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SN65LBC184

SN75LBC184

SLLS236I –OCTOBER 1996–REVISED JUNE 2015

SNx5LBC184 Differential Transceiver With Transient Voltage Suppression

1 Features 3 Description

The SN75LBC184 and SN65LBC184 devices are

• Integrated Transient Voltage Suppression

differential data line transceivers in the trade-standard

• ESD Protection for Bus Terminals Exceeds:

footprint of the SN75176 with built-in protection

±30 kV IEC 61000-4-2, Contact Discharge

against high-energy noise transients. This feature

±15 kV IEC 61000-4-2, Air-Gap Discharge

provides a substantial increase in reliability for better

±15 kV EIA/JEDEC Human Body Model

immunity to noise transients coupled to the data

cable over most existing devices. Use of these

• Circuit Damage Protection of 400-W Peak

circuits provides a reliable low-cost direct-coupled

(Typical) Per IEC 61000-4-5

(with no isolation transformer) data line interface

• Controlled Driver Output-Voltage Slew Rates

without requiring any external components.

Allow Longer Cable Stub Lengths

The SN75LBC184 and SN65LBC184 can withstand

• 250-kbps in Electrically Noisy Environments

overvoltage transients of 400-W peak (typical). The

• Open-Circuit Fail-Safe Receiver Design

conventional combination wave called out in IEC

• 1/4 Unit Load Allows for 128 Devices Connected

61000-4-5 simulates the overvoltage transient and

models a unidirectional surge caused by overvoltages

on Bus

from switching and secondary lightning transients.

• Thermal Shutdown Protection

• Power-Up and Power-Down Glitch Protection

Device Information

(1)

• Each Transceiver Meets or Exceeds the

PART NUMBER PACKAGE BODY SIZE (NOM)

Requirements of TIA/EIA-485 (RS-485) and

SOIC (8) 4.90 mm × 3.91 mm

SN65LBC184,

ISO/IEC 8482:1993(E) Standards

SN75LBC184

PDIP (8) 9.81 mm × 6.35 mm

• Low Disabled Supply Current 300 μA Maximum

(1) For all available packages, see the orderable addendum at

• Pin Compatible With SN75176

the end of the datasheet.

2 Applications

• Industrial Networks

• Utility Meters

• Motor Control

Logic Symbol

NOTE: This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

SN65LBC184

SN75LBC184

SLLS236I –OCTOBER 1996–REVISED JUNE 2015

www.ti.com

Table of Contents

8.1 Overview ................................................................. 12

1 Features.................................................................. 1

8.2 Functional Block Diagram ....................................... 12

2 Applications ........................................................... 1

8.3 Feature Description................................................. 12

3 Description ............................................................. 1

8.4 Device Functional Modes........................................ 13

4 Revision History..................................................... 2

9 Application and Implementation ........................ 15

5 Pin Configuration and Functions......................... 3

9.1 Application Information............................................ 15

6 Specifications......................................................... 3

9.2 Typical Application ................................................. 15

6.1 Absolute Maximum Ratings ...................................... 3

10 Power Supply Recommendations ..................... 19

6.2 ESD Ratings.............................................................. 3

11 Layout................................................................... 19

6.3 Recommended Operating Conditions....................... 4

11.1 Layout Guidelines ................................................. 19

6.4 Thermal Information.................................................. 4

11.2 Layout Example .................................................... 19

6.5 Electrical Characteristics: Driver ............................... 5

12 Device and Documentation Support ................. 20

6.6 Electrical Characteristics: Receiver .......................... 5

12.1 Related Links ........................................................ 20

6.7 Driver Switching Characteristics ............................... 6

12.2 Community Resources.......................................... 20

6.8 Receiver Switching Characteristics........................... 6

12.3 Trademarks........................................................... 20

6.9 Dissipation Ratings ................................................... 6

12.4 Electrostatic Discharge Caution............................ 20

6.10 Typical Characteristics............................................ 7

12.5 Glossary................................................................ 20

7 Parameter Measurement Information .................. 8

13 Mechanical, Packaging, and Orderable

8 Detailed Description............................................ 12

Information ........................................................... 20

4 Revision History

NOTE: Page numbers for previous revisions may differ from page numbers in the current version.

Changes from Revision H (February 2009) to Revision I Page

• Added Pin Configuration and Functions section, ESD Ratings table, Feature Description section, Device Functional

Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device

and Documentation Support section, and Mechanical, Packaging, and Orderable Information section .............................. 1

Product Folder Links: SN65LBC184 SN75LBC184

SN65LBC184

SN75LBC184

www.ti.com

SLLS236I –OCTOBER 1996–REVISED JUNE 2015

5 Pin Configuration and Functions

D Package, P Package

8-Pin SOIC, 8-Pin PDIP

Top View

Pin Functions

I/O DESCRIPTION

NAME NO.

A 6 Bus input/output Driver output or receiver input (complementary to B)

B 7 Bus input/output Driver output or receiver input (complementary to A)

D 4 Digital input Driver data input

DE 3 Digital input Active-HIGH driver enable

GND 5 Reference potential Local device ground

R 1 Digital output Receiver data output

RE 2 Digital input Active-LOW receiver enable

8 Supply 4.75-V to 5.25-V supply

6 Specifications

6.1 Absolute Maximum Ratings

over operating free-air temperature range (unless otherwise noted)

(1)

MIN MAX UNIT

Supply voltage

(2)

–0.5 7 V

Continuous voltage range at any bus terminal –15 15 V

Data input/output voltage –0.3 7 V

Receiver output current –20 20 mA

Continuous total power dissipation

(3)

Internally Limited

stg

Storage temperature 160 °C

(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings

only, and functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating

Conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

(2) All voltage values, except differential input/output bus voltage, are with respect to network ground terminal.

(3) The driver shuts down at a junction temperature of approximately 160°C. To operate below this temperature, see the Dissipation

Ratings.

6.2 ESD Ratings

VALUE UNIT

A, B, GND ±15000

Human body model (HBM), per ANSI/ESDA/JEDEC

JS-001

(1)

All pins ±3000

Contact discharge (IEC61000-4-2) A, B, GND

(2)

±30000

Electrostatic

(ESD)

discharge

Air discharge (IEC61000-4-2) A, B, GND

(3)

±15000

All pins (Class 3A) ±8000

All pins (Class 3B) ±200

(1) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.

(2) GND and bus pin ESD protection is beyond readily available test equipment capabilities for IEC 61000-4-2, EIA/JEDEC test method

A114-A and MIL-STD-883C method 3015. Ratings listed are limits of test equipment; device performance exceeds these limits.

Product Folder Links: SN65LBC184 SN75LBC184

SN65LBC184

SN75LBC184

www.ti.com

SLLS236I –OCTOBER 1996–REVISED JUNE 2015

6.5 Electrical Characteristics: Driver

over recommended operating conditions (unless otherwise noted)

ALTERNATE

PARAMETER TEST CONDITIONS MIN TYP

(1)

MAX UNIT

SYMBOLS

DE = RE = 5 V No Load 12 25 mA

Supply current NA

DE = 0 V

No Load 175 300 μA

RE = 5 V

High-level input current

NA V

= 2.4 V 50 μA

(D, DE, RE)

Low-level input current

NA V

= 0.4 V –50 μA

(D, DE, RE)

= –7 V –250 –120

Short-circuit output

NA V

= V

250 mA

current OS

(2)

= 12 V 250

High-impedance output

NA See Receiver I

current

Output voltage V

, V

= 0 0 V

Peak-to-peak change in

common-mode output

OC(PP)

NA See Figure 9 and Figure 10 0.8 V

voltage during state

transitions

Common-mode output

| See Figure 8 1 3 V

voltage

Magnitude of change,

|ΔV

OC(SS)

| common-mode steady- |V

– V

| See Figure 10 0.1 V

state output voltage

Magnitude of I

= 0 1.5 6 V

| differential output V

= 54 Ω, See Figure 8 1.5 V

voltage |V

– V

Change in differential

Δ|V

| voltage magnitude ||V

| – |V

|| R

= 54 Ω 0.1 V

between logic states

(1) All typical values are measured with T

= 25°C and V

= 5 V.

(2) This parameter is measured with only one output being driven at a time.

6.6 Electrical Characteristics: Receiver

over recommended operation conditions (unless otherwise noted)

PARAMETER TEST CONDITIONS MIN TYP

(1)

MAX UNIT

DE = RE = 0 V, No Load 3.9 mA

Supply current (total package)

RE = 5 V, DE = 0 V, No Load 300 μA

= 12 V 250

= 12 V, V

= 0 250

Input current Other input = 0 V μA

= –7 V –200

= –7 V, V

= 0 –200

High-impedance-state output current V

= 0.4 V to 2.4 V ±100 μA

hys

Input hysteresis voltage 70 mV

IT+

Positive-going input threshold voltage 200 V

IT–

Negative-going input threshold voltage –200 mV

High-level output voltage I

= –8 mA, See Figure 11 2.8 V

Low-level output voltage I

= 4 mA, See Figure 11 0.4 V

(1) All typical values are at V

= 5 V, T

= 25°C.

Product Folder Links: SN65LBC184 SN75LBC184

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