18QHTF21-8.784-PD

Overview

The 18QHTF21-8.784-PD is a standard LVCMOS oscillator manufactured by Mercury Electronic Ind., Co., Ltd. It operates at a frequency of 8.784 MHz with a supply voltage of 1.8V. The device features a maximum supply current of 21 mA and maintains a frequency stability of ±50 ppm. It supports a standby power-down function and is designed for surface mount installation within an operating temperature range of -40°C to +85°C.

Feature Summary

• Generates a precise 8.784 MHz clock signal using LVCMOS output logic levels.
• Incorporates a standby mode that allows for power-down functionality to reduce consumption.
• Ensures stable operation across industrial temperatures with ±50 ppm frequency tolerance.

Applications

• Digital signal processing systems requiring precise timing references
• Communication equipment utilizing standard clock frequencies
• Embedded control circuits in consumer electronics

Procurement Notes

Verify the specific frequency tolerance and package dimensions against the official datasheet before integration. Confirm that the 1.8V supply requirement aligns with the target circuit design. Ensure the surface-mount footprint matches the PCB layout constraints. Check for any specific handling requirements related to electrostatic discharge during assembly.

Selection Notes

Select this component when a low-voltage, surface-mount oscillator is required for applications needing 8.784 MHz precision. Consider the ±50 ppm stability for general-purpose digital timing needs. Evaluate the 21 mA current draw against system power budgets. Verify compatibility with LVCMOS input thresholds of the receiving logic devices.

Part Context

This part belongs to the 18QHTF21 series of surface-mount crystal oscillators from Mercury Electronics. The series typically offers various standard frequencies with consistent 4-SMD no-lead packaging. These components are designed for compact electronic designs where space efficiency and reliable clock generation are prioritized over high-frequency performance.

Replacement Considerations

Direct substitutes include other 8.784 MHz LVCMOS oscillators with identical 1.8V supply and 4-SMD no-lead footprints. Compatible alternatives must match the ±50 ppm stability and -40°C to +85°C operating range. Verify pinout compatibility and electrical characteristics before substitution.