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I2C General Purpose I/O Expanders

NXP Semiconductors I²C General Purpose I/O Expanders provide GPIO expansion for most microprocessor families, allowing designers to save the GPIOs on microprocessors for other important functions. Designers can utilize the microprocessor GPIOs for important functions and use the I/O expander for other duties, including system monitoring, ACPI power switches, sensors, push buttons, LEDs, fans, and more. NXP GPIO expanders are ideal for adding fan and LED control to systems. They are also ideal for monitoring system functions and accepting push-button inputs.

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Select	Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (GBP) Filter the results in the table by unit price based on your quantity.	Qty.	RoHS	ECAD Model	Series	Mounting Style	Package/Case	Interface Type	Number of I/Os	Interrupt Output	Supply Voltage - Min	Supply Voltage - Max	Maximum Clock Frequency	Minimum Operating Temperature	Maximum Operating Temperature	Packaging	ESD Protection
	Interface - I/O Expanders 16-bit I2C-bus/SMBus I/O Expander with Interrupt and Agile I/O in TSSOP24 package PCAL9555APW,118 NXP Semiconductors 1: £1.52 4,480In Stock	Mfr. Part No. PCAL9555APW,118 Mouser Part No 771-PCAL9555APW118	NXP Semiconductors	Interface - I/O Expanders 16-bit I2C-bus/SMBus I/O Expander with Interrupt and Agile I/O in TSSOP24 package Learn More about NXP Semiconductors nxp gpioexpanders	Datasheet	4,480In Stock	Cut Tape £1.52 £1.12 £1.01 £0.899 View Reel £0.759 £0.849 £0.818 £0.759 MouseReel Available	Min.: 1 Mult.: 1 : 2,500			PCAL9555A	SMD/SMT	TSSOP-24	I2C, Serial	16 I/O	With Interrupt	1.65 V	5.5 V	100 kHz	- 40 C	+ 85 C	Reel, Cut Tape, MouseReel	2 kV
	Interface - I/O Expanders 16-bit I2C-bus I/O Expander with Interrupt, Low Voltage version of PCA9535 in TSSOP24 package PCA9535APW,118 NXP Semiconductors 1: £1.57 135In Stock 12,500On Order	Mfr. Part No. PCA9535APW,118 Mouser Part No 771-PCA9535APW,118	NXP Semiconductors	Interface - I/O Expanders 16-bit I2C-bus I/O Expander with Interrupt, Low Voltage version of PCA9535 in TSSOP24 package Learn More about NXP Semiconductors nxp gpioexpanders	Datasheet	135In Stock 12,500On Order	Cut Tape £1.57 £1.15 £1.05 £0.943 View Reel £0.818 £0.882 £0.856 £0.818 MouseReel Available	Min.: 1 Mult.: 1 : 2,500			PCA9535A	SMD/SMT	TSSOP-24	I2C, Serial, SMBus	16 I/O	With Interrupt	1.65 V	5.5 V	100 kHz	- 40 C	+ 85 C	Reel, Cut Tape, MouseReel	2 kV
	Interface - I/O Expanders 8-bit I2C-bus/SMBus Level Translating I/O Expander with Interrupt and Reset in XQFN16 package PCA6408AHKX NXP Semiconductors 1: £0.917 244,985On Order	Mfr. Part No. PCA6408AHKX Mouser Part No 771-PCA6408AHKX	NXP Semiconductors	Interface - I/O Expanders 8-bit I2C-bus/SMBus Level Translating I/O Expander with Interrupt and Reset in XQFN16 package Learn More about NXP Semiconductors nxp gpioexpanders	Datasheet	244,985On Order On Order Ship Dates Mfr. No: PCA6408AHKX Stock: 0 On Order: 72,985 Expected 31/05/2027 68,000 Expected 06/09/2027 104,000 Expected 22/11/2027 Factory Lead Time: 30 Weeks	Cut Tape £0.917 £0.663 £0.599 £0.53 View Reel £0.432 £0.497 £0.477 £0.461 £0.453 £0.432 MouseReel Available	Min.: 1 Mult.: 1 : 4,000			PCA6408A	SMD/SMT	XQFN-16	I2C, Serial, SMBus	8 I/O	With Interrupt	1.65 V	5.5 V	400 kHz	- 40 C	+ 85 C	Reel, Cut Tape, MouseReel	2 kV
	Interface - I/O Expanders 16-bit I2C-bus I/O Expander with Interrupt and Reset in TSSOP24 package PCA9539APW,118 NXP Semiconductors 1: £1.43 16,179On Order	Mfr. Part No. PCA9539APW,118 Mouser Part No 771-PCA9539APW,118	NXP Semiconductors	Interface - I/O Expanders 16-bit I2C-bus I/O Expander with Interrupt and Reset in TSSOP24 package Learn More about NXP Semiconductors nxp gpioexpanders	Datasheet	16,179On Order On Order Ship Dates Mfr. No: PCA9539APW,118 Stock: 0 On Order: 1,179 Expected 17/11/2026 15,000 Expected 14/01/2027 Factory Lead Time: 30 Weeks	Cut Tape £1.43 £1.06 £0.96 £0.856 View Reel £0.739 £0.818 £0.796 £0.739 MouseReel Available	Min.: 1 Mult.: 1 : 2,500			PCA9539A	SMD/SMT	TSSOP-24	I2C, Serial, SMBus	16 I/O	With Interrupt	1.65 V	5.5 V	100 kHz	- 40 C	+ 85 C	Reel, Cut Tape, MouseReel	2 kV
	Interface - I/O Expanders 16-bit I2C-bus I/O Expander with Interrupt in TSSOP24 package PCA9555APW,118 NXP Semiconductors 1: £1.52 9,995On Order	Mfr. Part No. PCA9555APW,118 Mouser Part No 771-PCA9555APW118	NXP Semiconductors	Interface - I/O Expanders 16-bit I2C-bus I/O Expander with Interrupt in TSSOP24 package Learn More about NXP Semiconductors nxp gpioexpanders	Datasheet	9,995On Order On Order Ship Dates Mfr. No: PCA9555APW,118 Stock: 0 On Order: 4,995 Expected 25/01/2027 5,000 Expected 22/02/2027 Factory Lead Time: 30 Weeks	Cut Tape £1.52 £1.12 £1.01 £0.899 View Reel £0.759 £0.849 £0.818 £0.759 MouseReel Available	Min.: 1 Mult.: 1 : 2,500			PCA9555A	SMD/SMT	TSSOP-24	I2C, Serial, SMBus	16 I/O	With Interrupt	1.65 V	5.5 V	100 kHz	- 40 C	+ 85 C	Reel, Cut Tape, MouseReel	2 kV
	Interface - I/O Expanders 8-bit I2C-bus/SMBus Level Translating I/O Expander with Interrupt, Reset and Agile I/O in X2QFN16 package PCAL6408AEX1Z NXP Semiconductors 1: £1.14 14,967Expected 22/11/2027	Mfr. Part No. PCAL6408AEX1Z Mouser Part No 771-PCAL6408AEX1Z	NXP Semiconductors	Interface - I/O Expanders 8-bit I2C-bus/SMBus Level Translating I/O Expander with Interrupt, Reset and Agile I/O in X2QFN16 package Learn More about NXP Semiconductors nxp gpioexpanders	Datasheet	14,967Expected 22/11/2027	Cut Tape £1.14 £0.882 £0.759 £0.673 View Reel £0.563 £0.632 £0.60 £0.563 MouseReel Available	Min.: 1 Mult.: 1 : 5,000			PCAL6408A	SMD/SMT	X2QFN-16	I2C, Serial, SMBus	8 I/O	With Interrupt	1.65 V	5.5 V	400 kHz	- 40 C	+ 85 C	Reel, Cut Tape, MouseReel	2 kV