
Keyboard
mattsains/keyboard
Hardware and software implementation of an asetniop split keyboard

NXP Semiconductors
-40℃~+85℃ 1.65V~5.5V 1uA 2 25mA 400kHz 8 I2C、SMBus Interrupt Output Push-Pull、Open-drain Reset function、Cascading and address extension、Built-in LED driver、IO level configurable TSSOP-16 I/O Expanders ROHS
The PCAL6408APWJ is an i, O Expander made by NXP Semiconductors in a TSSOP-16 package with 16 pins. -40℃~+85℃ 1.65V~5.5V 1uA 2 25mA 400kHz 8 I2C、SMBus Interrupt Output Push-Pull、Open-drain Reset function、Cascading and address extension、Built-in LED driver、IO level configurable TSSOP-16 I/O Expanders ROHS.
PCBKit's library has its KiCad symbol (Interface_Expansion:PCAL6408APW, from KiCad's library) and its footprint (Package_SO:TSSOP-16_4.4x5mm_P0.65mm, from KiCad's library), ready for a KiCad board. 103 are in stock at JLCPCB (part C2669732). 1 open-source board in 1 repository on GitHub use it.
| Pin | Name | Type |
|---|---|---|
| 1 | V_{DD(I2C)} | Power in |
| 2 | ADDR | Input |
| 3 | RESET | Input |
| 4 | P0 | Input/output |
| 5 | P1 | Input/output |
| 6 | P2 | Input/output |
| 7 | P3 | Input/output |
| 8 | V_{SS} | Power in |
| 9 | P4 | Input/output |
| 10 | P5 | Input/output |
| 11 | P6 | Input/output |
| 12 | P7 | Input/output |
| 13 | INT | Open collector |
| 14 | SCL | Input |
| 15 | SDA | Input/output |
| 16 | V_{DD(P)} | Power in |

mattsains/keyboard
Hardware and software implementation of an asetniop split keyboard
<iframe src="https://pcbkit.io/embed/parts/nxp/PCAL6408APWJ" title="PCAL6408APWJ in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe><img src="https://pcbkit.io/embed/parts/nxp/PCAL6408APWJ.jpg" alt="PCAL6408APWJ" width="1200" height="900">[](https://pcbkit.io/parts/nxp/PCAL6408APWJ)Yes. The symbol is Interface_Expansion:PCAL6408APW 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.
NXP Semiconductors publishes it: the Datasheet link on this page opens it.
JLCPCB lists it as part C2669732, with 103 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.
1 board in 1 repository on GitHub; the most starred are listed on this page, with their KiCad files.