Shanghai Chipanalog Microelectronics Co., Ltd. CA.
CA-IF4820 - 3.0V to 5.5V RS485/RS422 Transceiver
Shanghai Chipanalog Microelectronics Co., Ltd. CA-IF4805/CA-IF4820/CA-IF4850 Version 1.01, 2022/12/21 3.0V to 5.5V RS485/RS422 Transceivers with ±30.