

Overview
The PCAL9538APWJ is an i, O Expander made by NXP Semiconductors in a TSSOP-16 package with 17 pins. -40℃~+85℃ 1.65V~5.5V 400kHz I2C、SMBus Interrupt Output Reset function、Cascading and address extension、Built-in LED driver TSSOP-16 I/O Expanders ROHS.
PCBKit's library has its KiCad symbol (pcal9538a:PCAL9538A, from Agg-kicad) and its footprint (agg:QFN-16-EP-NXP, from Agg-kicad), ready for a KiCad board. JLCPCB lists it (part C2652336). 1 open-source board in 1 repository on GitHub use it.
Symbol
Footprint
Parameters
5- Clock Frequency
- 400kHz
- Interface
- I2C;SMBus
- Interrupt Output
- Interrupt Output
- Operating Temperature
- -40℃~+85℃
- Voltage - Supply
- 1.65V~5.5V
Order codes
1- PCAL9538APWJLCSC C2652336
Pinout
17| Pin | Name | Type |
|---|---|---|
| 1 | RESET | Input |
| 2 | P0 | Input/output |
| 3 | P1 | Input/output |
| 4 | P2 | Input/output |
| 5 | P3 | Input/output |
| 6 | VSS | Power in |
| 7 | P4 | Input/output |
| 8 | P5 | Input/output |
| 9 | P6 | Input/output |
| 10 | P7 | Input/output |
| 11 | INT | Open collector |
| 12 | SCL | Open collector |
| 13 | SDA | Open collector |
| 14 | VDD | Power in |
| 15 | A0 | Input |
| 16 | A1 | Input |
| EP | VSS | Power in |
Open-source boards using it
All 1- 4 layers25.4 × 42.9 mm

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Is there a KiCad symbol and footprint for the PCAL9538APWJ?
Yes. The symbol is pcal9538a:PCAL9538A and the footprint agg:QFN-16-EP-NXP, both drawn on this page. PCBKit places them on a board for you when you design with it.
What package is the PCAL9538APWJ?
TSSOP-16, with 17 pins. Its footprint is drawn on this page.
Where can I order the PCAL9538APWJ?
JLCPCB lists it as part C2652336, with 0 in stock; the sellers' links on this page open their listings.
What can replace the PCAL9538APWJ?
Parts like it in the library: the PCAL9538ABSHP by NXP Semiconductors, the PCA9555PW by NXP Semiconductors, the AW9523BTQR by AWINIC and the TCA6416ARTWR by Texas Instruments. Check their datasheets: a part that fits the footprint may still differ in its ratings.
Which open-source boards use the PCAL9538APWJ?
1 board in 1 repository on GitHub; the most starred are listed on this page, with their KiCad files.
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