PCA9539D,118

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Number of I/O:	16
Interface:	I²C, SMBus
Interrupt Output:	Yes
Features:	POR
Output Type:	Push-Pull
Current - Output Source/Sink:	10mA, 25mA
Clock Frequency:	400kHz
Voltage - Supply:	2.3 V ~ 5.5 V
Operating Temperature:	-40°C ~ 85°C
Mounting Type:	Surface Mount
Package / Case:	24-SOIC (0.295", 7.50mm Width)
Supplier Device Package:	24-SO
Base Part Number:	PCA9539

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PCA9539D,118 application field and working principleThe PCA9539D,118 is a device from NXP Semiconductors that is classified as an Interface - I/O Expander. It is designed to provide increased electronic design flexibility in small systems by using an I2C controlled 8-bit I/O expander. This device is made to be an interface between an I2C-bus and an 8-bit parallel port, providing many field-programmable configurations and features. The PCA9539D, 118 has a number of different application fields that it can be used in for various functions, such as for data buses, control buses, general-purpose I/O ports, and status flag outputs. It can be used in automotive electronics, on-board cameras, and even mobile phones.The PCA9539D,118 has a few main features that make it valuable for its applications. It is a CMOS device with low voltage operation. It is a low-power solution because it does not have to have resistive pull-ups for I2C-bus communication, therefore it does not consume as much power as other I2C-bus devices. The PCA9539D,118’s working principle is that it allows users to control and configure the device using I2C commands. The device receives an I2C command and then configures the device according to the command’s instructions. This command also triggers various features on the device such as setting direction registers, interrupt registers, and mask registers. With these features, users can configure the device to fit their needs depending on the application.This device also has a configurable pull-up current and slew rate, as well as adjustable drive strength depending on the output load. It has an adjustable port voltage that can be set from 5 to 12V, depending on the user’s needs. The device can be used both in an open-drain I2C bus environment or in an I2C-bus environment with a voltage output.When it comes to operating modes, the PCA9539D,118 is capable of operating in both Output Start Mode and Input Start Mode. In Output Start Mode, the device is configured to drive an output pin when the I2C-bus command is sent. In Input Start Mode, the device is configured to read an input pin when the I2C-bus command is sent. Both of these modes allow the device to react to the commands that are sent to it.The PCA9539D, 118 also has a feature called ‘watchdog timer’ that provides a fail-safe mechanism so that the device can recover if it encounters a problem. This feature allows the device to reset itself if it does not receive any commands for a certain amount of time, which ensures that it is always functioning properly. Overall, the PCA9539D,118 is a useful device for providing increased electronic design flexibility in small systems. It is capable of being used in a variety of device applications due to its configurability, low-power consumption and adjustable drive strength. It is also capable of supporting both Output and Input Start Modes, as well as a watchdog timer for issues. These features make the PCA9539D,118 a valuable tool for many of today’s designs.

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