Low Cost, Reliable, Easy to solder, No crystal needed, Few components needed. Creates virtual COM port on PC over USB Port. Works in all version of Windows, Linux and Mac. 3V to 5V operation. Can replace CP2102 and FTDI chips where only RX/TX is used.
The MA112 is a USB to UART Data Bridge controller. It includes a USB 2.0 full-speed function controller, USB transceiver and 5V to 3.3V regulator. The UART function only supports the TXD and RXD on RS-232 connection. Better than CH340. Operates without crystal.