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| SN65ALS172A, SN75ALS172A QUADRUPLE DIFFERENTIAL LINE DRIVERS SLLS121C - AUGUST 1990 - REVISED MAY 1995 * * * * * * * * * * Meets or Exceeds ANSI Standards EIA/TIA-422-B and RS-485 and ITU Recommendation V.11 High-Speed Advanced Low-Power Schottky Circuitry Designed for 20-MBaud Operation in Both Serial and Parallel Applications Designed for Multipoint Transmission on Long Bus Lines in Noisy Environments Low Supply Current Requirements 55 mA Max Wide Positive and Negative Input/Output Bus Voltages Ranges Driver Output Capacity . . . 60 mA Thermal Shutdown Protection Driver Positive and Negative Current Limiting Logically Interchangeable With SN75172 SN75ALS172A . . . N PACKAGE (TOP VIEW) 1A 1Y 1Z G 2Z 2Y 2A GND 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 VCC 4A 4Y 4Z G 3Z 3Y 3A DW PACKAGE (TOP VIEW) description The SN65ALS172A and SN75ALS172A are comprised of four line drivers with 3-state differential outputs. They are designed to meet the requirements of ANSI Standards EIA/TIA-422-B and RS-485 and ITU Recommendation V.11. These devices are optimized for balanced multipoint bus transmission at rates of up to 20 Mbaud. Each driver features wide positive and negative common-mode output voltage ranges making them suitable for party-line applications in noisy environments. The SN65ALS172A and SN75ALS172A provide positive- and negative-current limiting and thermal shutdown for protection from line fault conditions on the transmission bus line. Shutdown occurs at a junction temperature of approximately 150C. The SN65ALS172A is characterized for operation from - 40C to 85C and the SN75ALS172A is characterized for operation from 0C to 70C. 1A 1Y NC 1Z G 2Z NC 2Y 2A GND 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 VCC 4A 4Y NC 4Z G 3Z NC 3Y 3A NC - No internal connection FUNCTION TABLE (each driver) INPUT A H L H L X ENABLES G G H X H X X L X L L H OUTPUTS Y Z L H H L L H H L Z Z X = irrelevant, H = high level, L = low level, Z = high impedance (off) 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 (c) 1995, Texas Instruments Incorporated POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 2-1 SN65ALS172A, SN75ALS172A QUADRUPLE DIFFERENTIAL LINE DRIVERS SLLS121C - AUGUST 1990 - REVISED MAY 1995 logic symbol G G 4 12 1 1 EN 2 3 6 5 10 11 14 13 logic diagram (positive logic) G G 1Y 1Z 2Y 2Z 3Y 3Z 4Y 4Z 4A 3A 15 9 7 2A 1A 4 12 1 2 3 6 5 10 11 14 13 1Y 1Z 2Y 2Z 3Y 3Z 4Y 4Z 1A 2A 7 3A 9 4A 15 This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. Terminal numbers shown are for the N package. schematics of inputs and outputs EQUIVALENT OF EACH INPUT VCC 35 k NOM TYPICAL OF ALL OUTPUTS VCC Input Output GND 2-2 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 SN65ALS172A, SN75ALS172A QUADRUPLE DIFFERENTIAL LINE DRIVERS SLLS121C - AUGUST 1990 - REVISED MAY 1995 absolute maximum ratings over operating free-air temperature range (unless otherwise noted) Supply voltage, VCC (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V Input voltage, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V Output voltage range, VO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 9 V to 14 V Continuous total dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Dissipation Rating Table Operating free-air temperature range, TA: SN65ALS172A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 40C to 85C SN75ALS172A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0C to 70C Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 65C to 150C Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260C 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 are with respect to network ground terminal. DISSIPATION RATING TABLE PACKAGE DW N TA 25C POWER RATING 1125 mW 1150 mW DERATING FACTOR 9 mW/C 9.2 mW/C TA = 70C POWER RATING 720 mW 736 mW TA = 85C POWER RATING 585 mW 598 mW recommended operating conditions MIN Supply voltage, VCC High-level input voltage, VIH Low-level input voltage, VIL Common-mode output voltage, VOC High-level output current, IOH Low-level output current, IOL Operating free-air temperature, TA free air temperature SN65ALS172A SN75ALS172A - 40 0 4.75 2 0.8 +12 -7 - 60 60 85 70 NOM 5 MAX 5.25 UNIT V V V V mA mA C POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 2-3 SN65ALS172A, SN75ALS172A QUADRUPLE DIFFERENTIAL LINE DRIVERS SLLS121C - AUGUST 1990 - REVISED MAY 1995 electrical characteristics over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) PARAMETER VIK VO | VOD1 | | VOD2 | | VOD3 | | V OD| VOC | V OC | IO IOZ IIH IIL IOS ICC Input clamp voltage Output voltage Differential output voltage Differential out ut voltage output Differential output voltage Change in magnitude of differential output voltage Common-mode output voltage Change in magnitude of common-mode output voltage Output current with power off High-impedance-state output current High-level input current Low-level input current Short-circuit output current Supply current (all drivers) VCC = 0, VO = - 7 V to 12 V VI = 2.7 V VI = 0.4 V VO = - 7 V to 12 V No load Outputs enabled Outputs disabled 36 15 VO = - 7 V to 12 V RL = 54 or 100 , See Figure 1 II = - 18 mA IO = 0 IO = 0 VCC = 5 V, RL = 100 RL = 54 See Note 2 TEST CONDITIONS MIN 0 1.5 See Figure 1 1/2 VOD1 or 2 1.5 15 1.5 2.5 25 5 5 0.2 +3 -1 0.2 100 100 20 - 100 250 55 30 V V V V A A A A mA mA TYP MAX - 1.5 6 6 UNIT V V V V All typical values are at VCC = 5 V and TA = 25C. The minimum VOD2 with a 100- load is either 1/2 VOD1 or 2 V, whichever is greater. | V OD| and | V OC | 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 ground, is called output offset voltage, VOS. NOTE 2: See EIA Standard RS-485, Figure 3-5, Test Termination Measurement 2. switching characteristics over recommended ranges of supply voltage and operating free-air temperature, CL = 50 pF PARAMETER td(OD) tPZH tPZL tPHZ Differential-output delay time Output enable time to high level Output enable time to low level Output disable time from high level TEST CONDITIONS RL = 54 , RL = 110 , RL = 110 , RL = 110 , RL = 110 , See Figure 2 See Figure 3 See Figure 4 See Figure 3 See Figure 4 MIN 9 30 25 10 10 TYP 15 45 40 20 30 MAX 22 70 65 35 45 UNIT ns ns ns ns ns tPLZ Output disable time from low level All typical values are at VCC = 5 V and TA = 25C. 2-4 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 SN65ALS172A, SN75ALS172A QUADRUPLE DIFFERENTIAL LINE DRIVERS SLLS121C - AUGUST 1990 - REVISED MAY 1995 PARAMETER MEASUREMENT INFORMATION RL 2 VOD2 RL 2 VOC Figure 1. Differential and Common-Mode Output Voltages Y CL Generator (see Note A) 50 3V CL = 50 pF (see Note B) TEST CIRCUIT RL = 54 Z 3V Input 0 Output Z Output Y 1.5 V td(ODH) 1.5 V td(ODL) VOLTAGE WAVEFORMS NOTES: A. The input pulse is supplied by a generator having the following characteristics: PRR = 1 MHz, ZO = 50 , duty cycle = 50%, tf 5 ns, tr 5 ns. B. CL includes probe and stray capacitance. Figure 2. Differential Output Test Circuit and Voltage Waveforms POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 2-5 SN65ALS172A, SN75ALS172A QUADRUPLE DIFFERENTIAL LINE DRIVERS SLLS121C - AUGUST 1990 - REVISED MAY 1995 PARAMETER MEASUREMENT INFORMATION Output S1 0 V or 3 V Generator (see Note A) 50 3V (see Note C) CL = 50 pF (see Note B) RL = 110 Output 2.3 V tPHZ TEST CIRCUIT VOLTAGE WAVEFORMS Input 1.5 V 1.5 V 0V tPZH 0.5 V VOH Voff 0 3V Figure 3. Test Circuit and Voltage Waveforms, tPZH and tPHZ 5V RL = 110 S1 0 V or 3 V tPZL Generator (see Note A) 50 3V (see Note C) 0.5 V TEST CIRCUIT VOLTAGE WAVEFORMS CL = 50 pF (see Note B) 2.3 V Output VOL tPLZ 5V Output 3V Input 1.5 V 1.5 V 0V Figure 4. Test Circuit and Voltage Waveforms, tPZL and tPLZ NOTES: A. The input pulse is supplied by a generator having the following characteristics: PRR = 1 MHz, ZO = 50 , duty cycle = 50%, tf 5 ns, tr 5 ns. B. CL includes probe and stray capacitance. C. To test the active-low enable G, ground G and apply an inverted input waveform to G. 2-6 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 IMPORTANT NOTICE Texas Instruments (TI) reserves the right to make changes to its products or to discontinue any semiconductor product or service without notice, and advises its customers to obtain the latest version of relevant information to verify, before placing orders, that the information being relied on is current and complete. TI warrants performance of its semiconductor products and related software 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, INTENDED, AUTHORIZED, OR WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT APPLICATIONS, DEVICES OR SYSTEMS OR OTHER CRITICAL APPLICATIONS. Inclusion of TI products in such applications is understood to be fully at the risk of the customer. Use of TI products in such applications requires the written approval of an appropriate TI officer. Questions concerning potential risk applications should be directed to TI through a local SC sales office. In order to minimize risks associated with the customer's applications, adequate design and operating safeguards should be provided by the customer to minimize inherent or procedural hazards. TI assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or services described herein. Nor does TI 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. Copyright (c) 1998, Texas Instruments Incorporated |
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