
PoppyIO
Rahix/Poppy-Logic-Controller
A budget PLC-like board for controlling 24V DC equipment.
The PCA9538PW is an i, O Expander made by Texas Instruments in a TSSOP-16 package with 16 pins. -40℃~+85℃ 1.9uA 10mA 2.3V~5.5V 25mA 4 4.1V 400kHz 8 I2C、SMBus Interrupt Output Push-Pull Reset function、Cascading and address extension、Built-in LED driver TSSOP-16 I/O Expanders ROHS.
PCBKit's library has its KiCad symbol (Interface_Expansion:PCA9538PW, from KiCad's library) and its footprint (Package_SO:TSSOP-16_4.4x5mm_P0.65mm, from KiCad's library), ready for a KiCad board. 3,645 are in stock at JLCPCB (part C201530). 2 open-source boards in 2 repositories on GitHub use it.
| Pin | Name | Type |
|---|---|---|
| 1 | A0 | Input |
| 2 | A1 | Input |
| 3 | RESET | Input |
| 4 | IO0 | Input/output |
| 5 | IO1 | Input/output |
| 6 | IO2 | Input/output |
| 7 | IO3 | Input/output |
| 8 | V_{SS} | Power in |
| 9 | IO4 | Input/output |
| 10 | IO5 | Input/output |
| 11 | IO6 | Input/output |
| 12 | IO7 | Input/output |
| 13 | INT | Open collector |
| 14 | SCL | Input |
| 15 | SDA | Input/output |
| 16 | V_{DD} | Power in |

Rahix/Poppy-Logic-Controller
A budget PLC-like board for controlling 24V DC equipment.

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<iframe src="https://pcbkit.io/embed/parts/ti/PCA9538PW" title="PCA9538PW in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe><img src="https://pcbkit.io/embed/parts/ti/PCA9538PW.jpg" alt="PCA9538PW" width="1200" height="900">[](https://pcbkit.io/parts/ti/PCA9538PW)Yes. The symbol is Interface_Expansion:PCA9538PW and the footprint Package_SO:TSSOP-16_4.4x5mm_P0.65mm, both drawn on this page. PCBKit places them on a board for you when you design with it.
TSSOP-16, with 16 pins. Its footprint is drawn on this page.
Texas Instruments publishes it: the Datasheet link on this page opens it.
JLCPCB lists it as part C201530, with 3,645 in stock; the sellers' links on this page open their listings.
Parts like it in the library: the PCA9554PW by NXP Semiconductors, the PCA9557PW by NXP Semiconductors, the TCA9534PW by Texas Instruments and the TCA9534APW by Texas Instruments. Check their datasheets: a part that fits the footprint may still differ in its ratings.
2 boards in 2 repositories on GitHub; the most starred are listed on this page, with their KiCad files.