18QHTF21-76.0686-PD

Overview

The 18QHTF21-76.0686-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 76.0686 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a Standby (Power Down) control function to manage power consumption. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm. This component is engineered for reliable clock signal generation in electronic circuits requiring precise timing.

Feature Summary

• LVCMOS output logic for digital interface compatibility
• Integrated standby mode for power management
• Compact surface-mount package design

Applications

• General purpose clock signal generation
• Digital circuit timing reference
• Embedded system clock sources

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Ensure the 1.8V supply voltage aligns with your system's power rails. Confirm that the LVCMOS output levels are compatible with the receiving logic inputs. Check the physical footprint compatibility with your PCB layout to ensure proper soldering and mechanical stability during assembly processes.

Selection Notes

Select this component when a stable 76.0686 MHz clock source is required for low-voltage digital applications. The choice depends on the necessity for LVCMOS signaling and the availability of a 1.8V power supply. Consider the small form factor if space constraints are critical. Evaluate the need for power-down functionality to optimize system energy efficiency during idle periods compared to continuous operation alternatives.

Part Context

This part belongs to the 18QHTF21 series of surface-mount crystal oscillators from Mercury Electronics. The series typically offers various frequencies within a standardized 2.0x1.6mm package. These components are designed to replace discrete crystal and buffer combinations, providing a ready-to-use clock solution. The manufacturer leverages its expertise in quartz crystal production to deliver frequency control products with consistent performance characteristics across the product line.

Replacement Considerations

Direct substitutes must match the 76.0686 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD no-lead package. Verify pinout compatibility and electrical specifications such as phase noise and jitter if specified in original design documents. Cross-reference with other manufacturers offering similar SMD XO packages to ensure functional interchangeability without redesigning the host circuit board.