

Overview
The PCAL6408AHK is an i, O Expander made by NXP Semiconductors with 16 pins. Reset function、Cascading and address extension、Built-in LED driver、IO level configurable - I/O Expanders ROHS.
PCBKit's library has its KiCad symbol (Interface_Expansion:PCAL6408AHK, from KiCad's library) and its footprint (Package_DFN_QFN:UQFN-16_1.8x2.6mm_P0.4mm, from KiCad's library), ready for a KiCad board. JLCPCB lists it (part C3170285). 2 open-source boards in 1 repository on GitHub use it.
Symbol
Footprint
Order codes
1- PCAL6408AHKLCSC C3170285
Pinout
16| Pin | Name | Type |
|---|---|---|
| 1 | RESET | Input |
| 2 | P0 | Input/output |
| 3 | P1 | Input/output |
| 4 | P2 | Input/output |
| 5 | P3 | Input/output |
| 6 | V_{SS} | Power in |
| 7 | P4 | Input/output |
| 8 | P5 | Input/output |
| 9 | P6 | Input/output |
| 10 | P7 | Input/output |
| 11 | INT | Open collector |
| 12 | SCL | Input |
| 13 | SDA | Input/output |
| 14 | V_{DD(P)} | Power in |
| 15 | V_{DD(I2C)} | Power in |
| 16 | ADDR | Input |
Open-source boards using it
All 2- 6 layers54 × 28 mm

- 6 layers54 × 28 mm

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Is there a KiCad symbol and footprint for the PCAL6408AHK?
Yes. The symbol is Interface_Expansion:PCAL6408AHK and the footprint Package_DFN_QFN:UQFN-16_1.8x2.6mm_P0.4mm, both drawn on this page. PCBKit places them on a board for you when you design with it.
Where can I order the PCAL6408AHK?
JLCPCB lists it as part C3170285, with 0 in stock; the sellers' links on this page open their listings.
What can replace the PCAL6408AHK?
Parts like it in the library: the FXL6408UMX by onsemi, the PI4IOE5V6408ZTAEX by Diodes Incorporated and the TCA6408ARSVR by Texas Instruments. Check their datasheets: a part that fits the footprint may still differ in its ratings.
Which open-source boards use the PCAL6408AHK?
2 boards in 1 repository on GitHub; the most starred are listed on this page, with their KiCad files.
Parts like it
3FXL6408UMX
UQFN-16(1.8x2.6)-40℃~+85℃ 1.5uA 1.65V~3.6V 400kHz 6mA 6mA 8 I2C Interrupt Output Open-drain Reset function、Cascade and address expansion、IO level configurable UQFN-16(1.8x2.6) I/O Expanders ROHSonsemiI/O ExpandersPI4IOE5V6408ZTAEX
UQFN-16(1.8x2.6)-40℃~+85℃ 1.5uA 1.65V~3.6V 1MHz 6mA 6mA 8 I2C Interrupt Output Push-Pull Reset function、Cascade and address expansion、IO level configurable UQFN-16(1.8x2.6) I/O Expanders ROHSDiodes IncorporatedI/O ExpandersTCA6408ARSVR
UQFN-16(1.8x2.6)-40℃~+85℃ 1.65V~5.5V 10mA 1uA 2 200mV 25mA 4.1V 400kHz 8 I2C、SMBus Interrupt Output Push-Pull Reset function、Cascading and address extension、Built-in LED driver、IO level configurable UQFN-16(1.8x2.6) I/O Expanders ROHSTexas InstrumentsI/O Expanders