049ST2-4.000F18DTLJK

Crystals Overview

The 049ST2-4.000F18DTLJK is a quartz crystal resonator manufactured by Suzhou Hangjing Elec&Tech Co., Ltd. It operates at a fundamental frequency of 4.000 MHz with a frequency tolerance of ±20 ppm. The component features a load capacitance of 18 pF and an equivalent series resistance (ESR) of 50 Ohms. It utilizes the HC-49/US package style, designed for through-hole mounting on printed circuit boards. The device is rated for an operating temperature range extending up to 85 °C, suitable for standard commercial electronic applications requiring stable clock signals.

Crystals Feature Summary

• Fundamental mode operation for precise frequency generation
• Through-hole mounting configuration for robust PCB integration
• Standardized HC-49/US package form factor

Crystals Applications

• Microcontroller clock circuits
• Communication interface timing
• General-purpose digital logic systems

Crystals Procurement Notes

Verify the specific manufacturing date code and lot traceability upon order confirmation. Ensure that the procurement documentation explicitly references the HC-49/US package dimensions and the 18 pF load capacitance specification to prevent compatibility issues with existing circuit designs. Confirm the ±20 ppm tolerance meets the system requirements before finalizing the purchase agreement.

Crystals Selection Notes

Select this component when a fundamental mode quartz resonator is required for 4 MHz applications. The 18 pF load capacitance must match the oscillator circuit design parameters to ensure accurate frequency output. Consider the 50 Ohm ESR value for drive level sensitivity and power consumption constraints within the target application environment.

Crystals Part Context

This part belongs to the 049ST2 series of quartz crystals from Suzhou Hangjing Elec&Tech. The series focuses on standard frequency control components utilizing the HC-49/US package. These units are designed for general electronic equipment, providing reliable frequency stability for digital systems requiring fundamental resonance modes.

Crystals Replacement Considerations

Compatible substitutes include other manufacturers' 4 MHz crystals in the HC-49/US package with 18 pF load capacitance and similar ESR values. Verify pin spacing and lead dimensions to ensure mechanical fit during replacement.