1.65 V GPIO Expanders with Agile I/O

Low voltage 8- and 16-bit GPIO devices from NXP Semiconductors

NXP's 1.65 V GPIO Expanders with Agile I/OThe NXP Semiconductors family of low voltage GPIO with Agile I/O expands the two wires of the I²C-bus into 8 or 16 general purpose I/O pins that can interface to keyboards, switches, LEDs, displays or even stepping motors – saving valuable pins on the microprocessor or custom ASIC. The family has eight members with Agile I/O and eight members without. The devices that do not implement Agile I/O are 100% compatible with industry-standard devices, giving users supply alternatives and the advantage of second sources.

The members of the low voltage GPIO family are differentiated by the number of I/O pins: 8 or 16. Other differences come from implementing features like reset and interrupt. To aid in printed-circuit board layout, the device pinout is very similar between devices allowing the designer to simply select the family and delay feature selection until later in the process.

Low voltage operation from 1.65 V to 5.5 V and low current consumption make these devices ideal for a wide range of applications - from portable to industrial to automotive. Dual power supply components allow for bidirectional level translation in today’s systems that must interface with the harsh outside world.

Unique Features of Agile I/O Versions
  • Backward-compatible with industry-standard versions
  • New registers to control configurable features
  • Input latch locks in any changes on input pins until the input port register is read
  • Programmable pull-up or pull-down resistors
  • Output drive strength selectable to ¼, ½, ¾ or max to conserve battery power and reduce power-supply noise when simultaneous outputs switch
  • Interrupt mask to limit interrupt sources
  • Interrupt status register shows interrupt source
  • Output selection of open-drain or push-pull configuration
1.65 V GPIO Expanders with Agile IO
ImageManufacturer Part NumberDescriptionAvailable QuantityBuy Now
IC I/O EXPANDER I2C 8B 16TSSOPPCA9554PW,118IC I/O EXPANDER I2C 8B 16TSSOP3729 - Immediate
IC I/O EXPANDER I2C 16B 24TSSOPPCA9555PW,118IC I/O EXPANDER I2C 16B 24TSSOP19578 - Immediate
IC I/O EXPANDER I2C 16B 24SSOPPCA9555DB,118IC I/O EXPANDER I2C 16B 24SSOP3611 - Immediate
IC I/O EXPANDER I2C 8B 16TSSOPPCA9554APW,112IC I/O EXPANDER I2C 8B 16TSSOP4175 - Immediate
IC I/O EXPANDER I2C 8B 16SOICPCA9554D,112IC I/O EXPANDER I2C 8B 16SOIC2207 - Immediate
IC I/O EXPANDER I2C 16B 24SOICPCA9555D,112IC I/O EXPANDER I2C 16B 24SOIC1621 - Immediate
IC I/O EXPANDER I2C 8B 16SSOPPCA9554DB,112IC I/O EXPANDER I2C 8B 16SSOP1882 - Immediate
IC I/O EXPANDER I2C 8B 16SOICPCA9554AD,112IC I/O EXPANDER I2C 8B 16SOIC980 - Immediate
IC I2C BUS/SMBUS 16BIT 24HVQFNPCA9539BSHPIC I2C BUS/SMBUS 16BIT 24HVQFN489 - Immediate
KIT EVAL BOARD I2C-BUS FM+OM13320,598KIT EVAL BOARD I2C-BUS FM+0
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Published: 2012-12-18