DAN-190 Datasheet, PDF (5/6 Pages) Exar Corporation – EXAR UARTS IN RS-485 APPLICATIONS

DAN190
EXAR UARTS IN RS-485 APPLICATIONS
5.0 EXAR'S UART AND HALF-DUPLEX RS-485 TRANSCEIVERS SOLUTION
The UARTs in the table on the previous page can be used with Exar’s half-duplex RS-485 transceivers for a
complete half-duplex RS-485 solution. The table below lists Exar’s half-duplex RS-485 transceivers.
TABLE 2: HALF-DUPLEX RS-485 TRANSCEIVERS
RS-485 TRANSCEIVER PRODUCT NUMBER
SP3072E
SP3075E
SP3078E
SP3494
SP1481E
SP1485E
SP3082E
SP3085E
SP3088E
SP3481
SP3483
SP3485
SP4082E
SP481E
SP483
SP485
SP485E
SP485R
SP495
5.1 Exar’s UART and Full-duplex RS-485 Transceivers
Any Exar UART can be used with any full-duplex RS-485 (or RS-422 or RS-232) transceiver because the
UART transmitter and receiver are independent of each other. In other words, the UART can simultaneously
transmit and receive at the same time.
6.0 CONCLUSION
Exar’s enhanced UARTS with the patented Automatic RS-485 Half-Duplex Direction control feature can
simplify both the hardware design and software development of half-duplex RS-485 applications. Exar offers
many enhanced UARTs with different CPU interfaces, FIFO sizes, channels and operating voltages. In
addition, Exar offers a complete portfolio of robust half-duplex RS-485 transceivers. Combining Exar’s
enhanced UARTs with Exar’s RS-485 transceivers forms a complete RS-485 application solution.
5