18QHTF21-57.747-PD

Overview

The 18QHTF21-57.747-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 57.747 MHz and utilizes LVCMOS output logic. The device is designed for low-voltage applications, requiring a supply voltage of 1.8V. It features a standby mode that supports power-down functionality to reduce energy consumption during idle periods. The component is housed in a compact 4-SMD, No Lead package, suitable for surface-mount assembly on printed circuit boards.

Feature Summary

• Supports LVCMOS output logic for digital interface compatibility
• Includes standby mode with power-down capability
• Operates on a 1.8V supply voltage

Applications

• Digital signal processing systems
• Communication equipment requiring precise clock timing
• Embedded systems utilizing LVCMOS interfaces

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target system design before procurement. Confirm that the 1.8V supply rail is stable and within the operational limits specified in the official datasheet. Ensure the PCB footprint matches the 4-SMD, No Lead package dimensions to guarantee proper soldering and mechanical stability during assembly processes.

Selection Notes

Select this component when a 57.747 MHz clock source is required with LVCMOS compatibility. The 1.8V operating voltage makes it suitable for modern low-power digital circuits. Consider the standby feature if power management is critical. Verify that the 4-SMD package size fits within the available board space constraints for the intended application.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics Ind. Co. Ltd, which manufactures frequency control products. The series includes various frequencies such as 68.665 MHz and 51.2 MHz, all sharing similar packaging and electrical characteristics like 1.8V operation and LVCMOS outputs. The manufacturer has a history of producing quartz crystals and oscillators since 1973.

Replacement Considerations

Direct substitutes include other 18QHTF21 series parts with different frequencies, such as 18QHTF21-68.665-PD or 18QHTF21-51.200-PD, provided the frequency difference is acceptable for the application. Cross-brand replacements require matching LVCMOS logic, 1.8V supply, and 4-SMD package dimensions.