Overview
The PCA9555D,112 is a 16-bit CMOS I²C-bus and SMBus I/O Port with interrupt, developed by NXP USA Inc. This device provides 16 bits of General Purpose parallel Input/Output (GPIO) expansion for I²C-bus/SMBus applications. It is designed to enhance the NXP Semiconductors family of I²C-bus I/O expanders with improvements such as higher drive capability, 5 V I/O tolerance, lower supply current, individual I/O configuration, and smaller packaging.
Key Specifications
| Specification | Value |
|---|---|
| Interface Type | I²C/SMBus |
| Clock Frequency (Max) | 400 kHz |
| Number of I/O Lines | 16 |
| Supply Voltage (Nominal) | 2.3 V to 5.5 V |
| Supply Current | 160 mA |
| Package Style | SOIC-24 |
| Mounting Method | Surface Mount |
| Package Quantity | 30 per Tube |
Key Features
- Higher drive capability and 5 V I/O tolerance
- Lower supply current and individual I/O configuration
- Smaller packaging options (SO24, SSOP24, TSSOP24, HVQFN24, HWQFN24)
- Polarity Inversion register for active HIGH or active LOW operation
- Active LOW interrupt output for indicating input state changes
- Low standby current and internal power-on reset
- No glitch on power-up and noise filter on SCL/SDA inputs
- ESD protection exceeding 2000 V HBM, 200 V MM, and 1000 V CDM
Applications
The PCA9555D,112 is suitable for various applications where additional I/O is required, such as:
- ACPI power switches
- Sensors
- Push buttons
- LEDs
- Fans
- Other general-purpose I/O expansion needs in I²C-bus/SMBus systems
Q & A
- What is the PCA9555D,112?
The PCA9555D,112 is a 16-bit CMOS I²C-bus and SMBus I/O Port with interrupt, providing GPIO expansion for I²C-bus/SMBus applications.
- What is the interface type of the PCA9555D,112?
The interface type is I²C/SMBus.
- What is the maximum clock frequency of the PCA9555D,112?
The maximum clock frequency is 400 kHz.
- How many I/O lines does the PCA9555D,112 have?
The device has 16 I/O lines.
- What is the supply voltage range of the PCA9555D,112?
The supply voltage range is from 2.3 V to 5.5 V.
- What is the package style of the PCA9555D,112?
The package style is SOIC-24.
- How many devices can share the same I²C-bus/SMBus?
Up to eight devices can share the same I²C-bus/SMBus.
- What triggers the interrupt output on the PCA9555D,112?
The interrupt output is triggered when any input state differs from its corresponding input port register state.
- Does the PCA9555D,112 have ESD protection?
- What are some common applications of the PCA9555D,112?
- Is the PCA9555D,112 compatible with other NXP I/O expanders?
