18QHTF21-20.9715-PD

Oscillators Overview

The 18QHTF21-20.9715-PD is a quartz crystal oscillator manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a nominal frequency of 20.9715 MHz and utilizes LVCMOS output logic. The device supports a supply voltage range including 1.8V and features a standby (power down) function for energy management. It is housed in a compact 4-SMD, No Lead package, suitable for surface-mount applications requiring precise timing signals.

Oscillators Feature Summary

• Supports low-voltage operation with integrated power-down capability
• Provides stable LVCMOS clock signals for digital circuits
• Utilizes a leadless SMD package for automated assembly

Oscillators Applications

• Embedded system clock generation
• Communication interface timing
• Microcontroller peripheral synchronization

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target circuit design before procurement. Confirm that the 4-SMD no-lead package dimensions align with the PCB footprint constraints. Ensure the selected supply voltage matches the operational specifications to guarantee proper signal integrity and standby functionality.

Oscillators Selection Notes

Select this component when a precise 20.9715 MHz reference is required for low-power digital applications. Consider the LVCMOS output compatibility with downstream logic levels. Evaluate the thermal performance and operating temperature range to ensure reliability within the intended environmental conditions.

Oscillators Part Context

This oscillator belongs to the Mercury Electronics 18QHTF21 series, designed for general-purpose timing applications. The series offers various frequency options within a standardized small outline package. It serves as a direct replacement for standard crystal oscillators in space-constrained designs requiring high stability.

Oscillators Replacement Considerations

Direct substitutes must match the 20.9715 MHz frequency, LVCMOS output type, and 1.8V supply requirement. Verify pinout compatibility for the 4-SMD no-lead configuration. Cross-reference with other manufacturers' equivalent series ensuring identical electrical parameters and mechanical dimensions.