Interface - I/O Expanders

TCA6408PWG4 Application Field and Working Principle

The TCA6408PWG4 is a 3.3V I2C/SMBus CMOS I/O Expander with 8 I/O ports and integrated voltage translators. It is used to interface with different levels allowing the use of voltage levels up to 5.5V and lower. This part has very low power consumption of only 119 µA, with the general purpose pins held de-energized when not being used, and 1.25mΩ output pin drivers.

The TCA6408PWG4 comes in an ultra-thin Quad Flat Non-Leaded package (UQFN-16) and is designed to monitor, control and reduce the power consumed by the system. It is designed to operate over the temperature range of -40°C to +85°C. The TCA6408PWG4 contains an I2C/SMBus serial interface with an 8-bit I/O port, 32 bit address counter and SDA, SCL pins. It features interrupt capability, allowing the user to detect up to 8 GPIO changes, enabling the system to make decisions based on device inputs.

The primary application fields of the TCA6408PWG4 are motor controls, PLCs, sensors, industrial equipment, smart homes and healthcare monitoring. This application requires a high level of reliability in order to perform expected functions, and that’s why the TCA6408PWG4 is especially useful for these applications. It can be used in sensing and detecting objects, controlling pressure in systems and administering data from sensors.

The working principle of TCA6408PWG4 is relatively simple. The I2C/SMBus protocols are used to control the TCA6408PWG4, with commands stored in the device’s registers. Each register can store various parameters, such as input/output levels, thresholds, interrupt times, etc. When these parameters are adjusted by the user, the device will take action according to its programmed logic and will send data accordingly. additionally, the TCA6408PWG4 can be configured to operate with interrupts, meaning it will send a signal to the system when any of the I/O ports change state.

With its ultra-compact form factor, wide-range of functions and low power consumption, the TCA6408PWG4 is a perfect option for Interface-I/O Expanders applications. It can help simplify system designs by expanding the level of control and monitoring available to the user while simultaneously consuming less power than its predecessors.