18QHTF21-40.200-PD

Oscillators Overview

The 18QHTF21-40.200-PD is a 40.2 MHz crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It utilizes LVCMOS output logic and operates at a supply voltage of 1.8V. The device features a Standby function for power down capabilities. It is housed in a compact 4-SMD, No Lead package suitable for surface mount applications.

Oscillators Feature Summary

• LVCMOS output logic interface
• Integrated standby mode for power management
• Surface mount 4-SMD no lead package

Oscillators Applications

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

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the official datasheet before procurement. Ensure the 1.8V supply voltage aligns with the target system design. Confirm the 4-SMD package dimensions fit the PCB footprint constraints. Check for any specific ordering suffixes that may alter electrical characteristics or packaging type.

Oscillators Selection Notes

Select this component when a low-voltage 1.8V operation is required alongside LVCMOS compatibility. The integrated standby feature supports power-sensitive designs. Consider the 4-SMD form factor for space-constrained layouts. Validate that the 40.2 MHz frequency meets the precise timing needs of the application without requiring external dividers.

Oscillators Part Context

This part belongs to the 18QHTF21 series of standard crystal oscillators from Mercury Electronics. The series offers various frequencies including 6 MHz, 51.2 MHz, and 96.768 MHz. All variants share similar electrical specifications such as 1.8V operation and LVCMOS outputs, differing primarily in their nominal frequency and package orientation.

Oscillators Replacement Considerations

Direct substitutes include other 18QHTF21 series parts like 18QHTF21-51.200-PD or 18QHTF21-6.000-PD if frequency adjustment is acceptable. Cross-brand replacements require matching LVCMOS logic, 1.8V supply, and 4-SMD package dimensions.