View max3100 datasheet:

19-1259; Rev 0; 7/97 SPI/Microwire-Compatible UART in QSOP-16 _______________General Description ____________________________Features The MAX3100 universal asynchronous receiver transmit- 16-Pin QSOP Package (8-pin SO footprint): ter (UART) is the first UART specifically optimized for Smallest UART Available small microcontroller-based systems. Using an Full-Featured UART: SPI™/Microwire™ interface for communication with the host microcontroller (µC), the MAX3100 comes in a com- —IrDA SIR Timing Compatible pact 16-pin QSOP. The asynchronous I/O is suitable for —8-Word FIFO Minimizes Processor use in RS-232, RS-485, IR, and opto-isolated data links. Overhead at High Data Rates IR-link communication is easy with the MAX3100’s —Up to 230k Baud with a 3.6864MHz Crystal inf