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/-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 Max

Pin Compatible With SN75176

Applications:

? Industrial Networks

? Utility Meters

? Motor Control

description

The SN75LBC184 and SN65LBC184 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.