ElectronicsThe CH438L with LQFP-128 RS232 ICs ROHS is a communications controller chip manufactured by Qin Heng Electronics. It is equipped with 8-bit single-chip microcontroller, full-duplex serial communication interface, 128KB Flash ROM, 512 KB SRAM, and supports 10 BASET/100 BASE-TX. It includes two integrated RS232 level converters for serial communication interface, a connection for RS232/RS485 transceiver, plus a power management and reset circuit. It also includes a watchdog timer, interrupts, timer, real-time clock, analog-to-digital converter, and SPI controller. The integrated ROHS (Restriction Of Hazardous Substances) compliance ensures safe operation at the lowest power consumption. This chip is highly optimized for embedded and IoT applications, as well as POS systems, meter reading, and medical equipment.