18QHTF21-74.963397-PD

Overview

The 18QHTF21-74.963397-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a nominal frequency of 74.963397 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a standby power-down function to reduce consumption when inactive. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm. This component is suitable for applications requiring precise timing signals in space-constrained electronic designs.

Feature Summary

• Supports low-voltage operation at 1.8V for energy efficiency
• Includes a standby mode with power-down capability
• Provides stable LVCMOS output signals
• Utilizes a small form-factor surface-mount package

Applications

• General-purpose digital timing circuits
• Embedded systems requiring precise clock sources
• Portable electronics with space constraints
• Communication modules needing standard frequency references

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Ensure that the 1.8V supply rail is stable and within the specified operating range to maintain signal integrity. Confirm that the PCB layout accommodates the 4-SMD no-lead package dimensions accurately to prevent soldering defects during assembly.

Selection Notes

Select this model when a fixed frequency of 74.963397 MHz is required with low power consumption capabilities. Consider the LVCMOS interface compatibility with downstream logic devices. Evaluate the thermal performance and operating temperature range to ensure reliability under expected environmental conditions. Compare package size against available board real estate to confirm fitment.

Part Context

This part belongs to the 18QHTF21 series from Mercury Electronics, which focuses on miniature oscillators. The series typically offers various frequencies and voltage options. The 'PD' suffix indicates the inclusion of a power-down feature. Mercury Electronics has established itself as a manufacturer of frequency control products since 1973, emphasizing precision and stability in their components.

Replacement Considerations

Direct substitutes must match the 74.963397 MHz frequency, 1.8V supply, LVCMOS output, and 2.0x1.6mm package. Verify pinout compatibility if replacing with similar packages from other manufacturers. Ensure equivalent electrical characteristics such as phase noise and jitter specifications are met for critical timing applications.