CH9434 Datasheet | Unknown Manufacturer

Overview CH9434 is a SPI to 4-UART transfer chip, which provides four full duplex nine-line UARTs, and is used to extend UART for MCU/embedded system. CH9434 includes four UARTs patible with 16C550 and supports up to 4Mbps baud rate munication. It supports up to 25-channel GPIO and provides half-duplex transceiver automatic switch pin TNOW. SCS# SCK SDI SDO INT# RXD0/TXD0/CTS0/RTS0 DTR0/DSR0/DCD0/RI0/TNOW0 RXD1/TXD1/CTS1/RTS1 DTR1/DSR1/DCD1/RI1/TNOW1 RXD2/TXD2/CTS2/RTS2 DTR2/DSR2/DCD2/RI2/TNOW2 RXD3/TXD3/CTS3/RTS3 DTR3/DSR3/DCD3/RI3/TNOW3 UART0 UART1 UART2 UART3 2. Features - Operating voltage: 3.3V - Support munication baud rate setting, with the baud rate range of 1200-4000000bps. - UART has an independent FIFO buffer in each direction, sending 1536 bytes and receiving 2048 bytes. - Four fully independent UARTs, patible with 16C550 and enhanced. - Support 5/6/7/8 data bits and 1/2 stop bits. - UARTs support odd, even, no parity, blank 0, mark 1 and other verification methods. - Support the monly used MODEM munication signals RTS, DTR, DCD, RI, DSR and CTS. - Provide half-duplex RS485 receive/transmit enable pin. - The maximum rate of SPI is 16Mbit/s. - Support low power sleep mode, which can be awakened via SPI interface. - Built-in clock, which can be provided by the optional external crystal oscillator. - Provide configurable GPIO functions. - Provide QFN48_5X5 lead-free package, patible with Ro HS. 3. Applications - MCU/DSP/embedded system. - Industrial automation RS-485 munication. - Serial server, card with multi serial ports. - municate with Bluetooth, 4G, Wi Fi and other serial modules to realize wireless transmission. CH9434 Datasheet 4. Package http://wch.cn Package QFN48_5X5 Width of Plastic 5- 5mm Pitch of Pin 0.35mm 13.8mil Instruction of Package Square leadless 48-pin Ordering Information CH9434M 5....