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I/O Expanders

Manufacturers	Series	Package/Case	Packaging	Product Status	Programmable	Number of I/O	Interface	Interrupt Output	Features	Output Type	Current - Output Source/Sink	Clock Frequency	Voltage - Supply	Operating Temperature	Grade	Qualification	Mounting Type	Supplier Device Package
3PEAK ABLIC Inc. Analog Devices Inc. Analog Devices Inc./Maxim Integrated Broadcom Limited Catalyst Semiconductor Inc. Cypress Semiconductor Corp Diodes Incorporated Harris Corporation Infineon Technologies Intersil Kinetic Technologies Lumissil Microsystems MaxLinear, Inc. Microchip Technology Motorola National Semiconductor Nexperia USA Inc. NOVOSENSE Nuvoton Technology Corporation NXP Semiconductors onsemi Renesas Rochester Electronics, LLC ROHM Semiconductor Sanyo Semtech Corporation Silicon Labs Skyworks Solutions Inc. SMSC SparkFun Electronics STMicroelectronics Texas Instruments	* - Agile CAT9534 CAT9554 CAT9554A CAT9555 MC1200 SAS4xNN Xpander Logic™	- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) 100-LQFP 12-XFQFN 14-CFlatPack 14-DIP (0.300", 7.62mm) 14-SOIC (0.154", 3.90mm Width) 16-DIP (0.300", 7.62mm) 16-SOIC (0.154", 3.90mm Width) 16-SOIC (0.209", 5.30mm Width) 16-SOIC (0.295", 7.50mm Width) 16-SSOP (0.154", 3.90mm Width) 16-SSOP (0.209", 5.30mm Width) 16-TFSOP (0.173", 4.40mm Width) 16-TSSOP (0.173", 4.40mm Width) 16-UFBGA, CSPBGA 16-UFBGA, WLBGA 16-UFQFN 16-VFQFN Exposed Pad 16-VQFN Exposed Pad 16-WFBGA, DSBGA 16-WFQFN Exposed Pad 16-WQFN Exposed Pad 16-XFBGA 16-XFLGA 16-XFQFN 16-XFQFN Exposed Pad 18-DIP (0.300", 7.62mm) 18-SOIC (0.295", 7.50mm Width) 20-LSSOP (0.173", 4.40mm Width) 20-SOIC (0.295", 7.50mm Width) 20-SSOP (0.209", 5.30mm Width) 20-TFSOP (0.173", 4.40mm Width) 20-TSSOP (0.173", 4.40mm Width) 20-UFBGA 20-UFQFN Exposed Pad 20-VFQFN Exposed Pad 20-VQFN Exposed Pad 24-CDIP (0.600", 15.24mm) 24-DIP (0.600", 15.24mm) 24-QFN 24-SOIC (0.295", 7.50mm Width) 24-SOP (0.236", 6.00mm Width) 24-SSOP (0.154", 3.90mm Width) 24-SSOP (0.209", 5.30mm Width) 24-TFSOP (0.173", 4.40mm Width) 24-TSSOP (0.173", 4.40mm Width) 24-TSSOP (0.307", 4.40mm Width) 24-UFBGA 24-VFBGA 24-VFQFN Exposed Pad 24-WFQFN Exposed Pad 24-WFQFN Exposed Pad, CSP 24-XFBGA 24-XFLGA 25-TFBGA 25-UFBGA, WLCSP 25-VFBGA, WLBGA 25-WFBGA, WLCSP 25-XFBGA, DSBGA 28-DIP (0.300", 7.62mm) 28-SOIC (0.295", 7.50mm Width) 28-SSOP (0.209", 5.30mm Width) 28-TSSOP (0.173", 4.40mm Width) 28-UFQFN Exposed Pad 28-VQFN Exposed Pad 28-WFQFN Exposed Pad 32-UFQFN Exposed Pad 32-VFQFN Exposed Pad 32-WFQFN Exposed Pad 35-VFBGA 36-BSOP (0.295", 7.50mm Width) 36-SOP (0.311", 7.90mm Width) 36-TFBGA 36-VFBGA 36-VFBGA, WLBGA 40-CDIP (0.600", 15.24mm) 40-DIP (0.600", 15.24mm) 40-VFQFN Exposed Pad 40-WFQFN Exposed Pad 42-VFBGA 44-LCC (J-Lead) 44-QFP 46-WFQFN Exposed Pad 48-BSSOP (0.295", 7.50mm Width) 56-TFSOP (0.240", 6.10mm Width) 56-VFQFN Exposed Pad 56-WFQFN Exposed Pad 8-SOIC (0.154", 3.90mm Width) 8-TFSOJ (0.069", 1.75mm Width) 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad 8-UFQFN Exposed Pad 8-VFDFN Exposed Pad 8-XFBGA, DSBGA 8-XFDFN Exposed Pad 8-XFQFN Exposed Pad Die	Bag Bulk Tape & Reel (TR) Tray Tube	Active Discontinued at Masstock Electronics Last Time Buy Not For New Designs Obsolete	- Not Verified Verified	- 1 10 14 16 16 (8 Output Only) 16 (Input Only) 18 20 22 24 28 3 34 4 40 48 5 60 8 8 (Input Only) 8 (Output Only) 9	- 1-Wire® 2-Wire CAN (1-Wire) CAN V2.0b CMOS I2C I2C, 2-Wire Serial I2C, JTAG I2C, Serial I2C, SMBus I2C, SPI MIPI® RFFE Parallel Serial SMBus SPI SPI Serial	- No Yes	- ADC, EEPROM, POR, PWM Buzzer Outputs, LED Outputs, POR DAC, POR EEPROM EEPROM, POR EEPROM, POR, PWM EEPROM, POR, PWM, WDT Fan Speed Controller Keypad Controller, LED Output, POR Keypad Controller, POR Keypad Controller, POR, PWM LED Output(s) LED Output(s), POR POR PWM	- CMOS, Open-Drain Open Collector, Open Drain, Push-Pull Open Drain Open Drain, Push-Pull Push-Pull	- 100mA 100µA, 25mA 10mA 10mA, 10mA 10mA, 15mA 10mA, 20mA 10mA, 24mA 10mA, 25mA 12mA 160mA 16mA 18mA, 30mA 1mA, 25mA 1mA, 3mA 2.5mA 20mA 25mA 300µA, 25mA 300µA, 41mA 300µA, 42mA 300µA, 43mA 31mA, 43mA 3mA 4.4mA, 6.1mA 4.5mA, 10mA 42mA 42mA, 480µA 4mA 50mA 65mA 6mA 7mA, 10mA 8mA, 15mA 8mA, 24mA	- 1 MHz 1.7 MHz 10 MHz 100 kHz 20 MHz 25 MHz 26 MHz 3.4 MHz 4 MHz 400 kHz 5 MHz	- 0.8V ~ 3.6V, 1.65V ~ 5.5V 1.08V ~ 3.6V 1.1V ~ 3.6V 1.1V ~ 5.5V, 1.65V ~ 5.5V 1.2V ~ 3.6V 1.2V ~ 5.5V 1.425V ~ 3.6V 1.65V ~ 1.95V 1.65V ~ 3.6V 1.65V ~ 4V 1.65V ~ 5.5V 1.71V ~ 5.5V 1.7V ~ 5.5V 1.8V ~ 3.3V 1.8V ~ 5.5V 2.25V ~ 3.6V 2.3V ~ 3.6V 2.3V ~ 4.5V 2.3V ~ 5.5V 2.4V ~ 5.5V 2.5V ~ 3.6V 2.5V ~ 5.5V 2.5V ~ 6V 2.75V ~ 5.5V 2.7V ~ 3.6V 2.7V ~ 5.5V 2.8V ~ 5.25V 2V ~ 3.6V 2V ~ 5.5V 2V ~ 6V 3.3V 3V ~ 3.6V 3V ~ 5.25V 3V ~ 5.5V 4.2V ~ 6V 4.5V ~ 5.5V 4V ~ 10.5V 4V ~ 6.5V 5.2V	- -20°C ~ 85°C -25°C ~ 85°C -30°C ~ 70°C -30°C ~ 85°C -40°C ~ 105°C -40°C ~ 125°C -40°C ~ 85°C -55°C ~ 125°C 0°C ~ 70°C 0°C ~ 85°C	- Automotive	- AEC-Q100	- Surface Mount Surface Mount, Wettable Flank Through Hole	- 10-MSOP 10-TSSOP 10-VSSOP 100-TQFP (14x14) 12-XQFN (2x1.7) 14-CFlatPack 14-PDIP 14-SOIC 14-SOP 16-DIP 16-DSBGA (2.5x2.12) 16-HVQFN (3x3) 16-HVQFN (4x4) 16-HXQFNU (2x2) 16-PDIP 16-QFN (2.6x1.8) 16-QFN (3x3) 16-QSOP 16-SO 16-SOEIAJ 16-SOIC 16-SOP 16-SSOP 16-TQFN (3x3) 16-TQFN (4x4) 16-TSSOP 16-TVSOP 16-UCSP (2x2) 16-UMLP (1.8x2.6) 16-UQFN (1.8x2.6) 16-UQFN (2.6x1.8) 16-VQFN (3x3) 16-VQFN (4x3.5) 16-VQFN (4x4) 16-X2QFN (1.6x1.6) 16-XFBGA (1.6x1.6) 16-XQFN (1.8x2.6) 18-PDIP 18-SOIC 20-BGA Microstar Junior (2.5x3.0) 20-HVQFN (5x5) 20-QFN (4x4) 20-QFN-UT (3x3) 20-SO 20-SSOP 20-TSSOP 20-TVSOP 20-VQFN (3.5x4.5) 24-BGA MICROSTAR JUNIOR (3x3) 24-DHVQFN (5.5x3.5) 24-DIP 24-HVQFN (4x4) 24-HWQFN (4x4) 24-LFCSP-WQ (4x4) 24-MFPSJ 24-PDIP 24-QFN 24-QFN (4x4) 24-QSOP 24-SBDIP 24-SO 24-SOIC 24-SOP 24-SSOP 24-TQFN (4x4) 24-TQFN-EP (3.5x3.5) 24-TQFN-EP (4x4) 24-TSSOP 24-TVSOP 24-UFBGA (2x2) 24-VFBGA (3x3) 24-VQFN (4x4) 24-WQFN (4x4) 24-X2QFN (2x2) 24-XFBGA (2x2) 25-DSBGA 25-FlipChip (2x2) 25-FOWLP (2x2) 25-TFBGA (3x3) 25-WLCSP (1.97x1.97) 28-PDIP 28-QFN (6x6) 28-QFN-UT (4x4) 28-SOIC 28-SPDIP 28-SSOP 28-TQFN (5x5) 28-TSSOP 32-HUQFN (5x5) 32-HVQFN (5x5) 32-TQFN (3x6) 32-TQFN (5x5) 32-UQFN (5x5) 36-FOWLP (2.6x2.6) 36-MFPSDJ 36-SSOP 36-TFBGA (3.5x3.5) 36-VFBGA (2.6x2.6) 40-Cerdip 40-PDIP 40-SQFN (6x6) 40-TQFN (6x6) 42-VFBGA (2.6x3) 44-MQFP (10x10) 44-PLCC (16.58x16.58) 48-SSOP 56-HVQFN (8x8) 56-TQFN (7x7) 56-TSSOP 8-DSBGA (1.9x0.9) 8-HVSON (3x3) 8-MSOP 8-MSOP-EP 8-SC70JW 8-SO 8-SOIC 8-TSSOP 8-UQFN (1.6x1.6) 8-VSSOP 8-X2SON (1.35x0.8) 8-XQFN (1.6x1.6) Die VBGA035W040 VQFN016V3030 W-QFN4565-46 (SWP) WLP-16A-C

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Mfr. Part #	Availability	Price	Quantity	Datasheet	Series	Package/Case	Packaging	Product Status	Programmable	Number of I/O	Interface	Interrupt Output	Features	Output Type	Current - Output Source/Sink	Clock Frequency	Voltage - Supply	Operating Temperature	Grade	Qualification	Mounting Type	Supplier Device Package
PCA9674PW,118 IC XPNDR 1MHZ I2C 16TSSOP NXP USA Inc.	4,125	-	RFQ	Datasheet	-	16-TSSOP (0.173", 4.40mm Width)	Tape & Reel (TR)	Active	Not Verified	8	I2C	Yes	POR	Push-Pull	100µA, 25mA	1 MHz	2.3V ~ 5.5V	-40°C ~ 85°C	-	-	Surface Mount	16-TSSOP
PCA9555PW,118 IC XPND 400KHZ I2C SMBUS 24TSSOP NXP USA Inc.	91,090	-	RFQ	Datasheet	-	24-TSSOP (0.173", 4.40mm Width)	Tape & Reel (TR)	Active	Not Verified	16	I2C, SMBus	Yes	POR	Push-Pull	10mA, 25mA	400 kHz	2.3V ~ 5.5V	-40°C ~ 85°C	-	-	Surface Mount	24-TSSOP
TCA6424ARGJR IC XPNDR 400KHZ I2C SMBUS 32UQFN Texas Instruments	2,823	-	RFQ	Datasheet	-	32-UFQFN Exposed Pad	Tape & Reel (TR)	Active	Not Verified	24	I2C, SMBus	Yes	POR	Push-Pull	10mA, 25mA	400 kHz	1.65V ~ 5.5V	-40°C ~ 85°C	-	-	Surface Mount	32-UQFN (5x5)
TCAL6416RTWR 16-BIT TRANSLATING IC-BUS/SMBUS Texas Instruments	2,068	-	RFQ	Datasheet	-	24-WFQFN Exposed Pad	Tape & Reel (TR)	Active	-	16	I2C	Yes	POR	Open Drain, Push-Pull	10mA, 25mA	100 kHz	1.08V ~ 3.6V	-40°C ~ 125°C	-	-	Surface Mount	24-WQFN (4x4)
PCAL9538APWJ IC XPND 400KHZ I2C SMBUS 16TSSOP NXP USA Inc.	4,602	-	RFQ	Datasheet	Agile	16-TSSOP (0.173", 4.40mm Width)	Tape & Reel (TR)	Active	Not Verified	8	I2C, SMBus	Yes	POR	Open Drain, Push-Pull	10mA, 25mA	400 kHz	1.65V ~ 5.5V	-40°C ~ 85°C	-	-	Surface Mount	16-TSSOP
PI4IOE5V6416ZDEX IC XPNDR 400KHZ I2C 24TQFN Diodes Incorporated	6,375	-	RFQ	Datasheet	-	24-VFQFN Exposed Pad	Tape & Reel (TR)	Active	Not Verified	16	I2C	Yes	POR	Open Drain, Push-Pull	10mA, 25mA	400 kHz	1.65V ~ 5.5V	-40°C ~ 85°C	-	-	Surface Mount	24-TQFN (4x4)
PCA9535APW,118 IC XPND 400KHZ I2C SMBUS 24TSSOP NXP USA Inc.	5,118	-	RFQ	Datasheet	-	24-TSSOP (0.173", 4.40mm Width)	Tape & Reel (TR)	Active	Not Verified	16	I2C, SMBus	Yes	POR	Push-Pull	10mA, 25mA	400 kHz	1.65V ~ 5.5V	-40°C ~ 85°C	-	-	Surface Mount	24-TSSOP
PCA9701PW,118 IC XPNDR 5MHZ SPI SERIAL 24TSSOP NXP USA Inc.	4,327	-	RFQ	Datasheet	-	24-TSSOP (0.173", 4.40mm Width)	Tape & Reel (TR)	Active	Not Verified	16 (Input Only)	SPI Serial	Yes	-	Push-Pull	-	5 MHz	2.5V ~ 5.5V	-40°C ~ 125°C	-	-	Surface Mount	24-TSSOP
PCA9555APW,118 IC XPND 400KHZ I2C SMBUS 24TSSOP NXP USA Inc.	2,078	-	RFQ	Datasheet	-	24-TSSOP (0.173", 4.40mm Width)	Tape & Reel (TR)	Active	Not Verified	16	I2C, SMBus	Yes	POR	Push-Pull	10mA, 25mA	400 kHz	1.65V ~ 5.5V	-40°C ~ 85°C	-	-	Surface Mount	24-TSSOP
PCAL9555APW,118 IC XPND 400KHZ I2C SMBUS 24TSSOP NXP USA Inc.	1,012	-	RFQ	Datasheet	Agile	24-TSSOP (0.173", 4.40mm Width)	Tape & Reel (TR)	Active	Not Verified	16	I2C, SMBus	Yes	POR	Open Drain, Push-Pull	10mA, 25mA	400 kHz	1.65V ~ 5.5V	-40°C ~ 85°C	-	-	Surface Mount	24-TSSOP
MCP23S17T-E/ML IC XPNDR 10MHZ SPI 28QFN Microchip Technology	34,710	-	RFQ	Datasheet	-	28-VQFN Exposed Pad	Tape & Reel (TR)	Active	Not Verified	16	SPI	Yes	POR	Push-Pull	25mA	10 MHz	1.8V ~ 5.5V	-40°C ~ 125°C	-	-	Surface Mount	28-QFN (6x6)
MCP23018T-E/MJ IC XPNDR 3.4MHZ I2C 24QFN Microchip Technology	6,076	-	RFQ	Datasheet	-	24-VFQFN Exposed Pad	Tape & Reel (TR)	Active	Not Verified	16	I2C	Yes	POR	Open Drain	25mA	3.4 MHz	1.8V ~ 5.5V	-40°C ~ 125°C	-	-	Surface Mount	24-QFN (4x4)
MCP23018-E/MJ IC XPNDR 3.4MHZ I2C 24QFN Microchip Technology	1,846	-	RFQ	Datasheet	-	24-VFQFN Exposed Pad	Tube	Active	Not Verified	16	I2C	Yes	POR	Open Drain	25mA	3.4 MHz	1.8V ~ 5.5V	-40°C ~ 125°C	-	-	Surface Mount	24-QFN (4x4)
TCA9539QPWRQ1 IC XPND 400KHZ I2C SMBUS 24TSSOP Texas Instruments	3,472	-	RFQ	Datasheet	-	24-TSSOP (0.173", 4.40mm Width)	Tape & Reel (TR)	Active	Not Verified	16	I2C, SMBus	Yes	POR	Push-Pull	10mA, 25mA	400 kHz	1.65V ~ 3.6V	-40°C ~ 125°C	Automotive	AEC-Q100	Surface Mount	24-TSSOP
PCA9539AHF,128 IC XPND 400KHZ I2C SMBUS 24HWQFN NXP USA Inc.	20,005	-	RFQ	Datasheet	-	24-WFQFN Exposed Pad	Tape & Reel (TR)	Active	Not Verified	16	I2C, SMBus	Yes	POR	Push-Pull	10mA, 25mA	400 kHz	1.65V ~ 5.5V	-40°C ~ 85°C	-	-	Surface Mount	24-HWQFN (4x4)
TCAL9539RTWRQ1 AUTOMOTIVE 16-BIT LOW VOLTAGE IC Texas Instruments	7,329	-	RFQ	Datasheet	-	24-WFQFN Exposed Pad	Tape & Reel (TR)	Active	-	16	I2C, SMBus	Yes	POR	Open Drain, Push-Pull	10mA, 25mA	1 MHz	1.08V ~ 3.6V	-40°C ~ 125°C	-	-	Surface Mount	24-WQFN (4x4)
PCAL9555AHF,128 IC XPNDR 400KHZ I2C 24HWQFN NXP USA Inc.	2,208	-	RFQ	Datasheet	Agile	24-WFQFN Exposed Pad	Tape & Reel (TR)	Active	Not Verified	16	I2C	Yes	POR	Open Drain, Push-Pull	10mA, 25mA	400 kHz	1.65V ~ 5.5V	-40°C ~ 85°C	-	-	Surface Mount	24-HWQFN (4x4)
MCP23016-I/SO IC XPNDR 400KHZ I2C 28SOIC Microchip Technology	830	-	RFQ	Datasheet	-	28-SOIC (0.295", 7.50mm Width)	Tube	Active	Not Verified	16	I2C	Yes	POR	Push-Pull	25mA	400 kHz	2V ~ 5.5V	-40°C ~ 85°C	-	-	Surface Mount	28-SOIC
PCA9555AHF,128 IC XPND 400KHZ I2C SMBUS 24HWQFN NXP USA Inc.	42,324	-	RFQ	Datasheet	-	24-WFQFN Exposed Pad	Tape & Reel (TR)	Active	Not Verified	16	I2C, SMBus	Yes	POR	Push-Pull	10mA, 25mA	400 kHz	1.65V ~ 5.5V	-40°C ~ 85°C	-	-	Surface Mount	24-HWQFN (4x4)
MCP23S18-E/MJ IC XPNDR 10MHZ SPI 24QFN Microchip Technology	8,985	-	RFQ	Datasheet	-	24-VFQFN Exposed Pad	Tube	Active	Not Verified	16	SPI	Yes	-	Open Drain	25mA	10 MHz	1.8V ~ 5.5V	-40°C ~ 125°C	-	-	Surface Mount	24-QFN (4x4)

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Category Overview

I/O Expanders Products & Selection Guide

I/O Expanders are widely used in industrial automation, automotive electronics, communication equipment, consumer electronics, new energy systems, and many other electronic applications. We offer products from multiple manufacturers, packages, and specifications to help engineers and buyers compare and source suitable components.

Use the manufacturer, key specification, availability, and Datasheet filters to narrow down the right I/O Expanders. If the exact part is not listed, submit an inquiry and our team can help check stock, lead time, and suitable alternatives.

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Start with the required electrical specifications, package, operating temperature, application conditions, and manufacturer preference, then compare availability and lead time.

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