The SN75LBC184P 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 SN75LBC184P 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.
Feature
- 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
