Overview
The PCA9536DGKR, produced by Texas Instruments, is a remote 4-bit I2C and SMBus I/O expander designed for general-purpose remote I/O expansion. This device operates within a voltage range of 1.65-V to 5.5-V VCC, making it versatile for various microcontroller families. It features configuration, input port, output port, and polarity inversion registers, allowing for flexible I/O configuration and control through the I2C interface.
Key Specifications
| Specification | Value |
|---|---|
| VCC Operating Voltage | 1.65-V to 5.5-V |
| I2C/SMBus Frequency | 100 kHz / 400 kHz |
| Package Type | 8-pin VSSOP |
| Standby Current Consumption | 1 μA Max |
| I/O Configuration | Input or Output selection |
| Polarity Inversion | Active-high or active-low operation |
| Input Pullup Resistors | 100 kΩ typical |
Key Features
- Low standby current consumption of 1 μA Max, reducing power consumption in idle states.
- Flexible I/O configuration allowing each I/O to be set as either an input or an output.
- Polarity inversion capability for input ports, enabling active-high or active-low operation.
- Internal pullup resistors (100 kΩ typical) on input ports to ensure high-impedance inputs with a weak pullup to VCC.
- Support for I2C and SMBus interfaces with frequencies up to 400 kHz.
- Available in the Texas Instruments NanoFree™ package, enhancing reliability and reducing size.
Applications
- General-purpose remote I/O expansion for most microcontroller families.
- Industrial control systems requiring additional I/O ports.
- Automotive and aerospace applications where low power consumption and reliability are critical.
- Consumer electronics needing flexible and compact I/O solutions.
- Embedded systems and IoT devices requiring efficient I/O management.
Q & A
- What is the operating voltage range of the PCA9536DGKR?
The PCA9536DGKR operates within a voltage range of 1.65-V to 5.5-V VCC.
- What is the maximum standby current consumption of the PCA9536DGKR?
The maximum standby current consumption is 1 μA.
- Can the I/O ports of the PCA9536DGKR be configured as either inputs or outputs?
- What is the purpose of the polarity inversion register in the PCA9536DGKR?
The polarity inversion register allows the polarity of the input port to be inverted, enabling active-high or active-low operation.
- What is the typical value of the internal pullup resistors on the input ports?
The typical value of the internal pullup resistors is 100 kΩ.
- What are the supported I2C/SMBus frequencies for the PCA9536DGKR?
The PCA9536DGKR supports I2C/SMBus frequencies up to 400 kHz.
- In what package type is the PCA9536DGKR available?
The PCA9536DGKR is available in an 8-pin VSSOP package.
- What happens to the I/O ports at power-on?
At power-on, the I/O ports are configured as inputs with a weak pullup to VCC.
- How does the system controller reset the PCA9536DGKR in case of improper operation?
The system controller can reset the PCA9536DGKR in the event of a timeout or other improper operation by initializing the registers and I2C/SMBus state machine to their default states.
- What are some common applications of the PCA9536DGKR?
Common applications include general-purpose remote I/O expansion, industrial control systems, automotive and aerospace applications, consumer electronics, and embedded systems.
