SN75LPE185DWG4

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The SN75LPE185DWG4 is an octal, low-power, TIA/EIA-485-A and ISO 8482-Compliant RS-422 Logic Port Transceiver. As a driver/receiver, it allows data being transmitted between a controller and a peripheral device. By combining the system power and a low power level-shifting transceiver, it provides an integrated solution for applications used in EMI sensitive environment.

The SN75LPE185DWG4 is a receiver/transceiver comprised of an octal receiver and a bidirectional driver that utilizes an on-chip low power level-shifting circuit so that asynchronous data communication between data terminals operating at different voltage levels can be achieved. The built-in receiver works essentially in a receiver-only configuration. It allows systems operating with different logic levels to communicate bilaterally over huge distances through the RS-485 standard.

This device carries the delta Sigma-TTL class A and class B logic level protocol. The two-channel communication interface supports two-wire half duplex or four-wire full duplex communications. As a result, it is suitable for applications were two or more devices are connected together to form a network.

The SN75LPE185DWG4 offers many advantages like a wide transmission range, low power consumption, integrated protection diodes for overvoltage protection, low propagation delay and low supply voltage range. It also supports auto baud rate selection, data format auto negotiation and flexible output configuration. The device is suitable for point to point data applications like Automation industry, Security system, Embedded systems and Automotive.

The working principle of the SN75LPE185DWG4 consists of a transmitter and a receiver. The transmitter converts the input data into a serial bit stream which is transmitted along the bus. The receiver detects the input data by monitoring the status of the bus line. The output is generated based on the logic state of the data stream.

The SN75LPE185DWG4 includes two integrated active pull-up resistors with 1.6 Ω, which pulls up the bus line when no device is transmitting, making the line stay in a high impedance condition. The device also includes three integrated low-power Schottky diodes that protect the pins against overvoltage, allowing the device to operate safely in a noisy environment. Also, the device allows bi-directional communications and can sustain simultaneous transmissions by multiple devices, which eliminates the need of additional logic components.

In summary, the SN75LPE185DWG4 is an octal, low-power TIA/EIA-485-A and ISO 8482-Compliant RS-422 logic port transceiver, This device offers many advantages including a wide transmission range, low power consumption, integrated protection diodes for overvoltage protection, low propagation delay and low supply voltage range. It is suitable for point to point data applications such as Automation industry, Security systems, Embedded systems and Automotive.

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