18QHTF21-74.0193-PD

Overview

The 18QHTF21-74.0193-PD is a fixed-frequency crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 74.0193 MHz with an LVCMOS output logic level. The device requires a supply voltage of 1.8V and features a power-down (standby) function for energy management. It is housed in a compact 4-SMD, no-lead package with dimensions of 2.0mm x 1.6mm.

Feature Summary

• Supports LVCMOS output logic for standard digital interfacing
• Includes standby mode capability to reduce power consumption
• Utilizes a small form-factor surface-mount package

Applications

• General clock signal generation in electronic circuits
• Data communication systems requiring precise timing
• Embedded systems utilizing low-voltage logic interfaces

Procurement Notes

Verify the specific frequency tolerance and operating temperature range against the official datasheet before integration. Confirm that the 1.8V supply requirement aligns with the target system's power architecture. Ensure the 4-SMD package footprint matches the PCB design constraints.

Selection Notes

Select this component when a stable 74.0193 MHz reference is required in space-constrained designs. The 1.8V operation makes it suitable for modern low-power applications. Consider the power-down feature if system-level energy efficiency is a priority during idle states.

Part Context

This part belongs to the QHTF series of crystal oscillators from Mercury Electronics. The series typically offers various frequencies and package options. The 'PD' suffix indicates the inclusion of a power-down control pin or functionality within the device.

Replacement Considerations

Direct substitutes must match the 74.0193 MHz frequency, 1.8V supply, LVCMOS output, and 2.0x1.6mm package. Verify compatibility with any power-down control signals used in the original design.