18QHTF21-21.300-PD

Oscillators Overview

The 18QHTF21-21.300-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 21.3 MHz and utilizes LVCMOS output logic levels. The device is designed for operation with a supply voltage of 1.8V and includes a standby or power-down function to manage energy consumption during inactive periods. The component is housed in a compact 4-SMD, No Lead package, suitable for surface-mount assembly on printed circuit boards.

Oscillators Feature Summary

• Supports low-voltage operation at 1.8V
• Features LVCMOS output interface
• Includes standby power-down capability

Oscillators Applications

• Digital signal processing systems
• Communication equipment timing
• Embedded microcontroller clock sources

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the official datasheet before procurement. Confirm that the 1.8V supply voltage aligns with the target system design. Ensure the 4-SMD no-lead package dimensions fit within the available PCB footprint constraints. Check for any specific reflow soldering profile recommendations provided by the manufacturer to ensure reliability.

Oscillators Selection Notes

Select this component when a precise 21.3 MHz clock source is required for LVCMOS-compatible digital circuits. Consider the 1.8V operating voltage as a primary constraint for power-sensitive designs. Evaluate the need for standby functionality to optimize system power management. Compare physical size requirements against other available packages to ensure mechanical compatibility with the intended application environment.

Oscillators Part Context

This part belongs to the Mercury Electronics 18QHTF21 series of surface-mount crystal oscillators. The series offers various frequency options while maintaining consistent electrical characteristics and package dimensions. The 'PD' suffix typically indicates the inclusion of a power-down feature, distinguishing it from standard continuous-operation variants within the same family.

Oscillators Replacement Considerations

Direct substitutes must match the 21.3 MHz frequency, LVCMOS output, 1.8V supply, and 4-SMD package. Verify pinout compatibility and thermal characteristics before substitution.