Overview
The PCA9554PWRG4, produced by Texas Instruments, is an 8-bit I2C/SMBus I/O expander designed to enhance the I/O capabilities of microcontrollers. This device features an open-drain active-low interrupt output, allowing it to inform the microcontroller of changes in input states without continuous communication via the I2C bus. It operates within a 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 PCA9554PWRG4 is packaged in a 16-TSSOP and is RoHS compliant, making it suitable for a variety of applications requiring expanded I/O functionality.
Key Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Part Number | PCA9554PWRG4 |
| Package Type | 16-TSSOP |
| Operating Temperature Range | -40°C to 85°C |
| Supply Voltage Range | 2.3 V to 5.5 V |
| Maximum Clock Frequency | 400 kHz |
| Number of I/Os | 8 |
| I2C Address | 0100 xxx (configurable with A0, A1, A2 pins) |
| Interrupt Output | Open-drain active-low |
| ESD Protection | 2000-V Human-Body Model, 200-V Machine Model, 1000-V Charged-Device Model |
Key Features
- I2C to Parallel Port Expander
- 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 (A0, A1, A2) allowing up to eight devices on the I2C/SMBus
- Input/Output configuration register and polarity inversion register
- Internal power-on reset and power-up with all channels configured as inputs
- 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 PCA9554PWRG4 is suitable for various applications requiring expanded I/O capabilities, such as:
- Industrial control systems
- Consumer electronics
- Automotive systems
- Medical devices
- Any system needing to expand the I/O ports of a microcontroller
Q & A
- What is the operating voltage range of the PCA9554PWRG4?
The operating voltage range is 2.3 V to 5.5 V.
- What is the maximum clock frequency of the I2C bus for the PCA9554PWRG4?
The maximum clock frequency is 400 kHz.
- How many I/Os does the PCA9554PWRG4 provide?
The device provides 8 I/Os.
- What is the purpose of the interrupt output on the PCA9554PWRG4?
The interrupt output informs the microcontroller of changes in input states without continuous I2C communication.
- Can multiple PCA9554PWRG4 devices share the same I2C bus?
- What is the package type of the PCA9554PWRG4?
The device is packaged in a 16-TSSOP.
- Is the PCA9554PWRG4 RoHS compliant?
- What is the operating temperature range of the PCA9554PWRG4?
- Does the PCA9554PWRG4 have internal power-on reset?
- Can the PCA9554PWRG4 drive LEDs directly?
