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tca6416artwr
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Texas Instruments I/O Expanders, WQFN-24-EP(4x4). Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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markdownTCA6416ARTWR
Texas Instruments · I/O Expanders · WQFN-24-EP(4x4)
TCA6416ARTWR from Texas Instruments, in a WQFN-24-EP(4x4). Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 22 | INT | output | Active-low interrupt output. Open-drain; connect to VCCI or VCCP through a pull-up resistor. Asserted when a P-port input changes state. |
| 23 | VCCI | power_in | Supply voltage for the I2C-bus side (1.65 V to 5.5 V). Connect directly to the supply voltage of the external I2C controller. |
| 24 | RESET | input | Active-low reset input. Connect to VCCI or VCCP through a pull-up resistor if no active connection is used. Resets registers to default power-on values. |
| 1 | P00 | bidirectional | P-port 0 bit 0. Push-pull I/O structure. Configured as an input at power-on. Referenced to VCCP (1.65 V to 5.5 V). |
| 2 | P01 | bidirectional | P-port 0 bit 1. Push-pull I/O structure. Configured as an input at power-on. |
| 3 | P02 | bidirectional | P-port 0 bit 2. Push-pull I/O structure. Configured as an input at power-on. |
| 4 | P03 | bidirectional | P-port 0 bit 3. Push-pull I/O structure. Configured as an input at power-on. |
| 5 | P04 | bidirectional | P-port 0 bit 4. Push-pull I/O structure. Configured as an input at power-on. |
| 6 | P05 | bidirectional | P-port 0 bit 5. Push-pull I/O structure. Configured as an input at power-on. |
| 7 | P06 | bidirectional | P-port 0 bit 6. Push-pull I/O structure. Configured as an input at power-on. |
| 8 | P07 | bidirectional | P-port 0 bit 7. Push-pull I/O structure. Configured as an input at power-on. |
| 9 | GND | power_in | Ground reference for the device (both VCCI and VCCP domains). |
| 10 | P10 | bidirectional | P-port 1 bit 0. Push-pull I/O structure. Configured as an input at power-on. |
| 11 | P11 | bidirectional | P-port 1 bit 1. Push-pull I/O structure. Configured as an input at power-on. |
| 12 | P12 | bidirectional | P-port 1 bit 2. Push-pull I/O structure. Configured as an input at power-on. |
| 13 | P13 | bidirectional | P-port 1 bit 3. Push-pull I/O structure. Configured as an input at power-on. |
| 14 | P14 | bidirectional | P-port 1 bit 4. Push-pull I/O structure. Configured as an input at power-on. |
| 15 | P15 | bidirectional | P-port 1 bit 5. Push-pull I/O structure. Configured as an input at power-on. |
| 16 | P16 | bidirectional | P-port 1 bit 6. Push-pull I/O structure. Configured as an input at power-on. |
| 17 | P17 | bidirectional | P-port 1 bit 7. Push-pull I/O structure. Configured as an input at power-on. |
| 18 | ADDR | input | I2C slave-address select input. Connect directly to VCCP or GND to select one of two addresses, allowing two TCA6416A devices on the same bus. |
| 19 | SCL | input | I2C/SMBus serial clock input. Connect to VCCI through a pull-up resistor. Supports 100 kHz standard mode and 400 kHz fast mode. |
| 20 | SDA | bidirectional | I2C/SMBus serial data line. Open-drain; connect to VCCI through a pull-up resistor. |
| 21 | VCCP | power_in | Supply voltage for the P-port I/O side of the TCA6416A (1.65 V to 5.5 V). Independent from VCCI to allow voltage-level translation. |
| 25 | Thermal Pad | passive | Exposed thermal/die pad on the underside of the WQFN package. Connect to GND for best thermal performance. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | WQFN-24-EP(4x4) |
| Category | Comm/UART |
| Pins | 25 |
Ordering variants
TCA6416ARTWRTCA6416ARTWRRTWTTCA6416ARTWRPWRTCA6416ARTWRPWTCA6416ARTWRZQSR
CAD (KiCad official)
- Symbol:
TCA6416ARTWR - Footprint:
Package_DFN_QFN:QFN-24-1EP_4x4mm_P0.5mm_EP2.7x2.7mm - 3D model: WQFN-24-EP(4x4) (KiCad packages3D, STEP)
3D model downloads
Two STEP files. Same geometry, different body top:
| File | Size | Use it when |
|---|---|---|
tca6416artwr.step |
277 KB | You want the bare part, or you mark your own boards. |
tca6416artwr-etched.step |
2.2 MB | You want the part with TCA6416ARTWR already on it. |
The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 581 faces against 158 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (45 pp, sha256
6bdaf310c12185a8, retrieved 2026-08-17, tier: lcsc) - Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- Extractor:
ds2sf(Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate. - CAD: KiCad official libraries (CC-BY-SA 4.0).