18QHTF21-49.430-PD

Overview

The Mercury Electronics 18QHTF21-49.430-PD is a 49.43 MHz standard crystal oscillator (XO) utilizing LVCMOS output logic. It operates at a supply voltage of 1.8V and features a compact 4-SMD, no-lead package. The device includes a standby power-down function for energy management. It supports an output enable (OE) pin for signal control. This component is designed for precision timing applications requiring low power consumption and small form factor integration in electronic circuits.

Feature Summary

• LVCMOS output interface for digital logic compatibility
• Integrated standby power-down mode to reduce current consumption
• Compact 4-SMD no-lead surface mount package design
• Output enable functionality for signal gating control

Applications

• General purpose clock generation in consumer electronics
• Timing reference for microcontrollers and processors
• Communication module synchronization circuits
• Portable devices requiring low-power oscillators

Procurement Notes

Verify the specific suffix 'PD' indicates the power-down feature and 'OE' denotes output enable capability as per manufacturer documentation. Confirm that the 1.8V operating voltage aligns with your system's power rail requirements. Ensure the 4-SMD no-lead footprint matches your PCB layout constraints. Cross-reference the exact frequency tolerance and stability specifications from the official datasheet before finalizing procurement orders.

Selection Notes

Select this component when a low-voltage 1.8V LVCMOS oscillator is required. The choice is appropriate for space-constrained designs due to its small SMD package. Consider the power-down feature if battery life or thermal management is critical. Verify that the load capacitance and drive level requirements of the target circuit are compatible with the oscillator's internal parameters.

Part Context

This part belongs to the 18QHTF21 series of quartz crystal oscillators manufactured by Mercury Electronics Ind. Co. Ltd. The series offers various frequencies and package options. Unlike through-hole crystals, this surface-mount device provides integrated oscillator functionality. It is distinct from temperature-compensated (TCXO) or voltage-controlled (VCXO) variants within the same product family.

Replacement Considerations

Direct substitutes must match the 49.43 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD no-lead package. Check equivalent parts from other manufacturers for identical pinout and electrical characteristics. Ensure replacement components support the same standby and output enable functions.