18QHTF21-100.000-PD

Overview

The 18QHTF21-100.000-PD is a crystal oscillator (XO) manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a frequency of 100.0 MHz and utilizes LVCMOS output logic. The device is designed for 1.8V supply voltage operation and includes a standby or power-down function to manage power consumption. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm. The component is supplied in a strip packaging format.

Feature Summary

• Supports low-voltage 1.8V operation for energy-efficient applications
• Integrates a standby mode for effective power management
• Features a compact surface-mount footprint suitable for space-constrained designs

Applications

• Digital signal processing systems requiring precise clocking
• Communication equipment utilizing standard logic interfaces
• Embedded systems with strict size limitations

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Confirm that the 1.8V supply rail is stable and within the operational limits specified by the manufacturer. Ensure the PCB layout accommodates the 2.0x1.6mm SMD package dimensions correctly to maintain signal integrity and mechanical stability during assembly.

Selection Notes

Select this component when a 100.0 MHz clock source is required with LVCMOS compatibility. Consider the 1.8V operating voltage constraint compared to other voltage options like 3.3V available in similar form factors. Evaluate the need for power-down functionality if battery life or thermal management is critical. Compare physical dimensions against existing board space constraints.

Part Context

This part belongs to the 18Q series of oscillators from Mercury Electronics, characterized by small 2.0x1.6mm packages and 1.8V operation. The series offers various frequencies, including 51.2 MHz and 8 MHz variants, sharing similar electrical characteristics and pin configurations. It serves as a standard timing solution for modern digital electronics requiring reliable clock signals.

Replacement Considerations

Direct substitutes include other 100.0 MHz XO components in 4-SMD No Lead packages with 1.8V LVCMOS outputs. Verify pinout compatibility and electrical specifications such as jitter and phase noise before substitution. Alternative frequencies in the same package may require firmware adjustments.