Interface - I/O Expanders

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I/O Expanders

Diodes Incorporated I/O Expanders provide up to 16-bits of General Purpose Input/Output (GPIO) expansion for I²C-bus/SMBus applications. These expanders include up to two 8-bit registers to configure the input and output. Diodes Incorporated I/O expanders also include up to two dedicated 8-bit registers to configure the polarity. The data for each input or output is kept in the corresponding input port or output port registers. These registers can be read by the system master. The I/O expanders feature high driving capability, low power supply, individual I/O configuration, 5V tolerance, and smaller packaging. These expanders provide a simple solution when additional I/O is needed for ACPI power switches, sensors, pushbuttons, LEDs, and fans.

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Part #

Interface - I/O Expanders 16-bit I2C and SMBus Port

PI4IOE5V9535ZDEX
Diodes Incorporated
1: $1.47
20,332In Stock

Mfr. Part No.
PI4IOE5V9535ZDEX

Mouser Part No
729-PI4IOE5V9535ZDEX

Diodes Incorporated

Interface - I/O Expanders 16-bit I2C and SMBus Port

Learn More

Datasheet

20,332In Stock

Cut Tape

$1.47

$1.08

$0.974

$0.865

$0.813

Reel

$0.813

MouseReel Available

Min.: 1
Mult.: 1
Max.: 330

: 3,500

PIO4IO

SMD/SMT

TQFN-24

I2C, Serial, SMBus

16 I/O

With Interrupt

2.3 V

5.5 V

400 kHz

- 40 C

+ 85 C

Reel, Cut Tape, MouseReel

4 kV

Interface - I/O Expanders 48-bit I2C-bus I/O Expander

PI4IOE5V96248ZLEX
Diodes Incorporated
1: $2.63
2,844In Stock
3,000Expected 14/08/2026

Mfr. Part No.
PI4IOE5V96248ZLEX

Mouser Part No
729-I4IOE5V96248ZLEX

Diodes Incorporated

Interface - I/O Expanders 48-bit I2C-bus I/O Expander

Learn More

Datasheet

2,844In Stock

3,000Expected 14/08/2026

Cut Tape

$2.63

$1.96

$1.80

$1.61

$1.53

Reel

$1.53

MouseReel Available

Min.: 1
Mult.: 1
Max.: 260

: 3,000

PIO4IO

SMD/SMT

TQFN-56

I2C, Serial

48 I/O

With Interrupt

2.3 V

5.5 V

1 MHz

- 40 C

+ 85 C

Reel, Cut Tape, MouseReel

4 kV

Interface - I/O Expanders 16-bit I2C and SMBus Port

PI4IOE5V9535LEX
Diodes Incorporated
1: $1.31
3,393In Stock
3,000On Order

Mfr. Part No.
PI4IOE5V9535LEX

Mouser Part No
729-PI4IOE5V9535LEX

Diodes Incorporated

Interface - I/O Expanders 16-bit I2C and SMBus Port

Learn More

Datasheet

3,393In Stock

3,000On Order

Cut Tape

$1.31

$0.95

$0.861

$0.762

$0.715

Reel

$0.715

MouseReel Available

Min.: 1
Mult.: 1
Max.: 250

: 3,000

PIO4IO

SMD/SMT

TSSOP-24

I2C, Serial, SMBus

16 I/O

With Interrupt

2.3 V

5.5 V

400 kHz

- 40 C

+ 85 C

Reel, Cut Tape, MouseReel

4 kV

Interface - I/O Expanders 4-bit I2C and SMBus low power I/O port

PI4IOE5V9536UEX
Diodes Incorporated
1: $1.17
2,964In Stock
2,500Expected 21/10/2026

Mfr. Part No.
PI4IOE5V9536UEX

Mouser Part No
729-PI4IOE5V9536UEX

Diodes Incorporated

Interface - I/O Expanders 4-bit I2C and SMBus low power I/O port

Learn More

Datasheet

2,964In Stock

2,500Expected 21/10/2026

Cut Tape

$1.17

$0.844

$0.764

$0.675

Reel

$0.675

MouseReel Available

Min.: 1
Mult.: 1
Max.: 230

: 2,500

PIO4IO

SMD/SMT

MSOP-8

I2C, Serial, SMBus

4 I/O

Without Interrupt

2.3 V

5.5 V

1 MHz

- 40 C

+ 85 C

Reel, Cut Tape, MouseReel

4 kV

Interface - I/O Expanders 8-bit I2C and SMBus IO Port

PI4IOE5V9554ALEX
Diodes Incorporated
1: $1.14
4,235In Stock

Mfr. Part No.
PI4IOE5V9554ALEX

Mouser Part No
729-PI4IOE5V9554ALEX

Diodes Incorporated

Interface - I/O Expanders 8-bit I2C and SMBus IO Port

Learn More

Datasheet

4,235In Stock

Cut Tape

$1.14

$0.825

$0.746

$0.659

Reel

$0.659

MouseReel Available

Min.: 1
Mult.: 1
Max.: 160

: 2,500

PIO4IO

SMD/SMT

TSSOP-16

I2C, Serial, SMBus

8 I/O

With Interrupt

2.3 V

5.5 V

400 kHz

- 40 C

+ 85 C

Reel, Cut Tape, MouseReel

4 kV

Interface - I/O Expanders 8-bit I2C and SMBus IO Port

PI4IOE5V9554LEX
Diodes Incorporated
1: $1.24
3,543In Stock

Mfr. Part No.
PI4IOE5V9554LEX

Mouser Part No
729-PI4IOE5V9554LEX

Diodes Incorporated

Interface - I/O Expanders 8-bit I2C and SMBus IO Port

Learn More

Datasheet

3,543In Stock

Cut Tape

$1.24

$0.90

$0.815

$0.721

$0.676

Reel

$0.676

Min.: 1
Mult.: 1
Max.: 470

: 2,500

PIO4IO

SMD/SMT

TSSOP-16

I2C, Serial, SMBus

8 I/O

With Interrupt

2.3 V

5.5 V

400 kHz

- 40 C

+ 85 C

Reel, Cut Tape

4 kV

Interface - I/O Expanders 16-bit I2C and SMBus low power I/O port

PI4IOE5V9539LE
Diodes Incorporated
1: $1.32
41In Stock

Mfr. Part No.
PI4IOE5V9539LE

Mouser Part No
729-PI4IOE5V9539LE

Diodes Incorporated

Interface - I/O Expanders 16-bit I2C and SMBus low power I/O port

Learn More

Datasheet

41In Stock

$1.32

$0.959

$0.80

Min.: 1
Mult.: 1

PIO4IO

SMD/SMT

TSSOP-24

I2C, Serial, SMBus

16 I/O

With Interrupt

2.3 V

5.5 V

400 kHz

- 40 C

+ 85 C

Tube

Interface - I/O Expanders 16-bit I2C and SMBus low power I/O port

PI4IOE5V9539LEX
Diodes Incorporated
1: $1.32
802In Stock
3,000Expected 24/08/2026

Mfr. Part No.
PI4IOE5V9539LEX

Mouser Part No
729-PI4IOE5V9539LEX

Diodes Incorporated

Interface - I/O Expanders 16-bit I2C and SMBus low power I/O port

Learn More

Datasheet

802In Stock

3,000Expected 24/08/2026

Cut Tape

$1.32

$0.959

$0.87

$0.77

Reel

$0.641

View

Min.: 1
Mult.: 1

: 3,000

PIO4IO

SMD/SMT

TSSOP-24

I2C, Serial, SMBus

16 I/O

With Interrupt

2.3 V

5.5 V

400 kHz

- 40 C

+ 85 C

Reel, Cut Tape

Interface - I/O Expanders 16-bit I2C and SMBus low power I/O port

PI4IOE5V9539ZDEX
Diodes Incorporated
1: $1.36
161In Stock
7,000On Order

Mfr. Part No.
PI4IOE5V9539ZDEX

Mouser Part No
729-PI4IOE5V9539ZDEX

Diodes Incorporated

Interface - I/O Expanders 16-bit I2C and SMBus low power I/O port

Learn More

Datasheet

161In Stock

7,000On Order

Cut Tape

$1.36

$0.982

$0.889

$0.787

$0.739

Reel

$0.739

MouseReel Available

Min.: 1
Mult.: 1
Max.: 380

: 3,500

PIO4IO

SMD/SMT

TQFN-24

I2C, Serial, SMBus

16 I/O

With Interrupt

2.3 V

5.5 V

400 kHz

- 40 C

+ 85 C

Reel, Cut Tape, MouseReel

4 kV

Interface - I/O Expanders 8-bit I2C and SMBus IO Port

PI4IOE5V9554LE
Diodes Incorporated
1: $1.29
120In Stock

Mfr. Part No.
PI4IOE5V9554LE

Mouser Part No
729-PI4IOE5V9554LE

Diodes Incorporated

Interface - I/O Expanders 8-bit I2C and SMBus IO Port

Learn More

Datasheet

120In Stock

$1.29

$0.937

$0.754

$0.717

View

Min.: 1
Mult.: 1

PIO4IO

SMD/SMT

TSSOP-16

I2C, Serial, SMBus

8 I/O

With Interrupt

2.3 V

5.5 V

400 kHz

- 40 C

+ 85 C

Tube

4 kV

Interface - I/O Expanders 16-bit I2C-bus and SMBus I/O port

PI4IOE5V9555LEX
Diodes Incorporated
1: $1.28
729In Stock
3,000Expected 26/03/2027

Mfr. Part No.
PI4IOE5V9555LEX

Mouser Part No
729-PI4IOE5V9555LEX

Diodes Incorporated

Interface - I/O Expanders 16-bit I2C-bus and SMBus I/O port

Learn More

Datasheet

729In Stock

3,000Expected 26/03/2027

Cut Tape

$1.28

$0.931

$0.844

$0.774

Reel

$0.774

Min.: 1
Mult.: 1
Max.: 210

: 3,000

PIO4IO

SMD/SMT

TSSOP-24

I2C, Serial, SMBus

8 I/O

With Interrupt

2.3 V

5.5 V

400 kHz

- 40 C

+ 85 C

Reel, Cut Tape

4 kV

Interface - I/O Expanders 16-bit I2C-bus and SMBus I/O port

PI4IOE5V9555ZDEX
Diodes Incorporated
1: $1.46
285In Stock
3,500Expected 15/07/2026

Mfr. Part No.
PI4IOE5V9555ZDEX

Mouser Part No
729-PI4IOE5V9555ZDEX

Diodes Incorporated

Interface - I/O Expanders 16-bit I2C-bus and SMBus I/O port

Learn More

Datasheet

285In Stock

3,500Expected 15/07/2026

Cut Tape

$1.46

$1.07

$0.965

$0.856

View

Reel

$0.783

MouseReel Available

Min.: 1
Mult.: 1
Max.: 580

: 3,500

PIO4IO

SMD/SMT

TQFN-24

I2C, Serial, SMBus

8 I/O

With Interrupt

2.3 V

5.5 V

400 kHz

- 40 C

+ 85 C

Reel, Cut Tape, MouseReel

4 kV

Interface - I/O Expanders 24-bit I2C-bus I/O Expander

PI4IOE5V96224ZLEX
Diodes Incorporated
1: $2.21
12,997On Order

Mfr. Part No.
PI4IOE5V96224ZLEX

Mouser Part No
729-I4IOE5V96224ZLEX

Diodes Incorporated

Interface - I/O Expanders 24-bit I2C-bus I/O Expander

Learn More

Datasheet

12,997On Order

Cut Tape

$2.21

$1.64

$1.50

$1.34

$1.26

Reel

$1.14

MouseReel Available

Min.: 1
Mult.: 1
Max.: 3,500

: 3,500

PIO4IO

SMD/SMT

TQFN-32

I2C, Serial

24 I/O

With Interrupt

2.3 V

5.5 V

1 MHz

- 40 C

+ 85 C

Reel, Cut Tape, MouseReel

4 kV

Interface - I/O Expanders 8-bit I2C and SMBus low power I/O port

PI4IOE5V9538LE
Diodes Incorporated
1: $1.14
10,944Factory Stock Available

Mfr. Part No.
PI4IOE5V9538LE

Mouser Part No
729-PI4IOE5V9538LE

Diodes Incorporated

Interface - I/O Expanders 8-bit I2C and SMBus low power I/O port

Learn More

Datasheet

10,944Factory Stock Available

More Info Available

$1.14

$0.826

$0.662

$0.649

View

Min.: 1
Mult.: 1

PIO4IO

SMD/SMT

TSSOP-16

I2C, Serial, SMBus

8 I/O

With Interrupt

2.3 V

5.5 V

400 kHz

- 40 C

+ 85 C

Tube

4 kV

Interface - I/O Expanders 16-bit I2C-bus and SMBus I/O port

PI4IOE5V9555LE
Diodes Incorporated
1: $1.38
Non-Stocked Lead-Time 35 Weeks

Mfr. Part No.
PI4IOE5V9555LE

Mouser Part No
729-PI4IOE5V9555LE

Diodes Incorporated

Interface - I/O Expanders 16-bit I2C-bus and SMBus I/O port

Learn More

Datasheet

Non-Stocked Lead-Time 35 Weeks

$1.38

$1.00

$0.833

$0.80

Min.: 1
Mult.: 1

PIO4IO

SMD/SMT

TSSOP-24

I2C, Serial, SMBus

8 I/O

With Interrupt

2.3 V

5.5 V

400 kHz

- 40 C

+ 85 C

Tube

I/O Expanders

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