18QHTF21-77.600-PD

Overview

The 18QHTF21-77.600-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a fixed frequency of 77.6 MHz and utilizes LVCMOS output logic levels. The component is designed for a supply voltage of 1.8V and features a power-down function accessible via a standby control input. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm. This surface-mount device is engineered for integration into electronic circuits requiring precise clock signals.

Feature Summary

• Generates a stable 77.6 MHz clock signal using LVCMOS output logic
• Operates on a single 1.8V power supply rail
• Includes a dedicated standby pin for power-down functionality
• Utilizes a small-footprint 4-SMD no-lead package design

Applications

• Digital system clock generation
• Data communication interface timing
• Microcontroller clock sources
• Embedded system synchronization

Procurement Notes

Verify the specific ordering suffix to ensure compatibility with required frequency tolerance and load capacitance specifications. Confirm that the 1.8V supply voltage aligns with the target circuit design. Ensure the PCB footprint matches the 2.0x1.6mm SMD package dimensions. Check for any specific reflow soldering profile requirements provided in the manufacturer's datasheet to maintain component integrity during assembly.

Selection Notes

Select this component when a low-voltage 1.8V operation is required for clock generation. The LVCMOS output is suitable for direct interfacing with standard digital logic families. Consider the physical size constraints as the 4-SMD package offers a minimal footprint. Verify that the operating temperature range meets the environmental conditions of the intended application before finalizing the selection.

Part Context

This part belongs to the 18QHTF21 series of surface-mount crystal oscillators from Mercury Electronic Ind. Co., Ltd. The series provides various frequency options within a standardized small package. The 'PD' suffix indicates the inclusion of a power-down feature. Mercury Electronics specializes in quartz crystals and frequency control products, offering solutions for diverse timing applications across consumer and industrial electronics.

Replacement Considerations

Direct replacements must match the 77.6 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package. Verify pinout compatibility and electrical characteristics such as current consumption and startup time. Consult the manufacturer's cross-reference list for approved substitute part numbers.