SN75ALS172A QUADRUPLE DIFFERENTIAL LINE DRIVER SLLS121D – AUGUST 1990 – REVISED APRIL 1998 D D D D D D D D D D N PACKAGE (TOP VIEW) 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-Voltage Ranges Driver Output Capacity . . . ±60 mA Thermal Shutdown Protection Driver Positive and Negative Current Limiting Logically Interchangeable With SN75172 1A 1Y 1Z G 2Z 2Y 2A GND 1 16 2 15 3 14 4 13 5 12 6 11 7 10 8 9 VCC 4A 4Y 4Z G 3Z 3Y 3A DW PACKAGE (TOP VIEW) 1A 1Y NC 1Z G 2Z NC 2Y 2A GND description The SN75ALS172A comprises 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. This device is 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 it suitable for party-line applications in noisy environments. 1 20 2 19 3 18 4 17 5 16 6 15 7 14 8 13 9 12 10 11 VCC 4A 4Y NC 4Z G 3Z NC 3Y 3A NC – No internal connection The SN75ALS172A provides 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 150°C. The SN75ALS172A 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. Copyright 1998, 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 SN75ALS172A QUADRUPLE DIFFERENTIAL LINE DRIVER SLLS121D – AUGUST 1990 – REVISED APRIL 1998 FUNCTION TABLE (each driver) INPUT A ENABLES OUTPUTS G G Y H H X H Z L L H X L H H X L H L L X L L H X L H Z Z H = high level, L = low level, X = irrelevant, Z = high impedance (off) logic symbol† G G 4 ≥1 12 EN 2 1A 1 3 6 2A 7 5 10 3A 9 11 14 4A 15 13 † This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. Pin numbers shown are for the N package. logic diagram (positive logic) 4 G G 12 2 1A 1 7 6 5 2A 9 10 11 3A 4A 3 15 14 13 1Y 1Z 2Y 2Z 3Y 3Z 4Y 4Z Pin numbers shown are for the N package. 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 1Y 1Z 2Y 2Z 3Y 3Z 4Y 4Z SN75ALS172A QUADRUPLE DIFFERENTIAL LINE DRIVER SLLS121D – AUGUST 1990 – REVISED APRIL 1998 schematics of inputs and outputs EQUIVALENT OF EACH INPUT TYPICAL OF ALL OUTPUTS VCC VCC 35 kΩ NOM Input Output GND 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 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 are with respect to network ground terminal. DISSIPATION RATING TABLE PACKAGE TA ≤ 25°C POWER RATING DERATING FACTOR TA = 70°C POWER RATING TA = 85°C POWER RATING DW 1125 mW 9 mW/°C 720 mW 585 mW N 1150 mW 9.2 mW/°C 736 mW 598 mW recommended operating conditions Supply voltage, VCC High-level input voltage, VIH MIN NOM MAX UNIT 4.75 5 5.25 V 2 V Low-level input voltage, VIL 0.8 V Common-mode output voltage, VOC 12 –7 V High-level output current, IOH –60 mA Low-level output current, IOL 60 mA 70 °C Operating free-air temperature, TA 0 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 3 SN75ALS172A QUADRUPLE DIFFERENTIAL LINE DRIVER SLLS121D – AUGUST 1990 – REVISED APRIL 1998 electrical characteristics over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) PARAMETER VIK VO Input clamp voltage |VOD1| Differential output voltage Output voltage TEST CONDITIONS MIN II = –18 mA IO = 0 IO = 0 VCC = 5 V, RL = 100 Ω, RL = 54 Ω, See Figure 1 |VOD2| Differential output voltage |VOD3| Differential output voltage See Note 2 ∆|VOD| Change in magnitude of differential output voltage§ RL = 54 Ω or 100 Ω, VOC Common-mode output voltage¶ ∆|VOC| See Figure 1 TYP† MAX UNIT –1.5 V 0 6 V 1.5 6 V 1/2 VOD1 or 2‡ 1.5 2.5 V 5 V See Figure 1 ±0.2 V RL = 54 Ω or 100 Ω, See Figure 1 3 –1 V Change in magnitude of common-mode output voltage§ RL = 54 Ω or 100 Ω, See Figure 1 ±0.2 V IO Output current with power off VCC = 0, VO = –7 V to 12 V ±100 µA IOZ High-impedance-state output current VO = –7 V to 12 V ±100 µA 20 µA –100 µA ±250 mA IIH IIL High-level input current Low-level input current VI = 2.7 V VI = 0.4 V IOS Short-circuit output current VO = –7 V to 12 V ICC Supply current (all drivers) No load 1.5 5 Outputs enabled 36 55 Outputs disabled 15 30 mA † All typical values are at VCC = 5 V and TA = 25°C. ‡ The minimum VOD2 with a 100-Ω load is either 1/2 VOD1 or 2 V, whichever is greater. § ∆|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 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 TEST CONDITIONS TYP† MAX UNIT td(OD) tPZH Differential-output delay time RL = 54 Ω, See Figure 2 9 15 22 ns Output enable time to high level RL = 110 Ω, See Figure 3 30 45 70 ns tPZL tPHZ Output enable time to low level RL = 110 Ω, See Figure 4 25 40 65 ns Output disable time from high level RL = 110 Ω, See Figure 3 10 20 35 ns RL = 110 Ω, See Figure 4 10 30 45 ns tPLZ Output disable time from low level † All typical values are at VCC = 5 V and TA = 25°C. 4 MIN POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 SN75ALS172A QUADRUPLE DIFFERENTIAL LINE DRIVER SLLS121D – AUGUST 1990 – REVISED APRIL 1998 PARAMETER MEASUREMENT INFORMATION RL 2 VOD2 RL 2 VOC Figure 1. Differential and Common-Mode Output Voltages Y CL Generator (see Note A) 50 Ω 3V 3V RL = 54 Ω Input 1.5 V 1.5 V 0V Z td(ODL) td(ODH) CL = 50 pF (see Note B) Output Z Output Y TEST CIRCUIT VOLTAGE WAVEFORMS NOTES: A. The input pulse is supplied by a generator having the following characteristics: PRR = 1 MHz, ZO = 50 Ω, 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 3V Output S1 0 V or 3 V Generator (see Note A) Input CL = 50 pF (see Note B) 50 Ω 1.5 V 1.5 V 0V RL = 110 Ω Output 3V (see Note C) tPZH 0.5 V VOH 2.3 V Voff ≈ 0 tPHZ TEST CIRCUIT VOLTAGE WAVEFORMS NOTES: A. The input pulse is supplied by a generator having the following characteristics: PRR = 1 MHz, ZO = 50 Ω, 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. Figure 3. Test Circuit and Voltage Waveforms, tPZH and tPHZ POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 5 SN75ALS172A QUADRUPLE DIFFERENTIAL LINE DRIVER SLLS121D – AUGUST 1990 – REVISED APRIL 1998 PARAMETER MEASUREMENT INFORMATION 5V RL = 110 Ω S1 0 V or 3 V Generator (see Note A) Output 3V Input 1.5 V 1.5 V 0V tPZL CL = 50 pF (see Note B) 50 Ω 2.3 V Output tPLZ 5V VOL 3V (see Note C) 0.5 V TEST CIRCUIT VOLTAGE WAVEFORMS NOTES: A. The input pulse is supplied by a generator having the following characteristics: PRR = 1 MHz, ZO = 50 Ω, 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. Figure 4. Test Circuit and Voltage Waveforms, tPZL and tPLZ 6 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 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. 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