PCA9541D/01,118 Integrated Circuits (ICs)

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Applications:	2-Channel I²C Multiplexer
Interface:	I²C, SMBus
Voltage - Supply:	2.3 V ~ 5.5 V
Package / Case:	16-SOIC (0.154", 3.90mm Width)
Supplier Device Package:	16-SO
Mounting Type:	Surface Mount
Base Part Number:	PCA9541

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The PCA9541D/01,118 is a component of the I2C bus that enables you to expand your applications and make multiple peripherals, such as a keyboard, mouse and printer, able to connect to the same bus. This component is a component of the special Icron family of components from National Semiconductor which allows you to make I2C a mainstay of your electronic project design.The PCA9541D/01,118 has two channels, each consisting of two control lines. By connecting each of these channels to the data bus, it is possible to enable up to 4 peripherals to be connected to the same bus. The component has two slave addressing functions, one for each channel, so the PCA9541D/01,118 can be used to drive a total of 8 peripherals. The component also has the capability to detect any slave address, so the 8 peripherals can be of any type - mouse, keyboard, printer etc. As such, the component is ideal for those looking to interact with multiple inputs simultaneously with one data set.The component has mode selection registers which allow the user to select any desired mode from the available options. These include allowing the I2C bus to be either Always On, Always Off or Auto selection. In the Always On state, the component will always be enabled, whereas in the Always Off state it will be disabled at all times. The Auto selection option will cause the component to switch to an appropriate state based on the slave address it is detecting for the currently active channel. The component also features a power supply monitoring circuit which monitors the voltage level of the system power supply and alarms the user if the power level falls to an undesired level. This is useful for preventing unexpected system crashes.In terms of its working principle, the PCA9541D/01,118 makes use of the I2C bus by connecting each of its two control lines to the bus. When a control line is connected to the bus, it will identify any slave address it receives and pass that information along to the selected channel. The component then processes the information and produces an appropriate output signal to enable the selected peripheral.The PCA9541D/01,118 is an invaluable component for those wanting to integrate multiple peripherals into one I2C bus. With its easy to use mode selection registers and ability to detect any slave address, it is a reliable component for those seeking dependable I2C control. In addition, its power supply monitoring circuit ensures that the component does not suffer from any unexpected system crashes.

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