18QHTF21-19.800-PD

Oscillators Overview

The 18QHTF21-19.800-PD is a 19.8 MHz crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It utilizes LVCMOS output logic and operates with a 1.8V supply voltage. The device 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

• LVCMOS output interface
• 1.8V operating voltage
• Standby power down capability

Oscillators Applications

• General purpose clock signal generation
• Digital system timing references
• Embedded electronics requiring low voltage operation

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Ensure the 1.8V supply rail is stable to maintain oscillator performance. Confirm the 4-SMD package dimensions fit within your PCB layout constraints. Cross-reference the datasheet for any specific testing conditions or derating guidelines provided by the manufacturer.

Oscillators Selection Notes

Select this component when a precise 19.8 MHz clock source is required with low voltage compatibility. Consider the LVCMOS output swing levels for interfacing with downstream digital logic. Evaluate the thermal management needs for the SMD package in the final assembly environment. Compare alternative frequencies if the exact 19.8 MHz value does not match the system clock tree requirements.

Oscillators Part Context

This part belongs to the 18QHTF21 series of standard crystal oscillators from Mercury Electronic. The series offers various frequency options including 8.0004 MHz, 51.2 MHz, and 80 MHz variants. All models in this family share similar packaging and electrical characteristics, differing primarily in their nominal output frequency.

Oscillators Replacement Considerations

Direct substitutes include other 19.8 MHz LVCMOS oscillators in 4-SMD packages. Verify pinout compatibility and voltage levels when considering alternatives from different manufacturers.