049ST2-4.000F20DTJJK

Crystals Overview

The 049ST2-4.000F20DTJJK 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 load capacitance of 20 pF and an equivalent series resistance (ESR) of 200 Ohms. The component features a ±10 ppm frequency tolerance and utilizes the HC-49S package style, which is a standard two-dip configuration.

Crystals Feature Summary

• Utilizes HC-49S through-hole package for standard mounting
• Provides stable oscillation at 4.000 MHz with 20pF load capacitance
• Maintains high frequency stability with ±10 ppm tolerance

Crystals Applications

• Microcontroller clock circuits
• Communication interface timing
• General-purpose oscillator designs

Crystals Procurement Notes

Verify the exact suffix 'DTJJK' against official manufacturer documentation to confirm specific manufacturing lot or minor variant details, as distributor listings may occasionally contain typographical errors in ordering codes. Ensure compatibility with existing PCB footprint and reflow soldering profiles specified for the HC-49S package.

Crystals Selection Notes

Select this component when a precise 4 MHz reference is required with tight frequency stability. The 200 Ohm ESR suits applications requiring moderate drive levels. Confirm that the 20 pF load capacitance matches the oscillator circuit design requirements to ensure accurate frequency generation without additional external trimming.

Crystals Part Context

This part belongs to the 049ST2 series of quartz crystals produced by Suzhou Hangjing Elec&Tech Co., Ltd., a company specializing in quartz frequency control units founded in 2014. The series typically includes various frequencies within the HC-49S form factor, catering to standard digital electronics timing needs.

Crystals Replacement Considerations

Direct substitutes must match the 4.000 MHz frequency, 20 pF load capacitance, 200 Ohm ESR, and HC-49S package. Verify that alternative manufacturers offer comparable ±10 ppm tolerance to maintain system timing accuracy.