Overview
The PCA9534ADW, manufactured by Texas Instruments, is a remote 8-bit I2C and SMBus low-power I/O expander. This component is designed to provide general-purpose remote I/O expansion for most microcontroller families via the I2C interface. It is particularly suited for applications requiring low power consumption and efficient I/O management. The PCA9534ADW is packaged in a 16-SOIC format, making it suitable for compact designs. Its market positioning targets developers and engineers in industrial automation, consumer electronics, and automotive electronics, offering a reliable solution for expanding I/O capabilities in space-constrained environments.
Key Specifications
| Parameter | Value | Unit | Notes |
|---|---|---|---|
| Operating Voltage | 2.3 to 5.5 | V | |
| Standby Current | 1 | μA | Max |
| I2C Bus Frequency | 400 | kHz | Fast Mode |
| Number of I/O Ports | 8 | ||
| Interrupt Output | Open-drain | Active low | |
| ESD Protection | 2000 (HBM), 200 (MM), 1000 (CDM) | V | |
| Operating Temperature | -40 to 85 | °C |
Key Features
- Low standby current consumption (1μA max) for power-sensitive applications.
- Compatible with 5V-tolerant I/O ports, ensuring versatility in mixed-voltage systems.
- Hardware address pins allow up to eight devices on the same I2C/SMBus, expanding system scalability.
- Internal power-on reset ensures reliable initialization at startup.
- Latch-up performance exceeds 100mA per JESD 78, Class II standards, ensuring robust operation.
Applications
The PCA9534ADW is widely used in various fields, including industrial automation, where it facilitates efficient control of multiple I/O devices. In consumer electronics, it enables compact and low-power designs for smart home devices. Automotive electronics benefit from its robust performance and reliability in harsh environments. Additionally, it is employed in LED lighting systems for its high current drive capability and low power consumption.
Q & A
1. What is the operating voltage range of the PCA9534ADW?
The PCA9534ADW operates within a voltage range of 2.3V to 5.5V.
2. How many I/O ports does the PCA9534ADW support?
It supports 8 I/O ports.
3. What is the standby current consumption of the PCA9534ADW?
The standby current consumption is 1μA maximum.
4. Is the PCA9534ADW compatible with 5V systems?
Yes, it features 5V-tolerant I/O ports.
5. How many devices can be connected on the same I2C/SMBus using the PCA9534ADW?
Up to eight devices can be connected using hardware address pins.
6. What is the maximum I2C bus frequency supported by the PCA9534ADW?
It supports a maximum I2C bus frequency of 400kHz in Fast Mode.
7. Does the PCA9534ADW include ESD protection?
Yes, it offers ESD protection exceeding 2000V HBM, 200V MM, and 1000V CDM.
8. What is the operating temperature range of the PCA9534ADW?
It operates within a temperature range of -40°C to 85°C.
9. Can the PCA9534ADW be used in automotive applications?
Yes, its robust design makes it suitable for automotive electronics.
10. What is the purpose of the interrupt output in the PCA9534ADW?
The interrupt output signals changes in input status, reducing the need for continuous polling.
