18QHTF21-75.500-PD

Overview

The 18QHTF21-75.500-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a fixed frequency of 75.5 MHz and utilizes LVCMOS output logic. The device supports a supply voltage of 1.8V and includes a standby or power-down function for energy management. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm. This component is designed for applications requiring precise clock signals within a small form factor.

Feature Summary

• Standard crystal oscillator configuration with LVCMOS output interface
• Integrated standby and power-down functionality for power efficiency
• Compact 4-SMD no-lead surface mount package design

Applications

• Digital signal processing clock sources
• Communication equipment timing references
• Embedded system microcontroller clocks

Procurement Notes

Verify the specific ordering suffix to ensure compatibility with required voltage levels and frequency tolerances. Confirm that the 1.8V supply requirement aligns with the target circuit design. Check for RoHS compliance status if environmental regulations apply. Ensure the 4-SMD package footprint matches the PCB layout constraints. Validate the operating temperature range against the intended application environment before finalizing procurement.

Selection Notes

Select this component when a low-profile 2.0x1.6mm oscillator is required for 75.5 MHz applications. Consider the 1.8V supply constraint and LVCMOS output compatibility with downstream logic. Evaluate the need for power-down features versus continuous operation requirements. Compare package dimensions against available board space. Verify frequency stability needs against standard XO specifications rather than TCXO performance.

Part Context

This part belongs to the 18QHTF21 series of surface-mount oscillators from Mercury Electronic. The series offers various frequencies and voltages in a standardized small outline package. The 'PD' suffix typically indicates the inclusion of power-down control capabilities. Mercury Electronic manufactures these components as part of their broader portfolio of quartz crystals and frequency control products established since 1973.

Replacement Considerations

Direct substitutes include other 75.5 MHz LVCMOS oscillators in 2.0x1.6mm packages with 1.8V operation. Verify pinout compatibility and electrical characteristics such as rise/fall times and load current. Alternative parts may require verification of phase noise and jitter specifications if critical for the application.