19-1800; Rev 0; 9/00 ±15kV ESD-Protected, Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers Features ♦ ESD Protection for RS-485 I/O Pins ±15kV, Human Body Model ♦ True Fail-Safe Receiver While Maintaining EIA/TIA-485 Compatibility ♦ Enhanced Slew-Rate Limiting Facilitates Error-Free Data Transmission (MAX3080E–MAX3085E/MAX3089E) ♦ 1nA Low-Current Shutdown Mode (Except MAX3081E/MAX3084E/MAX3087E) ♦ Pin-Selectable Full/Half-Duplex Operation (MAX3089E) ♦ Phase Controls to Correct for Twisted-Pair Reversal (MAX3089E) ♦ Allow Up to 256 Transceivers on the Bus Applications RS-422/RS-485 Communications Level Translators Transceivers for EMI-Sensitive Applications Industrial-Control Local Area Networks Ordering Information PART TEMP. RANGE MAX3080ECSD 0°C to +70°C MAX3080ECPD MAX3080EESD MAX3080EEPD 0°C to +70°C -40°C to +85°C -40°C to +85°C PIN-PACKAGE 14 SO 14 Plastic DIP 14 SO 14 Plastic DIP Ordering Information continued at end of data sheet. Selector Guide Part Half/Full Duplex Data Rate (Mbps) SlewRate Limited LowPower Shutdown Receiver/ Driver Enable Quiescent Transceivers Current On (µA) Bus (µA) Pin Count IndustryStandard Pinout MAX3080E Full 0.115 Yes Yes Yes 375 256 14 75180 MAX3081E Full 0.115 Yes No No MAX3082E Half 0.115 Yes Yes Yes 375 256 8 75179 375 256 8 75176 MAX3083E Full 0.5 Yes Yes MAX3084E Full 0.5 Yes No Yes 375 256 14 75180 No 375 256 8 MAX3085E Half 0.5 Yes 75179 Yes Yes 375 256 8 75176 MAX3086E Full 10 MAX3087E Full 10 No Yes Yes 375 256 14 75180 No No No 375 256 8 MAX3088E Half 75179 10 No Yes Yes 375 256 8 75176 MAX3089E Selectable Selectable Selectable Yes Yes 375 256 14 75180* *Pin compatible with 75180, with additional features implemented using pins 1, 6, 8, and 13. ________________________________________________________________ Maxim Integrated Products 1 For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800. For small orders, phone 1-800-835-8769. MAX3080E–MAX3089E General Description The MAX3080E–MAX3089E are ±15kV electrostatic discharge (ESD)-protected, high-speed transceivers for RS485/RS-422 communication that contain one driver and one receiver. These devices feature fail-safe circuitry, which guarantees a logic-high receiver output when the receiver inputs are open or shorted. This means that the receiver output will be a logic high if all transmitters on a terminated bus are disabled (high impedance). The MAX3080E/MAX3081E/MAX3082E feature reduced slew-rate drivers that minimize EMI and reduce reflections caused by improperly terminated cables, allowing error-free data transmission up to 115kbps. The MAX3083E/MAX3084E/MAX3085E offer higher driver output slew-rate limits, allowing transmit speeds up to 500kbps. The MAX3086E/MAX3087E/ MAX3088Es’ driver slew rates are not limited, making transmit speeds up to 10Mbps possible. The MAX3089E’s slew rate is selectable between 115kbps, 500kbps, and 10Mbps by driving a selector pin with a single three-state driver. All devices feature enhanced ESD protection. All transmitter outputs and receiver inputs are protected to ±15kV using the Human Body Model. These transceivers typically draw 375µA of supply current when unloaded, or when fully loaded with the drivers disabled. All devices have a 1/8-unit-load receiver input impedance that allows up to 256 transceivers on the bus. The MAX3082E/MAX3085E/MAX3088E are intended for halfduplex communications, while the MAX3080E/MAX3081E/ MAX3083E/MAX3084E/MAX3086E/MAX3087E are intended for full-duplex communications. The MAX3089E is selectable between half-duplex and full-duplex operation. It also features independently programmable receiver and transmitter output phase via separate pins. MAX3080E–MAX3089E ±15kV ESD-Protected, Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers ABSOLUTE MAXIMUM RATINGS Supply Voltage (VCC) ............................................................+7V Control Input Voltage (RE, DE)...................-0.3V to (VCC + 0.3V) Special Input Voltage (H/F, SRL, TXP, RXP)..............................-0.3V to (VCC + 0.3V) Driver Input Voltage (DI).............................-0.3V to (VCC + 0.3V) Driver Output Voltage (A, B, Y, Z)........................................±13V Receiver Input Voltage (A, B) ..............................................±13V Receiver Input Voltage, Full Duplex (A, B) ..........................±25V Receiver Output Voltage (RO)....................-0.3V to (VCC + 0.3V) Continuous Power Dissipation 8-Pin Plastic DIP (derate 9.09mW/°C above +70°C) ...727mW 8-Pin SO (derate 5.88mW/°C above +70°C)................471mW 14-Pin Plastic DIP (derate 10.0mW/°C above +70°C) ....800mW 14-Pin SO (derate 8.33mW/°C above +70°C)..............667mW Operating Temperature Ranges MAX308_EC_ _ ...................................................0°C to +70°C MAX308_EE_ _ ................................................-40°C to +85°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10s) .................................+300°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 in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. DC ELECTRICAL CHARACTERISTICS (VCC = +5V ±5%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5V and TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS 5 V DRIVER Differential Driver Output (No Load) VOD1 Differential Driver Output VOD2 Change-in-Magnitude of Differential Output Voltage (Note 2) ∆VOD Figure 5, R = 50Ω or R = 27Ω 0.2 V VOC Figure 5, R = 50Ω or R = 27Ω 3 V Change-in-Magnitude of Common-Mode Voltage (Note 2) ∆VOC Figure 5, R = 50Ω or R = 27Ω 0.2 V Input High Voltage VIH1 DE, DI, RE, H/F, TXP, RXP Input Low Voltage VIL1 DI Input Hysteresis VHYS DE, DI, RE, H/F, TXP, RXP MAX3080E–MAX3085E, and MAX3089E with SRL = VCC or unconnected Driver Common-Mode Output Voltage Figure 5 Figure 5, R = 50Ω (RS-422) 2.0 Figure 5, R = 27Ω (RS-485) 1.5 V 2.0 V 0.8 100 mV IIN1 DE, DI, RE Input High Voltage Input Middle Voltage IIN2 VIH2 VIM2 H/F, TXP, RXP, internal pulldown SRL SRL (Note 3) Input Low Voltage VIL2 SRL SRL Input Current IIN3 Input Current (A and B) IIN4 DE = GND, VCC = GND or 5.25V VIN = 12V 125 VIN = -7V -75 Output Leakage (Y and Z) Full Duplex IO DE = GND, VCC = GND or 5.25V VIN = 12V Driver Short-Circuit Output Current (Note 4) VOD1 SRL Input Current 2 ±2 10 VCC - 0.8 0.4VCC SRL = VCC -7V ≤ VOUT ≤ VCC 0V ≤ VOUT ≤ 12V 0V ≤ VOUT ≤ VCC 40 V V 0.8 V -75 VIN = -7V µA 0.6VCC 75 SRL = GND (Note 3) V 125 -100 µA µA µA -250 250 ±25 _______________________________________________________________________________________ mA ±15kV ESD-Protected, Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers MAX3080E–MAX3089E DC ELECTRICAL CHARACTERISTICS (continued) (VCC = +5V ±5%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5V and TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS -200 -125 -50 mV 0.4 mV V V ±1 µA RECEIVER Receiver Differential Threshold Voltage VTH Receiver Input Hysteresis Receiver Output High Voltage Receiver Output Low Voltage ∆VTH VOH VOL IO = -4mA, VID = -50mV IO = 4mA, VID = -200mV Three-State Output Current at Receiver IOZR 0.4V ≤ VO ≤ 2.4V Receiver Input Resistance RIN -7V ≤ VCM ≤ 12V 96 Receiver Output Short-Circuit Current IOSR 0V ≤ VRO ≤ VCC ±7 -7V ≤ VCM ≤ 12V 25 VCC -1.5 kΩ ±95 mA SUPPLY CURRENT Supply Current ICC Supply Current in Shutdown Mode ESD Protection for Y, Z, A, B ISHDN No load, RE = DI = GND or VCC, SRL = VCC DE = VCC 430 DE = GND 375 600 No load, RE = DI = GND or VCC, SRL = GND DE = VCC 475 1000 DE = GND 420 800 DE = GND, V RE = VCC 0.001 10 Human Body Model ±15 900 µA µA µA kV Note 1: All currents into the device are positive; all currents out of the device are negative. All voltages are referred to device ground unless otherwise noted. Note 2: ∆VOD and ∆VOC are the changes in VOD and VOC, respectively, when the DI input changes state. Note 3: The SRL pin is internally biased to VCC / 2 by a 100kΩ/100kΩ resistor-divider. It is guaranteed to be VCC / 2 if left unconnected. Note 4: Maximum current level applies to peak current just prior to foldback-current limiting; minimum current level applies during current limiting. _______________________________________________________________________________________ 3 MAX3080E–MAX3089E ±15kV ESD-Protected, Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers SWITCHING CHARACTERISTICS—MAX3080E/MAX3081E/MAX3082E, and MAX3089E with SRL = Unconnected (VCC = +5V ±5%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5V and TA = +25°C.) PARAMETER Driver Input-to-Output SYMBOL tDPLH tDPHL CONDITIONS Figures 7 and 9, RDIFF = 54Ω, CL1 = CL2 = 100pF Driver Output Skew | tDPLH - tDPHL | tDSKEW Figures 7 and 9, RDIFF = 54Ω, CL1 = CL2 = 100pF Driver Rise or Fall Time tDR, tDF Figures 7 and 9, RDIFF = 54Ω, CL1 = CL2 = 100pF MIN TYP MAX 500 2030 2600 500 2030 2600 -3 ±200 ns 1320 2500 ns 667 ns Maximum Data Rate fMAX Driver Enable to Output High tDZH Figures 8 and 10, CL = 100pF, S2 closed 3500 ns Driver Enable to Output Low tDZL Figures 8 and 10, CL = 100pF, S1 closed 3500 ns Driver Disable Time from Low tDLZ Figures 8 and 10, CL = 15pF, S1 closed 100 ns Driver Disable Time from High tDHZ Figures 8 and 10, CL = 15pF, S2 closed 100 ns Receiver Input to Output | tRPLH - tRPHL | Differential Receiver Skew 115 UNITS kbps tRPLH, tRPHL Figures 11 and 13; | VID | ≥ 2.0V; rise and fall time of VID ≤ 15ns 127 200 ns tRSKD Figures 11 and 13; | VID | ≥ 2.0V; rise and fall time of VID ≤ 15ns 3 ±30 ns Receiver Enable to Output Low tRZL Figures 6 and 12, CL = 100pF, S1 closed 20 50 ns Receiver Enable to Output High tRZH Figures 6 and 12, CL = 100pF, S2 closed 20 50 ns Receiver Disable Time from Low tRLZ Figures 6 and 12, CL = 100pF, S1 closed 20 50 ns Receiver Disable Time from High tRHZ Figures 6 and 12, CL = 100pF, S2 closed 20 50 ns 200 600 ns Time to Shutdown tSHDN (Note 5) 50 Driver Enable from Shutdown to Output High tDZH(SHDN) Figures 8 and 10, CL = 15pF, S2 closed 6000 ns Driver Enable from Shutdown to Output Low tDZL(SHDN) Figures 8 and 10, CL = 15pF, S1 closed 6000 ns Receiver Enable from ShutdowntRZH(SHDN) to-Output High Figures 6 and 12, CL = 100pF, S2 closed 3500 ns Receiver Enable from Shutdownto-Output Low Figures 6 and 12, CL = 100pF, S1 closed 3500 ns 4 tRZL(SHDN) _______________________________________________________________________________________ ±15kV ESD-Protected, Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers (VCC = +5V ±5%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5V and TA = +25°C.) PARAMETER Driver Input-to-Output SYMBOL tDPLH tDPHL CONDITIONS Figures 7 and 9, RDIFF = 54Ω, CL1 = CL2 = 100pF Driver Output Skew | tDPLH - tDPHL | tDSKEW Figures 7 and 9, RDIFF = 54Ω, CL1 = CL2 = 100pF Driver Rise or Fall Time tDR, tDF Figures 7 and 9, RDIFF = 54Ω, CL1 = CL2 = 100pF MIN TYP MAX 250 720 1000 250 720 1000 -3 ±100 ns 530 750 ns 200 ns Maximum Data Rate fMAX Driver Enable to Output High tDZH Figures 8 and 10, CL = 100pF, S2 closed 2500 ns Driver Enable to Output Low tDZL Figures 8 and 10, CL = 100pF, S1 closed 2500 ns Driver Disable Time from Low tDLZ Figures 8 and 10, CL = 15pF, S1 closed 100 ns Driver Disable Time from High tDHZ Figures 8 and 10, CL = 15pF, S2 closed 100 ns Receiver Input to Output | tRPLH - tRPHL | Differential Receiver Skew 500 UNITS kbps tRPLH, tRPHL Figures 11 and 13; | VID | ≥ 2.0V; rise and fall time of VID ≤ 15ns 127 200 ns tRSKD Figures 11 and 13; | VID | ≥ 2.0V; rise and fall time of VID ≤ 15ns 3 ±30 ns Receiver Enable to Output Low tRZL Figures 6 and 12, CL = 100pF, S1 closed 20 50 ns Receiver Enable to Output High tRZH Figures 6 and 12, CL = 100pF, S2 closed 20 50 ns Receiver Disable Time from Low tRLZ Figures 6 and 12, CL = 100pF, S1 closed 20 50 ns Receiver Disable Time from High tRHZ Figures 6 and 12, CL = 100pF, S2 closed 20 50 ns 200 600 ns Time to Shutdown tSHDN (Note 5) 50 Driver Enable from Shutdown-to-Output High tDZH(SHDN) Figures 8 and 10, CL = 15pF, S2 closed 4500 ns Driver Enable from Shutdown-to-Output Low tDZL(SHDN) Figures 8 and 10, CL = 15pF, S1 closed 4500 ns Receiver Enable from Shutdown-to-Output High tRZH(SHDN) Figures 6 and 12, CL = 100pF, S2 closed 3500 ns Receiver Enable from Shutdown-to-Output Low tRZL(SHDN) Figures 6 and 12, CL = 100pF, S1 closed 3500 ns _______________________________________________________________________________________ 5 MAX3080E–MAX3089E SWITCHING CHARACTERISTICS—MAX3083E/MAX3084E/MAX3085E, and MAX3089E with SRL = VCC MAX3080E–MAX3089E ±15kV ESD-Protected, Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers SWITCHING CHARACTERISTICS—MAX3086E/MAX3087E/MAX3088E, and MAX3089E with SRL = GND (VCC = +5V ±5%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5V and TA = +25°C.) PARAMETER Driver Input-to-Output SYMBOL tDPLH tDPHL CONDITIONS MIN Figures 7 and 9, RDIFF = 54Ω, CL1 = CL2 = 100pF TYP MAX 34 60 34 60 UNITS ns Driver Output Skew | tDPLH - tDPHL | tDSKEW Figures 7 and 9, RDIFF = 54Ω, CL1 = CL2 = 100pF -2.5 ±10 ns Driver Rise or Fall Time tDR, tDF Figures 7 and 9, RDIFF = 54Ω, CL1 = CL2 = 100pF 14 25 ns Maximum Data Rate fMAX Driver Enable to Output High tDZH Figures 8 and 10, CL = 100pF, S2 closed 150 ns Driver Enable to Output Low tDZL Figures 8 and 10, CL = 100pF, S1 closed 150 ns Driver Disable Time from Low tDLZ Figures 8 and 10, CL = 15pF, S1 closed 100 ns tDHZ Figures 8 and 10, CL = 15pF, S2 closed 100 ns Driver Disable Time from High Receiver Input-to-Output | tRPLH - tRPHL | Differential Receiver Skew 10 Mbps tRPLH, tRPHL Figures 11 and 13; | VID | ≥ 2.0V; rise and fall time of VID ≤ 15ns 106 150 ns tRSKD Figures 11 and 13; | VID | ≥ 2.0V; rise and fall time of VID ≤ 15ns 0 ±10 ns Receiver Enable to Output Low tRZL Figures 6 and 12, CL = 100pF, S1 closed 20 50 ns Receiver Enable to Output High tRZH Figures 6 and 12, CL = 100pF, S2 closed 20 50 ns Receiver Disable Time from Low tRLZ Figures 6 and 12, CL = 100pF, S1 closed 20 50 ns Receiver Disable Time from High tRHZ Figures 6 and 12, CL = 100pF, S2 closed 20 50 ns 200 600 ns Time to Shutdown tSHDN (Note 5) 50 Driver Enable from Shutdown-to-Output High tDZH(SHDN) Figures 8 and 10, CL = 15pF, S2 closed 250 ns Driver Enable from Shutdown-to-Output Low tDZL(SHDN) Figures 8 and 10, CL = 15pF, S1 closed 250 ns Receiver Enable from Shutdown-to-Output High tRZH(SHDN) Figures 6 and 12, CL = 100pF, S2 closed 3500 ns Receiver Enable from Shutdown-to-Output Low tRZL(SHDN) Figures 6 and 12, CL = 100pF, S1 closed 3500 ns Note 5: The device is put into shutdown by bringing RE high and DE low. If the enable inputs are in this state for less than 50ns, the device is guaranteed not to enter shutdown. If the enable inputs are in this state for at least 600ns, the device is guaranteed to have entered shutdown. 6 _______________________________________________________________________________________ ±15kV ESD-Protected, Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers A DE = GND B 375 A B: MAX3080E–MAX3085E, MAX3089E WITH SRL = OPEN OR VCC B 325 0 20 40 60 MAX3080/3089 TOC-3 MAX3080/3089 TOC-2 2 1 3 0 5 4 2 1 3 5 4 TEMPERATURE (°C) OUTPUT LOW VOLTAGE (V) OUTPUT HIGH VOLTAGE (V) SHUTDOWN CURRENT vs. TEMPERATURE RECEIVER OUTPUT LOW VOLTAGE vs. TEMPERATURE RECEIVER OUTPUT HIGH VOLTAGE vs. TEMPERATURE 14 12 10 8 6 IRO = 8mA 0.45 4 4.5 0.40 IRO = 8mA 4.4 OUTPUT VOLTAGE (V) 16 0.50 OUTPUT LOW VOLTAGE (V) MAX3080/3089 TOC-1 20 18 0.35 0.30 0.25 0.20 0 0 20 40 60 100 80 4.1 4.0 3.8 0.10 -60 -40 -20 4.2 3.9 0.15 2 4.3 -60 -40 -20 0 20 40 60 80 -60 -40 100 -20 0 20 40 60 80 100 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) RECEIVER PROPAGATION DELAY (500kbps MODE) vs. TEMPERATURE RECEIVER PROPAGATION DELAY (10Mbps MODE) vs. TEMPERATURE DRIVER PROPAGATION DELAY (115kbps MODE) vs. TEMPERATURE CLOAD = 100pF 135 130 125 120 112 CLOAD = 100pF 110 PROPAGATION DELAY (ns) MAX3080/3089 TOC-7 140 108 106 104 102 100 98 2.20 MAX3080/3089 TOC-9 SHUTDOWN CURRENT (nA) 0 100 80 10 0 0 -60 -40 -20 15 5 10 300 PROPAGATION DELAY (ns) 20 Rt = 54Ω 2.15 PROPAGATION DELAY (µs) 350 30 20 MAX3080/3089 TOC-4 400 40 25 MAX3080/3089 TOC-5 425 50 30 OUTPUT CURRENT (mA) 450 60 MAX3080/3089 TOC-8 475 A: MAX3086E/MAX3087E/MAX3088E, MAX3089E WITH SRL = GND DE = VCC OUTPUT CURRENT (mA) 500 MAX3080/3089 TOC-16 NO-LOAD SUPPLY CURRENT (µA) 525 OUTPUT CURRENT vs. RECEIVER OUTPUT HIGH VOLTAGE OUTPUT CURRENT vs. RECEIVER OUTPUT LOW VOLTAGE NO-LOAD SUPPLY CURRENT vs. TEMPERATURE 2.10 2.05 2.00 1.95 96 115 94 -60 -40 -20 0 20 40 TEMPERATURE (°C) 60 80 100 1.90 -60 -40 -20 0 20 40 TEMPERATURE (°C) 60 80 100 -60 -40 -20 0 20 40 60 80 100 TEMPERATURE (°C) _______________________________________________________________________________________ 7 MAX3080E–MAX3089E Typical Operating Characteristics (VCC = +5V, TA = +25°C, unless otherwise noted.) Typical Operating Characteristics (continued) (VCC = +5V, TA = +25°C, unless otherwise noted.) 760 720 680 640 600 50 Rt = 54Ω 1.89 45 40 35 30 520 20 -60 -40 -20 0 20 40 60 80 100 1.87 1.86 1.85 1.83 0 -60 -40 -20 20 40 60 80 100 -60 -40 -20 0 40 20 60 80 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) DRIVER OUTPUT CURRENT vs. DIFFERENTIAL OUTPUT VOLTAGE OUTPUT CURRENT vs. DRIVER OUTPUT LOW VOLTAGE OUTPUT CURRENT vs. DRIVER OUTPUT HIGH VOLTAGE 0.1 100 80 60 40 2 3 4 DIFFERENTIAL OUTPUT VOLTAGE (V) 5 -60 -50 -40 -30 -10 0 1 -70 -20 20 0.01 MAX3080/3089 TOC-27 OUTPUT CURRENT (mA) 1 -90 -80 OUTPUT CURRENT (mA) 10 120 100 -100 MAX3080-25 140 MAX3080 TOC-12 100 0 1.88 1.84 25 560 8 1.90 OUTPUT VOLTAGE (V) 800 Rt = 54Ω 55 DRIVER DIFFERENTIAL OUTPUT VOLTAGE vs. TEMPERATURE MAX3080/3089 TOC-11 840 60 PROPAGATION DELAY (ns) Rt = 54Ω 880 PROPAGATION DELAY (ns) MAX3080/3089 TOC-10 920 DRIVER PROPAGATION DELAY (10Mbps MODE) vs. TEMPERATURE MAX3080/3089 TOC-13 DRIVER PROPAGATION DELAY (500kbps MODE) vs. TEMPERATURE OUTPUT CURRENT (mA) MAX3080E–MAX3089E ±15kV ESD-Protected, Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers 0 0 2 4 6 8 OUTPUT LOW VOLTAGE (V) 10 12 -8 -6 -4 -2 0 2 OUTPUT HIGH VOLTAGE (V) _______________________________________________________________________________________ 4 6 ±15kV ESD-Protected, Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers (VCC = +5V, TA = +25°C, unless otherwise noted.) RECEIVER PROPAGATION DELAY MAX3086E/MAX3087E/MAX3088E AND MAX3089E WITH SRL = GND RECEIVER PROPAGATION DELAY MAX3080E–MAX3085E AND MAX3089E WITH SRL = OPEN OR VCC MAX3080/3089 TYP-18 MAX3080/3089 TYP-17 VA - VB 2V/div VA - VB 2V/div RO 5V/div RO 5V/div 50ns/div 50ns/div DRIVER PROPAGATION DELAY MAX3080E/MAX3081E/MAX3082E AND MAX3089E WITH SRL = OPEN MAX3080/3089 TYP-20 DI 5V/div VY - VZ 2.5V/div 2µs/div DRIVER PROPAGATION DELAY MAX3086E/MAX3087E/MAX3088E AND MAX3089E WITH SRL = GND DRIVER PROPAGATION DELAY MAX3083E/MAX3084E/MAX3085E AND MAX3089E WITH SRL = VCC MAX3080/3089 TYP-22 MAX3080/3089 TYP-21 DI 5V/div VY - VZ 2.5V/div 500ns/div DI 5V/div VY - VZ 2.5V/div 50ns/div _______________________________________________________________________________________ 9 MAX3080E–MAX3089E Typical Operating Characteristics (continued) MAX3080E–MAX3089E ±15kV ESD-Protected, Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers Pin Description PIN MAX3080E MAX3081E MAX3082E MAX3083E MAX3084E MAX3085E MAX3086E MAX3087E MAX3088E FULL-DUPLEX DEVICES 10 MAX3089E HALFDUPLEX DEVICES FULLDUPLEX MODE HALFDUPLEX MODE NAME FUNCTION — — — 1 1 H/F Half/Full-Duplex Selector Pin. Connect H/F to VCC for halfduplex mode; connect to GND or leave unconnected for full-duplex mode. 2 2 1 2 2 RO Receiver Output. When RE is low and if A - B ≥ -50mV, RO will be high; if A - B ≤ -200mV, RO will be low. 3 — 2 3 3 RE Receiver Output Enable. Drive RE low to enable RO; RO is high impedance when RE is high. Drive RE high and DE low to enter low-power shutdown mode. 4 — 3 4 4 DE Driver Output Enable. Drive DE high to enable driver outputs. These outputs are high impedance when DE is low. Drive RE high and DE low to enter low-power shutdown mode. 5 3 4 5 5 DI Driver Input. With DE high, a low on DI forces noninverting output low and inverting output high. Similarly, a high on DI forces non-inverting output high and inverting output low. — — — 6 6 SRL Slew-Rate-Limit Selector Pin. Connect SRL to GND for 10Mbps communication rate; connect to VCC for 500kbps communication rate. Leave unconnected for 115kbps communication rate. 6, 7 4 5 7 7 GND Ground — — — 8 8 TXP Transmitter Phase. Connect TXP to GND, or leave floating for normal transmitter phase/polarity. Connect to VCC to invert the transmitter phase/polarity. 9 5 — 9 — Y Noninverting Driver Output — — — — 9 Y Noninverting Receiver Input and Noninverting Driver Output* 10 6 — 10 — Z Inverting Driver Output — — — — 10 Z Inverting Receiver Input and Inverting Driver Output* 11 7 — 11 — B Inverting Receiver Input — — — — 11 B Receiver Input Resistors* — — 7 — — B Inverting Receiver Input and Inverting Driver Output ______________________________________________________________________________________ ±15kV ESD-Protected, Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers PIN MAX3080E MAX3081E MAX3082E MAX3083E MAX3084E MAX3085E MAX3086E MAX3087E MAX3088E FULL-DUPLEX DEVICES MAX3089E NAME HALFDUPLEX DEVICES FULLDUPLEX MODE HALFDUPLEX MODE FUNCTION 12 8 — 12 — A Noninverting Receiver Input — — — — 12 A Receiver Input Resistors* — — 6 — — A Noninverting Receiver Input and Noninverting Driver Output — — — 13 13 RXP Receiver Phase. Connect RXP to GND, or leave unconnected for normal transmitter phase/polarity. Connect to VCC to invert the receiver phase/polarity: 14 1 8 14 14 VCC Positive Supply 4.75V ≤ VCC ≤ 5.25V 1, 8, 13 — — — — N.C. Not Connected. Not internally connected. *(MAX3089E only) In half-duplex mode, the driver outputs serve as receiver inputs. The full-duplex receiver inputs (A and B) will still have a 1/8-unit load, but are not connected to the receiver. Function Tables MAX3080E/MAX3083E/MAX3086E MAX3081E/MAX3084E/MAX3087E TRANSMITTING TRANSMITTING INPUTS INPUT OUTPUTS OUTPUTS RE DE DI Z Y DI Z Y X 1 1 0 1 1 0 1 0 0 1 0 X 1 0 1 0 0 X High-Z 1 0 X High-Z Shutdown RECEIVING RECEIVING INPUTS OUTPUT INPUTS OUTPUT A-B RO ≥ -0.05V 1 RE DE A-B RO ≤ -0.2V 0 0 X ≥ -0.05V 1 Open/shorted 1 0 X ≤ -0.2V 0 0 X Open/shorted 1 1 1 X High-Z 1 0 X Shutdown X = Don’t care Shutdown mode, driver and receiver outputs high impedance ______________________________________________________________________________________ 11 MAX3080E–MAX3089E Pin Description (continued) MAX3080E–MAX3089E ±15kV ESD-Protected, Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers Function Tables (continued) MAX3082E/MAX3085E/MAX3088E MAX3089E TRANSMITTING TRANSMITTING INPUTS INPUTS OUTPUTS OUTPUTS RE DE DI B/Z A/Y TXP RE DE DI Z Y X 1 1 0 1 0 X 1 1 0 1 X 1 0 1 0 0 X 1 0 1 0 0 0 X High-Z High-Z 1 X 1 1 1 0 1 0 X 1 X 1 0 0 1 X 0 0 X High-Z High-Z X 1 0 X Shutdown Shutdown RECEIVING INPUTS OUTPUT RE DE A-B RO 0 X ≥ -0.05V 1 0 X ≤ -0.2V 0 H/F RXP RE DE A-B Y-Z RO 0 X Open/shorted 1 0 0 0 X ≥ -0.05V X 1 1 1 X High-Z 0 0 0 X ≤ -0.2V X 0 1 0 X Shutdown 0 1 0 X ≥ -0.05V X 0 0 1 0 X ≤ -0.2V X 1 1 0 0 0 X ≥ -0.05V 1 1 0 0 0 X ≤ -0.2V 0 1 1 0 0 X ≥ -0.05V 0 1 1 0 0 X ≤ -0.2V 1 0 0 0 X Open/ shorted X 1 1 0 0 0 X Open/ shorted 1 0 1 0 X Open/ shorted X 0 1 1 0 0 X Open/ shorted 0 X X 1 1 X X High-Z X X 1 0 X X Shutdown X = Don’t care Shutdown mode, driver and receiver outputs high impedance 12 RECEIVING INPUTS OUTPUT ______________________________________________________________________________________ ±15kV ESD-Protected, Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers VCC DE 4 N.C. 1 13 N.C. RE 3 12 A DE 4 11 B DI 5 10 Z D GND 6 GND 7 9 Y 8 N.C. VCC RE 0.1µF 14 14 VCC R RO 2 9 5 DI Y MAX3080E MAX3083E MAX3086E Rt D MAX3080E–MAX3089E TOP VIEW RO R 10 Z 12 2 RO R A Rt D 11 DI B NC 1, 8, 13 3 DIP/SO 6, 7 GND GND RE DE Figure 1. MAX3080E/MAX3083E/MAX3086E Pin Configuration and Typical Full-Duplex Operating Circuit TOP VIEW 0.1µF VCC MAX3081E MAX3084E MAX3087E VCC 1 5 Y 8 A RO 2 7 B DI 3 6 Z VCC 1 GND 4 R D 5 Y DI 3 Rt D R 6 Z RO 8 A RO 2 R Rt D 7 DI B DIP/SO 4 GND GND Figure 2. MAX3081E/MAX3084E/MAX3087E Pin Configuration and Typical Full-Duplex Operating Circuit TOP VIEW 0.1µF RO 1 R 8 VCC RO RE 2 7 B RE DE 3 6 A DE 5 GND DI DI 4 D 1 8 R 7 B 3 6 A 5 D DI B Rt D DE VCC 2 4 MAX3082E MAX3085E MAX3088E Rt A GND RO R RE DIP/SO NOTE: PIN LABELS Y AND Z ON TIMING, TEST, AND WAVEFORM DIAGRAMS. REFER TO PINS A AND B WHEN DE IS HIGH. Figure 3. MAX3082E/MAX3085E/MAX3088E Pin Configuration and Typical Half-Duplex Operating Circuit ______________________________________________________________________________________ 13 MAX3080E–MAX3089E ±15kV ESD-Protected, Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers Detailed Description The MAX3080E–MAX3089E high-speed transceivers for RS-485/RS-422 communication contain one driver and one receiver. These devices feature fail-safe circuitry, which guarantees a logic-high receiver output when the receiver inputs are open or shorted, or when they are connected to a terminated transmission line with all drivers disabled (see the Fail-Safe section). The MAX3080E/MAX3081E/MAX3082E feature reduced slew-rate drivers that minimize EMI and reduce reflections caused by improperly terminated cables, allowing error-free data transmission up to 115kbps (see the Reduced EMI and Reflections section). The MAX3083E/MAX3084E/MAX3085E offer higher driver output slew-rate limits, allowing transmit speeds up to 500kbps. The MAX3086E/MAX3087E/MAX3088E’s driver slew rates are not limited, making transmit speeds up to 10Mbps possible. The MAX3089E’s slew rate is selectable between 115kbps, 500kbps, and 10Mbps by driving a selector pin with a three-state driver. The MAX3082E/MAX3085E/MAX3088E are half-duplex transceivers, while the MAX3080E/MAX3081E/ MAX3083E/MAX3084E/MAX3086E/MAX3087E are fullduplex transceivers. The MAX3089E is selectable between half- and full-duplex communication by driving a selector pin high or low, respectively. All of these parts operate from a single +5V supply. Drivers are output short-circuit current limited. Thermal shutdown circuitry protects drivers against excessive power dissipation. When activated, the thermal shutdown circuitry places the driver outputs into a highimpedance state. Receiver Input Filtering The receivers of the MAX3080E–MAX3085E, and the MAX3089E when operating in 115kbps or 500kbps mode, incorporate input filtering in addition to input hysteresis. This filtering enhances noise immunity with differential signals that have very slow rise and fall times. Receiver propagation delay increases by 20% due to this filtering. Fail-Safe The MAX3080E family guarantees a logic-high receiver output when the receiver inputs are shorted or open, or when they are connected to a terminated transmission line with all drivers disabled. This is done by setting the receiver threshold between -50mV and -200mV. If the differential receiver input voltage (A-B) is greater than or equal to -50mV, RO is logic high. If A-B is less than or equal to -200mV, RO is logic low. In the case of a terminated bus with all transmitters disabled, the receiver’s differential input voltage is pulled to 0V by 14 the termination. With the receiver thresholds of the MAX3080E family, this results in a logic high with a 50mV minimum noise margin. Unlike previous fail-safe devices, the -50mV to -200mV threshold complies with the ±200mV EIA/TIA-485 standard. MAX3089E Programming The MAX3089E has several programmable operating modes. Transmitter rise and fall times are programmable between 2500ns, 750ns, and 25ns, resulting in maximum data rates of 115kbps, 500kbps, and 10Mbps, respectively. To select the desired data rate, drive SRL to one of three possible states by using a three-state driver, by connecting it to VCC or GND, or by leaving it unconnected. For 115kbps operation, set the three-state device in high-impedance mode or leave SRL unconnected. For 500kbps operation, drive SRL high or connect it to VCC. For 10Mbps operation, drive SRL low or connect it to GND. SRL can be changed during operation without interrupting data communications. Occasionally, twisted-pair lines are connected backward from normal orientation. The MAX3089E has two pins that invert the phase of the driver and the receiver to correct for this problem. For normal operation, drive TXP and RXP low, connect them to ground, or leave them unconnected (internal pulldown). To invert the driver phase, drive TXP high or connect it to V CC. To invert the receiver phase, drive RXP high or connect it to V CC . Note that the receiver threshold is positive when RXP is high. The MAX3089E can operate in full- or half-duplex mode. Drive the H/F pin low, leave it unconnected (internal pulldown), or connect it to GND for full-duplex operation, and drive it high for half-duplex operation. In full-duplex mode, the pin configuration of the driver and receiver is the same as that of a MAX3080E (Figure 4). In half-duplex mode, the receiver inputs are switched to the driver outputs, connecting outputs Y and Z to inputs A and B, respectively. In half-duplex mode, the internal full-duplex receiver input resistors are still connected to pins 11 and 12. ±15kV ESD Protection As with all Maxim devices, ESD-protection structures are incorporated on all pins to protect against electrostatic discharges encountered during handling and assembly. The driver outputs and receiver inputs of the MAX3080E–MAX3089E family have extra protection against static electricity. Maxim’s engineers have developed state-of-the-art structures to protect these pins against ESD of ±15kV without damage. ______________________________________________________________________________________ ±15kV ESD-Protected, Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers MAX3080E–MAX3089E VCC RE MAX3089E A RD TOP VIEW B H/F 1 14 V CC RO 2 RE 3 RXP 13 RXP MAX3089E 12 A DE 4 11 B DI 5 10 Z SRL 6 9 Y GND 7 8 TXP H/F Z TXP DIP/SO Y DI NOTE: SWITCH POSITIONS INDICATED FOR H/F = GND GND DE SRL Figure 4. MAX3089E Pin Configuration and Functional Diagram Y TEST POINT RECEIVER OUTPUT CRL 15pF R VOD R 1k VCC S1 1k VOC S2 Z Figure 5. Driver DC Test Load Figure 6. Receiver Enable/Disable Timing Test Load The ESD-protected pins are tested with reference to the ground pin in a powered-down condition. They are tested to ±15kV using the Human Body Model. charged into a low impedance. This model consists of a 100pF capacitor charged to the ESD voltage of interest, which is then discharged into the test device through a 1.5kΩ resistor. ESD Test Conditions ESD performance depends on a variety of conditions. Contact Maxim for a reliability report that documents test setup, test methodology, and test results. Human Body Model Figure 14a shows the Human Body Model, and Figure 14b shows the current waveform it generates when dis- Machine Model The Machine Model for ESD tests all pins using a 200pF storage capacitor and zero discharge resistance. The objective is to emulate the stress caused when I/O pins are contacted by handling equipment during test and assembly. All pins require this protec- ______________________________________________________________________________________ 15 MAX3080E–MAX3089E ±15kV ESD-Protected, Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers 3V DE DI CL1 Y RDIFF VOD2 VCC S1 500Ω OUTPUT UNDER TEST Z CL CL2 S2 Figure 7. Driver Timing Test Circuit Figure 8. Driver Enable and Disable Timing Test Load 5V DI 5V 1.5V 0 DE 1.5V tDPHL tDPLH 1/2 VO 1.5V tDZL(SHDN), tDZL Z tDLZ Y, Z VO 2.3V OUTPUT NORMALLY LOW VOL Y 1/2 VO VO VDIFF 0 -VO 1.5V 0 10% tDR VDIFF = V (Y) - V (Z) OUTPUT NORMALLY HIGH Y, Z 90% 90% VOH -0.5V 2.3V 10% 0 tDZH(SHDN), tDZH tDF tSKEW = | tDPLH - tDPHL | Figure 9. Driver Propagation Delays VOL +0.5V tDHZ Figure 10. Driver Enable and Disable Times (Except MAX3081E/MAX3084E/MAX3087E) 5V RE 1.5V 1.5V 0 RO VOH VOL 1V A -1V B 1.5V OUTPUT tRPHL tRPLH 1.5V tRZL(SHDN), tRZL tRLZ VCC RO 1.5V OUTPUT NORMALLY LOW RO 1.5V INPUT VOL + 0.5V OUTPUT NORMALLY HIGH VOH - 0.5V 0 tRZH(SHDN), tRZH Figure 11. Receiver Propagation Delays 16 tRHZ Figure 12. Receiver Enable and Disable Times (Except MAX3081E/MAX3084E/MAX3087E) ______________________________________________________________________________________ ±15kV ESD-Protected, Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers CHARGE-CURRENT LIMIT RESISTOR MAX3080E–MAX3089E RC 1MΩ RD 1500Ω DISCHARGE RESISTANCE B RR RECEIVER OUTPUT A Ir Cs 100pF STORAGE CAPACITOR DEVICE UNDER TEST Figure 14a. Human Body ESD Test Model Figure 13. Receiver Propagation Delay Test Circuit IP 100% 90% HIGHVOLTAGE DC SOURCE MAX3080/3089 FIG-14 VID ATE PEAK-TO-PEAK RINGING (NOT DRAWN TO SCALE) AMPERES 36.8% 20dB/div 10% 0 0 tRL TIME tDL CURRENT WAVEFORM 0Hz 100kHz/div 1MHz Figure 15. Driver Output Waveform and FFT Plot of MAX3086E/MAX3087E/MAX3088E, and MAX3089E with SRL = GND, Transmitting a 20kHz Signal MAX3080/3089 FIG-16 MAX3080/3089 FIG-15 Figure 14b. Human Body Current Waveform A B 20dB/div 0Hz 100kHz/div Figure 16. Driver Output Waveform and FFT Plot of MAX3083E/MAX3084E/MAX3085E, and MAX3089E with SRL = VCC, Transmitting a 20kHz Signal 1MHz A B 20dB/div 0Hz 100kHz/div 1MHz Figure 17. Driver Output Waveform and FFT Plot of MAX3080E/MAX3081E/MAX3082E, and MAX3089E with SRL = Unconnected, Transmitting a 20kHz Signal ______________________________________________________________________________________ 17 MAX3080E–MAX3089E ±15kV ESD-Protected, Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers MAX3080/3089 FIG-18 MAX3080E/MAX3081E/MAX3083E/ MAX3084E/MAX3086E/MAX3087E/ MAX3089E (FULL DUPLEX) DI 5V/div VA - VB 1V/div RO 5V/div A RO RE R 120Ω B DATA IN DE Z DI D 120Ω Y DATA OUT NOTE: RE AND DE ON MAX3080E/MAX3083E/MAX3086E/MAX3089E ONLY. 5µs/div Figure 18. Line Repeater for MAX3080E/MAX3081E/MAX3083E/ MAX3084E/MAX3086E/MAX3087E, and MAX3089E in Full-Duplex Mode Figure 19. MAX3080E/MAX3081E/MAX3082E, and MAX3089E with SRL = Unconnected, System Differential Voltage at 50kHz Driving 4000ft of Cable during test and assembly. All pins require this protection, not just RS-485 inputs and outputs. Figure 17’s high-frequency harmonic components are even lower. In general, a transmitter’s rise time relates directly to the length of an unterminated stub, which can be driven with only minor waveform reflections. The following equation expresses this relationship conservatively: Length = tRISE / (10 x 1.5ns/ft) where tRISE is the transmitter’s rise time. Applications Information 256 Transceivers on the Bus The standard RS-485 receiver input impedance is 12kΩ (one-unit load), and the standard driver can drive up to 32 unit loads. The MAX3080E family of transceivers have a 1/8-unit-load receiver input impedance (96kΩ), allowing up to 256 transceivers to be connected in parallel on one communication line. Any combination of these devices and/or other RS-485 transceivers with a total of 32 unit loads or less can be connected to the line. Reduced EMI and Reflections The MAX3080E–MAX3085E, and MAX3089E with SRL = VCC or unconnected, are slew-rate limited, minimizing EMI and reducing reflections caused by improperly terminated cables. Figure 15 shows the driver output waveform and its Fourier analysis of a 20kHz signal transmitted by a MAX3086E/MAX3087E/MAX3088E, and MAX3089E with SRL = GND. High-frequency harmonic components with large amplitudes are evident. Figure 16 shows the same signal displayed for a MAX3083E/MAX3084E/MAX3085E, and MAX3089E with SRL = VCC), transmitting under the same conditions. Figure 16’s high-frequency harmonic components are much lower in amplitude, compared with Figure 15’s, and the potential for EMI is significantly reduced. Figure 17 shows the same signal displayed for a MAX3080E/ MAX3081E/MAX3082E, and MAX3089E with SRL = unconnected, transmitting under the same conditions. 18 For example, the MAX3080E’s rise time is typically 1320ns, which results in excellent waveforms with a stub length up to 90 feet. A system can work well with longer unterminated stubs, even with severe reflections, if the waveform settles out before the UART samples them. Low-Power Shutdown Mode (Except MAX3082E/MAX3085E/MAX3088E) Low-power shutdown mode is initiated by bringing both RE high and DE low. In shutdown, the devices typically draw only 1nA of supply current. RE and DE may be driven simultaneously; the parts are guaranteed not to enter shutdown if RE is high and DE is low for less than 50ns. If the inputs are in this state for at least 600ns, the parts are guaranteed to enter shutdown. Enable times t ZH and t ZL in the Switching Characteristics tables assume the part was not in a lowpower shutdown state. Enable times t ZH(SHDN) and tZL(SHDN) assume the parts were shut down. It takes drivers and receivers longer to become enabled from low-power shutdown mode (tZH(SHDN), tZH(SHDN)) than from driver/receiver-disable mode (tZH, tZL). ______________________________________________________________________________________ ±15kV ESD-Protected, Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers DI 5V/div DI 5V/div VA - VB 1V/div VA - VB 1V/div RO 5V/div RO 5V/div 1µs/div 2µs/div Figure 20. MAX3083E/MAX3084E/MAX3085E, and MAX3089E with SRL = VCC, System Differential Voltage at 50kHz Driving 4000ft of Cable Figure 21. MAX3086E/MAX3087E/MAX3088E, and MAX3089E with SRL = GND, System Differential Voltage at 200kHz Driving 4000ft of Cable 120Ω 120Ω DE B B DI D D DI DE RO RE A B A B A A R R RO RE R MAX3082E MAX3085E MAX3088E MAX3089E (HALF-DUPLEX) R D D DI DE RO RE DI DE RO RE Figure 22. Typical Half-Duplex RS-485 Network Driver Output Protection Typical Applications Two mechanisms prevent excessive output current and power dissipation caused by faults or by bus contention. The first, a foldback current limit on the output stage, provides immediate protection against short circuits over the whole common-mode voltage range (see Typical Operating Characteristics). The second, a thermal shutdown circuit, forces the driver outputs into a high-impedance state if the die temperature becomes excessive. The MAX3082E/MAX3085E/MAX3088E/MAX3089E transceivers are designed for bidirectional data communications on multipoint bus transmission lines. Figures 22 and 23 show typical network applications circuits. These parts can also be used as line repeaters, with cable lengths longer than 4000 feet, as shown in Figure 18. To minimize reflections, the line should be terminated at both ends in its characteristic impedance, and stub lengths off the main line should be kept as short as possible. The slew-rate-limited MAX3082E/MAX3085E, and the two modes of the MAX3089E, are more tolerant of imperfect termination. Line Length vs. Data Rate The RS-485/RS-422 standard covers line lengths up to 4000 feet. For line lengths greater than 4000 feet, use the repeater application shown in Figure 18. Figures 19, 20, and 21 show the system differential voltage for the parts driving 4000 feet of 26AWG twistedpair wire at 110kHz into 120Ω loads. ______________________________________________________________________________________ 19 MAX3080E–MAX3089E MAX3080/3089 FIG-20 MAX3080/3089 FIG-19 MAX3080E–MAX3089E ±15kV ESD-Protected, Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers A R RO RE Y 120Ω 120Ω D B Z Z B DE DI DI DE 120Ω D Y 120Ω Z Y B A Y Z B R A RE RO A R D D DI R DE RE RO DI DE RE RO NOTE: RE AND DE ON MAX3080E/MAX3083E/MAX3086E/MAX3089E ONLY. MAX3080E MAX3081E MAX3083E MAX3084E MAX3086E MAX3087E MAX3089E (FULL-DUPLEX) Figure 23. Typical Full-Duplex RS-485 Network Ordering Information (continued) PART MAX3081ECSA MAX3081ECPA MAX3081EESA MAX3081EEPA MAX3082ECSA MAX3082ECPA MAX3082EESA MAX3082EEPA MAX3083ECSD MAX3083ECPD MAX3083EESD MAX3083EEPD MAX3084ECSA MAX3084ECPA MAX3084EESA MAX3084EEPA MAX3085ECSA MAX3085ECPA MAX3085EESA MAX3085EEPA TEMP. RANGE 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C PIN-PACKAGE 8 SO 8 Plastic DIP 8 SO 8 Plastic DIP 8 SO 8 Plastic DIP 8 SO 8 Plastic DIP 14 SO 14 Plastic DIP 14 SO 14 Plastic DIP 8 SO 8 Plastic DIP 8 SO 8 Plastic DIP 8 SO 8 Plastic DIP 8 SO 8 Plastic DIP PART MAX3086ECSD MAX3086ECPD MAX3086EESD MAX3086EEPD MAX3087ECSA MAX3087ECPA MAX3087EESA MAX3087EEPA MAX3088ECSA MAX3088ECPA MAX3088EESA MAX3088EEPA MAX3089ECSD MAX3089ECPD MAX3089EESD MAX3089EEPD TEMP. RANGE 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C PIN-PACKAGE 14 SO 14 Plastic DIP 14 SO 14 Plastic DIP 8 SO 8 Plastic DIP 8 SO 8 Plastic DIP 8 SO 8 Plastic DIP 8 SO 8 Plastic DIP 14 SO 14 Plastic DIP 14 SO 14 Plastic DIP Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 20 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2000 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products. This datasheet has been download from: www.datasheetcatalog.com Datasheets for electronics components.