Description

The PCA9555PW is a 24-pin CMOS device that provides 16 bits of General Purpose parallel Input/Output (GPIO) expansion for I2C/SMBus applications. It is developed to enhance the Philips family of IC I/O expanders. The PCA9555PW offers several improvements compared to its predecessors, including higher drive capability, 5 V I/O tolerance, lower supply current, individual I/O configuration, and smaller packaging. This makes it an ideal solution for adding additional I/O to ACPI power switches, sensors, pushbuttons, LEDs, fans, and more.

Specifications and features

• Operating power supply voltage range of 2.3 V to 5.5 V
• 5 V tolerant I/Os
• Polarity inversion register
• Active-LOW interrupt output
• Low stand-by current
• Noise filter on SCL/SDA inputs
• No glitch on power-up
• Internal power-on reset
• 16 I/O pins which default to 16 inputs
• 0 kHz to 400 kHz clock frequency
• ESD protection exceeds 2000 V HBM per JESD22-A114, 200 V MM per JESD22-A115, and 1000 V CDM per JESD22-C101
• Latch-up testing is done to JESDEC Standard JESD78 which exceeds 100 mA
• Five packages offered: DIP24, SO24, SSOP24, TSSOP24, and HVQFN24

Application Scenarios

The PCA9555PW is suitable for various application scenarios, including ACPI power switches, sensors, pushbuttons, LEDs, fans, and other devices that require additional I/O expansion. It can be easily integrated into I2C/SMBus systems and offers flexibility in I/O configuration.

Comparison

- Higher drive capability

- 5 V I/O tolerance

- Lower supply current

- Individual I/O configuration

- Smaller packaging

- None