SN65LBC184DR UART Interface IC RS-485 Interface IC Trans Volt Spprssn Diff Transceiver

1 Features

• 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 LeCM GROUPhs

• 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

2 Applications

• Industrial Networks

• Utility Meters

• Motor Control

3 Description

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.

Device Information