18QHTF21-75.000-PD

Overview

The 18QHTF21-75.000-PD is a 75 MHz crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a supply voltage of 1.8V and features an LVCMOS output signal. The device 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.

Feature Summary

• Supports low-voltage operation at 1.8V
• Integrates a power-down mode for standby capability
• Delivers standard LVCMOS output signals

Applications

• General-purpose clock generation in embedded systems
• Timing reference for digital logic circuits
• Communication interface synchronization modules

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your system design before ordering. Confirm that the 1.8V supply voltage aligns with your target platform's power rails. Ensure the 4-SMD no-lead package footprint matches your PCB layout constraints to guarantee proper soldering and mechanical stability during assembly.

Selection Notes

Select this component when a precise 75MHz timing source is required within space-constrained designs. The 1.8V operating voltage makes it suitable for modern low-power portable electronics. Consider the LVCMOS interface compatibility with your microcontroller or FPGA I/O standards to ensure direct connectivity without additional level shifting circuitry.

Part Context

This part belongs to the 18QHTF series of surface-mount oscillators from Mercury Electronics. The series offers various frequencies and voltages. The PD suffix indicates the inclusion of a power-down control pin, distinguishing it from standard continuous-operation variants within the same package family.

Replacement Considerations

Direct substitutes include other 75MHz LVCMOS oscillators in 2.0x1.6mm packages with 1.8V operation. Verify pinout compatibility, specifically the power-down control configuration, before swapping. Alternative models from different manufacturers may require schematic adjustments due to differing control logic levels.