The X49SD20MWD3SC is a 20MHz, DIP Crystal Resonator manufactured by Yangxing that features HC-49S_3P, ±20ppm, and RoHS-compliance. It comes in a small, dual in-line package (DIP) that can easily be soldered directly onto a circuit board, allowing for simpler signal processing. The X49SD20MWD3SC is commonly used in a variety of electronics, such as digital radios, clock circuits, and PLL electronics.