HDMI TYPE A · 19 CONTACTS
HDMI port pinout
One connector. Nineteen pins. Explore the signals behind your picture, sound, and device connection.
This HDMI Type A pinout explains each contact on the standard full-size connector used by many consoles, TVs, monitors, and laptops. Trace the signal groups in the interactive explorer or jump to the complete pin table.
Before you trace a pin: check the viewing direction
The explorer shows functional signal paths, not physical pin positions. A plug mating face, socket mating face, and rear solder-pad view can appear mirrored. Identify pin 1 using the exact connector manufacturer's drawing before tracing a board. Do not use the artwork above as an orientation guide. Mini HDMI (Type C) and Micro HDMI (Type D) also have 19 contacts, but their pin assignments differ.
Interactive HDMI 19-pin signal explorer
Select a pin to highlight its typical circuit path. Search by pin number or signal, filter by group, or expand the diagram. On smaller screens, swipe the diagram horizontally.
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HDMI Type A pinout table: all 19 pins
These are connector contact numbers, not IC package pin numbers. The names below describe the conventional TMDS signal assignment; supported FRL modes reuse the high-speed pairs.
| Pin | Signal | Function |
|---|---|---|
| 1 | TMDS Data2+ | Positive conductor of the Data2 differential pair in the high-speed HDMI path. |
| 2 | TMDS Data2 Shield | Shield / ground return for the Data2 pair. This is not a data input on the HDMI IC. |
| 3 | TMDS Data2− | Negative conductor of the Data2 differential pair in the high-speed HDMI path. |
| 4 | TMDS Data1+ | Positive conductor of the Data1 differential pair in the high-speed HDMI path. |
| 5 | TMDS Data1 Shield | Shield / ground return for the Data1 pair. Actual shield bonding follows the board design. |
| 6 | TMDS Data1− | Negative conductor of the Data1 differential pair in the high-speed HDMI path. |
| 7 | TMDS Data0+ | Positive conductor of the Data0 differential pair in the high-speed HDMI path. |
| 8 | TMDS Data0 Shield | Shield / ground return for the Data0 pair. This path belongs to the ground / shield network. |
| 9 | TMDS Data0− | Negative conductor of the Data0 differential pair in the high-speed HDMI path. |
| 10 | TMDS Clock+ | Positive TMDS clock conductor. In four-lane FRL operation, the clock pair is reused as a data lane. |
| 11 | TMDS Clock Shield | Shield / ground return associated with the TMDS clock differential pair. |
| 12 | TMDS Clock− | Negative TMDS clock conductor. In four-lane FRL operation, the clock pair is reused as a data lane. |
| 13 | CEC | Single-wire Consumer Electronics Control bus for device-control communication. |
| 14 | Utility / HEAC+ | Optional auxiliary / HEAC path. Implementation varies; do not assume this pin is populated on every board. |
| 15 | DDC SCL | DDC I²C clock used for display information (EDID) and HDCP communication. |
| 16 | DDC SDA | DDC I²C data used for display information (EDID) and HDCP communication. |
| 17 | DDC/CEC Ground | Ground reference for the DDC and CEC control signals. Not a separate signal-processing IC. |
| 18 | +5V Power | HDMI source power path, typically through a supply / protection circuit rather than a high-speed IC output. |
| 19 | HPD / HEAC− | Hot Plug Detect from the display toward the source. HEAC− shares this pin in supported implementations. |
What do the HDMI signal groups do?
High-speed pairs: pins 1–12
TMDS carries video, audio, and related packets across three differential data pairs plus a clock pair. In supported four-lane FRL modes, the clock pair becomes another data lane. Each pair has an associated shield contact.
CEC: pin 13
Consumer Electronics Control is a shared, single-wire control bus. It enables compatible devices to exchange commands such as power and input selection; it is not a video signal.
DDC: pins 15–17
SCL and SDA form the Display Data Channel, with pin 17 providing the control-signal ground reference. The source uses DDC to read the display's EDID capabilities and exchange HDCP information.
Power and detection: pins 18–19
Pin 18 supplies +5 V from the source. Pin 19 carries Hot Plug Detect from the display to the source. Detection and display-information exchange help establish a connection before normal video transmission.
Utility / HEAC: pins 14 and 19
Pin 14 is the utility / HEAC+ contact; pin 19 shares HPD with HEAC− in supported designs. Auxiliary functionality depends on the implementation, so a generic diagram does not establish whether a board supports it.
Ground and shielding
Pins 2, 5, 8, and 11 are pair shields; pin 17 is the DDC/CEC ground reference. The connector's metal shell is separate from the 19 signal contacts. Exact bonding and protection follow the board design.
Using the pinout to understand HDMI faults
A bent contact, cracked solder joint, damaged pad, or failed protection component can interrupt a connection. But a “no signal” message alone cannot identify the failed pin or prove the port needs replacing.
First try a known-good HDMI cable and a different display input. Inspect an unpowered connector for visible damage. Board-level measurements require the correct connector drawing and board documentation; never bridge adjacent contacts or assume a resistance value from this generic guide.
HDMI pinout questions
How many pins does a standard HDMI port have?
The full-size HDMI Type A connector has 19 signal contacts. The metal shell is not counted as a twentieth signal pin.
Which HDMI pin supplies power?
On Type A, pin 18 is the +5 V source supply. Pin 19 is Hot Plug Detect, not a second power-supply pin.
Do HDMI 2.0 and HDMI 2.1 use different Type A pinouts?
The Type A connector retains its 19 contacts. The high-speed signaling mode can change: TMDS uses three data pairs and a clock pair, while four-lane FRL reuses the clock pair as data. Connector appearance alone does not establish bandwidth support.
Can I use this diagram for PS5 or Xbox solder pads?
It explains Type A contact functions, not a console motherboard layout. Identify the exact replacement connector and board revision, then use their documentation to establish pad orientation and routing.
Technical references
Signal assignments: Wilder Technologies Type A HEAC test-adapter manual. TMDS/FRL channel use: AMD HDMI PHY Controller documentation. Protection and control circuits: Texas Instruments TPD12S016 datasheet.
Generic educational reference. Exact ICs, protection components, and routing depend on the board. HDMI is a trademark of HDMI Licensing Administrator, Inc.; this guide is not an official HDMI specification.