18QHTF21-19.4444-PD

Oscillators Overview

The 18QHTF21-19.4444-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 19.4444 MHz and utilizes LVCMOS output logic levels. The device is designed for low-voltage applications, functioning at a supply voltage of 1.8V. It features a power-down capability, allowing the unit to enter a standby mode to reduce power consumption when not in active use. The component is housed in a compact 4-SMD, No Lead package, suitable for surface-mount assembly processes.

Oscillators Feature Summary

• Supports LVCMOS output interface for digital signal compatibility
• Includes power-down functionality for standby mode operation
• Designed for low-voltage 1.8V supply environments

Oscillators Applications

• General-purpose clock signal generation
• Digital circuit timing references
• Embedded system clock sources

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the official datasheet before procurement. Confirm that the 1.8V supply voltage aligns with the target circuit design. Ensure the 4-SMD no-lead package dimensions match the PCB footprint. Check for RoHS compliance status if environmental regulations apply to the final product assembly.

Oscillators Selection Notes

Select this component when a precise 19.4444 MHz clock source is required for LVCMOS-compatible circuits. The choice is driven by the need for low-voltage operation at 1.8V and the inclusion of a power-down feature for energy management. The small 4-SMD form factor makes it suitable for space-constrained designs requiring surface-mount technology integration.

Oscillators Part Context

This part belongs to the Mercury Electronics XO series, which focuses on quartz-based frequency control products. Mercury Electronic has a long history in manufacturing quartz crystals and oscillators, positioning itself as a pioneer in the Taiwan crystal industry. The company produces various frequency control solutions including TCXOs and VCXOs alongside standard oscillators.

Oscillators FAQ

What is the output logic type for this oscillator?

The 18QHTF21-19.4444-PD uses LVCMOS (Low Voltage Complementary Metal-Oxide-Semiconductor) output logic.

Does this component support power management features?

Yes, the device includes a standby or power-down function to reduce power consumption when the oscillator is not actively needed.