I/O Expanders

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Mfr Part #	Quantity Available	Price	Series	Package	Product Status	DigiKey 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	Package / Case	Supplier Device Package

TCA9535RTWR IC XPNDR 400KHZ I2C SMBUS 24WQFN Texas Instruments	10,309 In Stock	1 : ¥10.37000 Cut Tape (CT) 3,000 : ¥4.41139 Tape & Reel (TR)	-	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	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-WFQFN Exposed Pad	24-WQFN (4x4)
TCA9539PWR IC XPND 400KHZ I2C SMBUS 24TSSOP Texas Instruments	8,974 In Stock	1 : ¥11.65000 Cut Tape (CT) 2,000 : ¥4.95233 Tape & Reel (TR)	-	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	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 (0.173", 4.40mm Width)	24-TSSOP
PCAL6416AHF,128 IC XPND 400KHZ I2C SMBUS 24HWQFN NXP USA Inc.	158,301 In Stock	1 : ¥13.69000 Cut Tape (CT) 6,000 : ¥5.52574 Tape & Reel (TR)	Agile	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	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-WFQFN Exposed Pad	24-HWQFN (4x4)
TCA9539RTWR IC XPNDR 400KHZ I2C SMBUS 24WQFN Texas Instruments	14,352 In Stock	1 : ¥15.64000 Cut Tape (CT) 3,000 : ¥7.14498 Tape & Reel (TR)	-	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	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-WFQFN Exposed Pad	24-WQFN (4x4)
TCA6424ARGJR IC XPNDR 400KHZ I2C SMBUS 32UQFN Texas Instruments	13,131 In Stock	1 : ¥18.11000 Cut Tape (CT) 3,000 : ¥8.28749 Tape & Reel (TR)	-	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	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-UFQFN Exposed Pad	32-UQFN (5x5)
PCA9539AHF,128 IC XPND 400KHZ I2C SMBUS 24HWQFN NXP USA Inc.	17,774 In Stock	1 : ¥20.23000 Cut Tape (CT) 6,000 : ¥8.91589 Tape & Reel (TR)	-	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	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-WFQFN Exposed Pad	24-HWQFN (4x4)
PI4IOE5V9535LEX IC XPNDR 400KHZ I2C 24TSSOP Diodes Incorporated	11,887 In Stock 24,000 Factory	1 : ¥12.92000 Cut Tape (CT) 3,000 : ¥5.46918 Tape & Reel (TR)	-	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Not Verified	16	I2C	Yes	-	-	-	400 kHz	2.3V ~ 5.5V	-40°C ~ 85°C	-	-	Surface Mount	24-TSSOP (0.173", 4.40mm Width)	24-TSSOP
PI4IOE5V9555ZDEX IC XPNDR 400KHZ I2C 24TQFN Diodes Incorporated	7,000 In Stock	1 : ¥13.18000 Cut Tape (CT) 3,500 : ¥6.02726 Tape & Reel (TR)	-	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Not Verified	16	I2C	Yes	-	-	-	400 kHz	2.3V ~ 5.5V	-40°C ~ 85°C	-	-	Surface Mount	24-VFQFN Exposed Pad	24-TQFN (4x4)
PI4IOE5V96224ZLEX IC XPNDR 1MHZ I2C SMBUS 32TQFN Diodes Incorporated	8,743 In Stock 10,500 Factory	1 : ¥17.77000 Cut Tape (CT) 3,500 : ¥8.11363 Tape & Reel (TR)	-	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Not Verified	24	I2C, SMBus	Yes	POR	Push-Pull	25mA	1 MHz	2.3V ~ 5.5V	-40°C ~ 85°C	-	-	Surface Mount	32-WFQFN Exposed Pad	32-TQFN (3x6)
XRA1201PIL24-F IC XPNDR 400KHZ I2C SMBUS 24QFN MaxLinear, Inc.	392 In Stock	1 : ¥13.26000 Tray	-	Tray	Not For New Designs	Not Verified	16	I2C, SMBus	Yes	-	Push-Pull	-	400 kHz	1.65V ~ 3.6V	-40°C ~ 85°C	-	-	Surface Mount	24-VFQFN Exposed Pad	24-QFN (4x4)
PI4IOE5V9537UEX IC XPNDR 1MHZ I2C 10MSOP Diodes Incorporated	2,488 In Stock 160,000 Factory	1 : ¥8.50000 Cut Tape (CT) 2,500 : ¥3.60605 Tape & Reel (TR)	-	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Not Verified	-	I2C	Yes	-	Push-Pull	-	1 MHz	2.3V ~ 5.5V	-	-	-	Surface Mount	10-TFSOP, 10-MSOP (0.118", 3.00mm Width)	10-MSOP
PI4IOE5V9554LEX IC XPNDR 400KHZ I2C 16TSSOP Diodes Incorporated	1,897 In Stock 2,500 Factory	1 : ¥11.05000 Cut Tape (CT) 2,500 : ¥4.14416 Tape & Reel (TR)	-	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Not Verified	8	I2C	Yes	-	-	-	400 kHz	2.3V ~ 5.5V	-40°C ~ 85°C	-	-	Surface Mount	16-TSSOP (0.173", 4.40mm Width)	16-TSSOP
PI4IOE5V9555LEX IC XPNDR 400KHZ I2C 24TSSOP Diodes Incorporated	2,554 In Stock	1 : ¥13.01000 Cut Tape (CT) 3,000 : ¥4.88798 Tape & Reel (TR)	-	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Not Verified	16	I2C	Yes	-	-	-	400 kHz	2.3V ~ 5.5V	-40°C ~ 85°C	-	-	Surface Mount	24-TSSOP (0.173", 4.40mm Width)	24-TSSOP

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I/O Expanders

Devices in this family are used in conjunction with microcontrollers, microprocessors, or similar devices for the purpose of increasing the number of signal connections available for connecting peripheral devices. The typical concept of operation involves the use of serial communications requiring only a few I/O lines on the host device to read/write the status of many input/output pins on the expander device. The technique exchanges speed of communication for increased connectivity, and is best suited for applications where fast response is not critical, such as in many human interface applications.