SN75LBC180NG4

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The SN75LBC180NG4 is a TI high-speed, high-current differential bus transceiver designed for use in keyboard, mouse and other data communications applications. It has a built-in single input receiver and differential line driver. This device offers bi-directional data communication between computers and peripheral devices. It is ideally suited for keyboard, mouse and game controller applications due to its low power dissipation and high data throughput.

Application Field

The SN75LBC180NG4 is widely used in industrial, medical, and consumer electronics, along with other peripherals such as keyboards and mice. It is ideal for applications that require reliable, bi-directional, high-speed data transfer over a differential bus. It is also used in serial and parallel bus applications, as it has the ability to transmit and receive eight bits of parallel data.

Working Principle

The SN75LBC180NG4 works by controlling the data flow both in terms of direction and timing. It consists of two transistors and a differential line receiver. The differential line receiver is activated when the received input voltage is greater than or equal to the threshold voltage of the device. The output of the line receiver is then connected to the input of the two transistors, so that it controls both the data transfer rate and direction, as well as the current level, ensuring reliable data communication.

The device also includes two power supply pins: power supply Vcc and ground. It needs a dual power supply voltage of 3.3V to 5.5V. After providing power to the device, data is transferred in a unidirectional mode by using differential line on the R1 pin. When transmitting data, the driver generates a voltage swinging between 4V and 7V. During operation, the maximum output current of the driver is limited to 7mA. When the device is in the receiving mode, it senses the differential voltage on the R2 and R3 pins.

In addition, the SN75LBC180NG4 has active-low logic outputs for controlling the keyboard and mouse interface, as well as other peripheral devices. The output signals are generated as per the input voltage and can be used to control Keyboard and mouse interface or other peripherals.

The SN75LBC180NG4 is designed for keyboard, mouse and game controller applications, providing high performance, low power consumption and great reliability. The device can transmit and receive data at high speeds and is capable of handling up to eight bits of parallel data. It is compatible with various logic levels, which ensures that it works with most computer systems.

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