18QHTF21-28.140-PD

Oscillators Overview

The 18QHTF21-28.140-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 28.14 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a standby or power-down function to manage energy consumption. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm. This component serves as a precise clock source for digital circuits requiring low-profile surface-mount integration.

Oscillators Feature Summary

• Supports standby mode for power management
• Utilizes LVCMOS output logic levels
• Compact 4-SMD no lead package design

Oscillators Applications

• General purpose clock generation
• Digital circuit timing reference
• Embedded system clock sources

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target application's datasheet specifications. Confirm that the 1.8V supply voltage aligns with the system power rails. Ensure the PCB footprint matches the 2.0x1.6mm SMD package dimensions to guarantee proper soldering and mechanical stability during assembly processes.

Oscillators Selection Notes

Select this component when a low-voltage 1.8V operation is required alongside a standard LVCMOS interface. The choice is appropriate for applications prioritizing a small form factor due to the 4-SMD no lead package. Consider the availability of the standby feature if power efficiency during idle states is a critical design constraint for the electronic system.

Oscillators Part Context

This part belongs to the Mercury Electronics 18QHTF series of quartz crystal oscillators. The series offers various frequencies and voltage options, including 2.5V variants like the 25QHTF21 model. The 'PD' suffix indicates the inclusion of a power-down capability, distinguishing it from non-power-down versions within the same physical package family.

Oscillators Replacement Considerations

Direct substitutes include other 28.14 MHz LVCMOS oscillators in 4-SMD packages from Mercury Electronics, such as the 18QHTF21-28.140 without the PD suffix if power-down is not needed. Cross-manufacturer replacements require matching the 1.8V supply, LVCMOS output, and 2.0x1.6mm footprint.