Texas Instruments

PCA9539DBR

PCA9539DBR Description

The PCA9539DBR is a 16-bit I/O expander from Texas Instruments, designed to operate at a clock frequency of 400 kHz. It is an obsolete product, featuring a surface-mount packaging, and is compliant with the RoHS3 standard. The device is designed to work with a supply voltage range of 2.3V to 5.5V, making it suitable for a wide range of applications. It also features an interrupt output, which can be useful in various applications requiring immediate response to changes in the input state.

PCA9539DBR Features

• 16-bit I/O Expander: The PCA9539DBR provides 16 I/O lines, which can be individually configured as inputs or outputs.
• 400 kHz Clock Frequency: The device can operate at a clock frequency of up to 400 kHz, ensuring fast data transfer and processing.
• I2C and SMBus Interface: The PCA9539DBR supports both I2C and SMBus interfaces, providing flexibility in communication protocols.
• POR Feature: The device includes a power-on reset (POR) feature, which ensures a known initial state after power-up.
• 10mA and 25mA Current Source/Sink: The PCA9539DBR can source or sink up to 10mA or 25mA, respectively, making it suitable for driving various types of loads.
• Interrupt Output: The device features an interrupt output, which can be used to signal changes in the input state to the host system.

PCA9539DBR Applications

The PCA9539DBR is ideal for applications where a large number of I/O lines are required, such as:

1. Industrial Control Systems: The device can be used to expand the I/O capabilities of microcontrollers in industrial control systems, providing additional inputs and outputs for sensors and actuators.
2. Automotive Applications: The PCA9539DBR can be used in automotive applications for controlling various electronic systems, such as lighting, climate control, and infotainment systems.
3. Smart Home Systems: The device can be used in smart home systems for controlling lighting, security, and other home automation functions.

Conclusion of PCA9539DBR

The PCA9539DBR is a versatile I/O expander from Texas Instruments, offering 16 I/O lines, a clock frequency of 400 kHz, and support for both I2C and SMBus interfaces. Its features, such as the POR function and interrupt output, make it suitable for a wide range of applications, including industrial control systems, automotive applications, and smart home systems. However, it is important to note that the device is now considered obsolete, so alternative solutions should be considered for new designs.