Datasheet

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SN751177, SN751178

DUAL DIFFERENTIAL DRIVERS AND RECEIVERS

SLLS059D – FEBRUARY 1990 – REVISED MAY 1999

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

Meet or Exceed the Requirements of ANSI

Standards TIA/EIA-422-B and TIA/EIA-485-A

and ITU Recommendations V.10 and V.11

Designed for Multipoint Bus Transmission

on Long Bus Lines in Noise Environments

Driver Positive- and Negative-Current

Limiting

Thermal Shutdown Protection

Driver 3-State Outputs

Receiver Common-Mode Input Voltage

Range of –12 V to 12 V

Receiver Input Sensitivity...±200 mV

Receiver Hysteresis...50 mV Typ

Receiver Input Impedance...12kΩ Min

Receiver 3-State Outputs (SN751177 Only)

Operate From Single 5-V Supply

description

The SN751177 and SN751178 dual differential

drivers and receivers are monolithic integrated

circuits that are designed for balanced multipoint

bus transmission at rates up to 10 Mbit/s. They are

designed to improve the performance of

full-duplex data communications over long bus

lines and meet ANSI Standards TIA/EIA-422-B

and TIA/EIA-485-A and ITU Recommendations

V.10 and V.11.

The SN751177 and SN751178 driver outputs provide limiting for both positive and negative currents and

thermal-shutdown protection from line-fault conditions on the transmission bus line.

The receiver features high input impedance of at least 12 kΩ, an input sensitivity of ±200 mV over a

common-mode input voltage range of –12 V to 12 V, and typical input hysteresis of 50 mV. Fail-safe design

ensures that if the receiver inputs are open, the receiver outputs always will be high.

The SN751177 and SN751178 are characterized for operation from –20°C to 85°C.

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

SN751177 ...N OR NS

†

PACKAGE

(TOP VIEW)

†

The NS package is only available taped and reeled.

1DE

GND

2DE

SN751178 ...N OR NS

†

PACKAGE

(TOP VIEW)

Summary of content (16 pages)

PAGE 1
SN751177, SN751178 DUAL DIFFERENTIAL DRIVERS AND RECEIVERS SLLS059D – FEBRUARY 1990 – REVISED MAY 1999 D D D D D D D D D D D Meet or Exceed the Requirements of ANSI Standards TIA/EIA-422-B and TIA/EIA-485-A and ITU Recommendations V.10 and V.11 Designed for Multipoint Bus Transmission on Long Bus Lines in Noise Environments Driver Positive- and Negative-Current Limiting Thermal Shutdown Protection Driver 3-State Outputs Receiver Common-Mode Input Voltage Range of –12 V to 12 V Receiver Input Sensitivity .
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SN751177, SN751178 DUAL DIFFERENTIAL DRIVERS AND RECEIVERS SLLS059D – FEBRUARY 1990 – REVISED MAY 1999 Function Tables SN751177, SN751178 (each driver) OUTPUTS INPUT D ENABLE DE H H H L L H L H X L Z Z Y Z H = high level, L = low level, X = irrelevant, Z = high impedance (off) SN751177 (each receiver) DIFFERENTIAL INPUTS A–B ENABLE RE OUTPUT R VID ≥ 0.2 V –0.2 V < VID < 0.2 V L H L ? VID ≤ –0.
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SN751177, SN751178 DUAL DIFFERENTIAL DRIVERS AND RECEIVERS SLLS059D – FEBRUARY 1990 – REVISED MAY 1999 logic symbols† logic diagrams (positive logic) SN751177 DE 12 4 RE 1D 1R 2D 2R SN751177 EN1 DE 12 EN2 14 1 15 13 1 2 3 2 1 9 10 1 11 1 6 5 2 7 RE 1Y 4 14 1Z 1D 15 13 1A 2 1B 1R 3 1 2Y 10 2Z 2D 2A 9 11 6 2B 2R 5 7 1Y 1Z 1A 1B 2Y 2Z 2A 2B SN751178 1DE 1D 4 14 EN 15 13 2 1R 2DE 2D 2R 3 12 1 10 EN 9 11 6 5 7 SN751178 1Y 1Z 1DE 1A 1D 4 14
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SN751177, SN751178 DUAL DIFFERENTIAL DRIVERS AND RECEIVERS SLLS059D – FEBRUARY 1990 – REVISED MAY 1999 schematics of outputs TYPICAL OF ALL DRIVER OUTPUTS TYPICAL OF ALL RECEIVER OUTPUTS VCC 85 Ω NOM VCC Output Output GND All resistor values are nominal. absolute maximum ratings over operating free-air temperature range (unless otherwise noted)† Supply voltage, VCC (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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SN751177, SN751178 DUAL DIFFERENTIAL DRIVERS AND RECEIVERS SLLS059D – FEBRUARY 1990 – REVISED MAY 1999 recommended operating conditions Supply voltage, VCC High-level input voltage, VIH MIN NOM MAX UNIT 4.75 5 5.25 V 2 DE RE, RE and D inp ts DE, inputs Low-level input voltage, VIL –7† Common-mode output voltage, VOC V 0.
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SN751177, SN751178 DUAL DIFFERENTIAL DRIVERS AND RECEIVERS SLLS059D – FEBRUARY 1990 – REVISED MAY 1999 DRIVER SECTIONS electrical characteristics over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) PARAMETER VIK VOH Input clamp voltage VOL |VOD1| Low-level output voltage |VOD2| TEST CONDITIONS II = –18 mA VIH = 2 V, High-level output voltage VIH = 2 V, IO = 0 Differential output voltage Differential output voltage g VOD3 Differential output voltag
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SN751177, SN751178 DUAL DIFFERENTIAL DRIVERS AND RECEIVERS SLLS059D – FEBRUARY 1990 – REVISED MAY 1999 SYMBOL EQUIVALENTS DATA-SHEET PARAMETER TIA/EIA-422-B TIA/EIA-485-A VO Vt (RL = 100 Ω) VO Vt (RL = 54 Ω) Vt (Test Termination Measurement 2) ∆|VOD| | |Vt| – |Vt| | | |Vt| – |Vt| | VOC ∆|VOC| |VOS| |VOS| |VOS – VOS| |VOD1| |VOD2| |VOD3| |VOS – VOS| IOS IO |Isa|, |Isb| |Ixa|, |Ixb| Iia, Iib RECEIVER SECTIONS electrical characteristics over recommended ranges of common-mode input voltage, sup
PAGE 8
SN751177, SN751178 DUAL DIFFERENTIAL DRIVERS AND RECEIVERS SLLS059D – FEBRUARY 1990 – REVISED MAY 1999 switching characteristics at VCC = 5 V, CL = 15 pF, TA = 25°C PARAMETER TEST CONDITIONS tPLH tPHL Propagation delay time, low- to high-level output tPZH tPZL Output enable time to high level tPHZ tPLZ Output disable time from high level 1 5 V to 1.5 1 5 V, V VID = –1.
PAGE 9
SN751177, SN751178 DUAL DIFFERENTIAL DRIVERS AND RECEIVERS SLLS059D – FEBRUARY 1990 – REVISED MAY 1999 PARAMETER MEASUREMENT INFORMATION 3V 1.5 V Input 1.5 V 0V 2.3 V tPLH RL = 27 Ω S1 Output Generator (see Note B) 50 Ω CL = 15 pF (see Note A) 3V tPHL VOH Y Output 2.3 V 2.3 V VOL tPHL tPLH VOH Z Output 2.3 V 2.3 V VOL TEST CIRCUIT VOLTAGE WAVEFORMS NOTES: A. CL includes probe and jig capacitance. B.
PAGE 10
SN751177, SN751178 DUAL DIFFERENTIAL DRIVERS AND RECEIVERS SLLS059D – FEBRUARY 1990 – REVISED MAY 1999 PARAMETER MEASUREMENT INFORMATION 3V Output Generator (see Note B) 50 Ω 1.5 V Input 0V tPLH CL = 15 pF (see Note A) 1.5 V 1.5 V 0V tPHL 1.3 V Output VOH 1.3 V VOL TEST CIRCUIT VOLTAGE WAVEFORMS NOTES: A. CL includes probe and jig capacitance. B. The pulse generator has the following characteristics: PRR ≤ 1 MHz, 50% duty cycle, ZO = 50 Ω, tr ≤ 6 ns, tf ≤ 6 ns. Figure 7.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE MATERIALS INFORMATION www.ti.com 11-Mar-2008 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel Diameter Width (mm) W1 (mm) A0 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant SN751177NSR SO NS 16 2000 330.0 16.4 8.2 10.5 2.5 12.0 16.0 Q1 SN751178NSR SO NS 16 2000 330.0 16.4 8.2 10.5 2.5 12.0 16.
PAGE 13
PACKAGE MATERIALS INFORMATION www.ti.com 11-Mar-2008 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) SN751177NSR SO NS 16 2000 346.0 346.0 33.0 SN751178NSR SO NS 16 2000 346.0 346.0 33.
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