PCA9544AD

NXP Semiconductors

Bidirectional analog channel、Level shifting、Control interface integration、Fail-safe disconnect、Hot-swap protection SO-20 Analog Switches - Special Purpose ROHS

Extended

nxp/PCA9544AD

Category: Interface ICs
Package: SO-20
Pins: 20

Overview

The PCA9544AD is an interface IC made by NXP Semiconductors in a SO-20 package with 20 pins. Bidirectional analog channel、Level shifting、Control interface integration、Fail-safe disconnect、Hot-swap protection SO-20 Analog Switches - Special Purpose ROHS.

PCBKit's library has its KiCad symbol (Interface_Expansion:PCA9544AD, from KiCad's library) and its footprint (Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm, from KiCad's library), ready for a KiCad board. JLCPCB lists it (part C5365024). 10 open-source boards in 5 repositories on GitHub use it.

Symbol

Interface_Expansion:PCA9544ADFrom KiCad's library

Footprint

Package_SO:SOIC-20W_7.5x12.8mm_P1.27mmFrom KiCad's library

Order codes

PCA9544AD,118LCSC C5365024

Pinout

The pins of the PCA9544AD
Pin	Name	Type
1	A0	Input
2	A1	Input
3	A2	Input
4	INT0	Input
5	SD0	Input/output
6	SC0	Output
7	INT1	Input
8	SD1	Input/output
9	SC1	Output
10	VSS	Power in
11	INT2	Input
12	SD2	Input/output
13	SC2	Output
14	INT3	Input
15	SD3	Input/output
16	SC3	Output
17	INT	Open collector
18	SCL	Input
19	SDA	Input/output
20	VDD	Power in

Open-source boards using it

All 10

2 layers120 × 60 mm
Axis V2
Meigs2/Axis
An open source espresso machine controller inspired by the Gaggiuinio Project
53 parts8
2 layers137.5 × 51 mm
Lark
tmshlvck/lark-hw
Lark PCB
112 parts3GPL-3.0
2 layers95 × 95 mm
Blue Pill Board
land-boards/lb-boards
land-boards - Board Designs
57 parts31
2 layers95 × 95 mm
Blue Pill Board
land-boards/lb-boards
land-boards - Board Designs
53 parts31
2 layers49 × 49 mm
I2C RPT-01
land-boards/lb-boards
land-boards - Board Designs
35 parts31
2 layers49 × 49 mm
RPI I2C HUB
land-boards/lb-boards
land-boards - Board Designs
32 parts31
2 layers49 × 49 mm
RPI I2C HUB
land-boards/lb-boards
land-boards - Board Designs
31 parts31
2 layers49 × 49 mm
I2C SERIAL
kitspace-test-repos/kicad6-file-collection

35 partsMIT

Show this part on your page

A live frame, for any web page

<iframe src="https://pcbkit.io/embed/parts/nxp/PCA9544AD" title="PCA9544AD in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe>

A picture

<img src="https://pcbkit.io/embed/parts/nxp/PCA9544AD.jpg" alt="PCA9544AD" width="1200" height="900">

A picture that opens the part, for a README

[![PCA9544AD](https://pcbkit.io/embed/parts/nxp/PCA9544AD.jpg?size=s)](https://pcbkit.io/parts/nxp/PCA9544AD)

Questions

Is there a KiCad symbol and footprint for the PCA9544AD?

Yes. The symbol is Interface_Expansion:PCA9544AD and the footprint Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm, both drawn on this page. PCBKit places them on a board for you when you design with it.

What package is the PCA9544AD?

SO-20, with 20 pins. Its footprint is drawn on this page.

Where can I order the PCA9544AD?

JLCPCB lists it as part C5365024, with 0 in stock; the sellers' links on this page open their listings.

Which open-source boards use the PCA9544AD?

10 boards in 5 repositories on GitHub; the most starred are listed on this page, with their KiCad files.