SN75185 MULTIPLE RS-232 DRIVERS AND RECEIVERS SLLS181A – DECEMBER 1994 – REVISED NOVEMBER 1998 D D D D D Single Chip With Easy Interface Between UART and Serial Port Connector of IBM PC/AT and Compatibles Three Drivers and Five Receivers Meet or Exceed the Requirements of TIA / EIA-232-F and ITU v.28 Standards Designed to Support Data Rates Up To 120 kbps ESD Protection Meets or Exceeds 10 kV on RS-232 Pins and 5 kV on All Other Pins (Human-Body Model) Pinout Compatible With the SN75C185 DW OR N PACKAGE (TOP VIEW) VDD RA1 RA2 RA3 DY1 DY2 RA4 DY3 RA5 VSS 1 20 2 19 3 18 4 17 5 16 6 15 7 14 8 13 9 12 10 11 VCC RY1 RY2 RY3 DA1 DA2 RY4 DA3 RY5 GND description The SN75185 combines three drivers and five receivers from TI trade-standard SN75188 and SN75189 bipolar quadruple drivers and receivers, respectively. The pinout matches the flow-through design of the SN75C185 to decrease the part count, reduce the board space required, and allow easy interconnection of the UART and serial-port connector of IBM PC/AT and compatibles. The bipolar circuits and processing of the SN75185 provides a rugged low-cost solution for this function at the expense of quiescent power and external passive components relative to the SN75C185. The SN75185 complies with the requirements of the TIA/EIA-232-F and ITU (formerly CCITT) v.28 standards. These standards are for data interchange between a host computer and peripheral at signaling rates up to 20 kbit/s. The switching speeds of the SN75185 are fast enough to support rates up to 120 kbit/s with lower capacitive loads (shorter cables). Interoperability at the higher signaling rates cannot be assured unless the designer has design control of the cable and the interface circuits at both ends. For interoperability at signaling rates to 120 kbit/s, use of TIA/EIA-423-B (ITU v.10) and TIA/EIA-422-B (ITU v.11) standards are recommended. The SN75185 is characterized for operation over the temperature range of 0°C to 70°C. logic symbol† RA1 RA2 RA3 DY1 DY2 RA4 DY3 RA5 logic diagram (positive logic) 2 19 3 18 4 17 5 16 6 15 7 14 8 13 9 12 RY1 RA1 RY1 RA2 RY2 RA3 RY3 DY1 DA1 DY2 DA2 RA4 RY4 DY3 DA3 RA5 RY5 RY2 RY3 DA1 DA2 RY4 DA3 RY5 † This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. 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. IBM and PC/AT are trademarks of IBM Corporation. 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 SN75185 MULTIPLE RS-232 DRIVERS AND RECEIVERS SLLS181A – DECEMBER 1994 – REVISED NOVEMBER 1998 schematic of drivers To Other Drivers VDD ESD 11.6 kΩ Input DAx 9.4 kΩ ESD 75.8 Ω 320 Ω ESD 4.2 kΩ GND To Other Drivers 10.4 kΩ VSS 3.3 kΩ 68.5 Ω ESD To Other Drivers Resistor values shown are nominal. schematic (each receiver) To Other Receivers ESD 9 kΩ 5 kΩ VCC 1.66 kΩ ESD RYx Output 2 kΩ Input RAx ESD 3.8 kΩ 10 kΩ GND To Other Receivers Resistor values shown are nominal. 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 DYx Output SN75185 MULTIPLE RS-232 DRIVERS AND RECEIVERS SLLS181A – DECEMBER 1994 – REVISED NOVEMBER 1998 absolute maximum ratings over operating free-air temperature range (unless otherwise noted)† Supply voltage, VCC (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 V Supply voltage, VDD (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 V Supply voltage, VSS (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 15 V Input voltage range: Driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 15 V to 7 V Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 30 V to 30 V Driver output voltage range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 15 V to 15 V Receiver low-level output current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 mA Package thermal impedance, θJA (see Note 2): DW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97°C/W N package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67°C/W Electrostatic discharge: Human-body model: RS-232 pins, class 3, A (see Note 3) . . . . . . . . . . . . . . . 10 kV Human-body model: All pins, class 3, A (see Note 4) . . . . . . . . . . . . . . . . . . . . . 5 kV Machine model: RS-232 pins, class 3, B (see Note 5) . . . . . . . . . . . . . . . . . . . 600 V Machine model: All pins, class 3, B (see Note 4) . . . . . . . . . . . . . . . . . . . . . . . . 300 V Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 65°C to 150°C Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 60°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 voltages are with respect to the network ground terminal. 2. The package thermal impedance is calculated in accordance with JESD 51, except for through-hole packages, which use a trace length of zero. 3. RS-232 pins are tested with respect to ground and each other. 4. Per MIL-PRF–38535 5. RS-232 pins are tested with respect to ground. recommended operating conditions MIN NOM MAX Supply voltage, VDD 7.5 9 15 V Supply voltage, VSS – 7.5 –9 – 15 V Supply voltage, VCC 4.5 5 5.5 V High-level input voltage, VIH (driver only) 1.9 V Low-level input voltage, VIL (driver only) 0.8 Driver –6 High level output current, High-level current IOH Low level output current, Low-level current IOL Receiver – 0.5 Driver 6 Receiver 16 Operating free-air temperature, TA 0 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 UNIT 70 V mA mA °C 3 SN75185 MULTIPLE RS-232 DRIVERS AND RECEIVERS SLLS181A – DECEMBER 1994 – REVISED NOVEMBER 1998 supply currents PARAMETER TEST CONDITIONS All inputs at 1.9 V, IDD No load Supply current from VDD All inputs at 0.8 V, No load All inputs at 1.9 V, ISS No load Supply current from VSS All inputs at 0.8 V, ICC Supply current from VCC No load VCC = 5 V, MIN MAX VDD = 9 V, VDD = 12 V, VSS = – 9 V VSS = – 12 V 15 VDD = 15 V, VDD = 9 V, VSS = – 15 V VSS = – 9 V 25 VDD = 12 V, VDD = 15 V, VSS = – 12 V VSS = – 15 V 5.5 VDD = 9 V, VDD = 12 V, VSS = – 9 V VSS = – 12 V – 15 VDD = 15 V, VDD = 9 V, VSS = – 15 V VSS = – 9 V – 25 VDD = 12 V, VDD = 15 V, VSS = – 12 V VSS = – 15 V All inputs at 5 V, 19 UNIT mA 4.5 mA 9 – 19 mA – 3.2 – 3.2 mA – 3.2 No load 30 mA DRIVER SECTION electrical characteristics over recommended operating free-air temperature range, VDD = 9 V, VSS = –9 V, VCC = 5 V (unless otherwise noted) PARAMETER VOH VOL High-level output voltage IIH IIL High-level input current IOS(H) IOS(L) ro TEST CONDITIONS MIN MAX RL = 3 kΩ, See Figure 1 RL = 3 kΩ, See Figure 1 VI = 5 V, VI = 0, See Figure 2 10 µA Low-level input current See Figure 2 – 1.6 mA High-level short-circuit output current (see Note 7) VIL = 0.8 V, VO = 0, See Figure 1 – 4.5 – 12 – 19.5 mA VIH = 2 V, VO = 0, VCC = VDD = VSS = 0, See Figure 1 4.5 12 19.5 mA Low-level short-circuit output current 7.5 UNIT VIL = 0.8 V, VIH = 1.9 V, Low-level output voltage (see Note 6) 6 TYP – 7.5 V –6 V VO = – 2 V to 2 V 300 Ω NOTES: 6. The algebraic convention, where the more positive (less negative) limit is designated as maximum, is used in this data sheet for logic levels only (e.g., if –10 V is maximum, the typical value is a more negative voltage). 7. Output short-circuit conditions must maintain the total power dissipation below absolute maximum ratings. 8. Test conditions are those specified by TIA/EIA-232-F and as listed above. Output resistance (see Note 8) switching characteristics, VCC = 5 V, VDD = 12 V, VSS = –12 V, TA = 25°C PARAMETER tPLH tPHL tTLH tTHL TEST CONDITIONS Propagation delay time, low-to-high-level output Propagation delay time, high-to-low-level output Transition time, time low-to-high-level low to high level output Transition time, time high-to-low-level high to low level output RL = 3 kΩ to 7 kΩ,, CL = 15 pF,, See Figure 3 MIN TYP MAX UNIT 315 500 ns 75 175 ns RL = 3 kΩ to 7 kΩ, CL = 15 pF, See Figure 3 60 100 ns RL = 3 kΩ to 7 kΩ, CL = 2500 pF, See Figure 3 and Note 9 1.7 2.5 µs RL = 3 kΩ to 7 kΩ, CL = 15 pF, See Figure 3 40 75 ns RL = 3 kΩ to 7 kΩ, CL = 2500 pF, See Figure 3 and Note 10 1.5 2.5 µs NOTES: 9. Measured between – 3-V and 3-V points of the output waveform (TIA/EIA-232-F conditions), all unused inputs are tied. 10. Measured between 3-V and – 3-V points of the output waveform (TIA/EIA-232-F conditions), all unused inputs are tied. 4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 SN75185 MULTIPLE RS-232 DRIVERS AND RECEIVERS SLLS181A – DECEMBER 1994 – REVISED NOVEMBER 1998 RECEIVER SECTION electrical characteristics over recommended operating conditions (unless otherwise noted) PARAMETER VT T+ Positive going threshold voltage Positive-going VT– Vhys Negative-going threshold voltage TEST CONDITIONS See Figure 5 TA = 25°C TA = 0°C to 70 °C MIN TYPĔ MAX 1.75 1.9 2.3 1.55 0.75 Input hysteresis (VT + – VT–) 2.3 0.97 1.25 4 5 0.2 0.45 UNIT V 0.5 VOH High level output voltage High-level IOH = – 0.5 0 5 mA VIH = 0.75 V Inputs open 2.6 VOL Low-level input voltage IIH High level input current High-level IOL = 10 mA, VI = 25 V, VI = 3 V See Figure 5 3.6 See Figure 5 0.43 IIL Low level output current Low-level VI = 3 V, VI = – 25 V, See Figure 5 – 3.6 VI = – 3 V, See Figure 5 – 0.43 2.6 IOS Short-circuit output current See Figure 4 † All typical values are at TA = 25°C, VCC = 5 V, VDD = 9 V, and VSS = – 9 V. 8.3 – 8.3 V V mA mA – 3.4 –12 mA TYP MAX UNIT 107 500 ns switching characteristics, VCC = 5 V, VDD = 12 V, VSS = –12 V, TA = 25°C PARAMETER TEST CONDITIONS tPLH tPHL Propagation delay time, low-to-high-level output tTLH tTHL Transition time, low-to-high-level output Propagation delay time, high-to-low-level output CL = 50 pF, See Figure 6 MIN 42 150 ns 175 525 ns 16 60 ns RL = 5 kΩ Transition time, high-to-low-level output PARAMETER MEASUREMENT INFORMATION IOS(L) VDD VCC VDD VCC VDD or GND – IOS(H) IIH VSS or GND VI VI – IIL VO RL = 3 kΩ VI VSS VSS Figure 1. Driver Test Circuit for VOH, VOL, IOS(H), and IOS(L) POST OFFICE BOX 655303 Figure 2. Driver Test Circuit for IIH and IIL • DALLAS, TEXAS 75265 5 SN75185 MULTIPLE RS-232 DRIVERS AND RECEIVERS SLLS181A – DECEMBER 1994 – REVISED NOVEMBER 1998 PARAMETER MEASUREMENT INFORMATION 3V 1.5 V Input VDD Input V CC 1.5 V 0V t PHL Pulse Generator CL (see Note B) RL (see Note A) 90% Output VSS t PLH 50% 10% VOH 90% 50% 10% VOL t THL t TLH TEST CIRCUIT VOLTAGE WAVEFORMS The pulse generator has the following characteristics: tw = 25 µs, PRR = 20 kHz, ZO = 50 Ω, tr = tf < 50 ns. CL includes probe and jig capacitance. NOTES: A. B. Figure 3. Driver Test Circuit and Voltage Waveforms VDD VCC VDD VCC VI – IOH VT, VI VOH VOL VSS IOL VSS Figure 4. Receiver Test Circuit for IOS Figure 5. Receiver Test Circuit for VT, VOH, and VOL 4V Input VDD Input 50% 50% 0V VCC t PHL Pulse Generator CL (see Note B) RL (see Note A) 90% Output 50% 10% t PLH 50% 10% VSS VOLTAGE WAVEFORMS NOTES: A. B. The pulse generator has the following characteristics: tw = 25 µs, PRR = 20 kHz, ZO = 50 Ω, tr = tf < 50 ns. CL includes probe and jig capacitance. Figure 6. Receiver Propagation and Transition Times 6 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 VOH VOL t TLH t THL TEST CIRCUIT 90% SN75185 MULTIPLE RS-232 DRIVERS AND RECEIVERS SLLS181A – DECEMBER 1994 – REVISED NOVEMBER 1998 TYPICAL CHARACTERISTICS DRIVER SECTION OUTPUT CURRENT vs OUTPUT VOLTAGE VOLTAGE TRANSFER CHARACTERISTICS ÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎ 12 VDD = 9 V, VSS = – 9 V 6 0 –3 –6 ÎÎÎÎ ÎÎÎÎ – 12 4 0 –4 ÎÎÎ 3-kΩ Load Line –8 VOH(VI = 0.8 V) – 16 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 VI – Input Voltage – V 0 8 – 12 RL = 3 kΩ TA = 25°C –9 – 20 – 16 2 – 12 Figure 7 –8 –4 0 4 8 VO – Output Voltage – V ÁÁÁÁ ÁÁÁÁ ÎÎÎÎ ÁÁÁÁ ÎÎÎÎ ÁÁÁÁ 1000 VDD = 9 V VSS = – 9 V RL = 3 kΩ TA = 25°C SR – Slew Rate – V/ µs IOS(L) (VI = 1.9 V) 6 3 ÎÎÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎ ÎÎÎÎÎÎ ÁÁ ÎÎÎÎÎÎ ÁÁ 0 VDD = 9 V VSS = – 9 V VO = 0 –3 16 SLEW RATE vs LOAD CAPACITANCE 12 9 12 Figure 8 SHORT-CIRCUIT OUTPUT CURRENT vs FREE-AIR TEMPERATURE IIOS OS – Short-Circuit Output Current – mA VOL(VI = 1.9 V) 12 VDD = 6 V, VSS = – 6 V 3 VDD = 9 V VSS = – 9 V TA = 25°C 16 I O – Output Current – mA IO VO VO – Output Voltage – V 9 ÎÎÎÎÎÎ ÎÎÎÎÎÎ ÎÎÎÎ ÎÎÎÎÎ ÎÎÎÎ ÎÎÎÎÎ 20 VDD = 12 V, VSS = – 12 V 100 10 –6 IOS(H) (VI = 0.8 V) –9 1 – 12 0 10 20 30 40 50 60 70 10 TA – Free-Air Temperature – °C 100 1000 10000 CL – Load Capacitance – pF Figure 9 Figure 10 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 7 SN75185 MULTIPLE RS-232 DRIVERS AND RECEIVERS SLLS181A – DECEMBER 1994 – REVISED NOVEMBER 1998 TYPICAL CHARACTERISTICS RECEIVER SECTION INPUT THRESHOLD VOLTAGE vs SUPPLY VOLTAGE 2.4 2 2.2 1.8 VT + 2 Input Threshold Voltage – V Input Threshold Voltage – V INPUT THRESHOLD VOLTAGE vs FREE-AIR TEMPERATURE 1.8 1.6 1.4 1.2 VT – 0.8 1.6 1.4 1.2 1 VT – 0.8 0.6 0.4 0.6 0.4 VT + 0.2 0 10 20 30 40 50 60 0 2 70 TA – Free-Air Temperature – °C 3 ÎÎÎÎ ÎÎÎÎ ÎÎÎÎ ÎÎÎÎ ÎÎÎÎ ÎÎÎÎÎ ÁÁÁÁ VCC = 5 V TA = 25°C See Note A 14 CC = 500 pF CC = 12 pF 2 CC = 100 pF 1 0 10 VCC– VCC – Supply Voltage – V Amplitude – V ÁÁÁÁ ÁÁÁÁ ÎÎÎÎÎ ÁÁÁÁ ÎÎÎÎÎ ÁÁÁÁ 3 12 10 8 6 4 2 100 400 1000 4000 10000 tw – Pulse Duration – ns NOTE A: This figure shows the maximum amplitude of a positive-going pulse that, starting from 0 V, will not cause a change in the output level. RL ≥ 3 kΩ (from each output to GND) 40 0 0 10 POST OFFICE BOX 655303 20 30 40 50 60 TA – Free-Air Temperature – °C Figure 14 Figure 13 8 10 16 CC = 300 pF 4 9 MAXIMUM SUPPLY VOLTAGE vs FREE-AIR TEMPERATURE NOISE REJECTION 5 5 6 7 8 VCC – Supply Voltage – V Figure 12 Figure 11 6 4 • DALLAS, TEXAS 75265 70 SN75185 MULTIPLE RS-232 DRIVERS AND RECEIVERS SLLS181A – DECEMBER 1994 – REVISED NOVEMBER 1998 APPLICATION INFORMATION Diodes placed in series with the VDD and VSS leads protect the SN75185 in the fault condition in which the device outputs are shorted to ± 15 V and the power supplies are at low and provide low-impedance paths to ground (see Figure 15). VDD ± 15 V VDD Output SN75185 SN75185 VSS VSS Figure 15. Power-Supply Protection to Meet Power-Off Fault Conditions of TIA / EIA-232-F – 12 V TL16C450 ACE RI DTR CTS SO RTS SI DSR DCD 11 43 12 37 13 40 14 13 15 36 16 11 17 41 18 42 19 20 GND VSS RY5 RA5 DA3 DY3 RY4 RA4 DA2 DY2 SN75185 DA1 DY1 RY3 RA3 RY2 RA2 RY1 RA1 VCC VDD 10 5 9 9 R1 8 DTR 7 CTS 6 TX 5 RTS 4 RX 3 DSR 2 DCD 1 C3† TIA/EIA-232-F DB9S Connector C2† C1† 6 1 12 V 5V † See Figure 10 to select the correct values for the loading capacitors (C1, C2, and C3), which are required to meet the RS-232 maximum slew-rate requirement of 30 V/µs. The value of the loading capacitors required depends upon the line length and desired slew rate, but typically is 330 pF. Figure 16. Typical Connection POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 9 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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