MCP23018-E/MJ

Series:	--
Packaging:	Tube
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Number of I/O:	16
Interface:	I²C
Interrupt Output:	Yes
Features:	POR
Output Type:	Open Drain
Current - Output Source/Sink:	25mA
Clock Frequency:	3.4MHz
Voltage - Supply:	1.8 V ~ 5.5 V
Operating Temperature:	-40°C ~ 125°C
Mounting Type:	Surface Mount
Package / Case:	24-VFQFN Exposed Pad
Supplier Device Package:	24-QFN (4x4)
Base Part Number:	MCP23018

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Introduction

The MCP23018-E/MJ is an interface-I/O expander which operates with an I2C interface. It provides a cost-effective solution for expanding the number of available I/O pins. The MCP23018-E/MJ supports up to 16 I/O pins and is expandable up to 8x, allowing up to 128 I/O pins in total. A particular benefit of the MCP23018-E/MJ is its low power consumption, which makes it suitable for battery-powered applications.

Application Field of MCP23018-E/MJ

The MCP23018-E/MJ I/O expander is widely in use in a multitude of fields. It can be applied in interfacing a number of systems, from simple alarms to complex home automation and security systems. Another common use case is in robotics, where the number and complexity of sensors and other peripherals often necessitate the use of an external I/O expander. MCP23018-E/MJ can also be used in healthcare and medical applications, where durability and performance are key requirements. It is also used in industrial sensing and monitoring systems, where its low power consumption allows for extended battery life and, again, improved performance.

Working Principle of MCP23018-E/MJ

TheMCP23018-E/MJ I/O Expander utilizes the I2C Interface, which is a widely used 2-wire interface, to communicate with other microcontrollers or devices. The I2C Interface is a serial bus architecture comprising of a master and multiple slaves. The slave address for the MCP23018-E/MJ is configurable by hardware pins. The MCP23018-E/MJ features 8-bit bidirectional data pins along with 8 additional interrupt pins. The data pins are connected to metal-oxide-semiconductor (MOS) FETs to allow for both input and output operations. The FETs provide a high impedance input buffer which allows for increased flexibility when interfacing with the pins. Additionally, the MCP23018-E/MJ has an integrated EEPROM to store its configuration data to retain its settings even when power is removed. The MCP23018-E/MJ utilizes an onboard register to activate its pins and set their direction and I/O drive mode. It also contains registers to configure its interrupt pins. Interrupts on the MCP23018-E/MJ can be configured to generate interrupts either on the rising edge, falling edge, both edges or voltage level. The device can also be placed into Sleep Mode to reduce the power consumption when the device is idle or in Standby mode.

Conclusion

The MCP23018-E/MJ is an I/O expander which provides a cost-effective and low-power solution for the expansion of I/O pins. It utilizes the I2C interface to communicate with other microcontrollers or devices, and it is often used in a wide range of applications, including home automation and security systems, robotics, healthcare, and industrial sensing and monitoring systems. The MCP23018-E/MJ has 8-bit bidirectional data pins, 8 additional interrupt pins, and an integrated EEPROM to store its configuration data. Additionally, its pins can be configured to generate interrupts and it can be placed into Sleep or Standby mode to reduce power consumption.

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