SN65HVD21DR
Extended common-mode RS-485 transceiver ICs in 8-pin SOIC format
Manufacturer： ti
series introduction
# SN65HVD21DR Product Series Introduction
## 1. Overview
The SN65HVD21DR is a remarkable product series that belongs to the realm of high - speed CAN (Controller Area Network) transceivers. CAN is a widely used communication protocol in various industries, known for its robustness, reliability, and high - speed data transfer capabilities. The SN65HVD21DR series is designed to interface the CAN protocol controller with the physical two - wire CAN bus, enabling seamless communication between different nodes in a CAN network.
## 2. Key Features
### 2.1 High - Speed Performance
- The SN65HVD21DR supports high - speed data transmission rates up to 1 Mbps. This high - speed capability makes it suitable for applications where real - time data transfer is crucial, such as automotive control systems, industrial automation, and high - performance monitoring systems.
- It can quickly transmit and receive data packets, reducing latency and ensuring that the system responds promptly to changes in the environment or control signals.
### 2.2 Low - Power Consumption
- In today's energy - conscious world, power efficiency is a top priority. The SN65HVD21DR series is engineered to consume minimal power, especially in standby or sleep modes. This feature is particularly beneficial for battery - powered devices or applications where power consumption needs to be carefully managed to extend the device's operating life.
- The low - power design also helps in reducing heat generation, which can enhance the overall reliability and longevity of the transceiver.
### 2.3 Robustness and ESD Protection
- The transceivers in the SN65HVD21DR series are built to withstand harsh electrical environments. They offer excellent electrostatic discharge (ESD) protection, which safeguards the device from damage caused by static electricity. This is essential in industrial and automotive settings where ESD events are common.
- Additionally, the series has built - in protection against over - voltage and under - voltage conditions, ensuring stable operation even when the power supply fluctuates.
### 2.4 Wide Operating Temperature Range
- The SN65HVD21DR can operate over a wide temperature range, typically from - 40°C to 125°C. This makes it suitable for use in extreme environmental conditions, such as automotive engine compartments, outdoor industrial equipment, and aerospace applications.
- The ability to function reliably in a broad temperature spectrum ensures the product's versatility and durability in different geographical locations and operating scenarios.
## 3. Functional Block Diagram and Working Principle
### 3.1 Block Diagram
The SN65HVD21DR consists of several key functional blocks, including a CAN protocol controller interface, a transceiver driver, a receiver, and a power management unit. The CAN protocol controller interface is responsible for communicating with the microcontroller or other CAN - enabled devices. The transceiver driver converts the digital signals from the controller into differential signals suitable for transmission over the CAN bus, while the receiver converts the received differential signals back into digital signals for the controller. The power management unit regulates the power supply to ensure stable operation.
### 3.2 Working Principle
When the CAN protocol controller sends a data packet, the SN65HVD21DR's transceiver driver modulates the digital signal into a differential voltage signal on the CAN bus. The differential signaling provides better noise immunity compared to single - ended signaling. On the receiving end, the receiver detects the differential voltage changes on the bus, demodulates them, and converts them back into digital signals that can be processed by the CAN protocol controller.
## 4. Applications
### 4.1 Automotive Industry
- In automotive electronics, the SN65HVD21DR is used in various systems such as engine control units (ECUs), anti - lock braking
Images for reference
8-SOIC
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