TCA6416PWG4

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Interface - I/O Expanders

The TCA6416PWG4 application field and working principle are in the digital electronics industry, and I/O expanders are essential components of the industry. I/O expanders are components which provide additional input/output ports in order to extend the existing I/O count of a device. The TCA6416PWG4 is an expander designed and manufactured by Texas Instruments and offers 16 I/O lines, offering a great solution for all sorts of applications. The TCA6416PWG4 is designed to be used in a lot of applications, like GPIO expansion, analog-to-digital conversion, pulse-width modulation among other things, and offers great reliability, robustness and extended temperature range.

General Description

The TCA6416PWG4 is a general purpose 16-bit I/O expander for I2C-bus and SMBus applications. It provides a 16-bit I/O port with an on-chip pull-up to VDD. It features an interrupt output, address-controlled port direction configuration, and it also offers multiple VDD and VSS options. The TCA6416PWG4 is available in a tiny 16-pin WQFN package. The package offers a large number of small active areas for surface-mount technology, and it additionally offers additional cost savings due to its miniaturization.

Features

• 16 inputs/outputs configurable as input or output
• Multi-channel design supports up to 16 I/O lines
• On-chip pull-up
• Two interrupt output pins
• Address controlled port direction configuration
• For I2C-bus and SMBus applications
• Controls up to 3 external transceivers
• Through holes for improved RF performance
• Very low standby current
• High extended temperature range applications: -40 to 85°C
• Small 16-pin WQFN package

Working Principle

The TCA6416PWG4 leverages I2C-bus and SMBus architecture to interface with the host controller. It works by receiving instructions from the host controller and performing the appropriate action based on the instructions. The TCA6416PWG4 implements address mapping to differentiate between the ports connected to it and the ports connected to other I/O expanders, and also to allow multiple I/O expanders to be stacked together. The I/O expanders provide additional input/output ports to the host controller, and it can be used to extend the I/O count of the controller while offering the same level of reliability and robustness.

The TCA6416PWG4 chip contains an I/O logic and an I/O state machine which are used to route data from the I/O ports to the host controller. When an instruction is received from the host controller, the chip’s I/O state machine is updated and the corresponding action is triggered. The I/O ports are then used to send data to and receive data from the other components connected to the chip.

Conclusion

The TCA6416PWG4 is an important I/O expander in the digital electronics industry, and it offers a great solution for all sorts of applications, ranging from GPIO expansion to pulse-width modulation. The chip offers great reliability, robustness, low power consumption and temperature range and is available in a tiny 16-pin WQFN package. It leverages I2C-bus and SMBus architecture in order to interface with the host controller and works by receiving instructions from the host controller and performing the appropriate action based on the instructions.

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