Texas Instruments

PCA9534ADB  

I/O Expanders

PCA9534ADB Description

The PCA9534ADB is a highly versatile programmable I/O expander designed for use in a wide range of applications requiring I2C and SMBus communication protocols. Manufactured by Texas Instruments, this interface IC chip is equipped with eight I/O lines, making it an ideal solution for expanding the I/O capabilities of microcontrollers and other embedded systems. The PCA9534ADB operates within a supply voltage range of 2.3V to 5.5V and supports a clock frequency of 400 kHz, ensuring reliable and efficient data transfer.

PCA9534ADB Features

• Programmability: The PCA9534ADB offers programmable I/O functionality, allowing users to configure each I/O line as either an input or an output. This flexibility makes it suitable for various applications where custom I/O configurations are required.
• Power-On Reset (POR): The inclusion of a Power-On Reset feature ensures that the device initializes to a known state upon power-up, enhancing system reliability and reducing the risk of erratic behavior.
• Interrupt Output: The PCA9534ADB features an interrupt output, which can be used to signal the microcontroller or host system when a change in the I/O state occurs. This feature minimizes the need for continuous polling, thereby optimizing system performance and reducing power consumption.
• Output Current Capability: With an output source/sink current capability of 10mA and 25mA, the PCA9534ADB can drive a variety of loads, making it suitable for applications requiring both low and high current outputs.
• Compliance and Compatibility: The PCA9534ADB is REACH unaffected and RoHS3 compliant, ensuring it meets the stringent environmental and safety standards required by the electronics industry. Additionally, its ECCN classification as EAR99 facilitates international trade and compliance with export regulations.
• Packaging and Mounting: The device is available in a surface-mount package (16SSOP) and is housed in a tube, making it easy to integrate into modern printed circuit board (PCB) designs. The moisture sensitivity level (MSL) of 1 (unlimited) ensures that the device is robust and suitable for a wide range of manufacturing environments.

PCA9534ADB Applications

The PCA9534ADB is well-suited for applications where I/O expansion is necessary, particularly in systems utilizing I2C and SMBus communication protocols. Some specific use cases include:

• Embedded Systems: Expanding the I/O capabilities of microcontrollers in embedded systems, enabling the connection of additional peripherals such as sensors, actuators, and displays.
• Industrial Automation: Enhancing the control and monitoring capabilities of industrial control systems by providing additional I/O lines for interfacing with various sensors and actuators.
• Consumer Electronics: Increasing the functionality of consumer electronic devices by allowing for more I/O connections, such as buttons, LEDs, and other peripherals.
• Automotive Applications: Providing additional I/O for automotive control units, enabling the integration of more sensors and actuators within the vehicle's electronic systems.

Conclusion of PCA9534ADB

The PCA9534ADB from Texas Instruments stands out as a robust and flexible solution for I/O expansion in a variety of applications. Its programmable I/O lines, Power-On Reset feature, interrupt output, and compliance with industry standards make it a reliable choice for designers and engineers. The device's ability to operate within a wide supply voltage range and support a clock frequency of 400 kHz ensures it can meet the demands of modern electronic systems. Whether used in embedded systems, industrial automation, consumer electronics, or automotive applications, the PCA9534ADB offers a high level of performance and versatility, making it an excellent choice for expanding I/O capabilities in any I2C or SMBus-based system.

PCA9534ADB Documents

Download datasheets and manufacturer documentation for PCA9534ADB

Datasheets :

PCA9534A      

PCN Obsolescence/ EOL :

Mult Dev EOL 28/Mar/2023      

HTML Datasheet :

PCA9534A      

PCN Design/Specification :

Datasheet Update 25/Jun/2014