製造中止製品(EOL)
                                                
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                            ・All signals are inverted
・64-character FIFOs on all receivers and transmitters
・Eight TTL-level ports
・Support for RXD, TXD, RTS, CTS, and GND on each port
                        
                    ・64-character FIFOs on all receivers and transmitters
・Eight TTL-level ports
・Support for RXD, TXD, RTS, CTS, and GND on each port

