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20 pin SFF-8784 edge connector layout
20 pin SFF-8784 edge connector
SFF-8784 edge connector is intended to save space on slim SATA devices

Slim 2.5-inch SATA devices, 5 mm in height, use the twenty-pin SFF-8784 edge connector to save space. By combining the data signals and power lines into a slim connector that effectively enables direct connection to the device's printed circuit board (PCB) without additional space-consuming connectors, SFF-8784 allows further internal layout compaction for portable devices such as ultrabooks.

SFF-8784 connector pinout

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Pin Function Pin Function Pin Function Pin Function
1 Ground 6 Unused 11 Ground 16 +5 V
2 Ground 7 +5 V 12 B+ (transmit) 17 Ground
3 Ground 8 Unused 13 B− (transmit) 18 A− (receive)
4 Ground 9 Unused 14 Ground 19 A+ (receive)
5 LED 10 Ground 15 +5 V 20 Ground


According to 2 reports in our database (1 positive and 1 negative) the SATA SFF-8784 pinout may be incorrect.

Is this pinout
SATA SFF-8784 visual pinout:click to enlarge
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