18QHTF21-123.750-PD

Overview

The 18QHTF21-123.750-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 123.75 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a standby or power-down function to manage energy consumption efficiently. It is housed in a compact 4-SMD, No Lead package, suitable for surface-mount applications requiring precise timing signals.

Feature Summary

• Supports low-voltage operation with integrated power-down capability
• Provides stable LVCMOS signal output for digital circuits
• Utilizes a leadless surface-mount package for space-constrained designs

Applications

• Digital signal processing systems requiring precise clock synchronization
• Communication equipment utilizing high-frequency data transmission
• Consumer electronics with strict power management requirements

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before ordering. Confirm that the 1.8V supply rail is stable and within the operational limits specified in the official datasheet. Ensure the PCB footprint matches the 4-SMD No Lead package dimensions to prevent assembly issues during manufacturing.

Selection Notes

Select this component when a fixed 123.75 MHz frequency is required for system timing. Consider the LVCMOS interface compatibility with downstream logic gates. Evaluate the power-down feature necessity for battery-operated devices. Compare package size constraints against alternative oscillator families from the same manufacturer to ensure optimal board layout efficiency.

Part Context

This model belongs to the 18QHTF21 series of crystal oscillators from Mercury Electronics. The series typically offers various frequencies and voltage levels. The suffix PD indicates the inclusion of a power-down control pin. This specific part number denotes the 123.75 MHz variant within the standardized product line.

Replacement Considerations

Direct substitutes must match the 123.75 MHz frequency, 1.8V supply, and LVCMOS output. Verify package compatibility for the 4-SMD No Lead form factor. Check if the replacement supports the same standby functionality. Consult the manufacturer's cross-reference list for verified equivalent part numbers.