18QHTF21-123.000-PD

Overview

The 18QHTF21-123.000-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 123 MHz and utilizes LVCMOS output logic. The device requires a 1.8V supply voltage and features a power-down mode for standby applications. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0 x 1.6 mm. This component is designed for timing applications requiring precise frequency control in portable electronics.

Feature Summary

• Supports low voltage operation at 1.8V for energy efficiency
• Includes power-down functionality to reduce current consumption during standby
• Utilizes LVCMOS output logic for digital interface compatibility
• Features a small surface-mount package suitable for space-constrained designs

Applications

• Battery-powered portable devices
• Digital communication systems
• Consumer electronics requiring precise clock signals

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 footprint matches the 4-SMD No Lead package dimensions provided in the official datasheet to avoid assembly issues.

Selection Notes

Select this oscillator when a 123 MHz clock signal is required with low power consumption constraints. The LVCMOS output is suitable for standard digital logic families. Consider the 1.8V supply requirement and ensure compatibility with the system's voltage levels. The compact size makes it ideal for dense PCB layouts where space is limited.

Part Context

This part belongs to the 18QHTF21 series of crystal oscillators from Mercury Electronics. The series offers various frequencies and voltage options, all sharing similar packaging and functional characteristics. The 'PD' suffix indicates the inclusion of a power-down feature, distinguishing it from standard continuous-operation variants within the same family.

Replacement Considerations

Direct substitutes include other 123 MHz LVCMOS oscillators in 4-SMD packages with 1.8V supply and power-down capabilities. Verify pinout compatibility and electrical specifications such as jitter and phase noise before substitution.