Apple Macintosh Serial 9 pin

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Available on Macintosh Mac 512KE and earlier.

9 PIN D-SUB FEMALE 9 PIN D-SUB MALE at the mouse cable.

9 PIN D-SUB MALE 9 PIN D-SUB FEMALE at the computer.

Pin Name Dir Description
1 GND - Ground
2 +5V OUT +5 VDC. Don’t use this one, it may be converted into output handshake in later equipment.
3 GND - Ground
4 Tx+ OUT Transmit Data, positive going component
5 Tx- OUT Transmit Data, negative going component
6 +12V OUT +12 VDC
7 DSR/HSK IN Handshake input. Signal name depends on mode: Used for Flow Control or Clock In.
8 Rx+ IN Receive Data, positive going component
9 Rx- IN Receive Data, negative going component


  • Direction is Computer relative Equipment.


Category:Serial Connectors


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