18QHTF21-43.956-PD

Oscillators Overview

The 18QHTF21-43.956-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a nominal frequency of 43.956 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 during inactive periods. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm. This component is engineered for applications requiring precise timing signals within low-voltage digital systems.

Oscillators Feature Summary

• Supports LVCMOS output logic for direct interface with digital circuits
• Includes standby power-down functionality to minimize energy usage
• Utilizes a small form factor 4-SMD no lead package design

Oscillators Applications

• General purpose clock generation for embedded systems
• Timing reference for low-voltage digital processors
• Signal synchronization in consumer electronics devices

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Confirm that the 1.8V supply voltage aligns with your system's power rails. Ensure the PCB footprint matches the 4-SMD no lead package dimensions provided in the official datasheet. Check for any specific reflow soldering profile recommendations to maintain component integrity during assembly processes.

Oscillators Selection Notes

Select this oscillator when a 43.956 MHz clock signal is required for LVCMOS-compatible logic families. Consider the 1.8V operating voltage constraint for compatibility with modern low-power integrated circuits. Evaluate the need for power-down capabilities if energy efficiency is a critical design parameter. Compare the physical size constraints against available board space to ensure the 2.0x1.6mm package fits the layout requirements.

Oscillators Part Context

This component belongs to the 18QHTF21 series of surface-mount oscillators from Mercury Electronics. The series typically offers various standard frequencies optimized for common communication and computing protocols. The 'PD' suffix indicates the inclusion of a power-down control feature. These oscillators are part of Mercury's broader portfolio of quartz-based frequency control products established since 1973.

Oscillators Replacement Considerations

Direct substitutes may include other 43.956 MHz LVCMOS oscillators in 4-SMD packages with 1.8V operation. Verify pinout compatibility and electrical specifications such as phase noise and jitter before substitution. Alternative models from different manufacturers must match the physical dimensions and thermal characteristics to ensure proper fit and function.