18QHTF21-21.477-OE

Oscillators Overview

The 18QHTF21-21.477-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 21.477 MHz and utilizes LVCMOS output logic. The device supports a supply voltage of 1.8V and features an enable/disable control function for power management. It is housed in a compact 4-SMD, No Lead package, designed for surface-mount applications requiring precise timing signals.

Oscillators Feature Summary

• LVCMOS output logic for digital interface compatibility
• Integrated enable/disable control functionality
• Surface-mount 4-SMD no lead package design

Oscillators Applications

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

Oscillators Procurement Notes

Verify the specific ordering suffix and frequency tolerance against the official datasheet before procurement. Ensure the 1.8V supply requirement aligns with the target system design. Confirm the 4-SMD package dimensions fit the PCB footprint constraints. Cross-reference the part number with the manufacturer's current production status to avoid obsolescence issues during sourcing.

Oscillators Selection Notes

Select this component when a low-voltage 1.8V operation is required alongside LVCMOS outputs. The enable/disable feature makes it suitable for power-sensitive designs. Consider the 4-SMD form factor for space-constrained layouts. Verify that the 21.477 MHz frequency meets the system clock requirements without additional dividers or multipliers.

Oscillators Part Context

This oscillator belongs to the Mercury Electronics XO series, which provides standard frequency control solutions. The brand specializes in quartz-based timing components, including crystals and oscillators. This specific model represents a surface-mount option within their portfolio, targeting modern electronics that require reliable clock signals in small footprints.

Oscillators Replacement Considerations

Check for direct substitutes with identical 21.477 MHz frequency, 1.8V supply, and LVCMOS output. Ensure any replacement maintains the 4-SMD package outline and enable/disable pin configuration. Verify thermal and electrical specifications match the original design constraints.