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

  Hold Shift Key for secondary sorting
SortOrderPart#QWERTY SupportFIFO EventsInterfaceGPIO pinsIs
(typ)
(A)
Vs+
(min)
(V)
Vs+
(max)
(V)
Price (1000+)
($ US)
1ADP5586 No 16 I2C 10 75μ 1.65 3.6 $0.75 (ADP5586ACBZ-00-R7)
2ADP5585 No 16 I2C, PWM 11 75μ 1.65 3.6 $0.75 (ADP5585ACBZ-00-R7)
3ADP5589 No 16 I2C, PWM 19 30μ 1.8 3.3 $0.99 (ADP5589ACBZ-00-R7)
4ADP5587 Yes 18 I2C 18 100μ 1.65 3.6 $0.99 (ADP5587ACBZ-R7)
5ADP5588 Yes 18 I2C 18 100μ 1.7 3 $1.02 (ADP5588ACPZ-R7)
6ADP5520-- I2C 8 25μ 2.27 5.5 $1.71 (ADP5520ACPZ-R7)