SATA Data Connector (7-Pin)
7-pin rectangular connector
Standards: Serial ATA Revision 1.0, Serial ATA Revision 2.0, Serial ATA Revision 3.0, Serial ATA Revision 3.2
What is the SATA Data pinout?
The SATA Data Connector (7-Pin) has 7 pins. Pin 1 is GND (ground). Pin 2 is A+ (data). Pin 3 is A- (data). Pin 4 is GND (ground). Plus 3 more pins.
Standards: Serial ATA Revision 1.0, Serial ATA Revision 2.0, Serial ATA Revision 3.0, Serial ATA Revision 3.2
Pin Assignment Table
| Pin | Signal | Type | Description |
|---|---|---|---|
| 1 | GND | ground | Ground (1st Ground) |
| 2 | A+ | data | Transmit+ (Host to Device, Differential Pair A) |
| 3 | A- | data | Transmit- (Host to Device, Differential Pair A) |
| 4 | GND | ground | Ground (2nd Ground - Pair Isolation) |
| 5 | B- | data | Receive- (Device to Host, Differential Pair B) |
| 6 | B+ | data | Receive+ (Device to Host, Differential Pair B) |
| 7 | GND | ground | Ground (3rd Ground) |
Signal Types
Common Applications
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Use the pinout as a working reference now, then jump to the full library or the next workflow when you need it.
Map this connector into your BOM workflow →The SATA Data connector has 7 pins: Pin 1 (GND), Pin 2 (A+), Pin 3 (A-), and Pin 4 (GND). Plus 3 more pins. Common in Internal hard drives (HDD) and Solid-state drives (SSD).
SATA Data Connector Pinout Guide
SATA (Serial ATA) replaced the parallel ATA (PATA/IDE) interface for storage devices, offering faster speeds, thinner cables, and hot-plug capability. The 7-pin data connector uses two differential signal pairs: A+/A- for transmitting data from host to device, and B+/B- for receiving data from device to host. The three ground pins (1, 4, 7) provide signal isolation between the differential pairs and ensure reliable high-speed communication. SATA III (6 Gbps) is the current standard, providing up to 600 MB/s theoretical throughput - sufficient for most SSDs and all mechanical hard drives.
Wiring Tips & Best Practices
SATA data cables should be kept under 1 meter (39 inches) in length to maintain signal integrity at high speeds. The L-shaped connector key must align with the socket key for proper insertion - do not force connections. For SATA III performance, use certified SATA III cables with proper shielding. When routing cables in a case, avoid sharp bends that could damage the thin wires. SATA cables can be safely split with Y-adapters for the power connector, but NEVER split the data connector - each drive needs its own dedicated data cable to a SATA port. For hot-plug capability, enable AHCI mode in BIOS (not IDE compatibility mode).
Common Issues
Drive not detected: Check both data and power connections; try a different SATA port and cable. SATA cables can develop intermittent faults from repeated flexing - replace suspect cables when troubleshooting. Performance slower than expected: Verify AHCI mode is enabled in BIOS (IDE mode limits performance). Ensure the cable and port both support SATA III for 6 Gbps drives. The connector latch can break from aggressive removal - always grip the plug, not the cable. Bent pins in the drive socket usually require professional repair or drive replacement. For RAID arrays, use cables of identical length to minimize timing differences. eSATA (external SATA) uses the same pinout but different connector for external drives - do not confuse with internal SATA.
Why Use Interactive Diagrams?
- Accuracy: Hover over pins to see exact signal names and descriptions
- Clarity: Color-coded by signal type (power, ground, data)
- Printable: Export clean diagrams for shop floor reference