SLLS377E May   2000  – January 2023 SN65LBC179A , SN75LBC179A

PRODUCTION DATA  

  1. 1Features
  2. 2Description
  3. 3Revision History
  4. 4Pin Configuration and Functions
  5. 5Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 Dissipation Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Driver Electrical Characteristics
    6. 5.6 Driver Switching Characteristics
    7. 5.7 Receiver Electrical Characteristics
    8. 5.8 Receiver Switching Characteristics
    9. 5.9 Typical Characteristics
  6. 6Parameter Measurement Information
  7. 7Detailed Description
    1. 7.1 Device Functional Modes
      1. 7.1.1 FUNCTION TABLE
      2. 7.1.2 Schematics
  8. 8Device and Documentation Support
    1. 8.1 Receiving Notification of Documentation Updates
    2. 8.2 Support Resources
    3. 8.3 Trademarks
    4. 8.4 Electrostatic Discharge Caution
    5. 8.5 Glossary
  9. 9Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

2 Description

The SN65LBC179A and SN75LBC179A differential driver and receiver pairs are monolithic integrated circuits designed for bidirectional data communication over long cables that take on the characteristics of transmission lines. They are balanced, or differential, voltage mode devices that are compatible with ANSI standard TIA/EIA-485-A and ISO 8482:1987(E). The A version offers improved switching performance over its predecessors without sacrificing significantly more power.

The SN65LBC179A and SN75LBC179A combine a differential line driver and differential input line receiver and operate from a single 5-V supply. The driver differential outputs and the receiver differential inputs are connected to separate terminals for full-duplex operation and are designed to present minimum loading to the bus when powered off (VCC = 0). These parts feature a wide positive and negative common-mode voltage range making them suitable for point-to-point or multipoint data bus applications. The devices also provide positive- and negative-current limiting and thermal shutdown for protection from line fault conditions.

The SN65LBC179A is characterized over the industrial temperature range of –40°C to 85°C. The SN75LBC179A is characterized for operation over the commercial temperature range of 0°C to 70°C.

Package Information
PART NUMBER PACKAGE(1) BODY SIZE (NOM)
SN65LBC179ASN75LBC179A D (SOIC) 4.9 mm x 3.91 mm
P (PDIP) 9.81 mm x 6.35 mm
(1) For all available packages, see the orderable addendum at the end of the data sheet.
GUID-4A2227F0-FD0C-4F46-96A9-59E8C2A4DB8C-low.gif Figure 2-1 Logic Diagram (Positive Logic)