SN65HVD231DR IC

Technical Specifications of SN65HVD231DR

Datasheet	SN65HVD231DR datasheet
Category	Integrated Circuits (ICs)
Family	Interface – Drivers, Receivers, Transceivers
Manufacturer	Texas Instruments
Series	–
Packaging	Tape & Reel (TR)
Part Status	Active
Type	Transceiver
Protocol	CAN
Number of Drivers/Receivers	1/1
Duplex	Half
Receiver Hysteresis	100mV
Data Rate	1Mbps
Voltage – Supply	3 V ~ 3.6 V
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	8-SOIC (0.154″, 3.90mm Width)
Supplier Device Package	8-SOIC

SN65HVD231DR Introduction

The SN65HVD231DR is a 3.3-V CAN bus transceiver, making connecting microcontrollers to CAN networks easy. It is a transceiver from the SN65HVD23x family, designed to work with both CAN 2.0A and 2.0B. Here, you’ll learn everything you need about the SN65HVD231DR, such as its features, how it works, and what it can do for you.

SN65HVD231DR Description

The controller area network (CAN) transceivers SN65HVD230, SN65HVD231, and SN65HV232 adhere to ISO 11898-2 High-Speed CAN Physical Layer specifications (transceiver). These devices, as well as the CAN network itself, are built with multiple layers of security to ensure their functionality.

They can support data rates of up to 1 Mbps (Mbps) (Mbps). The SN65HVD23x transceivers are compatible with the 3.3 V Ps, MCUs, and DSPs from Texas Instruments with CAN controllers. Additionally, they can be used with equipment that follows the same controller protocol. The hardware is designed to work with software that implements the ISO 11898-compliant physical layer for CAN serial communication.

SN65HVD231DR Features

• It only needs one 3.3 V battery to work.
• In line with ISO 11898-2’s requirements.
• Replace the PCA82C250 with something that uses less power.
• The most ESD protection at bus pins is greater than 16 kV HBM.
• The high input impedance of a bus makes it possible to connect up to 120 nodes to it.

Detailed Description

ISO 11898 outlines the protocol and physical layers for high-speed serial communication over controller area networks (CANs) (transceivers). The multi-master operation, real-time control, data speeds that can be changed up to 1 Mbps, and powerful, redundant error checking to ensure that data is sent reliably. It can connect smart devices like sensors and actuators and handle the electrical conditions of a machine chassis and a factory floor. ISO11898-2 is how the ISO/OSI reference model base levels are used by SN65HVD23x 3.3 V CAN transceivers.

Feature Description

Since the SN65HVD230/231/232 have the same pins, they can be used on the same circuit boards even though they don’t do the same things. These transceivers work with signaling rates up to 1 Mbps and can run on a 3.3 V power supply. They also come with a number of built-in safety features, such as thermal shutdown, bus fault, open-circuit receiver failsafe, and up to 16 kV of ESD protection on the bus pins. If the receiver’s bus wires ever short out, the receiver’s fail-safe design will ensure that the receiver’s output is a high logic.

The bus pins are kept in a high-impedance state for hot-plugging when the VCC is low. This lets the power go on and off without any problems. Because of this high resistance, a node that doesn’t have power won’t mess up the bus. Without this function, most transceivers have a very low output impedance. When the transceiver is turned off, it draws a lot of power, which can make the whole bus stop working.

● Vref Voltage Reference

On the SN65HVD230 and SN65HVD231, the Vref pin (pin 5) can be used as a voltage reference for the VCC/2 voltage. The common mode voltage of the bus can be stabilized even more by connecting this pin to the common mode point of a split termination. It is possible for the Vref pin to be left floating if it is not being used.

● Thermal Shutdown

If the output current is too high or the temperature is too high, the driver will turn off, and the bus pins will become high impedance. The CAN bus pins have a high impedance and are biased to a low level. During thermal shutdown, the transmission line from the D pin is closed. Once the thermal shutdown condition has been fixed and the junction temperature has dropped below the thermal shutdown temperature, the driver will be turned back on, and normal operation will resume. The path from the receiver to the R pin keeps working even when the system shuts down because of heat.

Device Functional Modes

The SN65HVD230 and SN65HVD231’s RS pin (Pin 8) let you switch between high-speed, slope-control, and low-power modes.

● High-Speed Mode

The high-speed mode is activated when a logic low signal is given to the RS pin (pin 8). A high-speed mode of operation is frequently utilized in manufacturing. The output can be switched as soon as feasible because there is no internal restriction on the rise or fall slopes of the output while switching at high speed. Use the slope control mode if rapid acceleration and deceleration could harm emissions performance.

● Slope Control Mode

Unshielded twisted pair bus cable is still utilized to keep system prices low, even though electromagnetic compatibility is frequently necessary. The slope control mode of the SN65HVD230 and SN65HVD231 devices reduces electromagnetic interference brought on by the driver’s rise and fall timings and the harmonics that result from them.

You can modify the rise and fall slopes of the driver outputs by connecting a resistor from RS (pin 8), either to the ground or to a logic low voltage. The amount of current flowing out of the pin determines the slope of the driver’s output signal. With a slew rate of 15 V/s and up to 100 k for a slew rate of 2.0 V/s, this slope control is configured with an external resistor of 10 k.

● The Babbling Idiot Protection of the HVD230

It is possible for a rogue CAN controller to send out messages that cause a total bus lockup (what is referred to in CAN jargon as a babbling idiot). If the CAN controller goes down, the P, MCU, or DSP can still release the bus and turn off the driver by switching to listen-only standby mode. The driver circuit outputs are high-impedance by design when the power is turned off (recessive).

● Sleep Mode of the HVD231

The driver and receiver are turned off when a logic high is sent to RS on the SN65HVD231. This is not the case on the SN65HVD230 (pin 8). RS will stay in a low-power sleep state unless a logic low is sent to it (pin 8). During this sleep mode, the D and R pins are set to logic high, and the bus pins are in a high-impedance state.

Application Information

Using the ISO 11898 standard, this application section explains how to build a CAN network’s physical media attachment layer. Test results and a typical application circuit are shown, and topics like slope control, total loop delay, and compatibility in 5-V CAN networks are discussed.

● CAN Bus States

CAN bus can be in one of two states when it runs on power: dominant or recessive. The bus is in a differentially driven, dominant state when both the D and R logic levels are low. When the D and R pins are high, the receiver’s internal resistors RI and RDiff will set the bus to VCC/2. This is called a recessive bus state.

● Detailed Design Procedure

During the design phase of an app, you should keep the following system-level things in mind. When making a system that works, you must carefully consider the number of nodes, the bus length, and the driver output’s slope.

Conclusion

In conclusion, the SN65HVD231DR is a great choice for engineers and designers who need a strong and flexible CAN bus transceiver for their projects. This transceiver can easily handle a wide range of industrial and automotive applications thanks to its great features, low power use, and low EMI profile. Because it has options and modes that can be changed, it can be used in many different places and for many different purposes. This makes it perform and work as well as possible.

At ICRFQ, we have a huge selection of electronic parts, including the SN65HVD231DR, and our team of experts is always ready to help with any questions or orders. We are here to help, whether you need help choosing the right parts or putting in an order. So, get your next project started by contacting us today. You can trust us to be your go-to source for electronic parts and components because we care about quality and customer satisfaction.

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