18QHTF21-50.0533-PD

Overview

The 18QHTF21-50.0533-PD is a quartz crystal oscillator manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a nominal frequency of 50.0533 MHz with an LVCMOS output logic level. The device functions on a 1.8V supply voltage and includes a standby (power down) control feature for energy management. It is housed in a compact 4-SMD, No Lead package, suitable for surface-mount applications requiring precise timing signals.

Feature Summary

• Generates stable clock signals using quartz crystal technology
• Supports low-voltage operation at 1.8V
• Features LVCMOS output interface for digital compatibility
• Includes power-down capability to reduce consumption

Applications

• General-purpose clock generation in embedded systems
• Timing reference for microprocessors and FPGAs
• Communication equipment requiring precise frequency standards
• Consumer electronics with space-constrained designs

Procurement Notes

Verify the exact frequency tolerance and load capacitance requirements against your system design specifications before procurement. Ensure that the 1.8V supply rail meets the current demands during active operation. Confirm that the PCB layout supports the 4-SMD no-lead package dimensions to avoid mechanical interference. Check if the standby pin functionality aligns with your power management strategy.

Selection Notes

Select this component when a specific 50.0533 MHz frequency is required with LVCMOS outputs. Consider the 1.8V operating voltage constraint and the need for power-down functionality. Evaluate the 4-SMD package size against available board space. Compare performance characteristics such as phase noise and stability if available in official documentation against alternative oscillators.

Part Context

This part belongs to the standard XO series from Mercury Electronics, designed for general timing applications. The '18' prefix likely indicates the 1.8V supply voltage, while 'QHTF21' denotes the package type and series. The '-PD' suffix confirms the inclusion of a power-down feature. This model is part of a broader lineup offering various frequencies within the same form factor.

Replacement Considerations

Direct replacements must match the 50.0533 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD no-lead package. Verify that any substitute also supports the standby function. Cross-reference with other Mercury Electronics models like 18QHTF21-50.000-PD only if frequency flexibility exists in the design.