MCP23008T-E/SSVAO

Series:	Automotive, AEC-Q100
Packaging:	Tape & Reel (TR)
Part Status:	Active
Number of I/O:	8
Interface:	I²C
Interrupt Output:	Yes
Features:	POR
Output Type:	Push-Pull
Current - Output Source/Sink:	25mA
Clock Frequency:	10MHz
Voltage - Supply:	4.5 V ~ 5.5 V
Operating Temperature:	-40°C ~ 125°C
Mounting Type:	Surface Mount
Package / Case:	20-SSOP (0.209", 5.30mm Width)
Supplier Device Package:	20-SSOP

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Introduction

MCP23008T-E/SSVAO is an Interface - I/O Expanders (IOE) device from Microchip Technology. It is an I2C motion controllability 8-bit I/O port expander with up to eight I/O ports. It has a supply voltage ranging from 2.7 to 5.5V and is ideal for applications needing maximum flexibility in their I/O output. Applications usually include but are not limited to keypad interfacing, sensor interfacing, LED control, pulse measurement and switch control.

Application Field

The applications of MCP23008T-E/SSVAO are varied depending on its usability and flexibility in terms of I/O ports. For example, its I/O can be used for controlling GPIOs, LEDs, or switch states. Additionally, it can function as a data-logger by collecting sensor readings over time and interpreting the data for further use. Finally, its I/O ports can be used for interfacing with other devices such as keypads, encoders and other I/O devices.One important application of the MCP23008T-E/SSVAO is in lighting control applications. Its I/O ports can be designed to communicate directly with light dimmers or other lighting control devices, allowing the I/O ports to be used to control the brightness of lights in a room or a building. Additionally, it can be used to automate lighting-schedules, allowing switching the lights on or off based upon the time of the day or based on the presence of any occupants in the room.Another important application for the MCP23008T-E/SSVAO is in motor-control applications. Its I/O ports can be used for controlling the speed, direction and torque of motors, as well as for monitoring the feedback from the motors. This makes it useful for controlling simple motor-based applications such as window shades, door openers and automatic garage doors.

Working Principle

The MCP23008T-E/SSVAO can be connected to microcontrollers and other devices through the I2C bus, which is used to configure the device and to return data from the I/O ports. The I2C bus is a two-way communication protocol that uses two wires to connect devices. The signal lines on the I2C are used to send chunks of data back and forth between devices.In the case of the MCP23008T-E/SSVAO, the microcontroller will use the I2C bus to first write an 8-bit value to indicate the direction in which the I/O pins should be configured. In other words, the microcontroller can choose to configure the I/O pins as inputs or outputs. After the microcontroller writes the configuration data, it can then read or write data to the I/O pins.The I/O ports of the MCP23008T-E/SSVAO can be configured as either open-drain outputs or as non-open-drain outputs. Open-drain outputs are configured in a way that only allows for current to be pulled low, and are usually used to control outputs, such as LEDs or motors. Non-open-drain outputs are configured in a way that allows for current to be both pushed and pulled, making them suitable for interfacing with other I/O devices, such as switches and keypads. The MCP23008T-E/SSVAO also has a library of functions available, which can be used to ease the programming process. These functions allow the user to easily configure and control the I/O ports of the device, as well as read data from them.

Conclusion

The MCP23008T-E/SSVAO is a versatile, feature-rich I/O Expander from Microchip Technology. It is useful for a variety of applications ranging from controlling LED, controlling motors or interfacing with other I/O devices. Some of its features include a supply voltage ranging from 2.7 - 5.5V, 8 I/O pins that can be configured as open-drain pins or non-open-drain pins, and a library of functions that make programming the device easier.

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