Overview
The PCA9534ADBR is an 8-bit I/O expander produced by Texas Instruments, designed to enhance the I/O capabilities of microcontrollers and other digital systems. This IC is part of the PCA9534 series, which is widely used in applications requiring additional input/output ports. The PCA9534ADBR operates over a wide voltage range, making it suitable for various embedded systems and industrial applications. Its key features include low power consumption, programmable polarity inversion, and interrupt output for efficient system management. The device is housed in a TSSOP-16 package, ensuring compactness and ease of integration into PCB designs.
Key Specifications
| Parameter | Value | Unit | Notes |
|---|---|---|---|
| Supply Voltage | 2.3 to 5.5 | V | Wide operating range |
| I/O Pins | 8 | - | Configurable as input or output |
| Operating Temperature | -40 to +85 | °C | Industrial-grade |
| I²C Bus Frequency | 400 | kHz | Standard mode |
| Interrupt Output | Yes | - | Supports system-level interrupts |
| Package | TSSOP-16 | - | Compact and surface-mountable |
| Polarity Inversion | Programmable | - | Simplifies logic level matching |
Key Features
- 8 Configurable I/O Pins: Each pin can be independently set as an input or output, providing flexibility in system design.
- Wide Voltage Range: Operates from 2.3V to 5.5V, making it compatible with a variety of microcontrollers and logic levels.
- Interrupt Output: Features an interrupt pin that alerts the host microcontroller of input changes, reducing the need for continuous polling.
- Programmable Polarity Inversion: Allows inversion of the input data register, simplifying logic level matching in complex systems.
- Low Power Consumption: Ideal for battery-powered and energy-efficient applications.
Applications
The PCA9534ADBR is widely used in applications requiring additional I/O ports, such as industrial automation, consumer electronics, and embedded systems. In industrial automation, it is employed to control sensors, actuators, and other peripherals. In consumer electronics, it enhances the functionality of devices like smart home controllers and gaming consoles. Its compact package and low power consumption make it suitable for portable devices, including wearables and IoT gadgets. Additionally, its interrupt feature ensures efficient system management in real-time applications.
Q & A
1. What is the purpose of the PCA9534ADBR?
The PCA9534ADBR is an 8-bit I/O expander designed to provide additional input/output ports for microcontrollers and digital systems.
2. What voltage range does the PCA9534ADBR support?
It operates from 2.3V to 5.5V, making it compatible with a wide range of microcontrollers and logic levels.
3. Can the I/O pins be configured individually?
Yes, each of the 8 I/O pins can be independently configured as an input or output.
4. Does the PCA9534ADBR support interrupts?
Yes, it features an interrupt output pin that alerts the host microcontroller of input changes.
5. What is the maximum I²C bus frequency supported?
The PCA9534ADBR supports a maximum I²C bus frequency of 400 kHz in standard mode.
6. Is the PCA9534ADBR suitable for industrial applications?
Yes, it operates in a temperature range of -40°C to +85°C, making it suitable for industrial environments.
7. What package does the PCA9534ADBR come in?
It is available in a TSSOP-16 package, which is compact and surface-mountable.
8. How does programmable polarity inversion work?
This feature allows inversion of the input data register, simplifying logic level matching in complex systems.
9. Is the PCA9534ADBR energy-efficient?
Yes, it is designed for low power consumption, making it ideal for battery-powered and energy-efficient applications.
10. What are typical applications of the PCA9534ADBR?
It is commonly used in industrial automation, consumer electronics, embedded systems, and IoT devices.
