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	Voltage - Supply	Operating Temperature	Mounting Type	Package / Case	Supplier Device Package
	MAX7317ATE+T IC I/O EXPANDER SPI 10B 16TQFN Analog Devices Inc./Maxim Integrated	1,969 In Stock	1 : $48.90000 Cut Tape (CT) 2,500 : $27.57298 Tape & Reel (TR)	-	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Not Verified	10	SPI	No	-	Open Drain	20mA	2.25V ~ 3.6V	-40°C ~ 125°C	Surface Mount	16-WFQFN Exposed Pad	16-TQFN (3x3)
	MAX7317ATE+ IC I/O EXPANDER SPI 10B 16TQFN Analog Devices Inc./Maxim Integrated	1,156 In Stock 300 Factory	1 : $49.97000 Tube	-	Tube	Active	Not Verified	10	SPI	No	-	Open Drain	20mA	2.25V ~ 3.6V	-40°C ~ 125°C	Surface Mount	16-WFQFN Exposed Pad	16-TQFN (3x3)

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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.