18QHTF21-21.300-OE

Oscillators Overview

The 18QHTF21-21.300-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a frequency of 21.3 MHz and utilizes LVCMOS output logic levels. The device supports an enable/disable control function via a 1.8V supply voltage. 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 interface
• Enable/Disable control capability
• Compact SMD form factor

Oscillators Applications

• Digital signal processing circuits
• Communication equipment timing
• Microcontroller clock sources

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the official datasheet before integration. Confirm that the 1.8V operating voltage aligns with the target system power rails. Ensure the 4-SMD no-lead package dimensions match the PCB footprint design to prevent assembly errors during manufacturing.

Oscillators Selection Notes

Select this component when a low-voltage 1.8V operation is required alongside standard LVCMOS compatibility. The enable/disable feature allows for power management in battery-operated devices. Consider the 21.3 MHz frequency specifically for applications needing this exact clock rate rather than standard frequencies like 25 MHz or 50 MHz.

Oscillators Part Context

This part belongs to the Mercury 18QHTF21 series of surface-mount oscillators. The series offers various frequency options within a small footprint. Mercury Electronics specializes in quartz-based frequency control products, providing reliable timing solutions for consumer electronics and industrial applications through standardized packaging.

Oscillators Replacement Considerations

Direct substitutes include other 21.3 MHz LVCMOS oscillators in 4-SMD packages from manufacturers such as Epson, SiTime, or TXC. Verify pinout compatibility and electrical specifications before substitution. Cross-reference with the 18QHTF21 series variants if different frequencies are acceptable.