18QHTF21-21.440-PD

Oscillators Overview

The 18QHTF21-21.440-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 21.44 MHz and utilizes LVCMOS output logic levels. The device is designed for a supply voltage of 1.8V and features a standby mode for power down functionality. It is housed in a compact 4-SMD, No Lead package suitable for surface mount applications.

Oscillators Feature Summary

• Supports low voltage operation with 1.8V supply requirement
• Includes standby capability for power management
• Utilizes LVCMOS output interface for digital compatibility

Oscillators Applications

• General purpose clock signal generation
• Embedded system timing references
• Digital circuit synchronization

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your design specifications before procurement. Ensure the 1.8V supply rail stability meets the oscillator's operational needs. Confirm that the 4-SMD no-lead package dimensions align with your PCB footprint constraints to ensure proper assembly and reliability.

Oscillators Selection Notes

Select this component when a precise 21.44 MHz reference is required with low power consumption. Consider the LVCMOS output compatibility with downstream logic families. Evaluate the need for standby functionality in battery-powered or energy-efficient designs. Compare against other frequencies in the 18QHTF21 series if different timing standards are needed.

Oscillators Part Context

This model belongs to the 18QHTF21 series of standard crystal oscillators from Mercury Electronics. The series offers various frequency options while maintaining consistent package and electrical characteristics. Mercury Electronics has a long history in quartz crystal manufacturing, providing reliable frequency control solutions.

Oscillators Replacement Considerations

Direct substitutes within the same series include models such as 18QHTF21-51.200-PD or 18QHTF21-121.500-PD, provided the frequency difference is acceptable for the application. Verify pinout and package compatibility when cross-referencing.