SN75HVD07DR datasheet by Texas Instruments

SN75HVD07DR Frequently Asked Questions (FAQs)

• What is the maximum cable length that can be used with the SN75HVD07DR?
  The maximum cable length depends on the baud rate and the type of cable used. As a general rule, the maximum cable length is around 100 meters at 9600 bps and 10 meters at 115200 bps. However, it's recommended to consult the RS-485 standard and perform signal integrity analysis to determine the maximum cable length for a specific application.
• Can the SN75HVD07DR be used in a multi-point configuration?
  Yes, the SN75HVD07DR can be used in a multi-point configuration. It is a half-duplex transceiver, which means it can transmit and receive data, but not at the same time. In a multi-point configuration, only one device can transmit at a time, and all other devices must be in receive mode.
• How do I terminate the bus in an RS-485 network using the SN75HVD07DR?
  To terminate the bus in an RS-485 network using the SN75HVD07DR, a 120-ohm resistor should be connected between the A and B lines at each end of the bus. This is to prevent signal reflections and ensure reliable data transmission.
• What is the maximum number of nodes that can be connected to an RS-485 bus using the SN75HVD07DR?
  The maximum number of nodes that can be connected to an RS-485 bus using the SN75HVD07DR is 32. This is a limitation of the RS-485 standard, and it's recommended to consult the standard for more information.
• Can the SN75HVD07DR be used in a point-to-point configuration?
  Yes, the SN75HVD07DR can be used in a point-to-point configuration. In this configuration, the device can be used as a simple serial line driver and receiver, without the need for a multi-point bus.