Datasheet

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SN75179B

DIFFERENTIAL DRIVER AND RECEIVER PAIR

SLLS003E – OCTOBER 1985 – REVISED JUNE 1998

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

Meets or Exceeds the Requirements of

TIA/EIA-422-B, TIA/EIA-485-A, and ITU

Recommendation V.11

Bus Voltage Range...–7 V to 12 V

Positive- and Negative-Current Limiting

Driver Output Capability...60 mA Max

Driver Thermal-Shutdown Protection

Receiver Input Impedance...12 kΩ Min

Receiver Input Sensitivity...±200 mV

Receiver Input Hysteresis...50 mV Typ

Operates From Single 5-V Supply

Low Power Requirements

description

The SN75179B is a differential driver and receiver pair designed for balanced transmission-line applications

and meets TIA/EIA-422-B, TIA/EIA-485-A, and ITU Recommendation V.11. It is designed to improve the

performance of full-duplex data communications over long bus lines.

The SN75179B driver output provides limiting for both positive and negative currents. The receiver features high

input impedance, input hysteresis for increased noise immunity, and input sensitivity of ±200 mV over a

common-mode input voltage range of –7 V to 12 V. The driver provides thermal shutdown for protection from

line fault conditions. Thermal shutdown is designed to occur at a junction temperature of approximately 150°C.

The SN75179B is designed to drive current loads of up to 60 mA maximum.

The SN75179B is characterized for operation from 0°C to 70°C.

Function Tables

DRIVER

INPUT

OUTPUTS

Y Z

H H L

L L H

RECEIVER

DIFFERENTIAL INPUTS

OUTPUT

A – B R

≥ 0.2 V H

–0.2 V < V

< 0.2 V ?

≤ –0.2 V L

Open ?

H = high level, L = low level, ? = indeterminate

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

GND

D OR P PACKAGE

(TOP VIEW)

Summary of content (17 pages)

PAGE 1
SN75179B DIFFERENTIAL DRIVER AND RECEIVER PAIR SLLS003E – OCTOBER 1985 – REVISED JUNE 1998 D D D D D D D D D D D OR P PACKAGE (TOP VIEW) Meets or Exceeds the Requirements of TIA/EIA-422-B, TIA/EIA-485-A, and ITU Recommendation V.11 Bus Voltage Range . . . – 7 V to 12 V Positive- and Negative-Current Limiting Driver Output Capability . . . 60 mA Max Driver Thermal-Shutdown Protection Receiver Input Impedance . . . 12 kΩ Min Receiver Input Sensitivity . . . ± 200 mV Receiver Input Hysteresis . . .
PAGE 2
SN75179B DIFFERENTIAL DRIVER AND RECEIVER PAIR SLLS003E – OCTOBER 1985 – REVISED JUNE 1998 logic symbol† logic diagram (positive logic) 8 2 7 R 6 3 5 D 8 A B R 2 7 A B Z 6 Y D 3 5 † This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
PAGE 3
SN75179B DIFFERENTIAL DRIVER AND RECEIVER PAIR SLLS003E – OCTOBER 1985 – REVISED JUNE 1998 absolute maximum ratings over operating free-air temperature range (unless otherwise noted)† Supply voltage, VCC (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V Voltage range at any bus terminal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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SN75179B DIFFERENTIAL DRIVER AND RECEIVER PAIR SLLS003E – OCTOBER 1985 – REVISED JUNE 1998 DRIVER SECTION electrical characteristics over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) PARAMETER TEST CONDITIONS VIK Input clamp voltage II = - 18 mA VO VOD1  Output voltage IO = 0 Differential output voltage IO = 0 VOD2  g Differential output voltage VOD3  Differential output voltage ∆VOD  Change in magnitude of common-mode output voltag
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SN75179B DIFFERENTIAL DRIVER AND RECEIVER PAIR SLLS003E – OCTOBER 1985 – REVISED JUNE 1998 RECEIVER SECTION electrical characteristics over recommended ranges of common-mode input voltage, supply voltage, and operating free-air temperature (unless otherwise noted) PARAMETER TEST CONDITIONS VIT + VIT – Positive-going input threshold voltage Vhys VOH Hysteresis voltage (VIT + – VIT –) VOL Low-level output voltage Negative-going input threshold voltage High-level output voltage II Line input current
PAGE 6
SN75179B DIFFERENTIAL DRIVER AND RECEIVER PAIR SLLS003E – OCTOBER 1985 – REVISED JUNE 1998 PARAMETER MEASUREMENT INFORMATION (CONTINUED) 3V Input RL = 54 Ω Generator (see Note A) 50 Ω CL = 50 pF (see Note B) Output 1.5 V 1.5 V 0V td(OD) Output td(OD) 90% 10% 50% ≈ 2.5 V 50% ≈ – 2.5 V tt(OD) tt(OD) TEST CIRCUIT VOLTAGE WAVEFORMS NOTES: A. The input pulse is supplied by a generator having the following characteristics: PRR ≤ 1 MHz, 50% duty cycle, tr ≤ 6 ns, tf ≤ 6 ns, ZO = 50 Ω. B.
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SN75179B DIFFERENTIAL DRIVER AND RECEIVER PAIR SLLS003E – OCTOBER 1985 – REVISED JUNE 1998 TYPICAL CHARACTERISTICS DRIVER DRIVER HIGH-LEVEL OUTPUT VOLTAGE vs HIGH-LEVEL OUTPUT CURRENT LOW-LEVEL OUTPUT VOLTAGE vs LOW-LEVEL OUTPUT CURRENT 5 VCC = 5 V TA = 25°C 4.5 VCC = 5 V TA = 25°C 4.5 VOL – Low-Level Output Voltage – V VOH – High-Level Output Voltage – V 5 4 3.5 3 2.5 2 1.5 1 4 3.5 3 2.5 2 1.5 1 0.5 0.
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SN75179B DIFFERENTIAL DRIVER AND RECEIVER PAIR SLLS003E – OCTOBER 1985 – REVISED JUNE 1998 TYPICAL CHARACTERISTICS HIGH-LEVEL OUTPUT VOLTAGE vs FREE-AIR TEMPERATURE HIGH-LEVEL OUTPUT VOLTAGE vs HIGH-LEVEL OUTPUT CURRENT 5 5 VID = 0.2 V TA = 25°C 4 3.5 3 VCC = 5.25 V 2.5 VCC = 5 V 2 1.5 1 VCC = 5 V VID = 0.2 V IOH = – 440 µA 4.5 VOH – High-Level Output Voltage – V VOH – High-Level Output Voltage – V 4.5 VCC = 4.75 V 4 3.5 3 2.5 2 1.5 1 0.5 0.
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PACKAGE OPTION ADDENDUM www.ti.
PAGE 10
PACKAGE OPTION ADDENDUM www.ti.com 4-Jun-2007 to Customer on an annual basis.
PAGE 11
PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant SN75179BDR SOIC D 8 2500 330.0 12.4 6.4 5.2 2.1 8.0 12.0 Q1 SN75179BPSR SO PS 8 2000 330.0 16.4 8.2 6.6 2.5 12.0 16.
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PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) SN75179BDR SN75179BPSR SOIC D 8 2500 340.5 338.1 20.6 SO PS 8 2000 367.0 367.0 38.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.