameters such as supply voltage and output logic levels match exactly. Check mechanical dimensions and pinout configurations for physical compatibility. Ensure thermal characteristics meet the application's operating temperature requirements.