18QHTF21-75.580-PD

Overview

The 18QHTF21-75.580-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a fixed frequency of 75.58 MHz and utilizes LVCMOS output logic. The device is designed for low-voltage applications, requiring a supply voltage of 1.8V. It features a power-down capability via a standby function to reduce energy consumption during inactive periods. The component is housed in a compact 4-SMD, No Lead surface-mount package with dimensions of 2.00mm x 1.60mm.

Feature Summary

• LVCMOS output logic for digital interface compatibility
• Integrated standby mode for power management
• Compact 4-SMD no-lead surface mount footprint

Applications

• General clock signal generation in embedded systems
• Timing reference for digital communication interfaces
• Power-sensitive portable electronic devices

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the system design specifications before procurement. Confirm that the 1.8V supply rail is stable and within the operational limits defined in the official datasheet. Ensure the PCB layout supports the 4-SMD no-lead package dimensions to guarantee reliable soldering and thermal performance during assembly.

Selection Notes

Select this component when a precise 75.58 MHz timing source is required for LVCMOS-compatible circuits. The choice is driven by the need for low-power operation due to the integrated standby feature and the constraint of limited board space necessitating the small 2.0x1.6mm package. Consider the manufacturer's history in quartz crystal production for reliability assurance.

Part Context

This oscillator belongs to the 18QHTF21 series from Mercury Electronic Ind. Co., Ltd, a company established in 1973 and recognized as a pioneer in Taiwan's quartz crystal industry. The series typically includes various frequencies and voltage options, such as 1.8V variants, catering to modern low-power electronics. Mercury Electronics manufactures a range of frequency control products including TCXOs and OCXOs.

Replacement Considerations

Direct substitutes include other 75.58 MHz LVCMOS oscillators in 4-SMD packages from compatible manufacturers. Verify pinout compatibility and electrical parameters. Cross-reference part numbers like those in the same Mercury series for alternative frequencies if the exact frequency is not critical.