Overview
The PCA9554APWRG4 is a remote 8-bit I2C and SMBus I/O expander produced by Texas Instruments. This component is part of the PCA9554A series, which allows for the expansion of the I2C bus, enabling more devices to be connected to the same bus. The PCA9554APWRG4 is particularly useful in applications where additional I/O ports are required without increasing the complexity of the main microcontroller.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (VCC) | 2.3 to 5.5 | V |
| Operating Temperature (TA) | -40 to 85 | °C |
| I2C Clock Frequency (fSCL) | Up to 400 | kHz |
| Input Voltage (VI) | -0.5 to VCC + 0.5 | V |
| Output Current (IO) per I/O | Up to 25 | mA |
| Total Output Current (IO) for all I/Os | Up to 85 | mA |
| Package Type | TSSOP-16 | |
| Package Dimensions | 4.90 mm x 3.90 mm |
Key Features
- I2C and SMBus compatible with clock frequencies up to 400 kHz.
- 8-bit remote I/O expander with individual direction control for each I/O.
- Active-low interrupt output that can be connected to the interrupt input of a microcontroller.
- Supports hot insertion and low standby current.
- 5.5 V tolerant inputs.
- Allows up to 16 devices (8 of each PCA9554 and PCA9554A) on the same I2C/SMBus, thanks to fixed I2C addresses.
Applications
- Industrial automation and control systems where additional I/O ports are needed.
- Consumer electronics requiring expansion of the I2C bus.
- Medical devices that need to interface with multiple sensors or actuators.
- Aerospace and defense systems requiring reliable and expandable I/O capabilities.
- Automotive systems that need to manage multiple inputs and outputs efficiently.
Q & A
- What is the PCA9554APWRG4 used for?
The PCA9554APWRG4 is used as an 8-bit I2C and SMBus I/O expander, allowing the expansion of the I2C bus to connect more devices.
- What is the operating voltage range of the PCA9554APWRG4?
The operating voltage range is from 2.3 V to 5.5 V.
- What is the maximum I2C clock frequency supported by the PCA9554APWRG4?
The maximum I2C clock frequency supported is up to 400 kHz.
- How many devices of this type can be connected on the same I2C/SMBus?
Up to 16 devices (8 of each PCA9554 and PCA9554A) can be connected on the same I2C/SMBus.
- What is the package type and dimensions of the PCA9554APWRG4?
The package type is TSSOP-16, and the dimensions are 4.90 mm x 3.90 mm.
- Is the PCA9554APWRG4 tolerant to higher input voltages?
- Can the PCA9554APWRG4 be used in hot insertion applications?
- What is the maximum output current per I/O and for all I/Os combined?
The maximum output current per I/O is up to 25 mA, and for all I/Os combined, it is up to 85 mA.
- What are some common applications of the PCA9554APWRG4?
Common applications include industrial automation, consumer electronics, medical devices, aerospace and defense systems, and automotive systems.
- Does the PCA9554APWRG4 have an interrupt output?
