The SFF-8644 is compliant with the latest SAS 3.0 spec, and supports 12Gb/s data transfer protocol. It can support up to 4-ports (4 lanes) of SAS data.
The newer SFF-8644 HD SAS connector interface have essentially replaced the SFF-8643 interface and the older SFF-8088 external, SFF-8087 internal SAS interfaces
| Pin Number |
Pin Name |
Description |
|---|---|---|
| A1 | Rsv | Reserved |
| A2 | INTL | |
| A3 | GND (shield) | Lane 1 receive |
| A4 | Rx1+ | |
| A5 | Rx1- | |
| A6 | GND (shield) | Lane 3 receive |
| A7 | Rx3+ | |
| A8 | Rx3- | |
| A9 | GND | |
| B1 | Vact | |
| B2 | ModPrsl | shorted to Ground in cable |
| B3 | GND (shield) | Lane 0 receive |
| B4 | Rx0+ | |
| B5 | Rx0- | |
| B6 | GND (shield) | Lane 2 receive |
| B7 | Rx2+ | |
| B8 | Rx2- | |
| B9 | GND | |
| C1 | SCL | eeprom communication in cable |
| C2 | SDA | eeprom communication in cable |
| C3 | GND (shield) | Lane 1 transmit |
| C4 | Tx1+ | |
| C5 | Tx1- | |
| C6 | GND (shield) | Lane 3 transmit |
| C7 | Tx3+ | |
| C8 | Tx3- | |
| C9 | GND | |
| D1 | Vact | Sideband 5 |
| D2 | Vman | eeprom power in cable |
| D3 | GND | |
| D4 | Tx0+ | Lane 0 transmit |
| D5 | Tx0- | |
| D6 | GND (shield) | |
| D7 | Tx2+ | Lane 2 transmit |
| D8 | Tx2- | |
| D9 | GND (shield) |
correct
incorrect