NXP’s industry-leading General Purpose I/O (GPIO) expanders provide 4, 8, 16, 24, or 40 general purpose I/O pins for the CPU via the I2C bus to help designers reduce board space and complexity and simplify software development time for lower overall system cost.

Robust Performance from the I2C Inventors – Rock solid performance and specification conformance eliminates miscommunication and system hang up issues

Broadest Portfolio – Complete line of industry-standard and special-function devices simplifies procurement and minimizes qualification costs with a single supplier

Differentiated Devices – Help your systems stand out in the market

  • Lowest I2C bus power supply voltage down to 0.8V eliminates level translation
  • Smallest, thinnest packages available save space – 2 x 2 x 0.35 mm 24-pin Land Grid Array
  • Agile I/O GPIO includes features to eliminate external components like pull up resistors, open drain outputs, output drive control and input latches to permit faster software development and more robust firmware performance

Recommended Products

Part Number Description No of Bits VDD (V) Datasheet Order
PCAL6524 Ultra-low-voltage Fm+ I2C bus, SMBus I/O expander 24 0.8 to 5.5 PDF
(2.3 MB)
PCAL6416A Low-voltage translating Fm I2C bus, SMBus I/O expander 16 1.65 to 5.5 PDF
(3.1 MB)
PCAL6408A Low-voltage Fm I2C bus, SMBus I/O expander 8 1.65 to 5.5 PDF
(2.7 MB)
PCA9570 Remote 1 MHz I2C GPIO 4 1.1 to 3.6 PDF
(1.7 MB)
PCA9555A Low-voltage Fm I2C-bus I/O port with interrupt and weak pull-up 16 1.65 to 5.5 PDF
(2.4 MB)
PCA9698 Fm+ I2C bus advanced I/O port with RESET, OE and INT 40 2.3 to 5.5 PDF
(362 KB)

See entire I2C General Purpose I/O portfolio.