18QHTF21-43.7656-PD

Oscillators Overview

The 18QHTF21-43.7656-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a fixed frequency of 43.7656 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 2.0 x 1.6 mm. The component is RoHS compliant and designed for surface-mount applications requiring precise timing signals.

Oscillators Feature Summary

• Integrates LVCMOS output logic for standard digital interface compatibility
• Includes standby functionality to reduce power consumption during idle states
• Utilizes a small form-factor 4-SMD no-lead package for space-constrained designs

Oscillators Applications

• General-purpose clock signal generation in embedded systems
• Timing reference for microcontrollers and processors
• Data communication interfaces requiring stable frequency sources

Oscillators Procurement Notes

Verify the specific supply voltage requirement of 1.8V against the target circuit design before procurement. Confirm that the LVCMOS output level matches the input thresholds of the receiving logic. Ensure the PCB footprint accommodates the 2.0 x 1.6 mm SMD package dimensions. Check for RoHS compliance requirements if operating in regulated environments. Validate the part number suffix -PD indicates the correct packaging configuration.

Oscillators Selection Notes

Select this component when a low-profile, single-ended clock source is required for 43.7656 MHz applications. Consider the 1.8V supply constraint and ensure power budget allows for active operation. The standby feature makes it suitable for battery-powered devices where power efficiency is critical. Compare package size against available board real estate to ensure mechanical fit.

Oscillators Part Context

This oscillator belongs to the Mercury Electronics 18QHTF21 series, which features small SMD packages and LVCMOS outputs. The series offers various frequency options within a standardized physical footprint. The manufacturer has extensive experience in quartz crystal production, providing reliability for timing applications. This specific model represents a standard XO variant rather than a differential or spread-spectrum type.

Oscillators Replacement Considerations

Direct replacements must match the 43.7656 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD 2.0x1.6mm package. Verify pinout compatibility and electrical characteristics such as load current and rise/fall times. Cross-reference with other Mercury Electronics models in the same series for potential pin-compatible alternatives.