The SN65HVD96 is specifically designed to meet the requirements for a transceiver which operates with no errors if the twisted-pair signal wires are connected normally or reversed. This allows for error free operation in applications where the signal wires may become inadvertently reversed during installation or maintenance. This feature is corrected internally so no intervention from the controller or operator is required. The SN65HVD96 complies with the requirements of ANSI/TIA-4963, Electrical Characteristics of Reversible Balanced Voltage Digital Interface Circuits.

Similar to RS-485, these transceivers can be used for point-to-point, multi-drop, or multi-point networks. Sympol devices are not backwards compatible with, but are an upgrade to, existing RS-485 networks. The pin-out is identical to the industry-standard SN75176 transceiver, allowing direct upgrade from RS-485 to SymPol. Current-limited differential outputs protect in case of driver contention on a party-line bus. High receiver input impedance allows connection of at least 32 nodes. Several fault tolerant features are integrated into the device to protect from operational hazards. Current limiting on the driver outputs protects against short-circuit faults, and operates independently on each driver output. An automatic thermal shutdown protects the driver circuits against over temperature conditions. The receiver output enters a deterministic failsafe state if the bus connection is left disconnected or if the bus wires are shorted together.

The small outline integrated circuit (SOIC) package saves board space compared to equivalent discrete implementations. These devices are fully characterized for operation over the industrial temperature range of –40°C to 85°C.

• Communicate Without Errors on Normal or Reversed-Wire Bus Lines
• Up to 5 Mbps Signaling
• Industrial Temperature Range: –40°C to 85°C
• Symmetric Polarity Receiver
• Receiver Hysteresis > 100 mV
• Connect up to 32 Nodes Plus Parallel Terminators on one Bus, or Connect up to 200 Nodes on an Unterminated Bus
• Transient Protection
  • ±12 kV Human Body Model on Bus Pins
  • ±25 V Repetitive Transient Pulse on Bus Pins
• Additional Reliability Features:
  • Bus Standoff From –35 V to 40 V
  • Driver Output Short-Circuit Current Limit
  • Automatic Thermal Shutdown and Recovery
• Complies with ANSI/TIA-4963 Standard