SN65LBC184DR

Product Summary

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 Ma

Parametrics

A biexponential function defined by separate rise and fall times for voltage and current simulates the
combination wave. The standard 1.2 μs/50 μs combination waveform is shown in Figure 1 and in the test
description in Figure 15.
The device also includes additional desirable features for party-line data buses in electrically noisy environment
applications including industrial process control. The differential-driver design incorporates slew-rate-controlled
outputs suf ficient to transmit data up to 250 kbps. Slew-rate control allows longer unterminated cable runs and
longer stub lengths from the main backbone than possible with uncontrolled and faster voltage transitions. A
unique receiver design provides a fail-safe output of a high level when the inputs are left floating (open circuit).
The SN75LBC184 and SN65LBC184 receiver also includes a high input resistance equivalent to one-fourth unit
load allowing connection of up to 128 similar devices on the bus.
The SN75LBC184 is characterized for operation from 0°C to 70°C. The SN65LBC184 is characterized from
?40 °C to 85°C.

Features

 


 



 


 
DIFFERENTIAL TRANSCEIVER WITH TRANSIENT VOLTAGE SUPPRESSION