SP3081E

SP3080E-3088E Advanced-Failsafe RS-485/RS-422 Transceivers 1/8th Unit Load, Slew-Rate Limited, ±15kV ESD-Protected FEATURES • 5.0V single supply operation • Receiver failsafe on open, shorted or terminated lines • 1/8th Unit Load, 256 transceivers on bus • Robust ESD protection for RS-485 pins o ±15kV Air-Gap Discharge o ±15kV Human Body Model o ±8kV Contact Discharge • Controlled driver slew rates o 115kbps, Low EMI (SP3080E, SP3081E, SP3082E) o 500kbps, Low EMI (SP3083E, SP3084E, SP3085E) o High Speed, 20Mbps (SP3086E, SP3087E, SP3088E) •Hot Swap glitch protection on control inputs •Driver short circuit current limit and thermal shutdown for overload protection •Ultra-low 400μA quiescent current •1μA shutdown mode (except SP3081, SP3084, SP3087) •Industry standard package footprints RO 1 RE 2 DE 3 DI 4 8 PIN NSOIC SP3082E SP3085E SP3088E Half Duplex 8 Vcc 7B 6A 5 GND Vcc 1 RO 2 DI 3 GND 4 8 PIN NSOIC SP3081E SP3084E SP3087E Full Duplex 8A 7B 6Z 5Y NC 1 RO 2 RE 3 DE 4 DI 5 GND 6 GND 7 14 PIN NSOIC 14 Vcc 13 NC 12 A 11 B 10 Z 9Y 8 NC APPLICATIONS • Motor Control • Building Automation • Security Systems • Remote Meter Reading • Long or un-terminated transmission lines SP3080E SP3083E SP3086E Full Duplex The SP3080E-SP3088E family of RS-485 devices are designed for reliable, bidirectional communication on multipoint bus transmission lines. Each device contains one differential driver and one differential receiver. The SP3082E, SP3085E and SP3088E are half-duplex devices; other part numbers are full-duplex. All devices comply with TIA/EIA-485 and TIA/EIA-422 standards. Lead-free and RoHS compliant packages are available for all models. These devices are ruggedized for use in harsh operating conditions over the entire common-mode voltage range from -7V to +12V. Receivers are specially designed to fail-safe to a logic high output state if the inputs are left un-driven or shorted. All RS-485 bus-pins are protected against severe ESD events up to ±15kV (Air-Gap and Human Body Model) and up to ±8kV Contact Discharge (IEC 10004-2). Drivers are protected from excess current flow caused by bus contention or output short-circuits by both an internal current limit and a thermal-overload shutdown. Devices are rated for industrial (-40 to +85ºC) operating temperatures. Receivers have exceptionally high input impedance, which places only 1/8th the standard load on a shared bus. Up to 256 transceivers may coexist while preserving full signal margin. All devices operate from a single 5.0V power supply and draw negligible quiescent power. All versions except the SP3081E, SP3084E, and SP3087E may independently enable and disable their driver and receiver and enter a low power shutdown mode if both driver and receiver are disabled. All outputs maintain high impedance in shutdown or when powered-off. Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com SP3080E-SP3088E_100_062309 DESCRIPTION 1 DEVICE ARCHITECTURE AND BLOCK DIAGRAMS Devices are available in three industry standard architectures and footprints. In each footprint there are three speed grades available. NC RO 1 2 R 3 RE DE 4 DI GND GND 5 6 7 D 14 VCC 13 NC 12 A 11 B 10 Z 14-Pin Full Duplex SP3080E, 115kbps slew rate limited SP3083E, 500kbps slew rate limited SP3086E, 20Mbps 9Y 8 NC VCC 1 RO 2 R 8-Pin Full Duplex 8A 7 B 6 D Z SP3081E, 115kbps slew rate limited SP3084E, 500kbps slew rate limited SP3087E, 20Mbps DI GND 3 4 5Y RO 1 2 R 8 VCC 7B 6A 5 GND 8-Pin Half Duplex SP3082E, 115kbps slew rate limited SP3085E, 500kbps slew rate limited SP3088E, 20Mbps RE DE 3 DI 4 D Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com SP3080E-SP3088E_100_062309 2 PIN ASSIGNMENTS Pin Number Full-Duplex SP3080E SP3081E SP3083E SP3084E SP3086E SP3087E 2 2 Half Duplex SP3082E SP3085E SP3088E 1 RO Receiver Output. When RE is low and if (A – B) ≥ -40mV, RO is high. If (A – B) ≤ - 200mV, RO is low. Receiver Output Enable. When RE is low, RO is enabled. When RE is high, RO is high impedance. Drive RE high and DE low to enter shutdown mode. RE is a hot-swap input. Driver Output Enable. When DE is high, outputs are enabled. When DE is low, outputs are high impedance. Drive DE low and RE high to enter shutdown mode. DE is a hot-swap input. Driver Input. With DE high, a low level on DI forces non-inverting output low and inverting output high. A high level on DI forces noninverting output high and inverting output low. Ground Non-inverting Driver Output Inverting Driver Output Inverting Receiver Input Inverting Receiver Input and Inverting Driver Output Non-inverting Receiver Input Non-inverting Receiver Input and Non-inverting Driver Output Positive Supply VCC. Bypass to GND with a 0.1uF capacitor. No Connect, not internally connected Pin Name Pin Function 3 - 2 RE REREE 4 - 3 DE 5 3 4 DI 6, 7 9 10 11 12 14 1, 8, 13 4 5 6 7 8 1 - 5 7 6 8 - GND Y Z B B A A VCC NC Note: On 14-pin packages connect both pins 6 and 7 to Ground. Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com SP3080E-SP3088E_100_062309 3 ABSOLUTE MAxIMUM RATINGS These are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections of the specifications below is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability. Supply Voltage (VCC).......................................................+ 7.0V Input voltage at control input pins (RE, DE)... -0.3V to Vcc+0.3V Driver input voltage (DI) ..............................-0.3V to Vcc+0.3V Driver output voltage (A, B, Y, and Z) ............................+/-13V Receiver output voltage (RO) ..................-0.3V to (Vcc + 0.3V) Receiver input voltage (A, B) .........................................+/-13V Package Power Dissipation: Maximum Junction Temperature 150°C 8-Pin SO Θja = 128.4°C/W 14-Pin SO Θja = 86°C/W Storage Temperature.......................................-65°C to +150°C Lead Temperature (soldering, 10s)............................... +300°C Vcc=5V ±5%, Tmin to Tmax, unless otherwise noted, Typical values are Vcc=5V and Ta=25°C Recommended Operating Conditions Supply Voltage, Vcc Input Voltage on A and B pins High-level input voltage (DI, DE or RE), Vih Low-level input voltage (DI, DE or RE), Vih Output Current Driver Receiver Signaling Rate, 1/tui SP3080, SP3081, SP3082 SP3083, SP3084, SP3085 SP3086, SP3087, SP3088 Operating Free Air Temperature, Ta Industrial Grade (E) -40 Min. 4.5 -7 2 0 -60 -8 Nom. 5 Max. 5.5 12 Vcc 0.8 60 8 0.115 0.5 20 85 RECOMMENDED OPERATING CONDITIONS Unit V V V V mA Mbps °C Note: The least positive (most negative) limit is designated as the maxium value. Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com SP3080E-SP3088E_100_062309 4 ELECTRICAL CHARACTERISTICS PARAMETER Digital Input Signals: DI, DE, RE High, Vih Low, Vil Ta = 25°C, after first transition Ta = 25°C 100 2.0 0.8 ±1 TEST CONDITIONS MIN TYP MAx UNIT Logic input thresholds Logic Input Current Input Hysteresis Driver Differential Driver Output (Vod) Differential Driver Output, Test 1 Differential Driver Output, Test 2 Change in Magnitude of Differential Output Voltage (ΔVod) (Note 1) Driver Common Mode Output Voltage (Vcc) Change in Common Mode Output Voltage (ΔVoc) Driver Short Circuit Current Limit Output Leakage Current (Full-duplex versions, Y & Z pins) Note 2 Receiver Receiver Input Resistance Input Current (A, B pins) V μA mV No Load Rl=100Ω (RS-422) Rl=54Ω (RS-485) Vcm = -7 to +12V Rl=54 or 100Ω Rl=54 or 100Ω Rl=54 or 100Ω -7V ≤ Vout ≤ +12V (Note 5) DE=0, RE=0, Vcc=0 or 5.5V Vout=12V Vout= -7V -100 1 2 1.5 1.5 2.7 Vcc Vcc Vcc Vcc ±0.2 3 ±0.2 ±250 125 V V V V V mA μA -7V ≤ Vcm ≤ 12V DE=0, RE=0, Vcc=0 or 5.5V Vin= 12V Vin= -7V 96 125 -100 -200 -125 25 -40 KΩ μA mV mV V 0.4 ±1 ± 95 μA mA Receiver Differential Threshold (VA-VB) Receiver Input Hysteresis Receiver Output Voltage Voh Vol -7V ≤ Vcm ≤ 12V Iout = -8mA, Vid = -40mV Iout = 8mA, Vid = -200mV Vcc =5.5V, 0 ≤ Vout ≤ Vcc 0V ≤ Vro ≤ Vcc Vcc-1.5 High-Z Receiver Output Current Receiver Output Short Circuit Current Supply and Protection Supply Current IQ, Active Mode Shutdown Mode No load, DI=0 or Vcc DE=0, RE=Vcc, DI=Vcc Junction temperature 400 900 1 μA μA o Thermal Shutdown Temperature Thermal Shutdown Hysteresis 165 15 C Notes: 1. Change in Magnitude of Differential Output Voltage and Change in Magnitude of Common Mode Output Voltage are the changes in output voltage when DI input changes state. 2. Except devices which don’t have DE or RE inputs. 3. The transceivers are put into shutdown by bringing RE high and DE low. If the inputs are in this state for less than 50ns the device does not enter shutdown. If the enable inputs are held in this state for at least 600ns the device is assured to be in shutdown. In this low power mode most circuitry is disabled and supply current is typically 1nA. 4.Characterized, not 100% tested. 5. See Driver Short Circuit Limit Test Circuit. Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com SP3080E-SP3088E_100_062309 5 TIMING CHARACTERISTICS Unless otherwise noted Vcc= +5.0±0.5V, ambient temperature Ta from -40 to +85ºC SP3080E, SP3081E, SP3082E DRIVER CHARACTERISTICS: Data Signaling Rate (1 / tUI) Driver Propagation Delay (tPHL, tPLH) Driver Output Rise/Fall Time (tR, tF) Driver Differential Skew (tPLH – tPHL) Driver Enable to Output High (tDZH) Driver Enable to Output Low (tDZL) Driver Disable from Output High (tDHZ) Driver Disable from Output Low (tDLZ) Shutdown to Driver Output Valid (tDZV) SP3083E, SP3084E, SP3085E DRIVER CHARACTERISTICS: Data Signaling Rate (1/ tUI) Driver Propagation Delay (tPHL, tPLH) Driver Output Rise/Fall Time (tR, tF) Driver Differential Skew (tPLH – tPHL) Driver Enable to Output High (tDZH) Driver Enable to Output Low (tDZL) Driver Disable from Output High (tDHZ) Driver Disable from Output Low (tDLZ) Shutdown to Driver Output Valid (tDZV) SP3086E, SP3087E, SP3088E DRIVER CHARACTERISTICS: Data Signaling Rate (1 / tUI) Driver Propagation Delay (tPHL, tPLH) Driver Output Rise/Fall Time (tR, tF) Driver Differential Skew (tPLH – tPHL) Driver Enable to Output High (tDZH) Driver Enable to Output Low (tDZL) Driver Disable from Output High (tDHZ) Driver Disable from Output Low (tDLZ) Shutdown to Driver Output Valid (tDZZV) Receiver CHARACTERISTICS: Receiver Prop. Delay SP3080E - SP3085E Receiver Prop. Delay SP3086E - SP3088E Prop. Delay Skew SP3080E-SP3085E Prop. Delay Skew SP3086E-SP3088E Receiver Output Rise/Fall Time Receiver Enable to Output High (tZH) Receiver Enable to Output Low (tZL) Receiver Disable from High (tHZ) Receiver Disable from Low (tLZ) Shutdown to Receiver Output Valid (tROV) Time to Shutdown (Note 2,3,4) 50 200 CL = 15pf Conditions CL = 15pF, VID = ±2V, SP3086E, SP3087E Conditions Duty Cycle 40 to 60% RL = 54Ω, CL = 50pF, SP3083E, SP3084E Duty Cycle 40 to 60% RL = 54Ω, CL = 50pF, 500 250 200 530 1000 750 ±100 2500 2500 100 100 4500 Kbps ns ns ns ns ns ns ns ns Conditions SP3080E, SP3081E Duty Cycle 40 to 60% RL = 54Ω, CL = 50pF, 115 500 2600 ±200 3500 3500 100 100 6000 667 1200 2500 Kbps ns ns ns ns ns ns ns ns Conditions Min. Typ. Max. Unit Min. Typ. Max. Unit Min. Typ. Max. Unit 20 12 6 20 10 ±5 150 150 50 50 250 Mbps ns ns ns ns ns ns ns ns Min. Typ. Max. Unit 75 200 75 ±30 ±5 15 50 50 50 50 3500 600 ns ns ns ns ns ns ns ns ns ns ns Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com SP3080E-SP3088E_100_062309 6 TYPICAL PERFORMANCE CHARACTERISTICS 350 700 No-Load Supply Current (uA) 325 300 275 250 225 2 00 -60 -40 -20 0 20 40 60 80 100 Temperature (ºC) Shutdown Current (nA) DE = Vcc 650 600 DE = GND 550 500 -60 -40 -20 0 20 40 60 80 100 Tem perature (ºC) No-Load Supply Current vs Temperature Shutdown Current vs Temperature 1000 1000 N o Load VCC=5V TA=25ºC 50% Square wave input No Load VCC=5V 100 TA=25ºC 50% Square wave input D river and Receiver 10 100 Supply Current (mA) 10 Driver and Receiver Supply Current (mA) 1 Receiver 0.1 1 10 100 1000 Signaling Rate (kbps ) 1 Receiver 0.1 1 10 100 1000 Signaling Rate (kbps ) Supply Current vs Signaling Rate (SP3080-SP3082) Supply Current vs Signaling Rate (SP3083 - SP3085) 100 No Load VCC=5V TA=25ºC 50% Square wave input 100 90 80 Supply Current (mA) D river and Receiver Output Current (mA) 10000 100000 10 70 60 50 40 30 20 10 1 Receiver 0.1 1 10 100 1000 Signaling Rate (kbps ) 0 0 1 2 3 4 5 6 Output Low Voltage (V) Supply Current vs Signaling Rate (SP3086-SP3088) Output Current vs Driver Output Low Voltage Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com SP3080E-SP3088E_100_062309 7 TYPICAL PERFORMANCE CHARACTERISTICS -120 -100 100 Output Current (mA) -60 -40 -20 0 -2 0 2 Output High Voltage (V) 4 6 Output Current (mA) -80 10 1 0.1 0.01 0 1 2 3 4 5 6 Dif f erential Output Voltage (V) Output Current vs Driver Output High Voltage 3.4 3.2 0.35 Driver Output Current vs Differential Output Voltage IOUT=8m A, VID=-200m V Output Low Voltage (V) Output Voltage (V) 3 2.8 2.6 2.4 2.2 2 -60 -40 -20 0 20 R L =100 0.3 0.25 0.2 R L=54 0.15 40 60 80 100 0.1 -60 -40 -20 0 20 40 60 80 100 Tem perature (ºC) Temperature (º C) Driver Differential Output Voltage vs Temperature Receiver Output Low Voltage vs Temperature 4 5 IOUT=8m A, VID=-40m V Receiver Output Voltage (V) 3.9 4 VCC=5V TA=25ºC Output High Voltage (V) 3.8 3 3.7 2 3.6 1 3.5 -60 0 -40 -20 0 20 40 60 80 100 -200 -180 -160 -140 -120 -100 -80 -60 -40 -20 0 Temperature (º C) Differential Input Voltage (m V) Receiver Output High Voltage vs Temperature Receiver Output Voltage vs Differential Input Voltage Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com SP3080E-SP3088E_100_062309 8 TYPICAL PERFORMANCE CHARACTERISTICS 60 50 40 30 20 10 0 0 1 2 3 4 5 Output Low Voltage (V) 960 950 R L=54 ,C L=50pF Propagation Delay (ns) 940 930 920 910 900 890 880 870 -60 -40 -20 0 20 40 60 80 100 Output Current (mA) Temperature (º C) Output Current vs Receiver Output Low Voltage Driver Average Propagation Delay vs Temperature (SP3080-SP3082) 960 950 435 R L=54 ,CL=50pF 430 R L=54 ,C L=50pF Propagation Delay (ns) 940 930 920 910 900 890 880 870 -60 -40 -20 0 20 40 60 80 100 Temperature (ºC) tPHL tPLH Propagation Delay (ns) 425 420 415 410 -60 -40 -20 0 20 40 60 80 100 Temperature (º C) Driver Propagation Delay vs Temperature (SP3080-SP3082) Driver Average Propagation Delay vs Temperature (SP3083-SP3085) 35 30 460 R L=54 ,C L=50pF 450 20 15 10 5 0 0 1 2 3 4 5 Output High Voltage (V) Propagation Delay (ns) Output Current (mA) 25 440 430 420 410 tPLH tPHL 400 390 -60 -40 -20 0 20 40 60 80 100 Temperature (º C) Output Current vs Receiver Output High Voltage Driver Propagation Delay vs Temperature (SP3083-SP3085) Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com SP3080E-SP3088E_100_062309 9 TYPICAL PERFORMANCE CHARACTERISTICS 15 R L=54 14 ,C L=50pF 120 C L=15pF, VID=±2V 110 Propagation Delay (ns) 12 11 10 9 8 -60 -40 -20 0 20 40 60 80 100 Tem perature (ºC) tPHL Propagation Delay (ns) 13 tPLH 100 90 80 70 -60 -40 -20 0 20 40 60 80 100 Temperature (º C) Driver Propagation Delay vs Temperature (SP3086-SP3088) Receiver Average Propagation Delay vs Temperature (SP3080-SP3082) 120 C L=15pF, VID=±2V 110 155 150 145 140 135 130 125 120 C L=15pF, VID=±2V tPHL Propagation Delay (ns) 100 90 tPHL tPLH 80 70 -60 -40 -20 0 20 40 60 80 100 Temperature (ºC) Propagation Delay (ns) tPLH 115 -60 -40 -20 0 20 40 60 80 100 Temperature (º C) Receiver Propagation Delay vs Temperature (SP3080-SP3082) Receiver Propagation Delay vs Temperature (SP3083-SP3085) 13.5 55 R L=54 13 ,C L=50pF 53 51 C L=15pF, VID=±2V Propagation Delay (ns) Propagation Delay (ns) Propagation Delay (ns) 12.5 12 11.5 11 10.5 10 -60 49 47 45 43 41 39 37 tPHL tPLH -40 -20 0 20 40 60 80 100 35 -60 -40 -20 0 20 40 60 80 100 Temperature (º C) Temperature (º C) Driver Average Propagation Delay vs Temperature (SP3086-SP3088) Receiver Propagation Delay vs Temperature (SP3086-SP3088) Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com SP3080E-SP3088E_100_062309 10 TYPICAL PERFORMANCE CHARACTERISTICS Driver Propagation Delay (SP3080-SP3082) Driver and Receiver Hot Swap Performance vs. Vcc 54 52 C L =15pF, V ID =±2V Propagation Delay (ns) 50 48 46 44 Propagation Delay (ns) 42 40 -60 -40 -20 0 20 Temperature (ºC) 40 60 80 100 Receiver Average Propagation Delay vs Temperature (SP3086-SP3088) Driver output Waveform Low to High (SP3080-SP3082) Driver output Waveform High to Low (SP3080-SP3082) Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com SP3080E-SP3088E_100_062309 11 TYPICAL PERFORMANCE CHARACTERISTICS Driver and Receiver Waveform High to Low (SP3080-SP3082) Driver Propagation Delay (SP3083-SP3085) Driver Output Waveform Low to High (SP3083-SP3085) Driver Output Waveform High to Low (SP3083-SP3085) Driver and Receiver Waveform Low to High (SP3080-SP3082) Driver and Receiver Waveform Low to High (SP3083-SP3085) SP3080E-SP3088E_100_062309 Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com 12 TYPICAL PERFORMANCE CHARACTERISTICS Driver Propagation Delay (SP3086-SP3088) Driver Output Waveform Low to High (SP3086-SP3088) Driver Output Waveforms High to Low (SP3086-SP3088) Driver and Receiver Waveform Low to High (SP3086-SP3088) Driver and Receiver Waveform High to Low (SP3083-SP3085) Driver and Receiver Waveform High to Low (SP3086-SP3088) SP3080E-SP3088E_100_062309 Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com 13 TYPICAL PERFORMANCE CHARACTERISTICS Receiver Propagation Delay (SP3086-SP3088) Receiver Propagation Delay (SP3080-SP3082) Receiver Propagation Delay (SP3083-SP3085) TEST CIRCUITS A R/2 DI VCC D VOD R/2 VOC VID B R RE OUT Driver DC Test Circuit Receiver DC Test Circuit Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com SP3080E-SP3088E_100_062309 14 TEST CIRCUITS DI Y D Z 3.3V VOD RL 54Ω CL 50pF Driver Propagation Delay Time Test Circuit and Timing Diagram DI Vcc 0V Z Y VO 1/2VO Vcc/2 t PLH t PHL Vcc/2 1/2VO t DPLH 90% 10% tR t SKEW = |t DPLH - t DPHL| t DPHL 90% 10% tF VDIFF VY – VZ VO+ 0V VO– Driver Short Circuit Current Limit Test Circuit DE = 0 or Vcc DI = 0 or Vcc D B/Z 100Ω -7V to +12V V A/Y IOSD Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com SP3080E-SP3088E_100_062309 15 TEST CIRCUITS Driver Differential Output Test Circuit DE = 3.3V DI = 0 or Vcc A/Y D VOD B/Z 60Ω 375Ω 375Ω VCM Driver Enable and Disable Times Test Circuit and Timing Diagram Y 0 or Vcc DI D Z CL = 50pF S1 OUT RL = 500Ω GENERATOR 50Ω DE t ZL, t ZL(SHDN) Vcc Vcc/2 0 OUT VOM = (V + Vcc)/2 OL t LZ 0.25V 0 Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com SP3080E-SP3088E_100_062309 16 TEST CIRCUITS Driver Enable and Disable Times Test Circuit and Timing Diagram Vcc RL = 500Ω Y 0 or Vcc DI D Z CL = 50pF S1 OUT GENERATOR 50Ω DE Vcc/2 tZL, tZL(SHDN) t LZ Vcc 0 Vcc OUT VOL VOM = (VOL + Vcc)/2 0.25V Receiver Propagation Delay Test Circuit and Timing Diagram A VID B R RE OUT CL 15pF A B 1.5V t PHL t PLH +1V -1V VOH VOL OUT Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com SP3080E-SP3088E_100_062309 17 TEST CIRCUITS Receiver Enable and Disable Times Test Circuit 1.5V -1.5V S3 S1 B A R RE GENERATOR 1kΩ S2 CL= 15pF Vcc 50Ω Receiver Enable and DisableTiming Diagram S1 is open, S2 is closed, S3 = 1.5V 3V 1.5V RE t ZH, t ZH(SHDN) VOH OUT VOH /2 S1 is closed, S2 is open, S3 = -1.5V 3V RE 1.5V t ZL,t ZL(SHDN) 0V VCC OUT VOL= VCC /2 VOL 0V S1 is open, S2 is closed, S3 = 1.5V 3V RE 0.25V OUT 1.5V tHZ VOH 0V S1 is closed, S2 is open, S3 = -1.5V 3V RE 1.5V t LZ 0V VCC OUT 0.25V VOL Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com SP3080E-SP3088E_100_062309 18 FUNCTION TABLES SP3080E, SP3083E, SP3086E (Full Duplex) Transmitting Inputs RE X X 0 1 DE 1 1 0 0 DI 1 0 X X Y 1 0 High-Z Shutdown Outputs Z 0 1 RE 0 0 0 1 1 DE X X X 1 0 Receiving Inputs ≥ -40mV ≤-200mV Open/shorted X X VA - VB Output RO 1 0 1 High-Z Shutdown SP3081E SP3084E, SP3087E (Full Duplex) Transmitting Input DI 1 0 Open Y 1 0 1 Outputs Z 0 1 0 Inputs VA - VB ≥ -40mV ≤-200mV Open/shorted Receiving Output RO 1 0 1 SP3082E SP3085E, SP3088E (Half Duplex) Transmitting RE X X 0 1 Inputs DE 1 1 0 0 Outputs DI 1 0 X X A 1 0 High-Z Shutdown B 0 1 RE 0 0 0 1 1 DE X X X 1 0 Receiving Inputs VA - VB ≥ -40mV ≤-200mV Open/shorted X X Output RO 1 0 1 High-Z Shutdown Note: Receiver inputs -200mV < VA - VB < -40mV, should be considered indeterminate PRODUCT SELECTOR GUIDE Part Number SP3080E SP3081E SP3082E SP3083E SP3084E SP3085E SP3086E SP3087E SP3088E Duplex Full Full Half Full Full Half Full Full Half Data Rate (Mbps) 0.115 0.115 0.115 0.5 0.5 0.5 20 20 20 Shut-down Yes No Yes Yes No Yes Yes No Yes Receiver & Trans on Bus Foot-print Driver Enable Yes No Yes Yes No Yes Yes No Yes 256 256 256 256 256 256 256 256 256 SN75180 SN75179 SN75176 SN75180 SN75179 SN75176 SN75180 SN75179 SN75176 pin-compatible upgrade from: MAX3080 MAX3081 SP483, MAX3082 MAX3083 MAX3084 MAX3085 SP1491, MAX3086 SP1490, MAX3087 SP1481, MAX3088 Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com SP3080E-SP3088E_100_062309 19 DETAILED DESCRIPTION SP3080E-SP3088E is a family of advanced RS-485/RS-422 transceivers. Each contains one driver and one receiver. These devices feature fail-safe circuitry that 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. SP3080E, SP3082E, SP3083E, SP3085E, SP3086E and SP3088E also feature a hot-swap capability allowing live insertion without error data transfer. The SP3080E, SP3081E and SP3082E 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 SP3083E, SP3084E and SP3085E also offer slew-rate limits allowing transmit speeds up to 500kbps. The SP3086E, SP3087E, SP3088E driver slew rates are not limited, making transmit speeds up to 20Mbps possible. The SP3082E, SP3085E and SP3088E are half-duplex transceivers, while the SP3080E, SP3081E, SP3083E, SP3084E, SP3086E, and SP3087E are full duplex transceivers. All devices operate from a single 5.0V 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 high-impedance state. RECEIVER INPUT FILTERING SP3080E-SP3085E receivers 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 due to this filtering. ADVANCED FAIL SAFE Ordinary RS485 differential receivers will be in an indeterminate state whenever A - B is less than ±200mV. This situation can occur whenever the data bus is not being actively driven. The Advanced Failsafe feature of the SP3080E family guarantees a logic-high receiver output if the receiver’s differential inputs are shorted, open-circuit, or if they are shunted by a termination resistor. DESCRIPTION The receiver thresholds of the SP3080E family, are very precise and offset by at least a 40mV noise margin from ground. This results in a logic-high receiver output at zero volts input differential while maintaining compliance with the EIA/TIA-485 standard of ±200mV. HOT-SWAP CAPABILITY When a micro-processor or other logic device undergoes its power-up sequence its logicoutputs are typically at high impedance. In this state they are unable to drive the DE and signals to a defined logic level. During this period, noise, parasitic coupling or leakage from other devices could cause standard CMOS enable inputs to drift to an incorrect logic level. If circuit boards are inserted into an energized backplane (commonly called “live insertion” or “hot-swap”) power may be suddenly applied to all circuits. Without the hot-swap capability, this situation could improperly enable the transceiver’s driver or receiver, driving invalid data onto shared busses and possibly causing driver contention or device damage. The SP3080E family contains a special poweron-reset circuit that holds DE low and RE high for approximately 10 microseconds. After this initial power-up sequence the hot-swap circuit becomes transparent, allowing for normal, unskewed enable and disable timings. ±15KV ESD PROTECTION ESD-protection structures are incorporated on all pins to protect against electrostatic discharges encountered during handling and assembly. The driver output and receiver inputs of the SP3080E family have extra protection against static electricity. Exar uses state of the art structures to protect these pins against ESD of ±15kV without damage. The ESD structures withstand high ESD in all states: normal operation, shutdown, and powered down. After an ESD event, the SP3080E - SP3088E keeps working without latch-up or damage. ESD protection can be tested in various ways. The transmitter outputs and receiver inputs of Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com SP3080E-SP3088E_100_062309 20 the SP3080E - SP3088E are characterized for protection to the following limits: ±15kV using the Human Body Model ±8kV using the Contact Discharge method specified in IEC 1000-4-2 ±15kV Air-gap ESD TEST CONDITIONS ESD performance depends on a variety of conditions. Contact Exar for a reliability report that documents test setup, methodology and results. IEC 1000-4-2 The IEC 1000-4-2 standard covers ESD testing and performance of finished equipment. However, it does not specifically refer to integrated circuits. The SP3080E family helps you design equipment to meet IEC 1000-4-2, without sacrificing board space and cost for external ESDprotection components. The major difference between tests done using the Human Body Model and IEC 1000-4-2 is a higher peak current in IEC 1000-4-2 series resistance is lower in the IEC 1000-4-2 model. Hence, the ESD withstand voltage measured to IEC 1000-4-2 is generally lower than that measured using the human body model. The air-gap test involves approaching the device with a charged probe. The contact discharge method connects the probe to the device before the probe is energized. 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. 256 TRANSCEIVERS ON THE BUS The standard RS-485 receiver input impedance is 12kΩ (1 unit load). A standard driver can drive up to 32 unit loads. The SP3080E family of transceivers has only a 1/8th unit load receiver input impedance (96kΩ), thereby allowing eight times as many, up to 256, transceivers to be connected in parallel on a communication line. Any combination of these devices and other RS-485 transceivers up to a total of 32 unit loads may be connected to the line. LOW POWER SHUTDOWN MODE Low-power shutdown mode is initiated by bringing both RE high and DE low simultaneously. While in shutdown devices typically draw only 50nA of supply current. DE and RE may be tied together and driven by a single control signal. Devices 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 shutdown. Enable times tZH and tZL apply when the part is not in low-power shutdown state. Enable times tZH(SHDN) and tZL(SHDN) apply when the parts are shut down. The drivers and receivers take longer to become enabled from low power shutdown mode tZL(SHDN) and tZL(SHDN) than from driver/receiver-disable mode (tZH, tZL). DRIVER OUTPUT PROTECTION Two mechanisms prevent excessive output current and power dissipation caused by faults or by bus contention. First, a driver-current limit on the output stage provides immediate protection against short circuits over the whole common-mode voltage range. Second, a thermalshutdown circuit forces the driver outputs into a high-impedance state if junction temperature becomes excessive. LINE LENGTH, EMI, AND REFLECTIONS SP3080E - SP3085E feature controlled slewrate drivers that minimize EMI and reduce reflections caused by improperly terminated cables. SP3080E - SP3083E driver rise and fall times are limited to no faster than 667ns, allowing error-free data transmission up to 115kbps. The SP3083, SP3084 and SP3085 offer somewhat higher driver output slew-rate limits, allowing transmit speeds up to 500kbps. The RS-485/RS-422 standard covers line lengths up to 4,000ft. Maximum achievable line length is a function of signal attenuation and noise. Use of slew-controlled drivers such as the SP3080E-SP3086E may help to reduce crosstalk interference and permit communication over longer transmission lines. DESCRIPTION Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com SP3080E-SP3088E_100_062309 21 DESCRIPTION Termination prevents reflections by eliminating the impedance mismatches on a transmission line. Line termination is typically used if rise and fall times are shorter than the round-trip signal propagation time. Slew-limited drivers may reduce or eliminate the need for cable termination in many applications. TYPICAL APPLICATIONS: Half-Duplex Network H alf -D uplex N etw ork Bi-Directional Full-Duplex Network B i-Directional Full-Duplex Network Point to Multi-Point Repeater Po int to Multi -point with Repeater Repeater R epeater (optional) (optional) Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com SP3080E-SP3088E_100_062309 22 Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com SP3080E-SP3088E_100_062309 23 Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com SP3080E-SP3088E_100_062309 24 ORDERING INFORMATION Part number LEAD FREE Tape & Reel SP3080EEN SP3081EEN SP3082EEN SP3083EEN SP3084EEN SP3085EEN SP3086EEN SP3087EEN SP3088EEN -L -L -L -L -L -L -L -L -L /TR /TR /TR /TR /TR /TR /TR /TR /TR Temperature range From -40 to +850C From -40 to +85 C 0 Package Type 14 pin nSOIC 8 pin nSOIC 8 pin nSOIC 14 pin nSOIC 8 pin nSOIC 8 pin nSOIC 14 pin nSOIC 8 pin nSOIC 8 pin nSOIC From -40 to +850C From -40 to +85 C 0 0 0 0 From -40 to +85 C From -40 to +85 C From -40 to +85 C From -40 to +850C From -40 to +85 C 0 All packages are available as lead free (RoHS compliant). To order add “-L” suffix to part number. For Tape and Reel add “/TR”. Reel quantity is 2,500 for NSOIC. Example: SP3082EEN-L/TR = lead free and Tape and Reel. SP3082EEN/TR = standard with Tape and Reel. REVISION HISTORY DATE 2/22/07 06/23/09 REVISION M 1.0.0 DESCRIPTION Legacy Sipex Datasheet Convert to Exar Format and Change revision to 1.0.0. Notice EXAR Corporation reserves the right to make changes to any products contained in this publication in order to improve design, performance or reliability. EXAR Corporation assumes no representation that the circuits are free of patent infringement. Charts and schedules contained herein are only for illustration purposes and may vary depending upon a user's specific application. While the information in this publication has been carefully checked; no responsibility, however, is assumed for inaccuracies. EXAR Corporation does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reasonably be expected to cause failure of the life support system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications unless EXAR Corporation receives, in writting, assurances to its satisfaction that: (a) the risk of injury or damage has been minimized ; (b) the user assumes all such risks; (c) potential liability of EXAR Corporation is adequately protected under the circumstances. Copyright 2009 EXAR Corporation Datasheet June 2009 Send your Interface technical inquiry with technical details to: uarttechsupport@exar.com Reproduction, in part or whole, without the prior written consent of EXAR Corporation is prohibited. Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com SP3080E-SP3088E_100_062309 25