component
TCA9545APWR
Public Made by Adomby adom
Texas Instruments Signal Switches, Multiplexers, Decoders, TSSOP-20. Pinout cross-checked by two models against the datasheet, 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
markdownTCA9545APWR
Texas Instruments · Signal Switches, Multiplexers, Decoders · TSSOP-20
TCA9545APWR from Texas Instruments, in a TSSOP-20. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | A0 | input | Hardware address input 0; connect directly to VCC or ground. |
| 2 | A1 | input | Hardware address input 1; connect directly to VCC or ground. |
| 3 | RESET | input | Active-low reset input; requires minimum 6 ns low pulse to reset device and deselect all channels. |
| 4 | INT0 | input | Active-low interrupt input 0 for channel 0; connect to VDPU0 through pull-up resistor. |
| 5 | SD0 | bidirectional | Serial data 0; I2C channel 0 data line, connect to VDPU0 through pull-up resistor. |
| 6 | SC0 | bidirectional | Serial clock 0; I2C channel 0 clock line, connect to VDPU0 through pull-up resistor. |
| 7 | INT1 | input | Active-low interrupt input 1 for channel 1; connect to VDPU1 through pull-up resistor. |
| 8 | SD1 | bidirectional | Serial data 1; I2C channel 1 data line, connect to VDPU1 through pull-up resistor. |
| 9 | SC1 | bidirectional | Serial clock 1; I2C channel 1 clock line, connect to VDPU1 through pull-up resistor. |
| 10 | GND | power_in | Ground; maximum continuous current ±100 mA. |
| 11 | INT2 | input | Active-low interrupt input 2 for channel 2; connect to VDPU2 through pull-up resistor. |
| 12 | SD2 | bidirectional | Serial data 2; I2C channel 2 data line, connect to VDPU2 through pull-up resistor. |
| 13 | SC2 | bidirectional | Serial clock 2; I2C channel 2 clock line, connect to VDPU2 through pull-up resistor. |
| 14 | INT3 | input | Active-low interrupt input 3 for channel 3; connect to VDPU3 through pull-up resistor. |
| 15 | SD3 | bidirectional | Serial data 3; I2C channel 3 data line, connect to VDPU3 through pull-up resistor. |
| 16 | SC3 | bidirectional | Serial clock 3; I2C channel 3 clock line, connect to VDPU3 through pull-up resistor. |
| 17 | INT | output | Active-low interrupt output; logical AND of all INT0-INT3 inputs, connect to VDPUM through pull-up resistor. |
| 18 | SCL | bidirectional | Serial clock line (master); I2C master clock, connect to VDPUM through pull-up resistor. |
| 19 | SDA | bidirectional | Serial data line (master); I2C master data, connect to VDPUM through pull-up resistor. |
| 20 | VCC | power_in | Supply power; operating voltage range 1.65 V to 5.5 V, maximum continuous current ±100 mA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | TSSOP-20 |
| Category | Logic |
| Pins | 20 |
CAD (KiCad official)
- Symbol:
TCA9545APWR - Footprint:
Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm - 3D model: TSSOP-20 (KiCad packages3D, STEP)
- 3D model files:
tca9545apwr-etched.step/tca9545apwr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);tca9545apwr.step/tca9545apwr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (30 pp, sha256
b4f5739b34babd82, retrieved 2026-09-26, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-4-6(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).