18QHTF21-4.433619-PD

Oscillators Overview

The 18QHTF21-4.433619-PD is a standard crystal oscillator (XO) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 4.433619 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features a Standby (Power Down) control function. It is housed in a compact 4-SMD, No Lead package, suitable for surface-mount applications requiring precise timing signals.

Oscillators Feature Summary

• Supports Low Voltage Complementary Metal-Oxide-Semiconductor (LVCMOS) output logic levels
• Includes standby functionality for power management via power down control
• Utilizes quartz-based resonator technology for stable frequency generation

Oscillators Applications

• General purpose clock signal generation in electronic circuits
• Timing reference sources for digital systems
• Embedded devices requiring low voltage operation

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against your circuit design before procurement. Ensure the 1.8V supply voltage aligns with your system's power rails. Confirm that the 4-SMD no-lead package dimensions fit within your PCB layout constraints. Cross-reference the manufacturer datasheet for detailed electrical characteristics and recommended soldering profiles to ensure reliable assembly and long-term performance stability.

Oscillators Selection Notes

Select this component when a precise 4.433619 MHz clock source is required with low voltage compatibility. Consider the LVCMOS interface for direct connection to compatible digital logic families. Evaluate the need for standby control if power efficiency is a priority. Compare package size against available board space. Ensure the operating temperature range meets environmental conditions. Verify that the output drive strength is sufficient for the connected load without additional buffering.

Oscillators Part Context

This part belongs to the 18QHTF21 series of surface-mount oscillators from Mercury Electronic. The series offers various frequencies with standardized LVCMOS outputs. The 'PD' suffix typically indicates a specific pinout or feature set related to the power down capability. These components are designed for high reliability in consumer and industrial electronics, providing stable timing solutions in a small form factor.

Oscillators Replacement Considerations

Direct replacements must match the 4.433619 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package. Check pin-to-pin compatibility and electrical specifications such as jitter and phase noise. Verify that any substitute also supports the standby function if required. Consult manufacturer cross-reference lists for validated alternatives.