18QHTF21-13.768-PD

Overview

The 18QHTF21-13.768-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 13.768 MHz and utilizes LVCMOS output logic levels. The component requires a 1.8V supply voltage and features a standby mode for power down functionality. It is housed in a compact 4-SMD, No Lead package suitable for surface-mount assembly.

Feature Summary

• Supports low-voltage operation with 1.8V supply requirement
• Includes standby capability for power-down management
• Provides LVCMOS output signal compatibility

Applications

• Battery-powered electronic devices
• Portable consumer electronics
• General-purpose digital clock generation

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target circuit design before procurement. Confirm that the 1.8V operating voltage aligns with the system power rails. Ensure the 4-SMD no-lead package footprint matches the PCB layout specifications to guarantee proper soldering and mechanical stability during assembly processes.

Selection Notes

Select this oscillator when a precise 13.768 MHz reference is required for low-power applications. The 1.8V supply specification makes it suitable for modern portable devices where energy efficiency is critical. Consider the LVCMOS interface compatibility with the connected microcontroller or FPGA inputs to ensure signal integrity without additional level shifting components.

Part Context

This component belongs to the Mercury Electronics 18QHTF21 series of surface-mount crystal oscillators. The series offers various frequency options within a standardized 4-SMD package form factor. Mercury Electronics has specialized in quartz timing products since 1973, establishing itself as a pioneer in the Taiwan frequency-control industry with a focus on reliable oscillator manufacturing.

Replacement Considerations

Compatible substitutes include other 13.768 MHz LVCMOS oscillators from different manufacturers provided they match the 1.8V supply voltage and 4-SMD no-lead package dimensions. Verify pinout configurations and electrical characteristics such as phase noise and jitter specifications to ensure functional equivalence in the target application.