The SN65LBC180 differential driver and receiver pair is a monolithic integrated circuit designed for bidirectional data communication over long cables that take on the characteristics of transmission lines. It is a balanced, or differential, voltage mode device that meets or exceeds the requirements of industry standards ANSI RS-485 and ISO 8482:1987(E). The device is designed using TI’s proprietary LinBiCMOS™ with the low power consumption of CMOS and the precision and robustness of bipolar transistors in the same circuit.

The SN65LBC180 combines a differential line driver and receiver with 3-state outputs and operates from a single 5-V supply. The driver and receiver have active-high and active-low enables, respectively, which can be externally connected to function as a direction control. The driver differential outputs and the receiver differential inputs are connected to separate terminals for full-duplex operation and are designed to present minimum loading to the bus whether disabled or powered off (VCC = 0). This part features a wide common-mode voltage range making it suitable for point-to-point or multipoint data-bus applications.

The devices also provide positive and negative output-current limiting and thermal shutdown for protection from line fault conditions. The line driver shuts down at a junction temperature of approximately 172°C.

• Qualified for Automotive Applications
• Designed for High-Speed Multipoint Data Transmission Over Long Cables
• Operate With Pulse Durations as Low as 30 ns
• Low Supply Current . . . 5 mA Max
• Meet or Exceed the Requirements of ANSI Standard RS-485 and ISO 8482:1987(E)
• 3-State Outputs for Party-Line Buses
• Common-Mode Voltage Range of -7 V to 12 V
• Thermal Shutdown Protection Prevents Driver Damage From Bus Contention
• Positive and Negative Output Current Limiting
• Pin Compatible With the SN75ALS180

LinBiCMOS is a trademark of Texas Instruments Incorporated.