SN65LBC031QD

Series:	--
Packaging:	Tube
Part Status:	Active
Type:	Transceiver
Protocol:	CANbus
Number of Drivers/Receivers:	1/1
Duplex:	Half
Receiver Hysteresis:	180mV
Data Rate:	--
Voltage - Supply:	4.5 V ~ 5.5 V
Operating Temperature:	-40°C ~ 125°C
Mounting Type:	Surface Mount
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Supplier Device Package:	8-SOIC
Base Part Number:	SN65LBC031Q

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SN65LBC031QD Application Field and Working Principle

Interfacing two or more networks is often a demanding task, especially when they differ vastly in terms of their signalling and operations. One of the prime examples is that of physically connecting two different bus protocols (such as CAN and LIN) together. An additional challenge is presented when the target scenarios such as monitoring, logging, etc. are also considered in the design.The SN65LBC031QD is an integrated circuit transceiver module from Texas Instruments (TI) intended for bridging the gap between various bus technologies. It enables the physical linking of different networks with disparate characteristics, which then can be used for bi-directional data transfer. It contains an on-module power supply for providing stable supply to both sides of the bus.

Functionality and Use Cases

The SN65LBC031QD is based on the integrated transceiver architecture, designed by TI. It has a microcontroller core onboard, which is ethically similar to that of the MSP430. With proper compiled code, the device can communicate with different networks, employing distinct type of frame protocols such as SAE J1939, CAN 2.0A and CAN 2.0B. It is designed to work seamlessly between CAN and LIN bus protocols.This application field of the SN65LBC031QD is typically found in the automotive industry. They are employed in harnessing, logging and diagnosing operations pertaining to automotive application designs. Additionally, the unique setup of the device lends itself to be used for high-integrity monitoring applications as well, such as for medical and military equipment, for regulating data transfer across various networks.

Working Principle

The working principle of the SN65LBC031QD is to interface the physical and electrical layer of the differing bus protocols. The physical layer of the device is based around the LIN standard and is operational from the low voltage source of 12V. The module is capable of interfacing the circuitry with both the CAN and LIN busses, with the offering of several pins for remapping of the same.On the electrical side, the transceiver features an integrated CAN controller and features an output-driver circuit. This output-driver circuit is designed to transmit data as digital signals over the LIN bus, depending upon the signals received by the CAN bus. Moreover, the SN65LBC031QD also features a loop-back detector, used for self-diagnosing operations and ensuring that the data is correctly received and correctly transmitted to the desired device.

Implementing the SN65LBC031QD

When demeaning is to implement the SN65LBC031QD, a programmer is recommended to refer to the device datasheet for specific information and proper understanding of the device components and functionality. Secondly, suitable transceiver state diagrams should be utilized for existing example diagrams and better understand the working of the transceiver. Furthermore, the programming and development environment for the SN65LBC031QD comprises of Differential Receiver, Digital Driver, Transceiver Registers and TJA1041.Once the proper understanding of the device, including programming is done, the device can be connected to both the protocol buses. It is highly recommended to use a breakout board and jumper wires in order to validate the design and then, design can be committed to circuit boards as well.

Conclusion

In conclusion, the SN65LBC031QD is a device designed to enable bi-directional communication between two differently operating protocols, with the help of a single integrated transceiver. The device provides a comprehensive framework for interfacing two differing physical and electrical layers while still making it possible to garner a stable output in terms of data. TI has designed a device that provides outstanding capability and ease of implementation.

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