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| SP3070E - SP3078E Family 15kV ESD-Protected, 3.3V, 1/8 load, Failsafe RS-485/RS422 Transceivers FEaTuRES 15kV ESD protection for RS485 pins 3.3V low-power operation Advanced Receiver-failsafe protection for open, shorted or terminated lines Up to 256 Transceivers may share Bus Very low load for 8x greater fanout Hot Swap glitch protection RE and DE Thermal shutdown protects against driver contention Available in three industry standard footprints SP3070E, 3073 and 3076 in Full-Duplex (14 pin) SP3071E, 3074 and 3077 in Full-Duplex (8 pin) SP3072E, 3075 and 3078 in Half-Duplex (8 pin) RO RE DE DI 1 2 3 4 8 PIN NSOIC SP3072E SP3075E SP3078E Half Duplex 8 PIN NSOIC SP3071E SP3074E SP3077E Full Duplex 8 7 6 5 Vcc B A GND Vcc RO DI GND 1 2 3 4 8 7 6 5 A B Z Y NC RO RE DE DI GND GND 1 2 3 4 5 6 7 14 Vcc Three applications-optimized speed grades SP3070E-72E: 250kbps slew-limited SP3073E-75E: 500kbps slew-limited SP3076E-78E: 16Mbps high speed 14 PIN NSOIC SP3070E SP3073E SP3076E Full Duplex 13 NC 12 11 10 9 8 A B Z Y NC Small form factor SO-narrow packages Industrial (-40 to +85C) and Extended (-40 to +125C) temperature grades Now Available in Lead Free Packaging aPPlICaTIONS Industrial Control, Utility Meters Building Automation, Instrumentation, Point of Sale DESCRIPTION The SP3070E-3078E differential line transceivers are suitable for bidirectional communication on balanced multipoint bus transmission lines and comply with both RS485 and RS422 EIA Standards. Each device consists of a differential driver and differential receiver. All devices operate from a 3.3V power supply. High receiver input impedance allows a large number of transceivers to share a common data bus while maintaining signal margin and without excessive loading or use of expensive repeaters. The high impedance driver output is maintained over the entire common-mode voltage range from -7 to +12V. Receivers will failsafe to logic 1 output when inputs are open, shorted or terminated. Drivers include built-in short-circuit protection and a thermal-overload shutdown to protect against excessive power dissipation from bus contention or cable faults. All RS485 receiver inputs and driver outputs are ESD protected up to 15kV (Air-Gap and Human Body Model) and up to 8kV Contact discharge (IEC 1000-4-2). Exar Corporation 48720 Kato Road, Fremont CA, 94538 * 510-668-7017 * www.exar.com SP3070E-SP3078E_100_061109 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 R 1 2 R 14 VCC 13 NC 12 A 11 B 10 14 Pin Full Duplex: SP3070E, 250kbps slew limited SP3073E, 500kbps slew limited SP3076E, 16Mbps 3 REB 4 DE D5 6 GND 7 GND D Z 9Y 8 NC VCC 1 2 R R 8A 7B 6Z 8 Pin Full Duplex: SP3071E, 250kbps slew limited SP3074E, 500kbps slew limited SP3077E, 16Mbps GND 3 D 4 D 5Y 2 RE DE 3 4 DI RO 1 R 8 VCC 7B 6A 8 Pin Half Duplex: SP3072E, 250kbps slew limited SP3075E, 500kbps slew limited SP3078E, 16Mbps D 5 GND Exar Corporation 48720 Kato Road, Fremont CA, 94538 * 510-668-7017 * www.exar.com SP3070E-SP3078E_100_061109 2 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. VCC.................................................................................................+6.0V Input Voltage at control input pins (RE, DE).........................-0.3V to 6V Driver Input Voltage (RE, DE)...............................................-0.3V to 6V Driver Output Voltage (A, B, Y, & Z)....................................-8V to +13V Receiver Input Voltage (A, B)..............................................-8V to +13V Continuous Power Dissipation at TA = 70oC 8-pin SO (derate 5.88mW/oC above +70oC)................................471mW 14-pin SO (derate 8.33mW/oC above +70oC).............. .............667mW Operating Temperature Ranges SP307XE_MN..............................................................-40C to +125C SP307XE_EN ................................................................-40C to +85C Junction Temperature.................................................................+150C Storage Temperature Range.......................................-65C to +150 C Lead Temperature (soldering, 10s) ..........................................+300 C aBSOluTE MaXIMuM RaTINGS Unless otherwise noted VCC = +3.3 0.3V, ambient temperature TMIN < TA < TMAX. Typical values are at VCC = 3.3, ambient temperature TA = +25C. The denotes the specifications which apply over the full operating range unless otherwise noted. PARAMETER SYM. MIN. 2 Differential Driver Output VOD 1.5 TYP. MAX. VCC VCC VCC Change in Magnitude of Differential Output Voltage Driver Common Mode Output Voltage Change in Magnitude of Common Mode Output Voltage Input High Voltage Input Low Voltage Input Hysteresis Input Current Input Impedance First Transition (Hotswap) Output Leakage (Y and Z) Full Duplex (A and B) Driver Short-Circuit Current IO V OD VOC V OC VIH VIL VHYS IIN -1 1 100 1 10 +125 -100 0 -250 250 0 2 0.8 VCC /2 0.2 3 0.2 V V V V V mV A k V UNITS CONDITIONS RL = 100 (RS-422), Figure 1 RL = 54 (RS-485), Figure 1 No Load RL = 54 or 100, Figure 1 RL = 54 or 100, Figure 1 RL = 54 or 100, Figure 1 DE, DI, RE DE, DI, RE DE, DI, RE DE, DI, RE DE, RE First transition will draw more current (Hotswap) DE = GND VCC = GND or 3.6V VIN = +12 V VIN = -7V ElECTRICal CHaRaCTERISTICS A IOSD mA -7V V OUT 12V, (Figure 4A) Exar Corporation 48720 Kato Road, Fremont CA, 94538 * 510-668-7017 * www.exar.com SP3070E-SP3078E_100_061109 3 Unless otherwise noted VCC = +3.3 0.3V, ambient temperature TMIN < TA < TMAX. Typical values are at VCC = 3.3, ambient temperature TA = +25C. The denotes the specifications which apply over the full operating range unless otherwise noted. ElECTRICal CHaRaCTERISTICS PARAMETERS Input Current (A and B) Half Duplex Thermal-Shutdown Threshold Thermal Shutdown Hysteresis RECEIVER Receiver Differential Threshold (Sensitivity) Receiver Input Hysteresis RO Output High Voltage RO Output Low Voltage Tri-State Output Current at Receiver Receiver Input Resistance Receiver Output Short-Circuit Current SUPPLY CURRENT SYM MIN TYP MAX 125 UNITS CONDITIONS DE = GND VCC = GND or 3.6 VIN = +12V VIN = -7V IA,B TTS TTSH -100 165 15 A C C VTH V TH VOH VOL IOZR RIN IOZR -200 -125 15 -50 mV mV V - 7 V VCM 1 2 V Va + Vb = 0V IO = -1mA IO = 1mA 0 V O V CC -7V V CM 1 2 V 0 V V RO V CC Vcc 0.6 0.4 +/-1 96 60 V A k mA 0.8 Supply Current ICC 0.8 0.8 Supply Current in Shutdown mode ESD PROTECTION 15 ESD Protection for Y, Z, A, and B 15 8 ISHDN 0.05 1.5 1.5 1.5 3 A mA No Load, RE = 0, DE = VCC No Load, RE = VCC , DE = VCC No Load, RE = 0, DE = 0 RE = VCC , DE = GND Human Body Model kV Air Gap (IEC 1000-4-2) Contact (IEC 1000-4-2) Exar Corporation 48720 Kato Road, Fremont CA, 94538 * 510-668-7017 * www.exar.com SP3070E-SP3078E_100_061109 4 DRIVER SWITCHING CHaRaCTERISTICS Unless otherwise noted VCC = +3.3 0.3V, ambient temperature TMIN < TA < TMAX. Typical values are at VCC = 3.3, ambient temperature TA = +25C. SP3070E, SP3071E & SP3072E Driver Switching Characteristics DRIVER CHARACTERISTICS: Data Signaling Rate Driver Propagation Delay (tPHL, tPLH) Driver Output Rise/Fall Time (tR, tF) Driver Differential Skew (tPLH - tPHL) Driver Enable to Output High (tZH) Driver Enable to Output Low (tZL) Driver Disable from Output High (tHZ) Driver Disable from Output Low (tLZ) Driver Enable from Shutdown to Output High (tZH(SHDN)) Driver Enable from Shutdown to Output Low (tZL(SHDN)) Time to Shutdown (tSHDN) Figure 4 Figure 5 50 RL = 500, CL = 50pF, Figure 4 & 5 Conditions Duty Cycle 40 to 60% RL = 54, CL = 50pF, Figure 2 & 3 Min. Typ. Max. Unit 250 250 350 1500 1600 200 2500 2500 100 100 5500 5500 200 600 Kbps ns ns ns ns ns ns ns ns ns ns RECEIVER SWITCHING CHaRaCTERISTICS Unless otherwise noted VCC = +3.3 0.3V, ambient temperature TMIN < TA < TMAX. Typical values are at VCC = 3.3, ambient temperature TA = +25C. SP3070E, SP3071E & SP3072E Receiver Switching Characteristics RECEIVER CHARACTERISTICS: Data Signaling Rate Receiver Propagation Delay (tPLH, tPHL) Propagation Delay Skew (tPLH, tPHL) Receiver Enable to Output High (tZH) Receiver Enable to Output Low (tZL) Receiver Disable from Output High (tHZ) Receiver Disable from Output Low (tLZ) Figure 8 Figure 8 Figure 8 Figure 8 Conditions Duty Cycle 40 to 60% Cl=15pF, Figure 6 & 7 Min. Typ. Max. Unit 250 200 30 50 50 100 200 4000 4000 50 200 600 Kbps ns ns ns ns ns ns ns ns ns Receiver Enable from Shutdown to Output Figure 8 High Receiver Enable from Shutdown to Output Figure 8 Low Time to Shutdown (tSHDN) Exar Corporation 48720 Kato Road, Fremont CA, 94538 * 510-668-7017 * www.exar.com SP3070E-SP3078E_100_061109 5 Unless otherwise noted VCC = +3.3 0.3V, ambient temperature TMIN < TA < TMAX. Typical values are at VCC = 3.3, ambient temperature TA = +25C. DRIVER SWITCHING CHaRaCTERISTICS SP3073E, SP3074E & SP3075E Driver Switching Characteristics DRIVER CHARACTERISTICS: Data Signaling Rate Driver Propagation Delay (tPHL, tPLH) Driver Output Rise/Fall Time (tR, tF) Driver Differential Skew (tPLH - tPHL) Driver Enable to Output High (tZH) Driver Enable to Output Low (tZL) Driver Disable from Output High (tHZ) Driver Disable from Output Low (tLZ) Driver Enable from Shutdown to Output High (tZH(SHDN)) Driver Enable from Shutdown to Output Low (tZL(SHDN)) Time to Shutdown (tSHDN) Figure 4 Figure 5 50 RL = 500, CL = 50pF, Figure 4 & 5 Conditions Duty Cycle 40 to 60% RL = 54, CL = 50pF, Figure 2 & 3 Min. Typ. Max. Unit 500 180 200 800 800 100 2500 2500 100 100 4500 4500 200 600 Kbps ns ns ns ns ns ns ns ns ns ns Unless otherwise noted VCC = +3.3 0.3V, ambient temperature TMIN < TA < TMAX. Typical values are at VCC = 3.3, ambient temperature TA = +25C. RECEIVER SWITCHING CHaRaCTERISTICS SP3073E, SP3074E & SP3075E Receiver Switching Characteristics RECEIVER CHARACTERISTICS: Data Signaling Rate Receiver Propagation Delay (tPLH, tPHL) Propagation Delay Skew (tPLH, tPHL) Receiver Enable to Output High (tZH) Receiver Enable to Output Low (tZL) Receiver Disable from Output High (tHZ) Receiver Disable from Output Low (tLZ) Conditions Duty Cycle 40 to 60% Cl=15pF, Figure 6 & 7 Figure 8 Figure 8 Figure 8 Figure 8 Min. Typ. Max. Unit 500 200 30 50 50 50 50 4000 4000 50 200 600 Kbps ns ns ns ns ns ns ns ns ns Receiver Enable from Shutdown to Output Figure 8 High Receiver Enable from Shutdown to Output Figure 8 Low Time to Shutdown (tSHDN) Exar Corporation 48720 Kato Road, Fremont CA, 94538 * 510-668-7017 * www.exar.com SP3070E-SP3078E_100_061109 6 Unless otherwise noted Vcc=+3.30.3V, ambient temperature Tmin < Ta < Tmax. Typical values are at Vcc = 3.3, ambient temperature Ta = +25C DRIVER SWITCHING CHaRaCTERISTICS SP3076E, SP3077E & SP3078E Receiver Driver Characteristics DRIVER CHARACTERISTICS: Data Signaling Rate Driver Propagation Delay (tPHL, tPLH) Driver Output Rise/Fall Time (tR, tF) Driver Differential Skew (tPLH - tPHL) Driver Enable to Output High (tZH) Driver Enable to Output Low (tZL) Driver Disable from Output High (tHZ) Driver Disable from Output Low (tLZ) Driver Enable from Shutdown to Output High (tZH(SHDN)) Driver Enable from Shutdown to Output Low (tZL(SHDN)) Time to Shutdown (tSHDN) Figure 4 Figure 5 50 RL = 500, CL = 50pF, Figure 4 & 5 Conditions Duty Cycle 40 to 60% RL = 54, CL = 50pF, Figure 2 & 4 Min. Typ. Max. Unit 16 50 15 8 150 150 100 100 1800 1800 200 600 Mbps ns ns ns ns ns ns ns ns ns ns Unless otherwise noted Vcc=+3.30.3V, ambient temperature Tmin < Ta < Tmax. Typical values are at Vcc = 3.3, ambient temperature Ta = +25C RECEIVER SWITCHING CHaRaCTERISTICS SP3076E, SP3077E & SP3078E Receiver Switching Characteristics RECEIVER CHARACTERISTICS: Data Signaling Rate Receiver Propagation Delay (tPLH, tPHL) Propagation Delay Skew (tPLH, tPHL) Receiver Enable to Output High (tZH) Receiver Enable to Output Low (tZL) Receiver Disable from Output High (tHZ) Receiver Disable from Output Low (tLZ) Conditions Duty Cycle 40 to 60% Cl=15pF, Figure 6 & 7, -40 to +85 C Figure 8 Figure 8 Figure 8 Figure 8 Min. Typ. Max. Unit 16 40 75 8 60 60 50 50 1800 1800 50 200 600 Mbps ns ns ns ns ns ns ns ns ns Receiver Enable from Shutdown to Output Figure 8 High Receiver Enable from Shutdown to Output Figure 8 Low Time to Shutdown (tSHDN) Exar Corporation 48720 Kato Road, Fremont CA, 94538 * 510-668-7017 * www.exar.com SP3070E-SP3078E_100_061109 7 FIGuRE 1. DRIVER DC TEST CIRCuIT FIGuRE 2. RECEIVER DC TEST CIRCuIT A R/2 DI 0 or 3V VCC D VOD R/2 VOC VID B R RE OUT FIGuRE 3. DRIVER PROPaGaTION DElay TIME TEST CIRCuIT aND TIMING DIaGRaM RL 54 CL 50pF DI Y D 3.3V Z VOD VCC DI 0 Y Z VCC/2 tPLH tPHL VO 1/2 VO 10% tR VDIFF = V(Y) - V(Z) 90% 90% 1/2 VO 10% tF VDIFF VO -VO VSKEW = tPLH - tPHL Exar Corporation 48720 Kato Road, Fremont CA, 94538 * 510-668-7017 * www.exar.com SP3070E-SP3078E_100_061109 8 FIGuRE 4. DRIVER ENaBlE & DISaBlE TIMES TEST CIRCuIT & TIMING DIaGRaM Y 0 or VCC DI D Z S1 OUT CL = 50pF RL = 500 GENERATOR 50 DE tZL, tZL(SHDN V OM = (VOL + VCC)/2 VCC /2 VCC 0 0.25V 0 OUT tLZ FIGuRE 4a. DRIVER CONTENTION TEST DE = 0 or 3V DI = 0 or 3V D B/Z 100 -7V to +12V V A/Y IOSD Exar Corporation 48720 Kato Road, Fremont CA, 94538 * 510-668-7017 * www.exar.com SP3070E-SP3078E_100_061109 9 FIGuRE 5. DRIVER ENaBlE & DISaBlE TIMES TEST CIRCuIT & TIMING DIaGRaM VCC Y 0 or VCC DI D Z CL = 50pF S1 RL = 500 OUT GENERATOR 50 DE VCC OUT V OL tZL, tZL(SHDN V OM = (VOL + VCC)/2 VCC /2 tLZ VCC 0 0.25V FIGuRE 6. RECEIVER PROPaGaTION DElay TEST CIRCuIT & TIMING DIaGRaM A VID B R RE OUT CL 15pF A B 1.5V t PHL tPLH +1V -1V VOH VOL OUT Exar Corporation 48720 Kato Road, Fremont CA, 94538 * 510-668-7017 * www.exar.com SP3070E-SP3078E_100_061109 10 FIGuRE 7. RECEIVER ENaBlE & DISaBlE TIMES TEST CIRCuIT 1.5V -1.5V S3 S1 B A R RE 1k S2 VCC CL = 15pF GENERATOR 50 FIGuRE 8. RECEIVER ENaBlE & DISaBlE TIMING DIaGRaM S1 is open S2 is closed S3 = 1.5V 3V 1.5V RE S1 is closed, S2 is open, S3 = -1.5V 3V tZH, tZH(SHDN) VOH VOH/2 RE 1.5V tZL, tZL(SHDN) VOL = VCC/2 VOL 0V VCC OUT 0V OUT S1 is open S2 is closed S3 = 1.5V RE 0.25V OUT 1.5V tHZ 3V S1 is closed, S2 is open, S3 = -1.5V RE VOH 0V 1.5V tLZ 3V 0V VCC OUT 0.25V VOL Exar Corporation 48720 Kato Road, Fremont CA, 94538 * 510-668-7017 * www.exar.com SP3070E-SP3078E_100_061109 11 FuNCTION TaBlES SP3070E, SP3073E, SP3076E (Full Duplex) TRANSMITTING Inputs RE X X 0 1 DE 1 1 0 0 DI 1 0 X X Z 0 1 High-Z Shutdown Outputs Y 1 0 RE 0 0 X 1 1 SP3070E, SP3073E, SP3076E (Full Duplex) RECEIVING Inputs DE X X X 1 0 A, B -50mV -200mV Open, Shorted X X Output RO 1 0 1 High-Z Shutdown SP3071E, SP3074E, SP3077E (Full Duplex) TRANSMITTING Inputs DI 1 0 Z 0 1 Outputs Y 1 0 SP3071E, SP3074E, SP3077E (Full Duplex) RECEIVING Inputs A, B -50mV -200mV Open/shorted Output RO 1 0 1 SP3072E, SP3075E, SP3078E (Half Duplex) TRANSMITTING Inputs RE X X 0 1 DE 1 1 0 0 DI 1 0 X X Outputs B/Z 0 1 High-Z Shutdown A/Y 1 0 SP3072E, SP3075E, SP3078E (Half Duplex) RECEIVING Inputs RE 0 0 X 1 1 DE X X X 1 0 A, B -50mV -200mV Open/shorted X X Output RO 1 0 1 High-Z Shutdown Exar Corporation 48720 Kato Road, Fremont CA, 94538 * 510-668-7017 * www.exar.com SP3070E-SP3078E_100_061109 12 PIN DESCRIPTION FULL DUPLEX DEVICES SP3070E SP3073E SP3076E SP3071E SP3074E SP3077E PIN NUMBER 2 2 1 RO Receiver Output. When RE is low and if (A - B) -50mV, 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. RE should be high and DE low to enter shutdown mode. RE is a hotswap input. Driver Output Enable. When DE is high, outputs are enabled. When DE is low, outputs are high impedance. DE should be 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 noninverting output low and inverting output high. Similarly, a high level on DI forces noninverting output high and inverting output low. Ground Noninverting Driver Output Inverting Driver Output Inverting Receiver Input Inverting Receiver Input and Inverting Driver Output Noninverting Receiver Input Noninverting Receiver Input and Noninverting Driver Output Positive Supply VCC . Bypass VCC to GND with a 0.1uF capacitor. No Connect HALF DUPLEX DEVICES SP3072E SP3075E SP3078E PIN NAME PIN FUNCTION 3 - 2 RE 4 - 3 DE 5 6, 7 9 10 11 12 14 1, 8, 13 3 4 5 6 7 8 1 - 4 5 7 6 8 - DI GND Y Z B B A A VCC NC Exar Corporation 48720 Kato Road, Fremont CA, 94538 * 510-668-7017 * www.exar.com SP3070E-SP3078E_100_061109 13 DETaIlED DESCRIPTION The SP307XE family of 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. The SP3070E, SP3072E, SP3073E, SP3075E, SP3076E and SP3078E also feature a hotswap capability allowing live insertion without error data transfer. The SP3070E, SP3071E and SP3072E feature reduced slew-rate drivers that minimize EMI and reduce reflections caused by improperly terminated cables, allowing error-free data transmission up to 250kbps. The SP3073E, SP3074E and SP3075E also offer slew -rate limits allowing transmit speeds up to 500kbps. The SP3076E, SP3077E, SP3078E driver slew rates are not limited, making transmit speeds up to 16Mbps possible. The SP3072E, SP3075E and SP3078E are half-duplex transceivers, while the SP3070E, SP3071E, SP3073E, SP3074E, SP3076E, and SP3077E are full duplex transceivers. All devices operate from a single 3.3V 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 SP3070E-SP3075E 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 by 25% due to this filtering. FaIl SaFE The SP3070E family guarantees a logic-high receiver output when the receiver inputs are shorted, open, or when they are connected to a terminated transmission line with all drivers disabled. If A - B is less than or equal DETaIlED DESCRIPTION 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 ZeroV by the termination. With the receiver thresholds of the SP3070E family, this results in a logic high with a 50mV minimum noise margin. In compliance with the EIA/TIA-485 standard, the SP3070E family has a 50mV - 200mV threshold. HOT-SWaP CaPaBIlITy When circuit boards are inserted into a hot backplane, differential disturbances to the data bus can lead to data errors. Upon initial circuit board insertion, the data communication processor undergoes its own power-up sequence. During this period, the processor's logic-output drivers are high impedance and are unable to drive the DE and RE inputs of these devices to a defined logic level. Leakage currents up to 10A from the highimpedance state of the processor's logic drivers could cause standard CMOS enable inputs of a transceiver to drift to an incorrect logic level. Additionally, parasitic circuit board capacitance could cause coupling of VCC or GND to the enable inputs. Without the hot-swap capability, these factors could improperly enable the transceiver's driver or receiver. When VCC rises, an internal pulldown circuit holds DE low and RE high for approximately 10 microseconds. After the initial power-up sequence, the pulldown circuit becomes transparent, resetting the hot-swap tolerable input. 15KV ESD PROTECTION As with all Exar devices, 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 SP3070E family of devices have extra protection against static electricity. Exar's engineering team have developed state of the art structures to protect these pins against ESD of 15kV without damage. The SP3070E-SP3078E_100_061109 Exar Corporation 48720 Kato Road, Fremont CA, 94538 * 510-668-7017 * www.exar.com 14 DETAILED DESCRIPTION ESD structures withstand high ESD in all states: normal operation, shutdown, and powered down. After an ESD event, the SP3070E - SP3078E keep working without latchup or damage. ESD protection can be tested in various ways. The transmitter outputs and receiver inputs of the SP3070E - SP3078E 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 Airgap 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 SP3070E family of devices helps you design equipment to meet IEC 1000-4-2, without the need for additional ESD-protection components. The major difference between tests done using the Human Body Model and IEC 1000-4-2 is higher peak current in IEC 1000-4-2, because series resistance is lower in the IEC 1000-4-2 model. Hence, the ESD withstand voltage measured to EC 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 contactdischarge 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. 15 256 TRaNSCEIVERS ON THE BuS The standard RS-485 receiver input impedance is 12k (1 unit load), and the standard driver can drive up to 32 unit loads. The SP3070E family of transceivers has a 1/8unit load receiver input impedance (96k), allowing up to 256 transceivers to be connected in parallel on one communication line. Any combination of these devices as well as other RS-485 transceivers with a total of 32 unit loads or fewer can be connected to the line. REDuCED EMI aND REFlECTIONS The SP3070E, SP3071E and SP3072E feature reduced slew-rate drivers that minimize EMI and reduce reflections caused by improperly terminated cables, allowing errorfree data transmission up to 250kbps. The SP3073E, SP3074E and SP3075E offer higher driver output slew-rate limits, allowing transmit speeds up to 500kbps. lOW POWER SHuTDOWN MODE Low-power shutdown mode is initiated by bringing both RE high and DE low. In shutdown, the devices typically draw only 50nA of supply current. RE and DE can 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 tZH and tZL assume the part was not in a low-power shutdown state. Enable times tZH(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) 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, current limit on the ouput stage, provides immediate protection against short circuits over the whole common-mode voltage range. SP3070E-SP3078E_100_061109 Exar Corporation 48720 Kato Road, Fremont CA, 94538 * 510-668-7017 * www.exar.com DETaIlED DESCRIPTION Second, a thermal-shutdown circuit, forces the driver outputs into a high-impedance state if the die temperature becomes excessive. lINE lENGTH The RS-485/RS422 standard covers line lengths up to 4000ft. TyPICal aPPlICaTIONS The SP3072E, SP3075E and SP3078E transceivers are designed for bidirectional data communications on multipoint bus transmission lines. PaRTS SElECTOR GuIDE PART NUMBER SP3070E SP3071E SP3072E SP3073E SP3074E SP3075E SP3076E SP3077E SP3078E Half/Full Duplex Full Full Half Full Full Half Full Full Half Datarate Mbps 0.25 0.25 0.25 0.5 0.5 0.5 16 16 16 Shutdown Yes No Yes Yes No Yes Yes No Yes Receiver Driver Enable Yes No Yes Yes No Yes Yes No Yes Trans. On Bus 256 256 256 256 256 256 256 256 256 Pin Count 14 8 8 14 8 8 14 8 8 Industry Standard Pinout MAX3070E, 75180 MAX 3071E, 75179 MAX 3072E, 75176 MAX 3073E, 75180 MAX 3074E, 75179 MAX 3075E, 75176 MAX 3076E, 75180 MAX3077E, 75179 MAX 3078E, 75176 SP3494 SP3491 SP3490 SP3485, SP3481 SP3493 SP3483 Pin Compatible Upgrade from: To minimize reflections, terminate the line at both ends in its characteristic impedance, and keep stub lengths off the main line as short as possible. The slew-rate-limited SP3070E - SP3075E are more tolerant of imperfect termination. Exar Corporation 48720 Kato Road, Fremont CA, 94538 * 510-668-7017 * www.exar.com SP3070E-SP3078E_100_061109 16 PaCKaGE: 8 PIN NSOIC Exar Corporation 48720 Kato Road, Fremont CA, 94538 * 510-668-7017 * www.exar.com SP3070E-SP3078E_100_061109 17 PaCKaGE: 14 PIN NSOIC Exar Corporation 48720 Kato Road, Fremont CA, 94538 * 510-668-7017 * www.exar.com SP3070E-SP3078E_100_061109 18 ORDERING INFORMaTION Model Temperature Range Package SP3070EEN-L ..................................................-40C to +85C...................................................... 14-pin NSOIC SP3070EEN-L/TR ............................................-40C to +85C...................................................... 14-pin NSOIC SP3070EMN-L ................................................-40C to +125C..................................................... 14-pin NSOIC SP3070EMN-L/TR...........................................-40C to +125C..................................................... 14-pin NSOIC SP3071EEN-L ..................................................-40C to +85C........................................................ 8-pin NSOIC SP3071EEN-L/TR ............................................-40C to +85C........................................................ 8-pin NSOIC SP3071EMN-L ................................................-40C to +125C....................................................... 8-pin NSOIC SP3071EMN-L/TR...........................................-40C to +125C....................................................... 8-pin NSOIC SP3072EEN-L ..................................................-40C to +85C........................................................ 8-pin NSOIC SP3072EEN-L/TR ............................................-40C to +85C........................................................ 8-pin NSOIC SP3072EMN-L ................................................-40C to +125C....................................................... 8-pin NSOIC SP3072EMN-L/TR...........................................-40C to +125C....................................................... 8-pin NSOIC SP3073EEN-L ..................................................-40C to +85C...................................................... 14-pin NSOIC SP3073EEN-L/TR ............................................-40C to +85C...................................................... 14-pin NSOIC SP3073EMN-L ................................................-40C to +125C..................................................... 14-pin NSOIC SP3073EMN-L/TR...........................................-40C to +125C..................................................... 14-pin NSOIC SP3074EEN-L ..................................................-40C to +85C........................................................ 8-pin NSOIC SP3074EEN-L/TR ............................................-40C to +85C........................................................ 8-pin NSOIC SP3074EMN-L ................................................-40C to +125C....................................................... 8-pin NSOIC SP3074EMN-L/TR...........................................-40C to +125C....................................................... 8-pin NSOIC SP3075EEN-L ..................................................-40C to +85C........................................................ 8-pin NSOIC SP3075EEN-L/TR ............................................-40C to +85C........................................................ 8-pin NSOIC SP3075EMN-L ................................................-40C to +125C....................................................... 8-pin NSOIC SP3075EMN-L/TR...........................................-40C to +125C....................................................... 8-pin NSOIC SP3076EEN-L ..................................................-40C to +85C...................................................... 14-pin NSOIC SP3076EEN-L/TR ............................................-40C to +85C...................................................... 14-pin NSOIC SP3076EMN-L ................................................-40C to +125C..................................................... 14-pin NSOIC SP3076EMN-L/TR...........................................-40C to +125C..................................................... 14-pin NSOIC SP3077EEN-L ..................................................-40C to +85C........................................................ 8-pin NSOIC SP3077EEN-L/TR ............................................-40C to +85C........................................................ 8-pin NSOIC SP3077EMN-L ................................................-40C to +125C....................................................... 8-pin NSOIC SP3077EMN-L/TR...........................................-40C to +125C....................................................... 8-pin NSOIC SP3078EEN-L ..................................................-40C to +85C........................................................ 8-pin NSOIC SP3078EEN-L/TR ............................................-40C to +85C........................................................ 8-pin NSOIC SP3078EMN-L ................................................-40C to +125C....................................................... 8-pin NSOIC SP3078EMN-L/TR...........................................-40C to +125C....................................................... 8-pin NSOIC For availability of PDIP or other packaging contact factory. Available in lead free packaging. To order add "-L" suffix to part number. Example: SP3074EEN/TR = standard; SP3074EEN-L/TR = lead free /TR = Tape and Reel Pack quantity is 2,500 for NSOIC. Exar Corporation 48720 Kato Road, Fremont CA, 94538 * 510-668-7017 * www.exar.com SP3070E-SP3078E_100_061109 19 OTHER INFORMaTION DATE 06/10/09 REVISION DESCRIPTION Legacy Sipex Datasheet 1.0.0 Convert to Exar format, update ordering information, correct subscript on pages 5-7 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 SP3070E-SP3078E_100_061109 20 |
Price & Availability of SP3078EEN-L
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