SN65HVD21D

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The SN65HVD21D belongs to the family of interface drivers, receivers, and transceivers developed by Texas Instruments. This particular device is a bus transceiver, combining both a driver and a receiver. It is mainly used for data transmission across mediums, such as USB, I2C, and RS-485. This component is highly useful in environments where high-speed, low-power communication is required.

The SN65HVD21D is specifically designed to interfaces two buses, and to make sure that there is no interaction between the two, while maintaining accurate data delivery. It has two one-way channels, i.e., one driver and one receiver. Each of the channels has its own enable-input and direction-input pins. The enable pin, when high, puts the device in operating mode. When the enable-pin is low, the input and output of the driver are put in the \'high impedance\' state, thus ensuring that there is no current flow between the two connected buses.

The maximum data rate achievable by SN65HVD21D is approximately 10 Mbps. However, the exact data rate of course depends upon the environment, the wiring of the bus, etc.

apart from the datasheet specified parameters, SN65HVD21D also has exceptional immunity to ESD and other transient effects, as well as good immunity to EMI (electromagnetic interference). This is provided by the internal design of the IC, which gives excellent balanced performance even in harsh conditions.

The SN65HVD21D has a power supply voltage range of between 3.3V and 5.5V, allowing it to easily interface with different voltage levels. As a result, it is well-suited for different applications, such as automotive and battery-powered devices. It also has a maximum power consumption of about 467 mW.

The SN65HVD21D\'s sophisticated protocol logic also helps reduce timing errors. Additionally, the device is provided with integrated fail-safe circuits, ensuring an accurate data delivery even when an input is stuck high or low. This device is available in various packages, including SOIC and TSSOP.

In summary, due to its excellent performance, operational speed, low-power consumption, and ESD/EMI immunity, the SN65HVD21D is highly suitable for data transmission across mediums such as USB, I2C and RS-485. It is also particularly suitable for automotive and battery-powered applications due to its wide power supply voltage range.

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