18QHTF21-1.8432-PD

Overview

The 18QHTF21-1.8432-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a fixed frequency of 1.8432 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a standby power-down mode to reduce consumption. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0x1.6mm.

Feature Summary

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

Applications

• Battery-powered portable devices
• Compact electronic systems requiring low profile components
• Digital circuits utilizing LVCMOS interfaces

Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the official datasheet before integration. Confirm that the 1.8V supply rail is stable within the specified operating range. Ensure the PCB layout accommodates the 2.0x1.6mm footprint and no-lead package type for proper soldering and thermal performance.

Selection Notes

Select this component when a precise 1.8432 MHz clock source is required for low-power applications. The choice is driven by the need for a small 2.0x1.6mm form factor and compatibility with 1.8V logic levels. Consider the power-down feature if energy efficiency during idle states is a critical design constraint.

Part Context

This model belongs to the 18QHTF21 series of surface-mount oscillators from Mercury Electronics. The series offers various frequencies in a standardized small outline package. The -PD suffix indicates the inclusion of a power-down control pin, distinguishing it from continuous-operation variants within the same physical footprint family.

Replacement Considerations

Direct substitutes must match the 1.8432 MHz frequency, 1.8V supply, LVCMOS output, and 2.0x1.6mm package. Verify pinout compatibility, specifically the power-down control function, to ensure seamless replacement without circuit modification.