SN75ALS1177, SN75ALS1178 DUAL DIFFERENTIAL DRIVERS AND RECEIVERS SLLS154A – MARCH 1993 – REVISED MAY 1995 D D D D D D D D D D D D D Meet or Exceed Standards EIA/TIA-422-B, RS-485, CCITT Recommendation V.11 Designed for Multipoint Bus Transmission on Long Bus Lines in Noisy Environments Low Supply Current Requirement 50 mA Max Driver Positive- and Negative-Current Limiting Driver Common-Mode Output Voltage Range of – 7 V to 12 V Thermal Shutdown Protection Driver 3-State Outputs Active-High Enable Receiver Common-Mode Input Voltage Range of – 12 V to 12 V Receiver Input Sensitivity . . . ± 200 mV Receiver Hysteresis . . . 50 mV Typ Receiver High Input Impedance 12 kΩ Min Receiver 3-State Outputs Active-Low Enable for SN75ALS1177 Only Operate From Single 5-V Supply description The SN75ALS1177 and SN75ALS1178 dual differential drivers and receivers are monolithic integrated circuits designed for bidirectional data communication on multipoint bus transmission lines. They are designed for balanced transmission lines and meet standards EIA/TIA-422-B, RS-485, and CCITT Recommendation V.11. SN75ALS1177 . . . N OR NS† PACKAGE (TOP VIEW) 1B 1A 1R RE 2R 2A 2B GND 1 16 2 15 3 14 4 13 5 12 6 11 7 10 8 9 VCC 1D 1Y 1Z DE 2Z 2Y 2D SN75ALS1178 . . . N OR NS† PACKAGE (TOP VIEW) 1B 1A 1R 1DE 2R 2A 2B GND 1 16 2 15 3 14 4 13 5 12 6 11 7 10 8 9 VCC 1D 1Y 1Z 2DE 2Z 2Y 2D † The NS package is only available in left-end taped and reeled (SN75ALS1177NSLE and SN75ALS1178SNLE). The SN75ALS1177 combines dual 3-state differential line drivers and dual 3-state differential input line receivers, both of which operate from a single 5-V power supply. The drivers and receivers have active-high and active-low enables, respectively, which can be externally connected together to function as direction control. The SN75ALS1178 drivers each have an individual active-high enable. Fail-safe design ensures that when the receiver inputs are open, the receiver outputs are always high. The SN75ALS1177 and SN75ALS1178 are 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 1995, 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 SN75ALS1177, SN75ALS1178 DUAL DIFFERENTIAL DRIVERS AND RECEIVERS SLLS154A – MARCH 1993 – REVISED MAY 1995 Function Tables SN75ALS1177, SN75ALS1178 (each driver) INPUT D ENABLE DE H H L X OUTPUTS Y Z H L H L H L Z Z SN75ALS1177 (each receiver) DIFFERENTIAL A–B ENABLE RE OUTPUT Y VID ≥ 0.2 V – 0.2 V < VID < 0.2 V L H L ? VID ≤ – 0.2 V X L L H Z Open L H SN75ALS1178 (each receiver) DIFFERENTIAL A–B OUTPUT Y VID ≥ 0.2 V – 0.2 V < VID < 0.2 V H VID ≤ – 0.2 V Open ? L H H = high level, L = low level, ? = indeterminate, X = irrelevant, Z = high impedance (off) 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 SN75ALS1177, SN75ALS1178 DUAL DIFFERENTIAL DRIVERS AND RECEIVERS SLLS154A – MARCH 1993 – REVISED MAY 1995 logic symbol† logic diagram (positive logic) SN75ALS1177 SN75ALS1177 DE RE 1D 1R 2D 2R 12 4 EN1 DE EN2 1 15 1 3 14 13 2 2 1 1 9 1 5 10 11 6 2 7 RE 1D 1R 2DE 2D 2R 4 15 EN 1Z 1D 13 2 3 1 12 9 EN 10 11 6 5 7 14 15 13 1A 1B 1R 2Y 2Z 2D 2A 2 3 1 10 9 11 2B 2R 14 4 1Y SN75ALS1178 1DE 12 6 5 1Y 7 1Y 1Z 1A 1B 2Y 2Z 2A 2B SN75ALS1178 1Z 1DE 1A 1D 1B 2Y 1R 2Z 2A 2DE 2B 2D † These symbols are in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. 2R 4 14 15 13 2 3 1 12 10 9 11 6 5 7 1Y 1Z 1A 1B 2Y 2Z 2A 2B equivalent schematics EQUIVALENT OF DRIVER OR ENABLE INPUT EQUIVALENT OF RECEIVER INPUT VCC VCC 35 kΩ NOM Input 17 kΩ NOM 1.7 kΩ NOM Input 288 kΩ NOM 1.7 kΩ NOM VCC (A) or GND (B) GND POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 3 SN75ALS1177, SN75ALS1178 DUAL DIFFERENTIAL DRIVERS AND RECEIVERS SLLS154A – MARCH 1993 – REVISED MAY 1995 schematics of outputs TYPICAL OF DRIVER OUTPUTS TYPICAL OF RECEIVER OUTPUTS VCC 70 Ω NOM VCC Output 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 (DE, RE, and D inputs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V Output voltage range, VO (Driver) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 9 V to 14 V Input voltage range, Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 14 V to 14 V Receiver differential-input voltage range (see Note 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 14 V to 14 V Receiver low-level output current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 mA 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. NOTES: 1. All voltage values, except differential input voltage, are with respect to the network ground terminal. 2. Differential input voltage is measured at the noninverting terminal with respect to the inverting terminal. DISSIPATION RATING TABLE 4 PACKAGE TA ≤ 25°C POWER RATING OPERATING FACTOR ABOVE TA = 25°C TA = 70°C POWER RATING N 1150 mW 9.2 mW/°C 736 mW NS 625 mW 4.0 mW/°C 445 mW POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 SN75ALS1177, SN75ALS1178 DUAL DIFFERENTIAL DRIVERS AND RECEIVERS SLLS154A – MARCH 1993 – REVISED MAY 1995 recommended operating conditions Supply voltage, VCC Differential input voltage, VID Receiver Common-mode output voltage, VOC Driver Common-mode input voltage, VIC Receiver High-level input voltage, VIH DE, RE, D Low-level input voltage, VIL DE, RE, D High level output current, High-level current IOH Low level output current, Low-level current IOL MIN NOM MAX UNIT 4.75 5 5.25 V ± 12 V 12 V ± 12 V –7† 2 Driver Receiver Driver V 0.8 V – 60 mA – 400 µA 60 Receiver 8 mA Operating free-air temperature, TA 0 70 °C † The algebraic convention, where the less positive (more negative) limit is designated as minimum, is used in this data sheet for common-mode output and threshold voltage level only. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 5 SN75ALS1177, SN75ALS1178 DUAL DIFFERENTIAL DRIVERS AND RECEIVERS SLLS154A – MARCH 1993 – REVISED MAY 1995 DRIVER SECTION electrical characteristics over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) PARAMETER VIK VOH Input clamp voltage VOL |VOD1| Low-level output voltage TEST CONDITIONS II = – 18 mA VIH = 2 V, High-level output voltage Differential output voltage VIH = 2 V, IO = 0 |VOD2| Differential output voltage VCC = 5 V,, RL = 100 Ω |VOD3| Differential output voltage ∆|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) IO(OFF) IOZ Output current with power off IIH IIL High-level input current IOS ICC Short circuit output current Short-circuit Supply current (total package) IOH = – 33 mA IOL = 33 mA MAX UNIT – 1.5 V 3.3 V 1.1 V 1.5 6 V 1/2 VOD1 See Figure 1 V 2 RL = 54 Ω 1.5 5 See Note 3 1.5 5 V ± 0.2 V 3 V ± 0.2 V ± 100 µA ± 100 µA 100 µA – 100 µA RL = 54 Ω or 100 Ω, High-impedance-state output current Low-level input current VIL = 0.8 V, VIL = 0.8 V, TYP† MIN See Figure 1 –1‡ VCC = 0, VO = – 7 V to 12 V VO = – 7 V to 12 V VIH = 2.7 V VIL = 0.4 V VO = – 7 V VO = VCC – 250 VO = 12 V VO = 0 V 250 No load 250 mA 150 Outputs enabled 35 50 Outputs disabled 20 50 mA † All typical values are at VCC = 5 V and TA = 25°C. ‡ The algebraic convention, where the less positive (more negative) limit is designated as minimum, is used in this data sheet for common-mode output and threshold voltage levels only. NOTES: 3. See EIA Standard RS-485 Figure 3.5, test termination measurement 2. 4. ∆|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. switching characteristics at VCC = 5 V, TA = 25°C (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT 9 15 22 ns 9 15 22 ns 0 2 8 ns tPLH tPHL Propagation delay time, high- to low-level output tsk tPZH Output-to-output skew Output enable time to high level CL = 100 pF, See Figure 4 30 35 50 ns tPZL tPHZ Output enable time to low level CL = 100 pF, See Figure 5 5 15 25 ns Output disable time from high level CL = 15 pF, See Figure 4 7 15 30 ns tPLZ Output disable time from low level CL = 15 pF, See Figure 5 7 15 30 ns 6 Propagation delay time, low- to high-level output RL = 60 Ω Ω, See Figure 3 POST OFFICE BOX 655303 CL1 = CL2 = 100 pF, F • DALLAS, TEXAS 75265 SN75ALS1177, SN75ALS1178 DUAL DIFFERENTIAL DRIVERS AND RECEIVERS SLLS154A – MARCH 1993 – REVISED MAY 1995 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– Positive-going input threshold voltage Vhys VIK Input hysteresis voltage (VIT+ – VIT–) TEST CONDITIONS VO = 2.7 V, VO = 0.5 V, Negative-going input threshold voltage Enable input clamp voltage VOH High-level output voltage VOL Low-level output voltage IOZ High-impedance-state output current IO = – 0.4 mA IO = 8 mA MIN TYP† MAX 0.2 – 0.2 ‡ SN75ALS1177 II Line input current (see Note 5) IIH IIL High-level input current, RE SN75ALS1177 Low-level input current, RE SN75ALS1177 ri Input resistance II = – 18 mA VID = 200 mV, See Figure 2 IOH = – 400 µA, VID = 200 mV, See Figure 2 IOL = 8 mA, mV – 1.5 2.7 V V VO = 0.4 V to 2.4 V Other input at 0 V V V 50 SN75ALS1177 UNIT VI = 12 V VI = – 7 V 0.45 V ± 20 µA 1 – 0.8 VIH = 2.7 V VIL = 0.4 V 20 – 100 12 mA µA µA kΩ IOS Short-circuit output current VO = 0 V, See Note 6 – 15 – 85 mA ICC Supply current (total package) No load, Outputs enabled 35 50 mA † All typical values are at VCC = 5 V and TA = 25°C. ‡ The algebraic convention, where the less positive (more negative) limit is designated as minimum, is used in this data sheet for common-mode output and threshold voltage levels only. NOTES: 5. Refer to EIA standards RS-422-A, RS-423-A, and RS-485-A for exact conditions. 6. Not more than one output should be shorted at a time. switching characteristics at VCC = 5 V, TA = 25°C (unless otherwise noted) PARAMETER TEST CONDITIONS tPLH tPHL Propagation delay time, low- to high-level output tPZH tPZL Output enable time to high level tPHZ tPLZ MIN TYP MAX UNIT 15 25 37 ns 15 25 37 ns CL = 15 pF, pF See Figure 6 SN75ALS1177 CL = 100 pF, See Figure 7 10 20 30 ns Output enable time to low level SN75ALS1177 CL = 100 pF, See Figure 7 10 20 30 ns Output disable time from high level SN75ALS1177 CL = 15 pF, See Figure 7 5 12 16 ns Output disable time from low level SN75ALS1177 CL = 15 pF, See Figure 7 5 12 16 ns Propagation delay time, high- to low-level output POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 7 SN75ALS1177, SN75ALS1178 DUAL DIFFERENTIAL DRIVERS AND RECEIVERS SLLS154A – MARCH 1993 – REVISED MAY 1995 PARAMETER MEASUREMENT INFORMATION RL 2 VID IOH VOD2 VOH RL 2 VOL VOC Figure 1. Driver Test Circuit, VOD and VOC Figure 2. Receiver Test Circuit, VOH and VOL 3V Driver Input CL1 = 100 pF (see Note B) Generator (see Note A) 1.5 V 1.5 V 0V tPLH 60 Ω 50 Ω IOL tPHL 1/2 VO 1/2 VO Z Output CL 2 = 100 pF (see Note B) VO Y Output 3V tsk DRIVER TEST CIRCUIT tsk DRIVER VOLTAGE WAVEFORMS NOTES: A. The pulse generator has the following characteristics: PRR ≤ 1 MHz, 50% duty cycle, tr ≤ 10 ns, tf ≤ 10 ns. B. CL includes probe and jig capacitance. Figure 3. Driver Propagation Delay Times Output S1 3V 3 V or 0 V Generator (see Note A) 1.5 V Input 1.5 V 0V CL (see Note B) RL = 500 Ω 50 Ω tPZH tPHZ VOH Output 2.3 V 0V 0.5 V DRIVER VOLTAGE WAVEFORMS DRIVER TEST CIRCUIT NOTES: A. The pulse generator has the following characteristics: PRR ≤ 1 MHz, 50% duty cycle, tr ≤ 10 ns, tf ≤ 10 ns. B. CL includes probe and jig capacitance. Figure 4. Driver Enable and Disable TImes 8 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 SN75ALS1177, SN75ALS1178 DUAL DIFFERENTIAL DRIVERS AND RECEIVERS SLLS154A – MARCH 1993 – REVISED MAY 1995 PARAMETER MEASUREMENT INFORMATION VCC RL = 500 Ω 3V S1 Output 3 V or 0 V Generator (see Note A) Input 1.5 V 1.5 V 0V tPLZ tPZL 0.5 V CL (see Note B) 0V 50 Ω 2.3 V Output VOL DRIVER VOLTAGE WAVEFORMS DRIVER TEST CIRCUIT NOTES: A. The pulse generator has the following characteristics: PRR ≤ 1 MHz, 50% duty cycle, tr ≤ 10 ns, tf ≤ 10 ns. B. CL includes probe and jig capacitance. Figure 5. Driver Enable and Disable Times Output Generator (see Note A) 50 Ω 1 kΩ 0V CL (see Note B) 1 kΩ VCC 1N916 or Equivalent 0 V (SN75ALS1177 only) RECEIVER TEST CIRCUIT 2.5 V 0V Input 0V – 2.5 V tPHL tPLH VOH Output 1.5 V 1.5 V VOL DRIVER VOLTAGE WAVEFORMS NOTES: A. The pulse generator has the following characteristics: PRR ≤ 1 MHz, 50% duty cycle, tr ≤ 10 ns, tf ≤ 10 ns. B. CL includes probe and jig capacitance. Figure 6. Receiver Propagation Delay Times POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 9 SN75ALS1177, SN75ALS1178 DUAL DIFFERENTIAL DRIVERS AND RECEIVERS SLLS154A – MARCH 1993 – REVISED MAY 1995 PARAMETER MEASUREMENT INFORMATION S1 Output 1.5 V S2 1 kΩ VCC –1.5 V CL (see Note B) Generator (see Note A) 1 kΩ 1N916 or Equivalent 50 Ω S3 RECEIVER TEST CIRCUIT 3V Input 1.5 V 1.5 V 0V S1 to –1.5 V S2 Closed tPZL S3 Closed S1 to –1.5 V S2 Closed S3 Closed tPLZ 0.5 V 5V 1.5 V Output VOL S1 to 1.5 V S2 Open tPZH S3 Closed VOH 1.5 V S1 to 1.5 V S2 Open tPHZ S3 Closed 0V 0.5 V RECEIVER VOLTAGE WAVEFORMS NOTES: A. The pulse generator has the following characteristics: PRR ≤ 1 MHz, 50% duty cycle, tr ≤ 10 ns, tf ≤ 10 ns. B. CL includes probe and jig capacitance. Figure 7. Receiver Output Enable and Disable TImes 10 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. 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