SN65C3223DBR

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The SN65C3223DBR is an integrated digital (bus) transceiver from Texas Instruments that is commonly used to interface between two data buses. Compared to analog transceivers, this device is easier to implement, more reliable, and more compact. Since its introduction, the SN65C3223DRB has seen extensive use in a variety of industrial and consumer applications. This article will discuss the application fields, general principles of operation and some of the technical specifications of the device.

Application Fields of the SN65C3223DBR

The SN65C3223DBR is designed to meet Automotive Standards ECE/U-92 and ECE/UCAP-17.00. Its main application fields are: automotive networking, automotive automation, MCU/Enthernet interface, medical equipment, home automation, industrial communication buses. It is highly suitable for applications where multiple data-bus systems need to be interfaced, such as the connection between different systems in a car, or between a MCU and an Ethernet Network. It is compatible with the CAN (Controller Area Network) Protocol and is also usable for Industrial Control, Automotive, and Home Automation applications.

General Working Principle

The SN65C3223DBR is an integrated digital transceiver with two independent channels. Each channel contains a Digital-to-Analog (DAC) converter and a driver and receiver interface circuit, while the common part is made up of an Analog-to-Digital (ADC) converter, an analog switch, and a timer. The SN65C3223DBR is capable of operating on either the differential Universal Serial Bus (USB) or the single- ended parallel bus formats.

The SN65C3223DBR can convert between the 3.3V logic levels and the physical signals of the bus format (i.e. High-speed CAN, LIN, Standard CAN and FlexRay bus protocols) with its digital output being compliant with all the mentioned protocols. The transceiver has also been designed with a low current consumption and low electromagnetic emission to meet automotive requirements.

The digital signal transmission is ensured by means of the ‘Error Flag’ which monitors and signals any errors, while successful transmission is indicated by the ‘Valid Frame’ signal. When valid data is received, the SN65C3223DBR adjusts the logical voltage levels of the received signal by using the input buffers and the internal logic level converter. The converted data is sent to the microcontroller for processing.

Technical Specifications of SN65C3223DBR

The SN65C3223DBR is a quad driver and receiver that can handle data rate up to 10 Mbps. It has an input voltage of 3.3V to 5.5V DC and the output current is 2.2A peak. Its operating temperature range is from -40°C to 125°C and its storage temperature range is from -40°C to 140°C. It is housed in a 24 pin TSSOP package.

As can be seen, the SN65C3223DBR is a versatile transceiver that is especially useful in automotive and industrial applications. The transceiver combines high functionality (including two independent channels) with low power requirements and the ability to convert between different bus formats. It is thus a reliable and cost effective choice for interfacing between two data buses.

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