18QHTF21-43.700-PD

Oscillators Overview

The 18QHTF21-43.700-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co., Ltd. It operates at a fixed frequency of 43.7 MHz and utilizes LVCMOS output logic levels. The device is designed for low-power applications, featuring a supply voltage of 1.8V and supporting a standby or power-down mode to reduce energy consumption during idle periods. It is housed in a compact 4-SMD, no lead package, suitable for surface-mount assembly on printed circuit boards. This component provides precise timing signals for digital systems requiring stable clock sources within the specified operating temperature range.

Oscillators Feature Summary

• Supports LVCMOS output logic for direct interface with digital circuits
• Includes standby capability for power reduction
• Utilizes a leadless surface-mount package design

Oscillators Applications

• General-purpose digital system clocking
• Embedded controller timing references
• Communication module synchronization

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Ensure the 1.8V supply rail is stable and within the absolute maximum ratings defined in the official datasheet. Confirm that the 4-SMD no-lead package dimensions align with your PCB footprint specifications to avoid assembly issues.

Oscillators Selection Notes

Select this model when a 43.7 MHz clock signal is required with LVCMOS compatibility. Consider the 1.8V supply constraint and the availability of a standby control line if power management is critical. Evaluate the thermal performance and operating temperature range to ensure reliability under your specific environmental conditions compared to alternative oscillators.

Oscillators Part Context

This part belongs to the 18QHTF21 series from Mercury Electronic Ind. Co., Ltd., a manufacturer specializing in quartz crystals and oscillators. The series typically offers various frequencies with standardized packaging. Mercury Electronics has established itself as a supplier of frequency control products, including TCXOs and VCTCXOs, providing timing solutions for electronic industries.

Oscillators Replacement Considerations

Direct substitutes include other 43.7 MHz LVCMOS oscillators in similar packages from compatible manufacturers. Verify pinout compatibility and electrical parameters such as rise/fall times and current consumption. Cross-reference with the 18QHTF21-43.001-PD or 18QHTF21-51.200-PD only if frequency adjustments are acceptable.