The SN75LBC184 and SN65LBC184 devices are differential data line transceivers in the trade-standard footprint of the SN75176 with built-in protection against high-energy noise transients. This feature provides a substantial increase in reliability for better immunity to noise transients coupled to the data cable over most existing devices. Use of these circuits provides a reliable low-cost direct-coupled (with no isolation transformer) data line interface without requiring any external components.
●The SN75LBC184 and SN65LBC184 can withstand overvoltage transients of 400-W peak (typical). The conventional combination wave called out in IEC 61000-4-5 simulates the overvoltage transient and models a unidirectional surge caused by overvoltages from switching and secondary lightning transients.
● Integrated Transient Voltage Suppression
● ESD Protection for Bus Terminals Exceeds:
●±30 kV IEC 61000-4-2, Contact Discharge
●±15 kV IEC 61000-4-2, Air-Gap Discharge
●±15 kV EIA/JEDEC Human Body Model
● Circuit Damage Protection of 400-W Peak
●(Typical) Per IEC 61000-4-5
● Controlled Driver Output-Voltage Slew Rates
●Allow Longer Cable Stub Lengths
● 250-kbps in Electrically Noisy Environments
● Open-Circuit Fail-Safe Receiver Design
● 1/4 Unit Load Allows for 128 Devices Connected
●on Bus
● Thermal Shutdown Protection
● Power-Up and Power-Down Glitch Protection
● Each Transceiver Meets or Exceeds the
●Requirements of TIA/EIA-485 (RS-485) and
●ISO/IEC 8482:1993(E) Standards
● Low Disabled Supply Current 300 µA Maximum
● Pin Compatible With SN75176
