Overview
The PCA9554PWG4 is a remote 8-bit I2C and SMBus I/O expander produced by Texas Instruments. This component is designed to provide additional I/O ports to a microcontroller or other I2C/SMBus master device, enhancing the overall I/O capability of the system. It operates within a wide power-supply voltage range of 2.3 V to 5.5 V and supports a fast I2C bus frequency of up to 400 kHz. The device features an open-drain active-low interrupt output and includes internal power-on reset, ensuring that all channels are configured as inputs upon power-up without any glitches.
Key Specifications
| Specification | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Part Number | PCA9554PWG4 |
| Package Type | 16-TSSOP |
| Operating Temperature | -40°C to 85°C |
| Supply Voltage | 2.3 V to 5.5 V |
| I2C Bus Frequency | Up to 400 kHz |
| Number of I/O | 8 |
| Output Type | Open Drain |
| Interrupt Output | Yes, open-drain active-low |
| ESD Protection | Exceeds JESD 22 (2000-V Human-Body Model, 200-V Machine Model, 1000-V Charged-Device Model) |
Key Features
- I2C to parallel port expander with 8-bit I/O ports
- Open-drain active-low interrupt output
- Operating power-supply voltage range of 2.3 V to 5.5 V
- 5-V tolerant I/Os
- 400-kHz fast I2C bus
- Three hardware address pins allowing up to eight devices on the I2C/SMBus
- Input/output configuration register and polarity inversion register
- Internal power-on reset (POR) with all channels configured as inputs on power-up
- No glitch on power-up
- Latched outputs with high-current drive capability for directly driving LEDs
- Latch-up performance exceeds 100 mA per JESD 78, Class II
Applications
The PCA9554PWG4 is suitable for various applications where additional I/O ports are required, such as in industrial control systems, medical devices, consumer electronics, and automotive systems. It is particularly useful in scenarios where the main microcontroller or system processor lacks sufficient I/O ports to handle all the necessary inputs and outputs.
Q & A
- What is the PCA9554PWG4?
The PCA9554PWG4 is a remote 8-bit I2C and SMBus I/O expander produced by Texas Instruments. - What is the operating voltage range of the PCA9554PWG4?
The operating voltage range is 2.3 V to 5.5 V. - What is the maximum I2C bus frequency supported by the PCA9554PWG4?
The maximum I2C bus frequency is up to 400 kHz. - How many I/O ports does the PCA9554PWG4 provide?
The PCA9554PWG4 provides 8 I/O ports. - Does the PCA9554PWG4 have an interrupt output?
Yes, it has an open-drain active-low interrupt output. - What is the package type of the PCA9554PWG4?
The package type is 16-TSSOP. - What are the key features of the PCA9554PWG4?
Key features include I2C to parallel port expander, 5-V tolerant I/Os, internal power-on reset, and high-current drive capability for directly driving LEDs. - What are some common applications of the PCA9554PWG4?
Common applications include industrial control systems, medical devices, consumer electronics, and automotive systems. - Does the PCA9554PWG4 have ESD protection?
Yes, it exceeds JESD 22 standards for ESD protection. - How many devices can be connected on the I2C/SMBus using the PCA9554PWG4?
Up to eight devices can be connected using the three hardware address pins.
