Order this document by MC75172B/D ! The Motorola MC75172B/174B Quad Line drivers are differential high speed drivers designed to comply with the EIA–485 Standard. Features include three–state outputs, thermal shutdown, and output current limiting in both directions. These devices also comply with EIA–422–A, and CCITT Recommendations V.11 and X.27. The MC75172B/174B are optimized for balanced multipoint bus transmission at rates in excess of 10 MBPS. The outputs feature wide common mode voltage range, making them suitable for party line applications in noisy environments. The current limit and thermal shutdown features protect the devices from line fault conditions. These devices offer optimum performance when used with the MC75173 and MC75175 line receivers. Both devices are available in 16–pin plastic DIP and 20–pin wide body surface mount packages. • Meets EIA–485 Standard for Party Line Operation • • • • • • • • • • QUAD EIA–485 LINE DRIVERS SEMICONDUCTOR TECHNICAL DATA P SUFFIX PLASTIC PACKAGE CASE 648 Meets EIA–422–A and CCITT Recommendations V.11 and X.27 Operating Ambient Temperature: –40°C to +85°C DW SUFFIX PLASTIC PACKAGE CASE 751D (SO–20L) High Impedance Outputs Common Mode Output Voltage Range: –7 to 12 V Positive and Negative Current Limiting Transmission Rates in Excess of 10 MBPS ORDERING INFORMATION Thermal Shutdown at 150°C Junction Temperature, (± 20°C) ā Single 5.0 V Supply Device Pin Compatible with TI SN75172/4 and NS µA96172/4 Operating Temperature Range MC75172BDW Interchangeable with MC3487 and AM26LS31 for EIA–422–A Applications Package SO–20L TA = – 40° to +85°C MC75174BDW MC75174BP SO–20L Plastic DIP PIN CONNECTIONS MC75172B MC75174B 20 VCC 1A 1 16 VCC 1A 1 1Y 2 19 4A 1Y 2 15 4A 1Y 2 19 4A 14 4Y NC 3 18 4Y 1Z 3 14 4Y NC 3 18 4Y En 4 13 4Z 1Z 4 17 NC 13 4Z 1Z 4 17 NC 2Z 5 12 En En 5 16 4Z En 4 12 2Z 5 11 3Z 2Z 6 15 En 2Y 6 En 5 12 2Z 6 16 4Z 2Y 6 12 En 34 11 3Z 2A 7 10 3Y NC 7 14 3Z 2A 7 10 3Y Gnd 8 9 3A 2Y 8 13 NC Gnd 8 9 3A 2A 9 12 3Y Gnd 10 11 3A 1A 1 16 VCC 1A 1 1Y 2 15 4A 1Z 3 P Package NC 7 15 En 34 14 3Z 2Y 8 13 NC 2A 9 12 3Y Gnd 10 11 3A P Package DW Package DW Package Motorola, Inc. 1996 MOTOROLA ANALOG IC DEVICE DATA 20 VCC Rev 1 1 MC75172B MC75174B MAXIMUM RATINGS Rating Symbol Value Unit VCC –0.5, +7.0 Vdc Input Voltage (Data, Enable) Vin +7.0 Vdc Input Current (Data, Enable) Iin –24 mA Applied Output Voltage, when in 3–State Condition (VCC = 5.0 V) Vza –10, +14 Vdc Applied Output Voltage, when VCC = 0 V Vzb ±14 IO Self–Limiting – Tstg –65, +150 °C Power Supply Voltage Output Current Storage Temperature Devices should not be operated at these limits. The “Recommended Operating Conditions” table provides for actual device operation. RECOMMENDED OPERATING CONDITIONS Characteristic Power Supply Voltage Symbol Min Typ Max Unit VCC +4.75 +5.0 +5.25 Vdc Input Voltage (All Inputs) Vin 0 – VCC Vdc Output Voltage in 3–State Condition, or when VCC = 0 V Vcm –7.0 – +12 Vdc Output Current (Normal data transmission) IO –65 – +65 mA Operating Ambient Temperature (see text) EIA–485 EIA–422 TA –40 0 – – +85 +85 °C All limits are not necessarily functional concurrently. ELECTRICAL CHARACTERISTICS (–40°C p TA p 85°C, 4.75 V p VCC p 5.25 V, unless otherwise noted.) Characteristic Output Voltage Single–Ended Voltage IO = 0 High @ IO = –33 mA Low @ IO = +33 mA Differential Voltage Open Circuit (IO = 0) RL = 54 Ω (Figure 1) Symbol Min Typ Max Unit VO VOH VOL 0 – – – 4.0 1.6 6.0 – – VOD1 VOD2 1.5 1.5 3.4 2.3 6.0 5.0 ∆VOD2 VOD2A ∆VOD2A VOD3 ∆VOD3 VOS ∆VOS – – – 1.5 – – – 5.0 2.2 5.0 – 5.0 2.9 5.0 200 – 200 5.0 200 – 200 mVdc Vdc mVdc Vdc mVdc Vdc mVdc IO(off) IOZ –50 –50 0 0 +50 +50 µA IOSR IOS –150 –250 – – +150 +250 mA Vdc Change in Differential*, RL = 54 Ω (Figure 1) Differential Voltage, RL = 100 Ω (Figure 1) Change in Differential*, RL = 100 Ω (Figure 1) Differential Voltage, –7.0 V Vcm 12 V (Figure 2) Change in Differential*, –7.0 V Vcm 12 V (Figure 2) Offset Voltage, RL = 54 Ω (Figure 1) Change in Offset*, RL = 54 Ω (Figure 1) p p p p Output Current (Each Output) Power Off Leakage, VCC = 0, –7.0 V VO 12 V Leakage in 3–State Mode, –7.0 V VO 12 V p p p p Short Circuit Current to Ground Short Circuit Current, –7.0 V VO p p 12 V *Vin switched from 0.8 to 2.0 V. Typical values determined at 25°C ambient and 5.0 V supply. 2 MOTOROLA ANALOG IC DEVICE DATA MC75172B MC75174B ELECTRICAL CHARACTERISTICS (–40°C p TAp 85°C, 4.75 V p VCC p 5.25 V, unless otherwise noted.) Symbol Min Typ Max VIL(A) VIL(B) VIH 0 0 2.0 – – – 0.7 0.8 VCC Current @ Vin = 2.7 V (All Inputs) Current @ Vin = 0.5 V (All Inputs) IIH IIL – –100 0.2 –15 20 – µA Clamp Voltage (All Inputs, Iin = –18 mA) VIK –1.5 – – Vdc Thermal Shutdown Junction Temperature Tjts – +150 – °C Power Supply Current (Outputs Open, VCC = 5.25 V) Outputs Enable Outputs Disabled ICC – – 60 30 70 40 Symbol Min Typ Max tPLH tPHL – – 23 18 30 30 Propagation Delay – Input to Differential Output (Figure 4) Input Low–to–High Input High–to–Low tPLH(D) tPHL(D) – – 15 17 25 25 Differential Output Transition Time (Figure 4) tdr, tdf – 19 25 tSK1 tSK2 tSK3 – – – 0.2 1.5 1.5 – – – Characteristics Inputs Low Level Voltage (Pins 4 & 12, MC75174B only) Low Level Voltage (All Other Pins) High Level Voltage (All Inputs) Unit Vdc mA TIMING CHARACTERISTICS (TA = 25°C, VCC = 5.0 V) Characteristics Propagation Delay – Input to Single–ended Output (Figure 3) Output Low–to–High Output High–to–Low Skew Timing tPLHD – tPHLD for Each Driver Max – Min tPLHD Within a Package Max – Min tPHLD Within a Package Enable Timing Single–ended Outputs (Figure 5) Enable to Active High Output Enable to Active Low Output Active High to Disable (using Enable) Active Low to Disable (using Enable) Enable to Active High Output (MC75172B only) Enable to Active Low Output (MC75172B only) Active High to Disable (using Enable, MC75172B only) Active Low to Disable (using Enable, MC75172B only) Differential Outputs (Figure 6) Enable to Active Output Enable to Active Output (MC75172B only) Enable to 3–State Output Enable to 3–State Output (MC75172B only) MOTOROLA ANALOG IC DEVICE DATA Unit ns ns ns ns ns tPZH(E) tPZL(E) tPHZ(E) tPLZ(E) tPZH(E) tPZL(E) tPHZ(E) tPLZ(E) – – – – – – – – 48 20 35 30 58 28 38 36 60 30 45 50 70 35 50 50 tPZD(E) tPZD(E) tPDZ(E) tPDZ(E) – – – – 47 56 32 40 – – – – ns 3 MC75172B MC75174B Figure 1. VDD Measurement Figure 2. Common Mode Test VCC VCC 375 RL/2 Vin (0.8 or 2.0 V) Vin (0.8 or 2.0 V) VOD2,A RL/2 VOD3 58 + VCM = 12 to –7.0 V 375 VOS Figure 3. Propagation Delay, Single–Ended Outputs 3.0 V 1.5 V 1.5 V 0V tPLH 27 Ω Y Vin Vin 2.3 V VCC tPHL Output Z 15 pF 3.0 V 3.0 V Output Y S.G. VOL VOH tPLH Output Z tPHL 3.0 V 3.0 V Figure 4. Propagation Delay, Differential Outputs 3.0 V VCC Vin Vin 54 50 pF 1.5 V 0V tPLHD VOD VOD S.G. p 1.5 V p tPHLD 1.5 V 50% – 1.5 V 1.5 V 50% – 1.5 V [4.6 V tdf tdr NOTES: 1. S.G. set to: f 1.0 MHz; duty cycle = 50%; tr, tf, 5.0 ns. 2. tSK1 = tPLHD – tPHLD for each driver. 3. tSK2 computed by subtracting the shortest tPLHD from the longest tPLHD of the 4 drivers within a package. 4. tSK3 computed by subtracting the shortest tPHLD from the longest tPHLD of the 4 drivers within a package. 4 MOTOROLA ANALOG IC DEVICE DATA MC75172B MC75174B Figure 5. Enable Timing, Single–Ended Outputs 3.0 V VCC 0 or 3.0 V Vin 1.5 V 1.5 V Vin 0V tPZH(E) Vout 110Ω tPHZ(E) 50 pF 3.0 V VOH 0.5 V 2.3 V Vout S.G. VCC VCC 3.0 V 110Ω 0 or 3.0 V 1.5 V 1.5 V Vin 0V tPZL(E) Vout tPLZ(E) 50 pF Vin 3.0 V Vout 2.3 V 0.5 V S.G. VOL Figure 6. Enable Timing, Differential Outputs 3.0 V VCC 1.5 V Vin 0 or 3.0 V Vin 54 50 pF 1.5 V 0V tPZD(E) VOD tPDZ(E) 3.0 V VOD 1.5 V S.G. 0 Disabled p NOTES: 1. S.G. set to: f 1.0 MHz; duty cycle = 50%; tf, tf, 2. Vin is inverted for Enable measurements. MOTOROLA ANALOG IC DEVICE DATA 1.5 V 0 Active Disabled p 5.0 ns. 5 MC75172B MC75174B Figure 7. Single–Ended Output Voltage versus Output Sink Current Figure 8. Single–Ended Output Voltage versus Temperature 2.0 VOL, OUTPUT VOLTAGE (V) VOL, OUTPUT VOLTAGE (V) 2.0 1.5 1.0 0.5 p 4.75 V VCC TA = 25°C p 5.25 V IOL = 20.0 mA 1.5 1.25 4.75 V 1.0 – 40 0 0 10 20 30 40 50 IOL, OUTPUT CURRENT (mA) 60 70 Figure 9. Single–Ended Output Voltage versus Output Source Current – 20 p VCC p 5.25 V 0 20 40 60 TA, AMBIENT TEMPERATURE (°C) 85 Figure 10. Single–Ended Output Voltage versus Temperature VCC = 5.25 V 4.0 VCC = 5.00 V VOH, OUTPUT VOLTAGE (V) VOH, OUTPUT VOLTAGE (V) 5.0 IOL = 27.8 mA 1.75 4.0 VCC = 4.75 V 3.0 2.0 TA = 25°C IOH = –20.0 mA 3.75 IOH = –27.8 mA 3.5 VCC = 4.75 V 3.25 1.0 0 – 10 – 20 – 30 – 40 – 50 IOH, OUTPUT CURRENT (mA) – 60 – 70 – 40 4.0 3.0 VCC = 5.25 V VCC = 5.0 V 2.0 VCC = 4.75 V 1.0 0.8 or 2.0 V VOD TA = 25°C 0 0 6 IO 10 20 30 40 50 IO, OUTPUT CURRENT (mA) 20 0 40 60 TA, AMBIENT TEMPERATURE (°C) 85 Figure 12. Output Differential Voltage versus Temperature VOD , DIFFERENTIAL OUTPUT VOLTAGE (V) VOD , DIFFERENTIAL OUTPUT VOLTAGE (V) Figure 11. Output Differential Voltage versus Load Current – 20 60 70 4.0 3.0 IO = 20.0 mA IO = 27.8 mA 2.0 1.0 0.8 or 2.0 V 0 –40 –20 IO VOD VCC = 4.75 V 0 20 40 60 TA, AMBIENT TEMPERATURE (°C) 85 MOTOROLA ANALOG IC DEVICE DATA MC75172B MC75174B Figure 13. Output Leakage Current versus Output Voltage Figure 14. Output Leakage Current versus Temperature 20 IOX, IOZ, LEAKAGE CURRENT ( µ A) IOZ, LEAKAGE CURRENT ( µ A) 2.0 1.0 0 15 10 5.0 Vout = 7.0 V –5.0 –1.0 TA = 25°C En = Low, En = High –2.0 –7.0 –3.0 1.0 5.0 9.0 Vz, APPLIED OUTPUT VOLTAGE (V) –10 –20 –40 12 –20 40 0 20 TA, AMBIENT TEMPERATURE (°C) 85 60 Figure 16. Short Circuit Current versus Common Mode Voltage 150 IOS , SHORT CIRCUIT CURRENT (mA) 5.0 0 Enable Pins – 5.0 Driver Inputs – 10 p – 15 4.75 VCC TA = 25°C – 20 – 25 – 0.5 En = Low, En = High or VCC = 0 V –15 Figure 15. Input Current versus Input Voltage I in , INPUT CURRENT ( µ A) Vout = +12 V 0 0.5 1.5 2.5 3.5 Vin, INPUT VOLTAGE (V) MOTOROLA ANALOG IC DEVICE DATA p 5.25 V 4.5 5.5 Normally Low Output 90 30 0 Normally High Output – 30 – 90 –150 –7.0 p –3.0 TA = 25°C 4.75 VCC p 5.25 V 1.0 5.0 9.0 Vz, APPLIED OUTPUT VOLTAGE (V) 12 7 MC75172B MC75174B APPLICATIONS INFORMATION Description The MC75172B and MC75174B are differential line drivers designed to comply with EIA–485 Standard (April 1983) for use in balanced digital multipoint systems containing multiple drivers. The drivers also comply with EIA–422–A and CCITT Recommendations V.11 and X.27. The drivers meet the EIA–485 requirement for protection from damage in the event that two or more drivers attempt to transmit data simultaneoulsy on the same cable. Data rates in excess of 10 MBPS are possible, depending on the cable length and cable characteristics. A single power supply, 5.0 V, ±5%, is required at a nominal current of 60 mA, plus load currents. Outputs Each output (when active) will be a low or a high voltage, which depends on the input state and the load current (see Table 1, 2 and Figures 7 to 10). The graphs apply to each driver, regardless of how many other drivers within the package are supplying load current. Table 1. MC75172B Truth Table Enables Outputs Data Input EN EN Y Z H L H L X H H X X L X X L L H H L H L Z L H L H Z Table 2. MC75174B Truth Table Outputs Data Input Enable Y H L X H H L H L Z Z L H Z H = Logic high, L = Logic low, X = Irrelevant, Z = High impedance The two outputs of a driver are always complementary. A “high” output can only source current out, while a “low” output can only sink current (except for short circuit current – see Figure 16). The outputs will be in the high impedance mode when: a) the Enable inputs are set according to Table 1 or 2; b) VCC is less than 1.5 V; c) the junction temperature exceeds the trip point of the thermal shutdown circuit (see below). When in this condition, the output’s source and sink capability are shut off, and only leakage currents will flow (see Figures 13, 14). Disabled outputs may be taken to any voltage between –7.0 V and 12 V without damage. 8 The drivers are protected from short circuits by two methods: a) Current limiting is provided at each output, in both the source and sink direction, for shorts to any voltage within the range of 12 V to –7.0 V, with respect to circuit ground (see Figure 16). The short circuit current will flow until the fault is removed, or until the thermal shutdown circuit activates (see below). The current limiting circuit has a negative temperature coefficient and requires no resetting upon removal of the fault condition. b) A thermal shutdown circuit disables the outputs when the junction temperature reaches 150°C, ± 20°C. The thermal shutdown circuit has a hysteresis of ≈ 12°C to prevent oscillations. When this circuit activates, the output stage of each driver is put into the high impedance mode, thereby shutting off the output currents. The remainder of the internal circuitry remains biased. The outputs will become active once again as the IC cools down. ā Driver Inputs The driver inputs determine the state of the outputs in accordance with Tables 1 and 2. The driver inputs have a nominal threshold of 1.2 V, and their voltage must be kept within the range of 0 V to VCC for proper operation. If the voltage is taken more than 0.5 V below ground, excessive currents will flow, and proper operation of the drivers will be affected. An open pin is equivalent to a logic high, but good design practices dictate that inputs should never be left open. The characteristics of the driver inputs are shown in Figure 15. This graph is not affected by the state of the Enable pins. Enable Logic Each driver’s outputs are active when the Enable inputs (Pins 4 and 12) are true according to Tables 1 and 2. The Enable inputs have a nominal threshold of 1.2 V and their voltage must be kept within the range of 0 V to VCC for proper operation. If the voltage is taken more than 0.5 V below ground, excessive currents will flow, and proper operation of the drivers will be affected. An open pin is equivalent to a logic high, but good design practices dictate that inputs should never be left open. The Enable input characteristics are shown in Figure 15. Operating Temperature Range The minimum ambient operating temperature is listed as –40°C to meet EIA–485 specifications, and 0°C to meet EIA–422–A specifications. The higher VOD required by EIA–422–A is the reason for the narrower temperature range. MOTOROLA ANALOG IC DEVICE DATA MC75172B MC75174B The maximum ambient operating temperature (applicable to both EIA–485 and EIA–422–A) is listed as 85°C. However, a lower ambient may be required depending on system use (i.e. specifically how many drivers within a package are used) and at what current levels they are operating. The maximum power which may be dissipated within the package is determined by: PD max where: –T A + TJmax R reducing the load current, reducing the ambient temperature, and/or providing a heat sink. System Requirements EIA–485 requires each driver to be capable of transmitting data differentially to at least 32 unit loads, plus an equivalent DC termination resistance of 60Ω, over a common mode voltage of –7.0 to 12 V. A unit load (U.L.), as defined by EIA–485, is shown in Figure 17. qJA Figure 17. Unit Load Definition RθJA = package thermal resistance (typical 70°C/W for the DIP package, 85°C/W for SOIC package); TJmax = max. operating junction temperature, and TA = ambient temperature. I 1.0 mA –7.0 V –3.0 V V Since the thermal shutdown feature has a trip point of 150°C, ± 20°C, TJmax is selected to be 130°C. The power dissipated within the package is calculated from: PD where: = {[(VCC – VOH) • IOH] + VOL • IOL)} each driver = + (VCC • ICC) VCC = the supply voltage; VOH, VOL are measured or estimated from Figures 7 to 10; ICC = the quiescent power supply current (typical 60 mA). As indicated in the equation, the first term (in brackets) must be calculated and summed for each of the four drivers, while the last term is common to the entire package. Example 1: TA = 25°C, IOL = IOH = 55 mA for each driver, VCC = 5.0 V, DIP package. How many drivers per package can be used? Maximum allowable power dissipation is: PD max * 25°C + 1.5 W + 130°C 70°CńW Since the power supply current of 60 mA dissipates 300 mW, that leaves 1.2 W (1.5 W – 0.3 W) for the drivers. From Figures 7 and 9, VOL 1.75 V, and VOH 3.85 V. The power dissipated in each driver is: {(5.0 – 3.85) • 0.055} + (1.75 • 0.055) = 160 mW. Since each driver dissipates 160 mW, the four drivers per package could be used in this application Example 2: TA = 85°C, IOL = 27.8 mA, IOH = 20 mA for each driver, VCC = 5.0 V, SOIC package. How many drivers per package can be used? Maximum allowable power dissipation is: [ PD max + 13085°C°C*ńW85°C + [ 0.53 W Since the power supply current of 60 mA dissipates 300 mW, that leaves 230 mW (530 mW – 300 mW) for the drivers. From Figures 8 and 10 (adjusted for VCC = 5.0 V), VOL 1.38 V, and VOH 4.27 V. The power dissipated in each driver is: [ [ {(5.0 – 4.27) • 0.020} + (1.38 • 0.0278) = 53 mW 12 V 5.0 V –0.8 mA Reprinted from EIA–485, Electronic Industries Association, Washington,DC. A load current within the shaded regions represents an impedance of less than one U.L., while a load current of a magnitude outside the shaded area is greater than one U.L. A system’s total load is the sum of the unit load equivalents of each receiver’s input current, and each disabled driver’s output leakage current. The 60Ω termination resistance mentioned above allows for two 120Ω terminating resistors. Using the EIA–485 requirements (worst case limits), and the graphs of Figures 7 and 9, it can be determined that the maximum current an MC75172B or MC75174B driver will source or sink is 65 mA. [ System Example An example of a typical EIA–485 system is shown in Figure 18. In this example, it is assumed each receiver’s input characteristics correspond to 1.0 U.L. as defined in Figure 17. Each “off” driver, with a maximum leakage of ±50 µA over the common mode range, presents a load of 0.06 U.L. The total load for the active driver is therefore 8.3 unit loads, plus the parallel combination of the two terminating resistors (60Ω). It is up to the system software to control the driver Enable pins to ensure that only one driver is active at any time. [ Termination Resistors Transmission line theory states that, in order to preserve the shape and integrity of a waveform traveling along a cable, the cable must be terminated in an impedance equal to its characteristic impedance. In a system such as that depicted in Figure 18, in which data can travel in both directions, both physical ends of the cable must be terminated. Stubs, leading to each receiver and driver, should be as short as possible. Leaving off the terminations will generally result in reflections which can have amplitudes of several volts above VCC or below ground. These overshoots and undershoots can disrupt the driver and/or receiver operation, create false data, and in some cases damage components on the bus. Since each driver dissipates 53 mW, the use of all four drivers in a package would be marginal. Options include MOTOROLA ANALOG IC DEVICE DATA 9 MC75172B MC75174B Figure 18. Typical EIA–485 System En R R TTL TTL TTL D #2 #1 #3 En TTL D RT #1 5 “off” drivers (@ 0.06 U.L. each), +8 receivers (@ 1.0 U.L. each) = 8.3 Unit Loads RT = 120 Ω at each end of the cable. 120 Ω Twisted Pair En TTL D R TTL #2 #3 En D TTL #4 R TTL #4 TTL R #6 En TTL D RT #6 En R TTL #8 R TTL #7 R TTL #5 TTL D #5 NOTES: 1. Terminating resistors RT must be located at the physical ends of the cable. 2. Stubs should be as short as possible. 3. Circuit ground of all drivers and receivers must be connected via a dedicated wire within the cable. Do not rely on chassis ground or power line ground. 10 MOTOROLA ANALOG IC DEVICE DATA MC75172B MC75174B Comparing System Requirements Characteristic Symbol EIA–485 GENERATOR (DRIVER) Output Impedance (Note 1) Open Circuit Voltage Differential Single–Ended Loaded Differential Voltage Zout VOCD VOCS VOD 50 10 100 Ω 1.5 to 5.0 V, w/54 Ω load p 6.0 V p 6.0 V q 2.0 V or q 0.5 p 6.0 V, w/3.9 kΩ, Load p 6.0 V, w/3.9 kΩ, Load q 2.0 V or q 0.5 VOCD, p 400 mV t 400 mV 1.5 to 6.0 V 6.0 V t ∆VOD t 200 mV Output Common Mode Range VCM –7.0 to +12 V Offset Voltage VOS –1.0 Short Circuit Current ∆VOS IOS Output Rise/Fall Time (Note 2) IOLK tr, tf VOCD, w/100 Ω load w/100 Ω load Not Specified t 200 mV p 250 mA for –7.0 to p 3.0 V p 400 mV p 150 mA to ground Not Specified Not Specified p 100 µA to –0.25 V p 100 µA to ± 0.25 V t VOS t 3.0 V 12 V Leakage Current (VCC = 0) V.11 and X.27 t 100 Ω Not Specified Differential Voltage Balance Offset Voltage Balance EIA–422–A thru 6.0 V p 3.0 V t 400 mV p 150 mA to ground p 0.3 TB, w/54 Ω/1150 pF p 0.1 TB or p 20 ns, w/100 Ω load 0.1 TB or 20 ns, w/100 Ω load ± 200 mV ± 200 mV ± 300 mV –7.0 to 7.0 V –7.0 to 7.0 V load p p RECEIVER Input Sensitivity Vth Input Bias Voltage Vbias p 3.0 V Input Common Mode Range Vcm –7.0 to 12 V Dynamic Input Impedance Rin Spec number of U.L. p 3.0 V q 4 kΩ p 3.0 V q 4 kΩ NOTES: 1. Compliance with V.11 and X.27 (Blue book) output impedance requires external resistors in series with the outputs of the MC75172B and MC75174B. 2. TB = Bit time. Additional Information Copies of the EIA Recommendations (EIA–485 and EIA–422–A) can be obtained from the Electronics Industries Association, Washington, D.C. (202–457–4966). Copies of the CCITT Recommendations (V.11 and X.27) can be obtained from the United States Department of Commerce, Springfield, VA (703–487–4600). MOTOROLA ANALOG IC DEVICE DATA 11 MC75172B MC75174B OUTLINE DIMENSIONS P SUFFIX PLASTIC PACKAGE CASE 648–08 ISSUE R –A– 16 9 1 8 NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. DIMENSION L TO CENTER OF LEADS WHEN FORMED PARALLEL. 4. DIMENSION B DOES NOT INCLUDE MOLD FLASH. 5. ROUNDED CORNERS OPTIONAL. B F C L S –T– SEATING PLANE K H G D 16 PL 0.25 (0.010) M T A M DW SUFFIX PLASTIC PACKAGE CASE 751D–04 (SO–20L) ISSUE E –A– 20 11 –B– 10X M B M 10 J 20X D 0.010 (0.25) M T A B S S F R C –T– 18X G SEATING PLANE K INCHES MIN MAX 0.740 0.770 0.250 0.270 0.145 0.175 0.015 0.021 0.040 0.70 0.100 BSC 0.050 BSC 0.008 0.015 0.110 0.130 0.295 0.305 0_ 10 _ 0.020 0.040 MILLIMETERS MIN MAX 18.80 19.55 6.35 6.85 3.69 4.44 0.39 0.53 1.02 1.77 2.54 BSC 1.27 BSC 0.21 0.38 2.80 3.30 7.50 7.74 0_ 10 _ 0.51 1.01 NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: MILLIMETER. 3. DIMENSIONS A AND B DO NOT INCLUDE MOLD PROTRUSION. 4. MAXIMUM MOLD PROTRUSION 0.150 (0.006) PER SIDE. 5. DIMENSION D DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.13 (0.005) TOTAL IN EXCESS OF D DIMENSION AT MAXIMUM MATERIAL CONDITION. P 0.010 (0.25) 1 M J DIM A B C D F G H J K L M S X 45 _ DIM A B C D F G J K M P R MILLIMETERS MIN MAX 12.65 12.95 7.40 7.60 2.35 2.65 0.35 0.49 0.50 0.90 1.27 BSC 0.25 0.32 0.10 0.25 0_ 7_ 10.05 10.55 0.25 0.75 INCHES MIN MAX 0.499 0.510 0.292 0.299 0.093 0.104 0.014 0.019 0.020 0.035 0.050 BSC 0.010 0.012 0.004 0.009 0_ 7_ 0.395 0.415 0.010 0.029 M Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. “Typical” parameters which may be provided in Motorola data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. Motorola does not convey any license under its patent rights nor the rights of others. Motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury or death may occur. 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Box 20912; Phoenix, Arizona 85036. 1–800–441–2447 or 602–303–5454 JAPAN: Nippon Motorola Ltd.; Tatsumi–SPD–JLDC, 6F Seibu–Butsuryu–Center, 3–14–2 Tatsumi Koto–Ku, Tokyo 135, Japan. 03–81–3521–8315 MFAX: [email protected] – TOUCHTONE 602–244–6609 INTERNET: http://Design–NET.com ASIA/PACIFIC: Motorola Semiconductors H.K. Ltd.; 8B Tai Ping Industrial Park, 51 Ting Kok Road, Tai Po, N.T., Hong Kong. 852–26629298 12 ◊ *MC75172B/D* MOTOROLA ANALOG IC DEVICE DATA MC75172B/D