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GND

SN65LBC179AD (Marked as BL179A)

SN65LBC179AP (Marked as 65LBC179A)

SN75LBC179AD (Marked as LB179A)

SN75LBC179AP (Marked as 75LBC179A)

(TOP VIEW)

SN65LBC179A

SN75LBC179A

www.ti.com

SLLS377D –MAY 2000– REVISED SEPTEMBER 2011

LOW-POWER DIFFERENTIAL LINE DRIVER AND RECEIVER PAIRS

Check for Samples: SN65LBC179A, SN75LBC179A

FEATURES

• High-Speed Low-Power LinBiCMOS™ Circuitry

Designed for Signaling Rates

(1)

of up to 30

Mbps

• Bus-Pin ESD Protection Exceeds 12 kV HBM

• Very Low Disabled Supply-Current

Requirements . . . 700 μA Max

• Common-Mode Voltage Range of –7 V to 12 V

• Low Supply Current . . .15 mA Max

• Compatible With ANSI Standard TIA/EAI-485-A

and ISO8482: 1987(E)

LOGIC DIAGRAM (POSITIVE LOGIC)

• Positive and Negative Output Current Limiting

• Driver Thermal Shutdown Protection

(1)

Signaling rate by TIA/EIA-485-A definition restrict transition times

to 30% of the bit length, and much higher signaling rates may be

achieved without this requirement as displayed in the TYPICAL

CHARACTERISTICS of this device.

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 (V

= 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.

FUNCTION TABLE

(1)

DRIVER RECEIVER

DIFFERENTIAL INPUTS OUTPUT

OUTPUTS

INPUT

A – B R

Y Z V

≥ 0.2 V H

H H L -0.2 V < V

< 0.2 V ?

L L H V

≤ -0.2 V L

OPEN H L Open circuit H

(1) H = high level, L = low level, ? = indeterminate

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.

2LinBiCMOS is a trademark of Texas Instruments.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

Summary of content (18 pages)

PAGE 1
SN65LBC179A SN75LBC179A SLLS377D – MAY 2000 – REVISED SEPTEMBER 2011 www.ti.com LOW-POWER DIFFERENTIAL LINE DRIVER AND RECEIVER PAIRS Check for Samples: SN65LBC179A, SN75LBC179A FEATURES 1 • 2 • • • • • • • High-Speed Low-Power LinBiCMOS™ Circuitry Designed for Signaling Rates(1) of up to 30 Mbps Bus-Pin ESD Protection Exceeds 12 kV HBM Very Low Disabled Supply-Current Requirements . . . 700 μA Max Common-Mode Voltage Range of –7 V to 12 V Low Supply Current . . .
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SN65LBC179A SN75LBC179A SLLS377D – MAY 2000 – REVISED SEPTEMBER 2011 www.ti.com These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.
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SN65LBC179A SN75LBC179A SLLS377D – MAY 2000 – REVISED SEPTEMBER 2011 www.ti.com ABSOLUTE MAXIMUM RATINGS (1) over operating free-air temperature range (unless otherwise noted) UNIT VCC Supply voltage range (2) Voltage range IO –0.3 V to 6 V A, B, Y, or Z (2) –10 V to 15 V D or R (2) –0.3 V to VCC + 0.
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SN65LBC179A SN75LBC179A SLLS377D – MAY 2000 – REVISED SEPTEMBER 2011 www.ti.com DRIVER ELECTRICAL CHARACTERISTICS over recommended operating conditions (unless otherwise noted) PARAMETER VIK II = –18 mA Input clamp voltage Differential output voltage MAX –1.5 –0.8 SN65LBC179A 1 1.5 3 SN75LBC179A 1.1 1.5 3 RL = 60 Ω, –7
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SN65LBC179A SN75LBC179A SLLS377D – MAY 2000 – REVISED SEPTEMBER 2011 www.ti.
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SN65LBC179A SN75LBC179A SLLS377D – MAY 2000 – REVISED SEPTEMBER 2011 www.ti.com PARAMETER MEASURMENT INFORMATION (continued) 3V Input Generator (see Note A) RL = 54 Ω 50 Ω 1.5 V CL = 50 pF (see Note B) 1.5 V 0V tPLH Output Output tPHL 50% ≈ 1.5 V 50% 90% 10% ≈ − 1.5 V tf tr TEST CIRCUIT VOLTAGE WAVEFORMS 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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SN65LBC179A SN75LBC179A SLLS377D – MAY 2000 – REVISED SEPTEMBER 2011 www.ti.com TYPICAL CHARACTERISTICS Receiver Output Driver Input 120 Ω 120 Ω Driver Input Receiver Output Figure 5.
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SN65LBC179A SN75LBC179A SLLS377D – MAY 2000 – REVISED SEPTEMBER 2011 www.ti.com TYPICAL CHARACTERISTICS (continued) LOW-LEVEL OUTPUT VOLTAGE vs LOW-LEVEL OUTPUT CURRENT 800 2.00 600 1.75 VOL − Low-Level Output Voltage − V II − Input Current − µ A INPUT CURRENT vs INPUT VOLTAGE 400 200 0 −200 Bus Input Current −400 VCC = 5 1.50 1.25 1.00 0.75 0.50 0.25 −600 −8 0.
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SN65LBC179A SN75LBC179A SLLS377D – MAY 2000 – REVISED SEPTEMBER 2011 www.ti.com TYPICAL CHARACTERISTICS (continued) RECEIVER PROPAGATION TIME vs CASE TEMPERATURE DRIVER PROPAGATION DELAY TIME vs CASE TEMPERATURE 13.8 7.4 TPHL − Driver Propagation Delay Time − ns T PHL − Receiver Propagation Time − ns 13.7 13.6 13.5 13.4 13.3 13.2 13.1 13 12.9 −40 0 25 70 80 7.2 7 6.8 6.6 6.4 6.2 6 5.8 5.6 Case Temperature °C −40 0 25 70 85 Case Temperature − °C Figure 12. Figure 13.
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SN65LBC179A SN75LBC179A SLLS377D – MAY 2000 – REVISED SEPTEMBER 2011 www.ti.com REVISION HISTORY Changes from Revision C (June 2001) to Revision D Page • Changed the D Output and R Output schematins ................................................................................................................ 2 • Added Receiver output current to the Abs Max Table ..........................................................................................................
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 18-Jul-2006 In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
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PACKAGE MATERIALS INFORMATION www.ti.com 5-May-2010 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 SN65LBC179ADR SOIC D 8 2500 330.0 12.4 6.4 5.2 2.1 8.0 12.0 Q1 SN75LBC179ADR SOIC D 8 2500 330.0 12.4 6.4 5.2 2.1 8.0 12.
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PACKAGE MATERIALS INFORMATION www.ti.com 5-May-2010 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) SN65LBC179ADR SOIC D 8 2500 340.5 338.1 20.6 SN75LBC179ADR SOIC D 8 2500 340.5 338.1 20.
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