18QHTF21-19.810-PD

Oscillators Overview

The 18QHTF21-19.810-PD is a crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 19.81 MHz with an LVCMOS output signal. The device functions at a supply voltage of 1.8V and includes a standby (power down) feature for energy management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6 mm. This component provides standard frequency generation suitable for digital circuits requiring precise timing signals.

Oscillators Feature Summary

• LVCMOS output interface for digital logic compatibility
• Integrated standby mode for power reduction
• Compact surface-mount package design

Oscillators Applications

• Digital clock signal generation
• Microcontroller system timing
• Communication interface synchronization

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target circuit design before procurement. Ensure the 1.8V supply voltage aligns with the system power rails. Confirm that the 4-SMD no-lead package footprint matches the PCB layout specifications to avoid assembly issues during manufacturing.

Oscillators Selection Notes

Select this component when a low-voltage, small-footprint oscillator is required for portable or space-constrained electronics. Consider the LVCMOS output level compatibility with downstream logic families. Evaluate the need for power-down functionality if battery life optimization is a critical design parameter for the application.

Oscillators Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz crystal frequency control products. The manufacturer has decades of experience in Taiwan's crystal industry. The series offers various frequencies within a standardized small outline package format, catering to modern electronic devices requiring reliable timing sources.

Oscillators Replacement Considerations

Direct substitutes must match the 19.81 MHz frequency, 1.8V operation, LVCMOS output, and 2.0x1.6mm package size. Verify pinout compatibility and electrical characteristics such as phase noise and stability before substitution.