18QHTF21-4.500-PD

Oscillators Overview

The 18QHTF21-4.500-PD is a standard crystal oscillator manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 4.5 MHz and utilizes LVCMOS output logic levels. The device is designed for a supply voltage of 1.8V and features a power-down mode accessible via a standby control pin. It is housed in a compact 4-SMD, no-lead package with dimensions of 2.0mm x 1.6mm.

Oscillators Feature Summary

• Supports low-voltage operation at 1.8V
• Includes standby functionality for power management
• Provides LVCMOS signal output compatibility

Oscillators Applications

• General-purpose clock signal generation
• Embedded system timing references
• Consumer electronics circuit boards

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your design specifications before ordering. Confirm that the 1.8V supply voltage aligns with your system's power rails. Ensure the 4-SMD footprint matches your PCB layout constraints. Check for any specific manufacturing date codes or lot traceability requirements if applicable to your quality standards.

Oscillators Selection Notes

Select this component when a precise 4.5 MHz reference is required in space-constrained designs. Consider the 1.8V operating voltage as a primary constraint for compatible logic families. Evaluate the need for active power-down capabilities to meet energy efficiency targets. Compare package dimensions against available board real estate to ensure mechanical fit.

Oscillators Part Context

This part belongs to the 18QHTF21 series of surface-mount oscillators from Mercury Electronics. The series typically offers various frequency options within a standardized 2.0x1.6mm form factor. These components are engineered for applications requiring stable clock signals in portable and industrial devices where size and power consumption are critical factors.

Oscillators Replacement Considerations

Direct substitutes must match the 4.5 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package. Verify pinout compatibility and electrical characteristics such as jitter and phase noise. Cross-reference with other manufacturers offering similar small-form-factor oscillators if availability is an issue.