I need a quad UART chip with only RXD and TXD per channel, no handshake required, preferable communicating with my CPU through an SPI port. Baudrates in the range of 4800 to 38400 baud. Oh, and it needs to be cheap.
I am thinking about a small controller but most only have two UARTS and doing four in software at 38400 seems quite a challenge to me. So maybe s small FPGA/CPLD solution would be in order. But most of all, it needs to be simple, cheap and small footprint.
All suggestions are welcome.