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.
Featured 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)
Buy
PCAL6416A Low-voltage translating Fm I2C Bus, SMBus I/O expander 16 1.65 to 5.5 PDF
(3.1 MB)
Buy
PCAL6408A Low-voltage Fm I2C Bus, SMBus I/O expander 8 1.65 to 5.5 PDF
(2.7 MB)
Buy
PCA9570 Remote 1 MHz I2C GPIO 4 1.1 to 3.6 PDF
(1.7 MB)
Buy
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)
Buy
PCA9698 Fm+ I2C Bus advanced I/O port with RESET, OE and INT 40 2.3 to 5.5 PDF
(362 KB)
Buy
Catalog of System Management and I2C 2016

Catalog of System Management and I2C 2016

A broad catalog of interface components for all your design needs.

Catalog of System Management and I2C 2016

System management I2C 2016 selector guide

Selector Guide of interface components for all your design needs.

24-bit GPIO with GUI interface

Emmanuel Nana talk us about the usage of the PCALxxxx device to expand GPIO count (03:44).

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