Overview
The PCA9536DR is a remote 4-bit I2C and SMBus I/O expander produced by Texas Instruments. This device is designed to provide general-purpose remote I/O expansion for most microcontroller families through the I2C interface. It operates within a voltage range of 1.65-V to 5.5-V VCC, making it versatile for various applications. The PCA9536DR features configuration registers that allow for input or output selection, input port, output port, and polarity inversion (active-high or active-low operation).
Key Specifications
| Specification | Value |
|---|---|
| Operating Voltage (VCC) | 1.65-V to 5.5-V |
| Interface | I2C and SMBus |
| Number of I/O Bits | 4-bit |
| Package Type | SOIC-8 |
| Operating Temperature | -40°C to 85°C |
| Standby Current Consumption | 1 μA Max |
| I/O Configuration | Input or Output selection via configuration register |
| Polarity Inversion | Active-high or active-low operation |
Key Features
- Low standby current consumption of 1 μA Max, reducing power consumption in standby mode.
- Configuration registers for input or output selection, input port, output port, and polarity inversion (active-high or active-low operation).
- I/O ports can be configured as inputs with weak pullup to VCC or as outputs with low-impedance paths to VCC or GND.
- Internal power-on reset holds the device in a reset condition until VCC reaches the power-on reset threshold (VPOR).
- Available in the Texas Instruments NanoFree™ package.
Applications
- General-purpose remote I/O expansion for microcontroller families.
- Industrial control systems requiring additional I/O ports.
- Automotive and consumer electronics where low power consumption is critical.
- Embedded systems and IoT devices needing flexible I/O configurations.
Q & A
- What is the operating voltage range of the PCA9536DR?
The PCA9536DR operates within a voltage range of 1.65-V to 5.5-V VCC.
- What interface does the PCA9536DR use?
The PCA9536DR uses the I2C and SMBus interface.
- How many I/O bits does the PCA9536DR have?
The PCA9536DR has 4-bit I/O.
- What is the package type of the PCA9536DR?
The PCA9536DR is available in an SOIC-8 package.
- What is the standby current consumption of the PCA9536DR?
The standby current consumption is 1 μA Max.
- Can the I/O ports be configured as inputs or outputs?
Yes, the I/O ports can be configured as inputs with weak pullup to VCC or as outputs with low-impedance paths to VCC or GND.
- What is the purpose of the internal power-on reset?
The internal power-on reset holds the device in a reset condition until VCC reaches the power-on reset threshold (VPOR).
- What are some common applications of the PCA9536DR?
Common applications include general-purpose remote I/O expansion for microcontroller families, industrial control systems, automotive and consumer electronics, and embedded systems.
- Can the polarity of the input port be inverted?
Yes, the polarity of the input port can be inverted using the Polarity Inversion register.
- What is the operating temperature range of the PCA9536DR?
The operating temperature range is -40°C to 85°C.
