18QHTF21-19.440-PD

Oscillators Overview

The 18QHTF21-19.440-PD is a 19.44 MHz crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a supply voltage of 1.8V and utilizes LVCMOS output logic. The device features a standard frequency stability specification and includes a standby or power-down function for energy management. It is housed in a compact 4-SMD, No Lead surface-mount package with dimensions of 2.0x1.6 mm. The component supports an operating temperature range of -40°C to 85°C and has a maximum supply current of 26mA.

Oscillators Feature Summary

• Supports low-voltage operation at 1.8V with LVCMOS output compatibility
• Integrates a standby mode for effective power management
• Utilizes a compact 4-SMD no-lead surface-mount package design

Oscillators Applications

• High-speed data communication interfaces requiring precise clocking
• Portable electronic devices necessitating low power consumption
• Embedded systems utilizing LVCMOS logic families

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Confirm that the 1.8V supply rail is stable within the specified operating temperature range of -40°C to 85°C. Ensure the PCB footprint matches the 2.0x1.6 mm SMD package dimensions to guarantee proper solder joint integrity and mechanical reliability during assembly.

Oscillators Selection Notes

Select this component when a 19.44 MHz clock source is required for LVCMOS-compatible digital circuits. The choice is driven by the need for a small form factor and low voltage operation. Consider the ±50ppm stability typical for this series if applicable to your timing budget. Evaluate the 26mA current draw against system power constraints to ensure efficient energy usage in battery-operated applications.

Oscillators Part Context

This part belongs to the 18QHTF21 series of crystal oscillators from Mercury Electronics. The series is characterized by its use of standard XO technology and LVCMOS outputs. Mercury Electronic specializes in frequency control products, including quartz crystals and various oscillator types, leveraging decades of manufacturing experience in Taiwan to produce reliable timing components for industrial and consumer electronics.

Oscillators Replacement Considerations

Direct substitutes include other 19.44 MHz LVCMOS oscillators in 4-SMD packages with compatible 1.8V supply voltages. Verify pinout compatibility and thermal characteristics when replacing. Cross-reference with similar Mercury models such as the 18QHTF21-18.440-PD if frequency adjustments are permissible.