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| MITSUBISHI DIGITAL ASSP MITSUBISHI DIGITAL ASSP M75176P, M75177P M75176P, M75177P M75178P, M75179P M75178P, M75179P RS-485 TRANSCEIVER RS-485 TRANSCEIVER DESCRIPTION Each of the M75176 to M75179 is a semiconductor IC with a built-in differential driver and a built-in differential receiver both of which meet the EIA standards RS-422A and RS-485. FEATURES Common * 5V single power supply * With output control input (except M75179P) Driver * 54 terminal resistor connectable between outputs. * High output impedance at power-OFF time * Built-in output current limit circuit Receiver * High input sensitivity (200mV max.) * Hysteresis input (50mV typ.) * High input impedance (12k min.) * "H" emitted when input is open (failsafe function) APPLICATION High-speed data transmission interface for digital equipment DESCRIPTION OF FUNCTION The M75176P to M75179P are line interface ICs which meet EIA standards RS-422A and RS-485, and are suitable for long-distance, high-speed data transmission. The M75176P is designed to connect the driver circuit output and the receiver input to each other internally, and serves as a line transceiver. The M75177P/M75178P is designed to connect the receiver circuit output and the driver circuit input internally, and serves as a line repeater. The M75177P and M75178P enter the output enabled state with active "H" and active "L", respectively. The M75179P is equipped with a built-in differential driver and a built-in differential receiver. It does not have an output control input pin but its output impedance at the power-OFF time goes high. PIN CONFIGURATION (TOP VIEW) RECEIVER OUTPUT R 1 8 VCC RECEIVER OUTPUT RE 2 CONTROL INPUT DRIVER OUTPUT DE 3 CONTROL INPUT DRIVER INPUT D 4 7 B 6 A 5 I/O BUS GND M75176P VCC REPEATER OUTPUT 1 8 A RECEIVER INPUT 7 B 6 Z 5 Y DRIVER OUTPUT T 2 OUTPUT CONTROL INPUT EN 3 GND 4 M75177P VCC REPEATER OUTPUT 1 8 A 7 B 6 Z 5 Y DRIVER OUTPUT RECEIVER INPUT T 2 OUTPUT CONTROL INPUT EN 3 GND 4 M75178P VCC 1 8 A RECEIVER INPUT 7 B 6 Z 5 Y DRIVER OUTPUT RECEIVER OUTPUT R 2 DRIVER INPUT D 3 GND 4 M75179P Outline 8P4 1 MITSUBISHI DIGITAL ASSP M75176P, M75177P M75178P, M75179P RS-485 TRANSCEIVER FUNCTION TABLE (a) M75176P Driver INPUTS D H L X (Note 1) Receiver OUTPUTS DE H H L A H L Z B L H Z INPUTS VID VID > 0.2V -0.2V < VID < 0.2V VID < -0.2V X RE L L L H OUTPUTS R H V L Z (b) M75177P/M75178P VID VID > 0.2V -0.2V < VID < 0.2V VID < -0.2V X INPUTS EN (M75177P) H H H L OUTPUTS EN (M75178P) L L L H T H V L Z Y H V L Z Z L V H Z (c) M75179P Driver INPUTS D H L Note 1: VID : X: V: Z: Receiver OUTPUTS Y H L Z L H INPUTS VID VID > 0.2V -0.2V < VID < 0.2V VID < -0.2V OUTPUTS R H V L (A applied voltage) - (B applied voltage) Either "L" or "H" Output state is not defined. High impedance state. 2 MITSUBISHI DIGITAL ASSP M75176P, M75177P M75178P, M75179P RS-485 TRANSCEIVER ABSOLUTE MAXIMUM RATINGS Symbol VCC VID VIE Pd Tstg Parameter Supply voltage Differential input voltage 75177/178/179 Enable input voltage 75176/177/178 Power dissipation (Note 2) Storage temperature Conditions Ratings -0.5 ~ +7 -25 ~ +25 -0.5 ~ +5.5 925 -65 ~ 150 Unit V V V mW C When Ta=25C Note 2: When Ta 25C, do derating according to the attached thermal derating. RECOMMENDED OPERATING CONDITIONS Symbol VCC VI, VIC VID IOH Parameter Supply voltage Bus pin voltage (each pin voltage, in-phase input voltage) Differential input voltage "H" output current Driver Receiver Driver Receiver VOL < 0.45V VOL < 0.5V Min. 4.75 -7 -12 0 0 0 0 0 -20 Limits Typ. 5 Max. 5.25 +12 +12 -60 -400 60 8 16 75 Unit V V V mA mA mA C IOL Topr "L" output current Operating ambient temperature ELECTRICAL CHARACTERISTICS (Driver) (VCC = 5V 5%, Ta = -20 ~ 75C, unless otherwise noted) Symbol VIH VIL VIK |VOD1| |VOD2| |VOD| VOL |VOC| IO IOZ IIH IIL Parameter "H" input voltage "L" input voltage Input clamp voltage Differential output voltage 1 Differential output voltage 2 Differential output voltage variance width In-phase output voltage In-phase output voltage variance width Output current Off-state output current "H" input current "L" input current 75176 75177/178/179 75177/178 Test conditions Min. 2 Limits Typ.* Max. 0.8 -1.5 6 2.42 V 2.18 2.08 5 0.2 3 0.2 1 -0.8 100 300 20 -400 -250 -150 250 250 48 48 V V V mA mA mA mA mA Unit V V V V II=-18mA IO=0mA RL=100 RL=54 RL=54/100 See Fig. 1. See Fig. 1. See Fig. 1. 1.5 2 (Note 3) VOD1/2 1.5 -1 IOS Output short-circuit current VO=12V VO=-7V VCC=0V, VO=-7 ~ +12V VO=-7 ~ +12V VI=2.4V VI=0.4V VO=-7V VO=0V VO=VCC VO=12V Output disable No output load Output enable Output disable 29.5 32.5 mA ICC Supply voltage mA *: The standard value is given on the condition of VCC = 5V and Ta = 25C. Note 3: The standard is 1.9V (min.) when Ta 0C. 3 MITSUBISHI DIGITAL ASSP M75176P, M75177P M75178P, M75179P RS-485 TRANSCEIVER SWITCHING CHARACTERISTICS (Driver) (VCC = 5V, Ta=25C) Symbol tDD tTD tPLH tPHL tPZH tPZL tPHZ tPLZ Parameter Differential output delay time Differential output transition time Output "L - H" propagation delay time Output "H - L" propagation delay time "H" enable time "L" enable time "H" disable time "L" disable time RL=54 CL=50pF RL=27 CL=50pF RL=110 CL=50pF Test conditions See Fig. 2. See Fig. 3. Min. Limits Typ. 13 11 15 12 23 16 11 22 Max. 25 25 25 25 35 35 25 35 Unit ns ns ns ns ns ns ns ns See Figs. 4 & 5. ELECTRICAL CHARACTERISTICS (Receiver) (VCC = 5V 5%, Ta = -20 ~ 75C, unless otherwise noted) Symbol VTH VTL VT+ - VT- VIK VOH VOL Parameter High threshold voltage Low threshold voltage Hysteresis width (Note 4) Enable input clamp voltage "H" output voltage "L" output voltage 75176 IOZ Off-state output current 75177/178 Test conditions VO=2.7V, IO=-0.4mA VO=0.5V, IO=16mA II=-18mA VID=0.2V, IOH=-0.4mA VID=-0.2V VO=0.4 ~ 2.4V VO=0.4V VO=2.4V Other input 0V 75176/177/178 75176 75177/178 VIH=2.7V VIL=0.4V 12 -15 Output enable Output disable VO=12V VO=-7V IOL=8mA IOL=16mA Min. -0.2 50 -1.5 2.7 3.6 0.23 0.30 0.45 0.5 20 -400 20 1 -0.8 20 -100 -400 -85 48 48 Limits Typ.* Max. 0.2 Unit V V mV V V V mA II IIH IIL ri Line input current "H" enable input current "L" enable input current mA mA mA k mA mA IOS ICC Input resistance Output short-circuit current Supply voltage VO=0V No output load *: The standard value is given on the condition of VCC = 5V and Ta = 25C. Note 4: The hysteresis width is the difference between positive threshold voltage VT+ and negative threshold voltage VT-. SWITCHING CHARACTERISTICS (Receiver) (VCC = 5V, Ta=25C) Symbol tPLH tPHL tPZH tPZL tPHZ tPLZ Parameter Output "L - H" propagation delay time Output "H - L" propagation delay time "H" enable time "L" enable time "H" disable time "L" disable time CL=15pF CL=15pF CL=15pF Test conditions See Fig. 6. See Fig. 7. See Fig. 7. Min. Limits Typ. 22 19 9 11 17 22 Max. 35 35 20 20 35 35 Unit ns ns ns ns ns ns 4 MITSUBISHI DIGITAL ASSP M75176P, M75177P M75178P, M75179P RS-485 TRANSCEIVER TEST CIRCUITS Fig. 1 RL / 2 VOD2 RL / 2 VOC Driver differential output voltage 2, in-phase output voltage Fig. 2 3V Input 1.5V 1.5V 0V tDD tDD P.G. (Note 5) Input 50 3V (M75178P is 0V) RL CL (Note 6) Output Output 50% tTD 90% 10% tTD 50% Test circuit I/O waveform Driver differential output delay time and transition time Fig. 3 2.3V RL Output 50 3V (M75178P is 0V) CL (Note 6) tPLH 2.3V Output tPHL 2.3V tPLH 2.3V VOL tPHL VOH 2.3V VOL VOH Input 1.5V 1.5V 0V 3V P.G. (Note 5) Input Test circuit Driver delay time Fig. 4 Output 0V or 3V P.G. (Note 5) Input 50 CL (Note 6) RL (M75178P) Input (M75176/177P) tPZH I/O waveform 3V 1.5V 1.5V 0V tPHZ 0.5V VOH Output 2.3V 0V Test circuit I/O waveform Driver enable/disable time Fig. 5 5V RL 3V or 0V P.G. (Note 5) Input 50 Output CL (Note 6) Output (M75178P) Input (M75176/177P) tPZL 3V 1.5V 1.5V 0V tPLZ 5V VOL 2.3V 0.5V Test circuit I/O waveform Driver enable/disable time Note 5: The pulse generator is PRR 1MHz, duty ratio = 50%, tr 6ns, tf 6ns, ZOUT = 50. 6: CL includes jigs and probe capacitance. 5 MITSUBISHI DIGITAL ASSP M75176P, M75177P M75178P, M75179P RS-485 TRANSCEIVER Fig. 6 3V P.G. (Note 7) Input 50 Output 1.5V CL (Note 8) Input 1.5V 1.5V 0V tPLH tPHL VOH 0V M75177P is 3V Output 1.3V 1.3V VOL Test circuit I/O waveform Receiver propagation delay time Fig. 7 1.5V -1.5V Input 50 S1 Output 2k CL (Note 8) S2 5V P.G. (Note 7) 5k S3 Test circuit (M75177P) Input (M75176/178P) tPZH VOH Output S1 1.5V side S2 open 1.5V 0V S3 closed S1 1.5V side S2 closed S3 open Output 1.5V VOL 3V 1.5V 1.5V 0V (M75177P) Input (M75176/178P) tPZL 1.5V 1.5V 3V 0V 4.5V (M75177P) Input (M75176/178P) tPHZ 1.5V 1.5V 3V 0V (M75177P) Input (M75176/178P) tPLZ 1.5V 1.5V 3V 0V Output 0.5V VOH 1.3V Output 0.5V S1 1.5V side S2 closed S3 closed VOL 1.3V S1 1.5V side S2 closed S3 closed Receiver enable/disable time Note 7: The pulse generator is PRR 1MHz, duty ratio = 50%, tr 6ns, tf 6ns, ZOUT = 50. 8: CL includes jigs and probe capacitance. 6 MITSUBISHI DIGITAL ASSP M75176P, M75177P M75178P, M75179P RS-485 TRANSCEIVER THERMAL DERATING THERMAL DERATING CHARACTERISTIC 1000 50 SUPPLY CURRENT - SUPPLY VOLTAGE CHARACTERISTIC POWER DISSIPATION Pd (mW) 750 SUPPLY CURRENT ICC (mA) 8P4 Unit 40 Output disable EN = 0V 30 Output enable EN = 4.5V 20 M75177P A=0V B=4.5V Ta=25C 0 2 4 6 8 10 500 250 10 0 -20 0 0 20 40 60 80 SUPPLY VOLTAGE VCC (V) AMBIENT TEMPERATURE Ta (C) DRIVER "H" OUTPUT VOLTAGE "L" OUTPUT VOLTAGE - OUTPUT CURRENT CHARACTERISTIC 5 VCC=5V Ta=25C 5 DIFFERENTIAL OUTPUT VOLTAGE IN-PHASE OUTPUT VOLTAGE - OUTPUT CURRENT CHARACTERISTIC DIFFERENTIAL OUTPUT VOLTAGE VOD (V) VCC=5V Ta=25C 5 5 4 4 4 3 VOH Load line RL=100 4 Load line RL=54 VOC 3 3 3 2 VOL 2 2 VOD 1 2 1 1 1 0 0 20 40 60 80 0 100 0 0 20 40 60 80 OUTPUT CURRENT IO (mA) 0 100 OUTPUT CURRENT SOURCE IO (mA) SWITCHING CHARACTERISTIC 4 INPUT VOLTAGE WAVEFORM (V) DIFFERENTIAL OUTPUT VOLTAGE WAVEFORM (V) SWITCHING CHARACTERISTIC 2 I/O VOLTAGE WAVEFORM (V) 6 Y-Z Differential output voltage waveform D input voltage waveform 6 VCC=5V Ta=25C Y output voltage waveform 4 D input voltage waveform 4 0 2 VCC=5V Ta=25C 0 -4 0 20 40 60 80 DIFFERENTIAL OUTPUT DELAY TIME tDD, DIFFERENTIAL OUTPUT TRANSITION TIME tTD (ns) -2 2 Z output voltage waveform 0 0 20 40 60 80 OUTPUT "L-H" PROPAGATION DELAY TIME tPLH, OUTPUT "H-L" PROPAGATION DELAY TIME tPHL (ns) IN-PHASE OUTPUT VOLTAGE VOC (V) "H" OUTPUT VOLTAGE VOH (V) "L" OUTPUT VOLTAGE VLO (V) 7 MITSUBISHI DIGITAL ASSP M75176P, M75177P M75178P, M75179P RS-485 TRANSCEIVER RECEIVER I/O TRANSMISSION CHARACTERISTIC (AR) INPUT CURRENT - INPUT VOLTAGE CHARACTERISTIC (A) 2.4 5 VIC=0V OUTPUT VOLTAGE VO (V) 4 INPUT CURRENT II (mA) VCC=5V IO=0mA Ta=25C B=0V Ta=25C 1.6 0.8 3 VIC=-7V 0 VCC=5V -0.8 VCC=0V 2 VIC=12V 1 -1.6 0 -160 -80 0 80 160 -20 -10 0 10 20 INPUT VOLTAGE VID (mV) INPUT VOLTAGE VI (V) "H" OUTPUT VOLTAGE - "H" OUTPUT CURRENT CHARACTERISTIC "L" OUTPUT VOLTAGE - "L" OUTPUT CURRENT CHARACTERISTIC 5 "H" OUTPUT VOLTAGE VOH (V) 4 VCC=5.25V VCC=5V "L" OUTPUT VOLTAGE VOL (V) VID=0.2V Ta=25C 0.5 VID=-0.2V Ta=25C 0.4 VCC=4.75V 5V 5.75V 3 VCC=4.75V 0.3 2 0.2 1 0.1 0 0 -20 -40 -60 -80 -100 "H" OUTPUT CURRENT IOH (mA) 0 0 4 8 12 16 20 "L" OUTPUT CURRENT IOL (mA) SWITCHING CHARACTERISTIC SWITCHING CHARACTERISTIC I/O VOLTAGE WAVEFORM (V) I/O VOLTAGE WAVEFORM (V) 6 VCC=5V B=1.5V Ta=25C A input voltage waveform R output voltage waveform 6 R output voltage waveform 4 VCC=5V B=1.5V Ta=25C 4 2 2 A input voltage waveform 0 0 0 20 40 60 80 0 20 40 60 80 OUTPUT "L-H" PROPAGATION DELAY TIME tPLH (ns) OUTPUT "H-L" PROPAGATION DELAY TIME tPHL (ns) 8 MITSUBISHI DIGITAL ASSP M75176P, M75177P M75178P, M75179P RS-485 TRANSCEIVER APPLICATION EXAMPLE M75177P M75176P M75176P Data input RT RT RT RT Data output Data output Data input M75178P Data output Data input M75176P RT=Terminal resistor 9 |
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