18QHTF21-21.6419-PD

Oscillators Overview

The 18QHTF21-21.6419-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 21.6419 MHz with a frequency stability of 50 ppm. The device utilizes LVCMOS output logic and supports a standby or power-down function. It is designed for operation with a supply voltage of 1.8V. The component is housed in a compact 4-SMD, No Lead package with a maximum seated height of 0.031 inches.

Oscillators Feature Summary

• Supports standby mode for power management
• LVCMOS output interface
• Compact surface-mount packaging

Oscillators Applications

• General electronic circuits requiring precise timing
• Data communication systems
• Consumer electronics devices

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 voltage aligns with the system's power rails. Ensure the 4-SMD footprint matches the PCB layout constraints. Check for any specific handling instructions regarding electrostatic discharge sensitivity during assembly.

Oscillators Selection Notes

Select this component when a low-voltage, small-form-factor oscillator is required for applications needing 21.6419 MHz timing. Consider the 50 ppm stability requirement to ensure it meets the system's clock accuracy needs. Evaluate the power consumption implications of the standby feature if battery life is a critical factor in the design.

Oscillators Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which specializes in quartz-based frequency control products. The manufacturer has decades of experience in producing crystals and oscillators. This series typically offers various frequencies and packages to suit different embedded system requirements.

Oscillators Replacement Considerations

Direct substitutes must match the 21.6419 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package dimensions. Verify compatibility with the 50 ppm stability specification. Cross-reference with other manufacturers offering similar SMD oscillators ensuring identical pinout and electrical characteristics.