18QHTF21-13.568-PD

Overview

The 18QHTF21-13.568-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 13.568 MHz and utilizes LVCMOS output logic levels. The device requires a 1.8V supply voltage and features a standby or power-down function for energy management. It is housed in a compact 4-SMD, no lead package with dimensions of 2.0x1.6mm. This component is designed for applications requiring precise timing signals with low power consumption.

Feature Summary

• Supports standby and power-down modes for reduced power consumption
• Utilizes LVCMOS output interface for digital compatibility
• Compact 4-SMD no lead package design

Applications

• Battery-powered portable devices
• General electronic systems requiring 13.568 MHz clock signals
• Low power consumer electronics

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Ensure the 1.8V supply rail stability meets the oscillator's specifications. Confirm that the PCB footprint matches the 4-SMD no lead package dimensions to ensure proper assembly and electrical connection during manufacturing.

Selection Notes

Select this model when a 13.568 MHz clock source is required with strict power constraints. The 1.8V operation makes it suitable for modern low-voltage digital circuits. Consider the standby feature if power management is critical. Compare size constraints against other available packages to ensure the 2.0x1.6mm form factor fits the design layout.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which offers various frequencies within the same package. The series includes models like 18QHTF21-68.665-PD and 18QHTF21-51.200-PD. Mercury Electronic has been a manufacturer of quartz crystals and oscillators since 1973, establishing itself as a pioneer in the Taiwan crystal industry with a long history of frequency control product manufacturing.

Replacement Considerations

Direct substitutes may include other 18QHTF21 series variants with different frequencies if the clock requirement changes. Cross-reference with similar 4-SMD no lead LVCMOS oscillators from other manufacturers if Mercury Electronics parts are unavailable. Ensure replacement parts match the 1.8V supply and pinout configuration.