The JSM1621B is a LCD driver in a SSOP-48 package manufactured by JSMSEMI. It has RoHS compliance, meaning it does not contain any hazardous substances. It is designed to interface with various type of LCD displays, such as TN, STN, FSTN, CSTN, and LCMs. It can support up to 16 colors and 128 gray levels. It can support up to 8/9/12/16-bit data and presents a wide operating voltage of 2.3V to 5.5V, making it suitable for a variety of applications. Additionally, it offers low power consumption and fast data transfer speed.