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2 Bidirectional Transceivers Meet or Exceed the Requirements of ANSI Standards TIA/EIA-4-B and TIA/EIA-485-A and ITU Recommendations V. and X.7 Designed for Multipoint Transmission on Long Bus Lines in Noisy Environments -State Driver and Receiver s Individual Driver and Receiver Enables Wide Positive and Negative Input/ Bus Voltage Ranges Driver Capability... ±6 ma Max Thermal Shutdown Protection Driver Positive and Negative Current Limiting Receiver Input Impedance... kω Min Receiver Input Sensitivity... ± mv Receiver Input Hysteresis... 5 mv Typ Operate From Single 5-V Supply SLLSD JULY 985 REVISED APRIL SN6576B...D OR P PACKAGE SN7576B... D, P, OR PS PACKAGE (TOP VIEW) R RE DE D V CC B A GND description/ordering information The SN6576B and SN7576B differential bus transceivers are integrated circuits designed for bidirectional data communication on multipoint bus transmission lines. They are designed for balanced transmission lines and meet ANSI Standards TIA/EIA-4-B and TIA/EIA-485-A and ITU Recommendations V. and X.7. The SN6576B and SN7576B combine a -state differential line driver and a differential input line receiver, both of which operate from a single 5-V power supply. The driver and receiver have active-high and active-low enables, respectively, that can be connected together externally to function as a direction control. The driver differential outputs and the receiver differential inputs are connected internally to form differential input/output (I/O) bus ports that are designed to offer minimum loading to the bus when the driver is disabled or V CC =. These ports feature wide positive and negative common-mode voltage ranges, making the device suitable for party-line applications. TA ORDERING INFORMATION PACKAGE ORDERABLE PART NUMBER TOP-SIDE MARKING PDIP (P) Tube of 5 SN7576BP SN7576BP C to 7 C SOIC (D) Tube of 75 SN7576BD Reel of 5 SN7576BDR 7576B SOP (PS) Reel of SN7576BPSR A76B PDIP (P) Tube of 5 SN6576BP SN6576BP 4 C to 5 C Tube of 75 SN6576BD SOIC (D) Reel of 5 SN6576BDR 6576B Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at 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. 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. Copyright, Texas Instruments Incorporated On products compliant to MIL-PRF-855, all parameters are tested unless otherwise noted. On all other products, production processing does not necessarily include testing of all parameters. POST OFFICE BOX 655 DALLAS, TEXAS 7565

3 SLLSD JULY 985 REVISED APRIL description/ordering information (continued) The driver is designed for up to 6 ma of sink or source current. The driver features positive and negative current limiting and thermal shutdown for protection from line-fault conditions. Thermal shutdown is designed to occur at a junction temperature of approximately 5 C. The receiver features a minimum input impedance of kω, an input sensitivity of ± mv, and a typical input hysteresis of 5 mv. The SN6576B and SN7576B can be used in transmission-line applications employing the SN757 and SN7574 quadruple differential line drivers and SN757 and SN7575 quadruple differential line receivers. Function Tables DRIVER INPUT ENABLE OUTPUTS D DE A B H H H L L H L H X L Z Z logic diagram (positive logic) RECEIVER DIFFERENTIAL INPUTS ENABLE OUTPUT A B RE R VID. V L H. V < VID <. V L? VID. V L L X H Z Open L? H = high level, L = low level,? = indeterminate, X = irrelevant, Z = high impedance (off) DE D 4 RE R 6 7 A B Bus POST OFFICE BOX 655 DALLAS, TEXAS 7565

4 SLLSD JULY 985 REVISED APRIL schematics of inputs and outputs EQUIVALENT OF EACH INPUT TYPICAL OF A AND B I/O PORTS TYPICAL OF RECEIVER OUTPUT VCC R(eq) VCC VCC 85 Ω NOM Input 6.8 kω NOM 96 Ω NOM 96 Ω NOM Driver input: R(eq) = kω NOM Enable inputs: R(eq )= 8 kω NOM R(eq) = Equivalent Resistor Input/ Port GND absolute maximum ratings over operating free-air temperature range (unless otherwise noted) Supply voltage, V CC (see Note ) V Voltage range at any bus terminal V to 5 V Enable input voltage, V I V Package thermal impedance, θ JA (see Notes and ): D package C/W P package C/W PS package C/W Operating virtual junction temperature, T J C Lead temperature,6 mm (/6 inch) from case for seconds C Storage temperature range, T stg C to 5 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:. All voltage values, except differential input/output bus voltage, are with respect to network ground terminal.. Maximum power dissipation is a function of TJ(max), θ JA, and TA. The maximum allowable power dissipation at any allowable ambient temperature is PD = (TJ(max) TA)/θ JA. Operating at the absolute maximum TJ of 5 C can affect reliability.. The package thermal impedance is calculated in accordance with JESD 5-7. POST OFFICE BOX 655 DALLAS, TEXAS 7565

5 SLLSD JULY 985 REVISED APRIL recommended operating conditions MIN TYP MAX UNIT VCC Supply voltage V VI or VIC Voltage at any bus terminal (separately or common mode) 7 V VIH High-level input voltage D, DE, and RE V VIL Low-level input voltage D, DE, and RE.8 V VID Differential input voltage (see Note 4) ± V IOH High-level output current Driver 6 ma Receiver 4 µa IOL Low-level output current Driver 6 Receiver 8 ma TA Operating free-air temperature SN6576B 4 5 SN7576B 7 C NOTE 4: Differential input/output bus voltage is measured at the noninverting terminal A, with respect to the inverting terminal B. 4 POST OFFICE BOX 655 DALLAS, TEXAS 7565

6 DRIVER SECTION SLLSD JULY 985 REVISED APRIL electrical characteristics over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT VIK Input clamp voltage II = 8 ma VO voltage IO = 6 V VOD Differential output voltage IO = V VOD Differential output voltage RL = Ω, See Figure / VOD or RL = 54 Ω, See Figure VOD Differential output voltage See Note V VOD Change in magnitude =54Ω of differential output voltage RL Ω or Ω, See Figure ±. V VOC Common-mode mode output voltage RL = 54 Ω or Ω, See Figure VOC IO Change in magnitude =54Ω of common-modeoutput voltage RL Ω or Ω, See Figure ±. V current + disabled, VO = V See Note 6 VO = 7 V.8 IIH High-level input current VI =.4 V µa IIL Low-level input current VI =.4 V 4 µa IOS Short-circuit output current ICC Supply current (total package) No load VO = 7 V 5 VO = 5 VO = VCC 5 VO = V 5 s enabled 4 7 s disabled 6 5 The power-off measurement in ANSI Standard TIA/EIA-4-B applies to disabled outputs only and is not applied to combined inputs and outputs. All typical values are at VCC = 5 V and TA = 5 C. VOD and VOC are the changes in magnitude of VOD and VOC, respectively, that occur when the input is changed from a high level to a low level. The minimum VOD with a -Ω load is either / VOD or V, whichever is greater. NOTES: 5. See ANSI Standard TIA/EIA-485-A, Figure.5, Test Termination Measurement. 6. This applies for both power on and off; refer to ANSI Standard TIA/EIA-485-A for exact conditions. The TIA/EIA-4-B limit does not apply for a combined driver and receiver terminal. switching characteristics, V CC = 5 V, R L = Ω, T A = 5 C (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT td(od) Differential-output delay time RL = 54 Ω, See Figure 5 ns tt(od) Differential-output transition time RL = 54 Ω, See Figure ns tpzh enable time to high level See Figure 4 85 ns tpzl enable time to low level See Figure ns tphz disable time from high level See Figure ns tplz disable time from low level See Figure 5 ns V V ma ma ma POST OFFICE BOX 655 DALLAS, TEXAS

7 SLLSD JULY 985 REVISED APRIL SYMBOL EQUIVALENTS DATA-SHEET PARAMETER TIA/EIA-4-B TIA/EIA-485-A VO Voa, Vob Voa, Vob VOD Vo Vo VOD Vt (RL = Ω) Vt (RL = 54 Ω) Vt (test termination VOD measurement ) VOD Vt Vt Vt Vt VOC Vos Vos VOC Vos Vos Vos Vos IOS Isa, Isb IO Ixa, Ixb Iia, Iib 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 MIN TYP MAX UNIT VIT+ Positive-going input threshold voltage VO =.7 V, IO =.4 ma. V VIT Negative-going input threshold voltage VO =.5 V, IO = 8 ma. V Vhys Input hysteresis voltage (VIT+ VIT ) 5 mv VIK Enable Input clamp voltage II = 8 ma VID = mv, VOH High-level output voltage See Figure VID = mv, VOL Low-level output voltage See Figure IOH = 4 µa,, IOL = 8 ma, 7.7 V V IOZ High-impedance-state output current VO =.4 V to.4 V ± µa II Line input current Other input = V, VI = V See Note 7 VI = 7 V.8 IIH High-level enable input current VIH =.7 V µa IIL Low-level enable input current VIL =.4 V µa ri Input resistance VI = V kω IOS Short-circuit output current 5 85 ma ICC Supply current (total package) No load s enabled 4 55 s disabled 6 5 All typical values are at VCC = 5 V, TA = 5 C. The algebraic convention, in which the less positive (more negative) limit is designated minimum, is used in this data sheet for common-mode input voltage and threshold voltage levels only. NOTE 7: This applies for both power on and power off. Refer to EIA Standard TIA/EIA-485-A for exact conditions. ma ma 6 POST OFFICE BOX 655 DALLAS, TEXAS 7565

8 switching characteristics, V CC = 5 V, C L = 5 pf, T A = 5 C SLLSD JULY 985 REVISED APRIL tplh tphl tpzh tpzl tphz tplz PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Propagation delay time, low- to high-level output 5 VID = to V, See Figure 6 Propagation delay time, high- to low-level output 5 ns enable time to high level See Figure 7 enable time to low level ns disable time from high level 5 See Figure 7 disable time from low level 7 5 ns PARAMETER MEASUREMENT INFORMATION VOD RL RL VOC VID VOL +IOL VOH IOH Figure. Driver V OD and V OC Figure. Receiver V OH and V OL Generator (see Note B) 5 Ω V RL = 54 Ω CL = 5 pf (see Note A) Input td(od) 5% % tt(od) V V td(od) 9%.5 V 5% %.5 V tt(od) TEST CIRCUIT VOLTAGE WAVEFORMS NOTES: A. CL includes probe and jig capacitance. B. The input pulse is supplied by a generator having the following characteristics: PRR MHz, 5% duty cycle, tr 6 ns, tf 6 ns, ZO = 5 Ω. Figure. Driver Test Circuit and Voltage Waveforms POST OFFICE BOX 655 DALLAS, TEXAS

9 SLLSD JULY 985 REVISED APRIL PARAMETER MEASUREMENT INFORMATION V or V Generator (see Note B) 5 Ω S CL = 5 pf (see Note A) RL = Ω Input tpzh. V tphz V V.5 V VOH Voff V TEST CIRCUIT VOLTAGE WAVEFORMS NOTES: A. CL includes probe and jig capacitance. B. The input pulse is supplied by a generator having the following characteristics: PRR MHz, 5% duty cycle, tr 6 ns, tf 6 ns, ZO = 5 Ω. Figure 4. Driver Test Circuit and Voltage Waveforms V or V Generator (see Note B) 5 Ω S CL = 5 pf (see Note A) 5 V RL = Ω Input tpzl. V V V tplz 5 V.5 V VOL TEST CIRCUIT VOLTAGE WAVEFORMS NOTES: A. CL includes probe and jig capacitance. B. The input pulse is supplied by a generator having the following characteristics: PRR MHz, 5% duty cycle, tr 6 ns, tf 6 ns, ZO = 5 Ω. Figure 5. Driver Test Circuit and Voltage Waveforms V Generator (see Note B) 5 Ω V TEST CIRCUIT CL = 5 pf (see Note A) Input tplh tphl. V. V VOLTAGE WAVEFORMS V VOH VOL NOTES: A. CL includes probe and jig capacitance. B. The input pulse is supplied by a generator having the following characteristics: PRR MHz, 5% duty cycle, tr 6 ns, tf 6 ns, ZO = 5 Ω. Figure 6. Receiver Test Circuit and Voltage Waveforms 8 POST OFFICE BOX 655 DALLAS, TEXAS 7565

10 PARAMETER MEASUREMENT INFORMATION SLLSD JULY 985 REVISED APRIL S kω S 5 V CL = 5 pf (see Note A) 5 kω N96 or Equivalent Generator (see Note B) 5 Ω S TEST CIRCUIT Input tpzh V V S to S Open S Closed Input tpzl V S to V S Closed S Open VOH V 4.5 V VOL Input V S to S Closed S Closed V Input V V S to S Closed S Closed tphz tplz.5 V VOH. V.5 V. V VOL VOLTAGE WAVEFORMS NOTES: A. CL includes probe and jig capacitance. B. The input pulse is supplied by a generator having the following characteristics: PRR MHz, 5% duty cycle, tr 6 ns, tf 6 ns, ZO = 5 Ω. Figure 7. Receiver Test Circuit and Voltage Waveforms POST OFFICE BOX 655 DALLAS, TEXAS

11 SLLSD JULY 985 REVISED APRIL TYPICAL CHARACTERISTICS VOH V High-Level Voltage V DRIVER HIGH-LEVEL OUTPUT VOLTAGE vs HIGH-LEVEL OUTPUT CURRENT VCC = 5 V TA = 5 C V OL Low-Level Voltage V DRIVER LOW-LEVEL OUTPUT VOLTAGE vs LOW-LEVEL OUTPUT CURRENT VCC = 5 V TA = 5 C IOH High-Level Current ma IOL Low-Level Current ma Figure 8 Figure 9 VOD V Differential Voltage V DRIVER DIFFERENTIAL OUTPUT VOLTAGE vs OUTPUT CURRENT VCC = 5 V TA = 5 C IO Current ma 9 Figure POST OFFICE BOX 655 DALLAS, TEXAS 7565

12 TYPICAL CHARACTERISTICS SLLSD JULY 985 REVISED APRIL VOH V High-Level Voltage V RECEIVER HIGH-LEVEL OUTPUT VOLTAGE vs HIGH-LEVEL OUTPUT CURRENT VID =. V TA = 5 C VCC = 4.75 V Figure VCC = 5.5 V VCC = 5 V IOH High-Level Current ma VOH V High-Level Voltage V RECEIVER HIGH-LEVEL OUTPUT VOLTAGE vs FREE-AIR TEMPERATURE VCC = 5 V VID = mv IOH = 44 µa Only the C to 7 C portion of the curve applies to the SN7576B. Figure TA Free-Air Temperature C RECEIVER LOW-LEVEL OUTPUT VOLTAGE vs LOW-LEVEL OUTPUT CURRENT RECEIVER LOW-LEVEL OUTPUT VOLTAGE vs FREE-AIR TEMPERATURE VOL V Low-Level Voltage V VCC = 5 V TA = 5 C VOL V Low-Level Voltage V VCC = 5 V VID = mv IOL = 8 ma IOL Low-Level Current ma TA Free-Air Temperature C Figure Figure 4 POST OFFICE BOX 655 DALLAS, TEXAS 7565

13 SLLSD JULY 985 REVISED APRIL TYPICAL CHARACTERISTICS VO V O Voltage V 5 4 RECEIVER OUTPUT VOLTAGE vs ENABLE VOLTAGE VID =. V Load = 8 kω to GND TA = 5 C VCC = 5 V VCC = 5.5 V VCC = 4.75 V VO O Voltage V VCC = 5.5 V VCC = 4.75 V RECEIVER OUTPUT VOLTAGE vs ENABLE VOLTAGE VID =. V Load = kω to VCC TA = 5 C VCC = 5 V VI Enable Voltage V.5.5 VI Enable Voltage V.5 Figure 5 Figure 6 APPLICATION INFORMATION SN6576B SN7576B SN6576B SN7576B RT RT Up to Transceivers NOTE A: The line should be terminated at both ends in its characteristic impedance (RT = ZO). Stub lengths off the main line should be kept as short as possible. Figure 7. Typical Application Circuit POST OFFICE BOX 655 DALLAS, TEXAS 7565

14 PACKAGE OPTION ADDENDUM 4-Oct-6 PACKAGING INFORMATION Orderable Device Status () Package Type Package Drawing Pins Package Qty SN6576BD ACTIVE SOIC D 8 75 Green (RoHS & SN6576BDE4 ACTIVE SOIC D 8 75 Green (RoHS & SN6576BDG4 ACTIVE SOIC D 8 75 Green (RoHS & SN6576BDR ACTIVE SOIC D 8 5 Green (RoHS & SN6576BDRE4 ACTIVE SOIC D 8 5 Green (RoHS & SN6576BDRG4 ACTIVE SOIC D 8 5 Green (RoHS & SN6576BP ACTIVE PDIP P 8 5 Pb-Free (RoHS) SN6576BPE4 ACTIVE PDIP P 8 5 Pb-Free (RoHS) SN7576BD ACTIVE SOIC D 8 75 Green (RoHS & SN7576BDE4 ACTIVE SOIC D 8 75 Green (RoHS & SN7576BDG4 ACTIVE SOIC D 8 75 Green (RoHS & SN7576BDR ACTIVE SOIC D 8 5 Green (RoHS & SN7576BDRE4 ACTIVE SOIC D 8 5 Green (RoHS & SN7576BDRG4 ACTIVE SOIC D 8 5 Green (RoHS & SN7576BP ACTIVE PDIP P 8 5 Pb-Free (RoHS) SN7576BPE4 ACTIVE PDIP P 8 5 Pb-Free (RoHS) SN7576BPSR ACTIVE SO PS 8 Green (RoHS & SN7576BPSRG4 ACTIVE SO PS 8 Green (RoHS & Eco Plan () Lead/Ball Finish MSL Peak Temp () Level--6C-UNLIM Level--6C-UNLIM Level--6C-UNLIM Level--6C-UNLIM Level--6C-UNLIM Level--6C-UNLIM N / A for Pkg Type N / A for Pkg Type Level--6C-UNLIM Level--6C-UNLIM Level--6C-UNLIM Level--6C-UNLIM Level--6C-UNLIM Level--6C-UNLIM N / A for Pkg Type N / A for Pkg Type Level--6C-UNLIM Level--6C-UNLIM () The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. () Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & - please check for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed.% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either ) lead-based flip-chip solder bumps used between the die and Addendum-Page

15 PACKAGE OPTION ADDENDUM 4-Oct-6 package, or ) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & : TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed.% by weight in homogeneous material) () MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release. 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. Addendum-Page

16 PACKAGE MATERIALS INFORMATION 9-Mar-8 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Reel Reel Diameter Width (mm) W (mm) A (mm) B (mm) K (mm) P (mm) SN6576BDR SOIC D Q SN7576BDR SOIC D Q SN7576BPSR SO PS Q W (mm) Pin Quadrant Pack Materials-Page

17 PACKAGE MATERIALS INFORMATION 9-Mar-8 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) SN6576BDR SOIC D SN7576BDR SOIC D SN7576BPSR SO PS Pack Materials-Page

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20 MECHANICAL DATA MPDIA JANUARY 995 REVISED JUNE 999 P (R-PDIP-T8) PLASTIC DUAL-IN-LINE 8.4 (,6).55 (9,) 5.6 (6,6).4 (6,) 4.7 (,78) MAX. (,5) MIN.5 (8,6). (7,6).5 (,8). (5,8) MAX Gage Plane Seating Plane.5 (,8) MIN. (,5) NOM. (,5).5 (,8). (,54). (,5) M.4 (,9) MAX 448/D 5/98 NOTES: A. All linear dimensions are in inches (millimeters). B. This drawing is subject to change without notice. C. Falls within JEDEC MS- For the latest package information, go to POST OFFICE BOX 655 DALLAS, TEXAS 7565

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