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www.DataSheet4U.com SN75176A DIFFERENTIAL BUS TRANSCEIVER SLLS100A – JUNE 1984 – REVISED MAY 1995 D D D D D D D D D D D D D D Bidirectional Transceiver Meets or Exceeds the Requirements of ANSI Standards EIA/TIA-422-B and ITU Recommendation V.11 Designed for Multipoint Transmission on Long Bus Lines in Noisy Environments 3-State Driver and Receiver Outputs Individual Driver and Receiver Enables Wide Positive and Negative Input /Output Bus Voltage Ranges Driver Output Capability . . . ± 60 mA Max Thermal-Shutdown Protection Driver Positive- and Negative-Current Limiting 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 D OR P PACKAGE (TOP VIEW) R RE DE D 1 2 3 4 8 7 6 5 VCC B A GND description The SN75176A differential bus transceiver is a monolithic integrated circuit designed for bidirectional data communication on multipoint bus-transmission lines. It is designed for balanced transmission lines and meets ANSI Standard EIA/TIA-422-B and ITU Recommendation V.11. The SN75176A combines a 3-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 externally connected together 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 whenever the driver is disabled or VCC = 0. These ports feature wide positive and negative common-mode voltage ranges making the device suitable for party-line applications. The driver is designed to handle loads up to 60 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 150°C. The receiver features a minimum input impedance of 12 kΩ, an input sensitivity of ± 200 mV, and a typical input hysteresis of 50 mV. The SN75176A can be used in transmission-line applications employing the SN75172 and SN75174 quadruple differential line drivers and SN75173 and SN75175 quadruple differential line receivers. The SN75176A is characterized for operation from 0°C to 70°C. 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 © 1995, Texas Instruments Incorporated POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 1 www.DataSheet4U.com SN75176A DIFFERENTIAL BUS TRANSCEIVER Function Tables DRIVER INPUT D H L X ENABLE DE H H L RECEIVER DIFFERENTIAL INPUTS A–B VID ≥ 0.2 V – 0.2 V < VID < 0.2 V VID ≤ – 0.2 V X Open ENABLE RE L L L H L OUTPUT R H ? L Z ? OUTPUTS A H L Z B L H Z SLLS100A – JUNE 1984 – REVISED MAY 1995 H = high level, L = low level, ? = indeterminate, X = irrelevant, Z = high impedance (off) logic symbol† DE RE 3 2 EN1 EN2 6 7 logic diagram (positive logic) DE D 1 1 A B RE R 3 4 2 1 6 7 A B Bus D 4 R 1 2 † This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 www.DataSheet4U.com SN75176A DIFFERENTIAL BUS TRANSCEIVER SLLS100A – JUNE 1984 – REVISED MAY 1995 schematics of inputs and outputs EQUIVALENT OF EACH INPUT VCC R(eq) 16.8 kΩ NOM 960 Ω NOM 960 Ω NOM TYPICAL OF A AND B I/O PORTS VCC TYPICAL OF RECEIVER OUTPUT VCC 85 Ω NOM Input Output GND Driver input: R(eq) = 3 kΩ NOM Enable inputs: R(eq) = 8 kΩ NOM R(eq) = equivalent resistor Input/Output Port 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 10 V to 15 V Enable input voltage, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5 V Continuous total power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Dissipation Rating Table Operating free-air temperature range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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. NOTE 1: All voltage values, except differential input/output bus voltage, are with respect to network ground terminal. DISSIPATION RATING TABLE PACKAGE D P TA ≤ 25°C POWER RATING 725 mW 1100 mW DERATING FACTOR ABOVE TA = 25°C 5.8 mW/°C 8.8 mW/°C TA = 70_ C POWER RATING 464 mW 704 mW TA = 105_ C POWER RATING 261 mW 396 mW POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 3 www.DataSheet4U.com SN75176A DIFFERENTIAL BUS TRANSCEIVER recommended operating conditions MIN Supply voltage, VCC Voltage at any bus terminal (separately or common mode), VI or VIC High-level input voltage, VIH Low-level input voltage, VIL D, DE, and RE D, DE, and RE Driver Receiver Driver Receiver 4.75 –7 2 0.8 ± 12 – 60 – 400 60 8 TYP 5 MAX 5.25 12 UNIT V V V V V mA µA mA °C SLLS100A – JUNE 1984 – REVISED MAY 1995 Differential input voltage, VID (see Note 2) High-level High level output current IOH current, Low level output current, IOL current Low-level Operating free-air temperature, TA 0 70 NOTE 2: Differential-input/output bus voltage is measured at the noninverting terminal A with respect to the inverting terminal B. 4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 www.DataSheet4U.com SN75176A DIFFERENTIAL BUS TRANSCEIVER SLLS100A – JUNE 1984 – REVISED MAY 1995 DRIVER SECTION electrical characteristics over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) PARAMETER VIK VOH VOL |VOD1| |VOD2| ∆|VOD| VOC ∆|VOC| IO IIH IIL IOS Input clamp voltage High-level High level output voltage Low level output voltage Low-level Differential output voltage Differential output voltage Change in magnitude of differential output voltage ‡ Common-mode output voltage§ Change in magnitude of common-mode output g g voltage ‡ Output current High-level input current Low-level input current Short-circuit output current Output disabled, , See Note 3 VI = 2.4 V VI = 0.4 V VO = – 7 V VO = VCC VO = 12 V ICC Supply current (total package) No load Outputs enabled Outputs disabled 35 26 VO = 12 V VO = – 7 V RL = 54 Ω or 100 Ω, See Figure 1 TEST CONDITIONS II = – 18 mA VIH = 2 V, , IOH = – 33 mA VIH = 2 V, , IOH = 33 mA IO = 0 RL = 100 Ω, RL = 54 Ω, VIL = 0.8 V, , VIL = 0.8 V, , 3.7 37 11 1.1 2VOD2 See Figure 1 See Figure 1 2 1.5 2.7 2.4 ± 0.2 3 ±0 2 0.2 1 – 0.8 20 – 400 – 250 250 500 50 40 mA mA MIN TYP† MAX – 1.5 UNIT V V V V V V V V mA µA µA † All typical values are at VCC = 5 V and TA = 25°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. § In ANSI Standard EIA/TIA-422-B, VOC, which is the average of the two output voltages with respect to GND, is called output offset voltage, VOS. NOTE 3: This applies for both power on and off; refer to ANSI Standard EIA/TIA-422-B for exact conditions. switching characteristics, VCC = 5 V, TA = 25°C PARAMETER td(OD) tt(OD) tPZH tPZL tPHZ tPLZ Differential-output delay time Differential-output transition time Output enable time to high level Output enable time to low level Output disable time from high level Output disable time from low level TEST CONDITIONS RL = 60 Ω Ω, RL = 110 Ω, RL = 110 Ω, RL = 110 Ω, RL = 110 Ω, See Figure 3 See Figure 4 See Figure 5 See Figure 4 See Figure 5 MIN TYP 40 65 55 30 85 20 MAX 60 95 90 50 130 40 UNIT ns ns ns ns ns ns POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 5 www.DataSheet4U.com SN75176A DIFFERENTIAL BUS TRANSCEIVER RECEIVER SECTION electrical characteristics over recommended ranges of common-mode input voltage, supply voltage, and operating free-air temperature (unless otherwise noted) PARAMETER VIT + VIT– Vhys VIK VOH VOL IOZ II IIH IIL ri IOS ICC Positive-going input threshold voltage Negative-going input threshold voltage Input hysteresis voltage (VIT + – VIT –) Enable clamp voltage High-level High level output voltage Low-level Low level output voltage High-impedance-state output current Line input current High-level enable input current Low-level enable input current Input resistance Short-circuit output current Supply current (total package) No load Outputs enabled Outputs disabled II = – 18 mA VID = 200 mV, , See Figure 2 VID = – 200 mV, , See Figu