The PCA9539PW is an i, O Expander made by NXP Semiconductors in a TSSOP-24 package with 24 pins. -40℃~+85℃ 16 1uA 2.3V~5.5V 4 400kHz I2C、SMBus Interrupt Output Reset function、Cascading and address extension TSSOP-24 I/O Expanders ROHS.
PCBKit's library has its KiCad symbol (EasyEDA_Cloud:PCA9539PWRG4, from EasyEDA) and its footprint (Package_SO:TSSOP-24_4.4x7.8mm_P0.65mm, from KiCad's library), ready for a KiCad board. 25,615 are in stock at JLCPCB (part C129516). 3 open-source boards in 2 repositories on GitHub use it.
| Pin | Name | Type |
|---|---|---|
| 1 | INT# | Unspecified |
| 2 | A1 | Unspecified |
| 3 | RESET# | Unspecified |
| 4 | IO0_0 | Unspecified |
| 5 | IO0_1 | Unspecified |
| 6 | IO0_2 | Unspecified |
| 7 | IO0_3 | Unspecified |
| 8 | IO0_4 | Unspecified |
| 9 | IO0_5 | Unspecified |
| 10 | IO0_6 | Unspecified |
| 11 | IO0_7 | Unspecified |
| 12 | VSS | Unspecified |
| 13 | IO1_0 | Unspecified |
| 14 | IO1_1 | Unspecified |
| 15 | IO1_2 | Unspecified |
| 16 | IO1_3 | Unspecified |
| 17 | IO1_4 | Unspecified |
| 18 | IO1_5 | Unspecified |
| 19 | IO1_6 | Unspecified |
| 20 | IO1_7 | Unspecified |
| 21 | A0 | Unspecified |
| 22 | SCL | Unspecified |
| 23 | SDA | Unspecified |
| 24 | VDD | Unspecified |
PE1RGU/hf-antenna-switch
Remote HF antenna switch: 3 radios x 4 antennas (path to 8), outdoor relay unit with a hardware safety chain, controlled over Cat6 from a shack interface. KiCad 10, open hardware, designed together with an AI.
entropia/Teebeutel-Hardware
Teebeutel (eng. Teabag) is an electronic, Entropia themed con-badge for the GPN20, featuring an ESP32 microprocessor running micropython.
PE1RGU/hf-antenna-switch
Remote HF antenna switch: 3 radios x 4 antennas (path to 8), outdoor relay unit with a hardware safety chain, controlled over Cat6 from a shack interface. KiCad 10, open hardware, designed together with an AI.
<iframe src="https://pcbkit.io/embed/parts/nxp/PCA9539PW" title="PCA9539PW 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/PCA9539PW.jpg" alt="PCA9539PW" width="1200" height="900">[](https://pcbkit.io/parts/nxp/PCA9539PW)Yes. The symbol is EasyEDA_Cloud:PCA9539PWRG4 and the footprint Package_SO:TSSOP-24_4.4x7.8mm_P0.65mm, both drawn on this page. PCBKit places them on a board for you when you design with it.
TSSOP-24, with 24 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 C129516, with 25,615 in stock; the sellers' links on this page open their listings.
Parts like it in the library: the PCA9555PW by NXP Semiconductors, the TCA9535PW by Texas Instruments, the TCA9555PW by Texas Instruments and the PCA9535PW by NXP Semiconductors. Check their datasheets: a part that fits the footprint may still differ in its ratings.
3 boards in 2 repositories on GitHub; the most starred are listed on this page, with their KiCad files.
