SN75LBC179, SN65LBC179, SN65LBC179Q LOW-POWER DIFFERENTIAL LINE DRIVER AND RECEIVER PAIRS SLLS173C – JANUARY 1994 – REVISED JANUARY 2000 D D D D D D D D Designed for High-Speed Multipoint Data Transmission Over Long Cables Operate With Pulse Widths as Low as 30 ns Low Supply Current . . . 5 mA Max Meets or Exceeds the Standard Requirements of ANSI RS-485 and ISO 8482:1987(E) Common-Mode Voltage Range of – 7 V to 12 V Positive- and Negative-Output Current Limiting Driver Thermal Shutdown Protection Pin Compatible With the SN75179B D OR P PACKAGE (TOP VIEW) VCC R D GND The SN65LBC179, SN65LBC179Q, and SN75LBC179 combine a differential line driver and differential 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 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 line driver shuts down at a junction temperature of approximately 172°C. 8 2 7 3 6 4 5 A B Z Y Function Tables DRIVER INPUT D H L OUTPUTS Y Z H L L H RECEIVER description The SN65LBC179, SN65LBC179Q, and SN75LBC179 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 meet or exceed the requirements of industry standards ANSI RS-485 and ISO 8482:1987(E). Both devices are designed using TI’s proprietary LinBiCMOS with the low power consumption of CMOS and the precision and robustness of bipolar transistors in the same circuit. 1 DIFFERENTIAL INPUTS OUTPUT A–B R VID ≥ 0.2 V H – 0.2 V < VID < 0.2 V ? L VID ≤ – 0.2 V H Open circuit H = high level, ? = indeterminate L = low level, logic symbol† R D 8 2 7 6 3 5 A B Z Y † This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. logic diagram (positive logic) R D 2 3 8 7 5 6 A B Y Z 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. LinBiCMOS is a trademark of Texas Instruments Incorporated. Copyright 2000, Texas Instruments Incorporated 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. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 1 SN75LBC179, SN65LBC179, SN65LBC179Q LOW-POWER DIFFERENTIAL LINE DRIVER AND RECEIVER PAIRS SLLS173C – JANUARY 1994 – REVISED JANUARY 2000 description (continued) The SN65LBC179, SN65LBC179Q, and SN75LBC179 are available in the 8-pin dual-in-line and small-outline packages. The SN75LBC179 is characterized for operation over the commercial temperature range of 0°C to 70°C. The SN65LBC179 is characterized over the industrial temperature range of – 40°C to 85°C. The SN65LBC179Q is characterized over the extended industrial or automotive temperature range of – 40°C to 125°C. schematics of inputs and outputs EQUIVALENT OF DRIVER INPUT RECEIVER A INPUT RECEIVER B INPUT VCC VCC VCC 100 kΩ NOM 22 kΩ 3 kΩ NOM 3 kΩ NOM 18 kΩ NOM Input 18 kΩ NOM Input Input 12 kΩ 12 kΩ 1.1 kΩ NOM DRIVER OUTPUT 100 kΩ NOM 1.1 kΩ NOM TYPICAL OF RECEIVER OUTPUT VCC VCC R Output Output 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 SN75LBC179, SN65LBC179, SN65LBC179Q LOW-POWER DIFFERENTIAL LINE DRIVER AND RECEIVER PAIRS SLLS173C – JANUARY 1994 – REVISED JANUARY 2000 absolute maximum ratings over operating free-air temperature range (unless otherwise noted)† Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.3 V to 7 V Voltage range at A, B, Y, or Z (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 10 V to 15 V Voltage range at D or R (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.3 V to VCC + 0.5 V Continuous total power dissipation (see Note 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Internally limited Total power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Dissipation Rating Table Operating free-air temperature range, TA: SN65LBC179 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 40°C to 85°C SN65LBC179Q . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 40°C to 125°C SN75LBC179 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 65°C to 150°C Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C † 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. NOTES: 1. All voltage values are with respect to GND. 2. The maximum operating junction temperature is internally limited. Uses the dissipation rating table to operate below this temperature. DISSIPATION RATING TABLE PACKAGE TA ≤ 25°C POWER RATING DERATING FACTOR ABOVE TA = 25°C TA = 70°C POWER RATING TA = 85°C POWER RATING D 725 mW 5.8 mW/°C 464 mW 377 mW P 1100 mW 8.8 mW/°C 704 mW 572 mW recommended operating conditions Supply voltage, VCC High-level input voltage, VIH D Low-level input voltage, VIL D Differential input voltage, VID Voltage at any bus terminal (separately or common-mode), VO, VI, or VIC A, B, Y, or Z MIN NOM MAX UNIT 4.75 5 5.25 V 2 V – 6‡ 6 V –7 12 V Y or Z High level output current, High-level current IOH Low level output current Low-level current, IOL – 60 R –8 Y or Z 60 R Operating free-air temperature, TA V 0.8 8 SN65LBC179 – 40 85 SN65LBC179Q – 40 125 0 70 SN75LBC179 mA mA °C ‡ The algebraic convention, in which the least positive (most negative) limit is designated as minimum, is used in this data sheet for differential input voltage, voltage at any bus terminal (separately or common mode), operating temperature, input threshold voltage, and common-mode output voltage. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 3 SN75LBC179, SN65LBC179, SN65LBC179Q LOW-POWER DIFFERENTIAL LINE DRIVER AND RECEIVER PAIRS SLLS173C – JANUARY 1994 – REVISED JANUARY 2000 DRIVER SECTION electrical characteristics over recommended operating conditions (unless otherwise noted) PARAMETER VIK TEST CONDITIONS Input clamp voltage TYP† II = – 18 mA RL = 54 Ω, See Figure 1 | VOD | MIN Differential output voltage (see Note 3) RL = 60 Ω, See Figure 2 UNIT – 1.5 V SN65LBC179, SN65LBC179Q 1.1 2.2 5 SN75LBC179 1.5 2.2 5 SN65LBC179, SN65LBC179Q 1.1 2.2 5 SN75LBC179 1.5 2.2 5 ∆| VOD | Change in magnitude of differential output voltage (see Note 4) VOC Common-mode output voltage ∆| VOC | Change in magnitude of common-mode output voltage (see Note 4) RL = 54 Ω, See Figure 1 IO IIH Output current with power off VCC = 0, VI = 2.4 V VO = – 7 V to 12 V IIL IOS Low-level input current Short-circuit output current VI = 0.4 V – 7 V ≤ VO ≤ 12 V ICC y current Supply No load High-level input current MAX See Figures 1 and 2 1 SN65LBC179, SN75LBC179 2.5 4.2 V ± 0.2 V 3 V ± 0.2 V ± 100 µA – 100 µA – 100 µA ± 250 mA 5 mA SN65LBC179Q 4.2 7 mA † All typical values are at VCC = 5 V and TA = 25°C. NOTES: 3. The minimum VOD specification of the SN65179 may not fully comply with ANSI RS-485 at operating temperatures below 0°C. System designers should take the possibly lower output signal into account in determining the maximum signal transmission distance. 4. ∆ | VOD | and ∆ | VOC | are the changes in the steady-state magnitude of VOD and VOC, respectively, that occur when the input is changed from a high level to a low level. switching characteristics, VCC = 5 V, TA = 25°C PARAMETER td(OD) tt(OD) 4 TEST CONDITIONS Differential-output delay time RL = 54 Ω Ω, Differential transition time POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 See Figure 3 MIN MAX UNIT 7 18 ns 5 20 ns SN75LBC179, SN65LBC179, SN65LBC179Q LOW-POWER DIFFERENTIAL LINE DRIVER AND RECEIVER PAIRS SLLS173C – JANUARY 1994 – REVISED JANUARY 2000 RECEIVER SECTION electrical characteristics over recommended operating conditions (unless otherwise noted) PARAMETER TEST CONDITIONS VIT + VIT – Positive-going input threshold voltage Vhys VOH Hysteresis voltage ( VIT + – VIT –) VOL Low-level output voltage II MIN IO = – 8 mA IO = 8 mA Negative-going input threshold voltage TYP MAX 0.2 – 0.2 VID = 200 mV, VID = – 200 mV, Bus input current IOH = – 8 mA IOL = 16 mA 3.5 V V 45 High-level output voltage UNIT mV 4.5 V 0.3 0.5 V VI = 12 V, Other inputs at 0 V, VCC = 5 V SN65LBC179, SN75LBC179 0.7 1 mA SN65LBC179Q 0.7 1.2 mA VI = 12 V, Other inputs at 0 V, VCC = 0 V SN65LBC179, SN75LBC179 0.8 1 mA SN65LBC179Q 0.8 1 .2 mA VI = – 7 V, Other inputs at 0 V, VCC = 5 V SN65LBC179, SN75LBC179 – 0.5 – 0.8 mA SN65LBC179Q – 0.5 – 1.0 mA VI = – 7 V, Other inputs at 0 V, VCC = 0 V SN65LBC179, SN75LBC179 – 0.5 – 0.8 mA SN65LBC179Q – 0.5 – 1.0 mA TYP MAX UNIT switching characteristics, VCC = 5 V, TA = 25°C PARAMETER TEST CONDITIONS tPHL tPLH Propagation delay time, high- to low-level output tsk(p) tt Pulse skew ( tPHL – tPLH ) Propagation delay time, low- to high-level output VID = –1.5 1 5 V to 1.5 1 5 V, V MIN See Figure 4 15 15 See Figure 4 Transition time 30 ns 30 ns 3 6 ns 3 5 ns PARAMETER MEASUREMENT INFORMATION Y RL 2 D VOD 0 V or 3 V RL 2 VOC Z Figure 1. Differential and Common-Mode Output Voltage Test Circuit POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 5 SN75LBC179, SN65LBC179, SN65LBC179Q LOW-POWER DIFFERENTIAL LINE DRIVER AND RECEIVER PAIRS SLLS173C – JANUARY 1994 – REVISED JANUARY 2000 PARAMETER MEASUREMENT INFORMATION Vtest R1 375 Ω Y D RL = 60 Ω 0 V or 3 V VOD Z R2 375 Ω – 7 V < Vtest < 12 V Vtest Figure 2. Differential Output Voltage Test Circuit 3V Input Generator (see Note A) RL = 54 Ω 50 Ω 1.5 V 1.5 V 0V td(ODL) ≈ 2.5 V 50% ≈ – 2.5 V td(ODH) CL = 50 pF Output (see Note B) 50% Output tt(OD) TEST CIRCUIT tt(OD) VOLTAGE WAVEFORMS Figure 3. Driver Test Circuits and Differential Output Delay and Transition Time Voltage Waveforms 3V Input 1.5 V A Generator (see Note A) 50 Ω 1.5 V 0V Output B tPLH tPHL 1.5 V CL = 15 pF (see Note B) Output 90% 1.3 V 10% tt TEST CIRCUIT VOH 90% 1.3 V 10% VOL tt VOLTAGE WAVEFORMS Figure 4. Receiver Test Circuit and Propagation Delay and Transition Time 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. CL includes probe and jig capacitance. 6 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 SN75LBC179, SN65LBC179, SN65LBC179Q LOW-POWER DIFFERENTIAL LINE DRIVER AND RECEIVER PAIRS SLLS173C – JANUARY 1994 – REVISED JANUARY 2000 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 0.5 4 3.5 3 2.5 2 1.5 1 0.5 0 0 0 10 20 30 40 50 60 70 80 90 100 IOH – High-Level Output Current – mA 0 20 40 60 80 100 IOL – Low-Level Output Current – mA Figure 5 Figure 6 DRIVER DRIVER DIFFERENTIAL OUTPUT VOLTAGE vs OUTPUT CURRENT DIFFERENTIAL OUTPUT VOLTAGE vs FREE-AIR TEMPERATURE 4 3 VCC = 5 V TA = 25°C VOD – Differential Output Voltage – V VOD – Differential Output Voltage – V 3.5 3 2.5 2 1.5 1 0.5 0 120 0 10 20 30 40 50 60 70 80 IO – Output Current – mA 90 100 2.5 VCC = 5 V Load = 54 Ω VIH = 2 V 2 1.5 1 0.5 0 – 50 – 25 Figure 7 0 25 50 75 100 TA – Free-Air Temperature – °C 125 Figure 8 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 7 SN75LBC179, SN65LBC179, SN65LBC179Q LOW-POWER DIFFERENTIAL LINE DRIVER AND RECEIVER PAIRS SLLS173C – JANUARY 1994 – REVISED JANUARY 2000 TYPICAL CHARACTERISTICS DRIVER RECEIVER DIFFERENTIAL DELAY TIME vs FREE-AIR TEMPERATURE HIGH-LEVEL OUTPUT VOLTAGE vs HIGH-LEVEL OUTPUT CURRENT 6 20 VID = 200 mV td(ODL) VOH – High-Level Output Voltage – V t d(OD) – Differential Delay Times – ns VCC = 5 V Load = 54 Ω 15 td(ODH) 10 5 0 – 50 5 4 3 2 1 0 – 25 100 50 75 0 25 TA – Free-Air Temperature – °C 125 0 – 40 –10 – 20 – 30 IOH – High-Level Output Current – mA Figure 9 Figure 10 RECEIVER RECEIVER LOW-LEVEL OUTPUT VOLTAGE vs LOW-LEVEL OUTPUT CURRENT OUTPUT VOLTAGE vs DIFFERENTIAL INPUT VOLTAGE 1 6 VCC = 5 V TA = 25°C VID = – 200 mV 0.8 5 VIC = 12 V 0.7 4 VO – Output Voltage – V VOL – Low-Level Output Voltage – V 0.9 0.6 0.5 0.4 0.3 0.2 VIC = 0 V 3 2 VIC = –7 V 1 0.1 0 0 5 10 15 20 25 35 30 IOL – Low-Level Output Current – mA 40 0 – 80 – 60 – 40 – 20 0 Figure 12 POST OFFICE BOX 655303 20 40 60 VID – Differential Input Voltage – mV Figure 11 8 – 50 • DALLAS, TEXAS 75265 80 SN75LBC179, SN65LBC179, SN65LBC179Q LOW-POWER DIFFERENTIAL LINE DRIVER AND RECEIVER PAIRS SLLS173C – JANUARY 1994 – REVISED JANUARY 2000 TYPICAL CHARACTERISTICS RECEIVER INPUT CURRENT vs INPUT VOLTAGE (COMPLEMENTARY INPUT AT 0 V) AVERAGE SUPPLY CURRENT vs FREQUENCY 60 1 Receiver Load = 50 pF Driver Load = Receiver Inputs 0.8 50 0.6 45 0.4 I I – Input Current – mA 40 35 30 25 20 15 10 0 10 K 0.2 0 – 0.2 – 0.4 – 0.6 – 0.8 5 100 K 1M 10 M ÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎÎÎÎÎ TA = 25°C VCC = 5 V The shaded region of this graph represents more than 1 unit load per RS-485. –1 –8 100 M –6 –4 –2 0 2 4 6 8 10 12 VI – Input Voltage – V f – Frequency – Hz Figure 13 Figure 14 RECEIVER PROPAGATION DELAY TIME vs FREE-AIR TEMPERATURE 24.5 t pd – Propagation Delay Time – ns I CC – Average Supply Current – mA 55 VCC = 5 V CL = 15 pF VIO = ± 1.5 V 24 tPHL 23.5 23 tPLH 22.5 22 – 40 – 20 0 20 40 60 80 100 TA – Free-Air Temperature – °C Figure 15 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 9 SN75LBC179, SN65LBC179, SN65LBC179Q LOW-POWER DIFFERENTIAL LINE DRIVER AND RECEIVER PAIRS SLLS173C – JANUARY 1994 – REVISED JANUARY 2000 MECHANICAL INFORMATION D (R-PDSO-G**) PLASTIC SMALL-OUTLINE PACKAGE 14 PIN SHOWN PINS ** 0.050 (1,27) 8 14 16 A MAX 0.197 (5,00) 0.344 (8,75) 0.394 (10,00) A MIN 0.189 (4,80) 0.337 (8,55) 0.386 (9,80) DIM 0.020 (0,51) 0.014 (0,35) 14 0.010 (0,25) M 8 0.244 (6,20) 0.228 (5,80) 0.008 (0,20) NOM 0.157 (4,00) 0.150 (3,81) 1 Gage Plane 7 A 0.010 (0,25) 0°– 8° 0.044 (1,12) 0.016 (0,40) Seating Plane 0.069 (1,75) MAX 0.010 (0,25) 0.004 (0,10) 0.004 (0,10) 4040047 / D 10/96 NOTES: A. B. C. D. 10 All linear dimensions are in inches (millimeters). This drawing is subject to change without notice. Body dimensions do not include mold flash or protrusion, not to exceed 0.006 (0,15). Falls within JEDEC MS-012 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 SN75LBC179, SN65LBC179, SN65LBC179Q LOW-POWER DIFFERENTIAL LINE DRIVER AND RECEIVER PAIRS SLLS173C – JANUARY 1994 – REVISED JANUARY 2000 MECHANICAL INFORMATION P (R-PDIP-T8) PLASTIC DUAL-IN-LINE 0.400 (10,60) 0.355 (9,02) 8 5 0.260 (6,60) 0.240 (6,10) 1 4 0.070 (1,78) MAX 0.325 (8,26) 0.300 (7,62) 0.020 (0,51) MIN 0.015 (0,38) Gage Plane 0.200 (5,08) MAX Seating Plane 0.010 (0,25) NOM 0.125 (3,18) MIN 0.100 (2,54) 0.021 (0,53) 0.015 (0,38) 0.430 (10,92) MAX 0.010 (0,25) M 4040082/D 05/98 NOTES: A. All linear dimensions are in inches (millimeters). B. This drawing is subject to change without notice. C. Falls within JEDEC MS-001 For the latest package information, go to http://www.ti.com/sc/docs/package/pkg_info.htm POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 11 IMPORTANT NOTICE Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those pertaining to warranty, patent infringement, and limitation of liability. TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily performed, except those mandated by government requirements. CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL APPLICATIONS”). TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED, AUTHORIZED, OR WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT DEVICES OR SYSTEMS OR OTHER CRITICAL APPLICATIONS. INCLUSION OF TI PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO BE FULLY AT THE CUSTOMER’S RISK. In order to minimize risks associated with the customer’s applications, adequate design and operating safeguards must be provided by the customer to minimize inherent or procedural hazards. TI assumes no liability for applications assistance or customer product design. TI does not warrant or represent that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other intellectual property right of TI covering or relating to any combination, machine, or process in which such semiconductor products or services might be or are used. TI’s publication of information regarding any third party’s products or services does not constitute TI’s approval, warranty or endorsement thereof. Copyright 2000, Texas Instruments Incorporated