Product details


Number of transmitters 1 Number of receivers 1 Duplex Half Supply voltage (Nom) (V) 5 Signaling rate (Max) (Mbps) 0.25 IEC 61000-4-2 contact (+/- kV) 8 Isolated No Fault protection (V) -10 to 15 Number of nodes 128 Common mode range -7 to 12 ICC (Max) (mA) 30 Features IEC ESD protection Rating Catalog Operating temperature range (C) -40 to 85 open-in-new Find other RS-485 & RS-422 transceivers

Package | Pins | Size

PDIP (P) 8 93 mm² 9.81 x 9.43 SOIC (D) 8 19 mm² 3.91 x 4.9 open-in-new Find other RS-485 & RS-422 transceivers


  • One-Fourth Unit Load Allows up to 128 Devices on a Bus
  • ESD Protection for Bus Terminals:
    – ±15-kV Human Body Model
    – ±8-kV IEC61000-4-2, Contact Discharge
    – ±15-kV IEC61000-4-2, Air-Gap Discharge
  • Meets or Exceeds the Requirements of ANSI Standard TIA/EIA-485-A and ISO 8482: 1987(E)
  • Controlled Driver Output-Voltage Slew Rates Allow Longer Cable Stub Lengths
  • Designed for Signaling Rates† Up to 250-kbps
  • Low Disabled Supply Current . . . 250 µA Max
  • Thermal Shutdown Protection
  • Open-Circuit Fail-Safe Receiver Design
  • Receiver Input Hysteresis . . . 70 mV Typ
  • Glitch-Free Power-Up and Power-Down Protection
    • Utility Meters
    • Industrial Process Control
    • Building Automation

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The SN65LBC182 and SN75LBC182 are differential data line transceivers with a high level of ESD protection in the trade-standard footprint of the SN75176. They are designed for balanced transmission lines and meet ANSI standard TIA/EIA-485-A and ISO 8482. The SN65LBC182 and SN75LBC182 combine a 3-state, differential line driver and differential input line receiver, both of which operate from a single 5-V power supply. The driver and receiver have active-high and active-low enables, respectively, which can be externally connected together to function as a direction control.

The driver outputs and the receiver inputs connect internally to form a differential input/output (I/O) bus port that is designed to offer minimum loading to the bus. This port operates over a wide range of common-mode voltage, making the device suitable for party-line applications. The device also includes additional features for party-line data buses in electrically noisy environment applications such as industrial process control or power inverters.

The SN75LBC182 and SN65LBC182 bus pins also exhibit a high input resistance equivalent to one-fourth unit load allowing connection of up to 128 similar devices on the bus. The high ESD tolerance protects the device for cabled connections. (For an even higher level of protection, see the SN65/75LBC184, literature number SLLS236.)

The differential driver design incorporates slew-rate-controlled outputs sufficient 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 voltage transitions. The receiver design provides a fail-safe output of a high level when the inputs are left floating (open circuit). Very low device supply current can be achieved by disabling the driver and the receiver.

The SN65LBC182 is characterized for operation from –40°C to 85°C, and the SN75LBC182 is characterized for operation from 0°C to 70°C.

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Technical documentation

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Type Title Date
* Datasheet SN65LBC182, SN75LBC182 Differential Bus Transceiver datasheet (Rev. A) Mar. 25, 2005
User guides RS-485 Half-Duplex EVM User's Guide (Rev. B) Jun. 12, 2013
Application notes RS-485 for E-Meter Applications (Rev. A) Aug. 06, 2004
Application notes The RS-485 Unit Load and Maximum Number of Bus Connections Mar. 15, 2004

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

document-generic User guide
The RS-485 half-duplex evaluation module (EVM) helps designers evaluate device performance, supporting fast development and analysis of data-transmission systems using any of the SN65HVD1x, SN65HVD2x, SN65HVD7x, SN65HVD8x and SN65HVD96 half-duplex transceivers. The EVM board comes without the RS-485 (...)

The EVM lets you quickly, easily and accurately evaluate TI's family of RS-485 products.

  • RS-485 half-duplex EVM PWB
  • Screw-type SMA jacks and Bergstik headers serve as the I/O connections
  • Banana jacks serve as the DC power input terminals

Design tools & simulation

SLLC076.ZIP (4 KB) - IBIS Model
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
SPICE-based analog simulation program
TINA-TI TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
document-generic User guide

CAD/CAE symbols

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SOIC (D) 8 View options

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