component
PCF8574ADWR
Public Made by Adomby adom
Texas Instruments I/O Expanders, SOIC-16-300mil. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownPCF8574ADWR
Texas Instruments · I/O Expanders · SOIC-16-300mil
PCF8574ADWR from Texas Instruments, in a SOIC-16-300mil. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | A0 | input | Address input 0; connect directly to VCC or GND without pullup resistors. |
| 2 | A1 | input | Address input 1; connect directly to VCC or GND without pullup resistors. |
| 3 | A2 | input | Address input 2; connect directly to VCC or GND without pullup resistors. |
| 4 | P0 | bidirectional | P-port quasi-bidirectional input/output 0; 25 mA sink at VO=1V, 310 μA source at VO=GND, push-pull design for LED drive. |
| 5 | P1 | bidirectional | P-port quasi-bidirectional input/output 1; 25 mA sink at VO=1V, 310 μA source at VO=GND, push-pull design for LED drive. |
| 6 | P2 | bidirectional | P-port quasi-bidirectional input/output 2; 25 mA sink at VO=1V, 310 μA source at VO=GND, push-pull design for LED drive. |
| 7 | P3 | bidirectional | P-port quasi-bidirectional input/output 3; 25 mA sink at VO=1V, 310 μA source at VO=GND, push-pull design for LED drive. |
| 8 | GND | power_in | Ground. |
| 9 | P4 | bidirectional | P-port quasi-bidirectional input/output 4; 25 mA sink at VO=1V, 310 μA source at VO=GND, push-pull design for LED drive. |
| 10 | P5 | bidirectional | P-port quasi-bidirectional input/output 5; 25 mA sink at VO=1V, 310 μA source at VO=GND, push-pull design for LED drive. |
| 11 | P6 | bidirectional | P-port quasi-bidirectional input/output 6; 25 mA sink at VO=1V, 310 μA source at VO=GND, push-pull design for LED drive. |
| 12 | P7 | bidirectional | P-port quasi-bidirectional input/output 7; 25 mA sink at VO=1V, 310 μA source at VO=GND, push-pull design for LED drive. |
| 13 | INT | output | Interrupt output with open-drain structure; 1.6 mA sink at VO=0.4V; must connect to VCC through pullup resistor. |
| 14 | SCL | input | I2C serial clock line input; must connect to VCC through pullup resistor. |
| 15 | SDA | bidirectional | I2C serial data line, bidirectional; must connect to VCC through pullup resistor. |
| 16 | VCC | power_in | Positive supply voltage; operating range 2.5V to 6V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-16-300mil |
| Category | Interface |
| Pins | 16 |
CAD (KiCad official)
- Symbol:
PCF8574ADWR - Footprint:
Package_SO:SOIC-16_3.9x9.9mm_P1.27mm - 3D model: SOIC-16-300mil (KiCad packages3D, STEP)
- 3D model files:
pcf8574adwr-etched.step/pcf8574adwr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);pcf8574adwr.step/pcf8574adwr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (36 pp, sha256
1f4e09d7135c1661, retrieved 2026-09-23, 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: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).