Mobile I/O Expander & Keypad Controller

Analog Devices' family of mobile I/O expanders are ideal for smartphone designs and portable devices that require a large extended keypad and/or expanded I/Os such as inventory scanners, medical equipment, and meter readers. Microprocessors in portable systems are GPIO constrained due to the number of functions they must interface with and control. They are also power hungry, making them inefficient for debouncing, polling, and key press scanning algorithms. ADI’s family of mobile I/O expanders offloads key scan and GPIO functions from the CPU, freeing up the processor for higher priority functions while saving energy.
Product Selection Table

Mobile I/O Expander-Keypad Controller

Mobile I/O Expander-Keypad Controller

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I/O Expanders

Part#QWERTY SupportFIFO EventsI2C SupportedGPIO pinsSpecial FeaturesIsupply (typ)Vsupply Positive (min)Vsupply Positive (max)US Price 1000 to 4999
ADP5586 no 16 Yes 10- 75 µA 1.65 3.6 $0.75
ADP5585 no 16 Yes 11 PWM Units 75 µA 1.65 3.6 $0.75
ADP5589 no 16 Yes 19 PWM Units - 1.8 3.3 $0.99
ADP5587 yes 18 Yes 18- 100 µA 1.65 3.6 $0.99
ADP5588 yes 18 Yes 18- 100 µA 1.7 3 $0.99