SP3072EMN-L

SP3070E - SP3078E Family Data Sheet ±15kV ESD-Protected, 3.3V, 1/8 Load, Failsafe RS-485/RS-422 Transceivers General Description Features The SP3070E - SP3078E differential line transceivers are suitable for bidirectional communication on balanced multi-point bus transmission lines and comply with both RS-485 and RS-422 EIA Standards. Each device consists of a differential driver and differential receiver. All devices operate from a 3.3V power supply. ■ ■ ■ ±15kV ESD protection for RS-485 pins ■ ■ ■ ■ ■ Up to 256 transceivers may share Bus 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 RS-485 receiver inputs and driver outputs are ESD protected up to ±15kV (Air-Gap and Human Body Model) and up to ±8kV Contact Discharge (IEC 61000-42). The SP3070E - SP3078E devices may not achieve optimal transmit performance if the connected receiver includes a biasing network to 5.0V without a termination resistor. Please see MaxLinear Application Note ANI#21 for further details. Applications ■ ■ ■ 3.3V low-power operation Advanced receiver-failsafe protection for open, shorted or terminated lines 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, SP3073E and SP3076E in Full-Duplex (14-pin)  SP3071E, SP3074E and SP3077E in Full-Duplex (8-pin)  SP3072E, SP3075E and SP3078E in Half-Duplex (8-pin) Three applications-optimized speed grades  SP3070E - SP3072E: 250kbps slew-limited  SP3073E - SP3075E: 500kbps slew-limited  SP3076E - SP3078E: 16Mbps high speed Small form factor NSOIC packages Industrial (-40 to 85°C) and Extended (-40 to 125°C) temperature grades Ordering Information - page 19 Industrial Control, Utility Meters, Building Automation, Instrumentation, Point of Sale RO 1 RE 2 DE 3 DI 4 8 PIN NSOIC SP3072E SP3075E SP3078E Half Duplex 8 Vcc Vcc 1 7 B RO 2 6 A DI 3 5 GND GND 4 8 PIN NSOIC SP3071E SP3074E SP3077E Full Duplex Figure 1: Pinouts • www.maxlinear.com• Rev 1.0.3 8 A 7 B 6 Z 5 Y NC 1 RO 2 RE 3 DE 4 DI 5 GND 6 GND 7 14 Vcc 14 PIN NSOIC SP3070E SP3073E SP3076E Full Duplex 13 NC 12 A 11 B 10 Z 9 Y 8 NC SP3070E - SP3078E Family RS-485/RS-422 Transceivers Data Sheet Revision History Revision History Document No. Release Date Change Description - Legacy Sipex Datasheet. 1.0.0 06/10/09 Convert to Exar format, update ordering information, correct subscript on pages 5-7 and change revision to 1.0.0. 1.0.1 09/30/10 Correct type error on page 7 on driver switching characteristics table. Change SP3076E,3077E and 3078E Receiver enable time from shutdown from 1800ns to 3000ns. 1.0.2 12/02/10 Add reference to Application Note ANI#21 and change ESD protection levels to IEC 61000-4-2. 1.0.3 2/24/20 Update to MaxLinear format, update Ordering Information. Move ESD Protection to page 2. Corrected 14-pin block diagram (pin 3). 2/24/20 Rev 1.0.3 ii SP3070E - SP3078E Family ±15kV ESD-Protected, 3.3V, 1/8 Load, Failsafe Data Sheet Table of Contents Table of Contents General Description............................................................................................................................................. i Features............................................................................................................................................................... i Applications ......................................................................................................................................................... i Device Architecture and Block Diagrams ........................................................................................................ 1 14-pin Full Duplex ........................................................................................................................................................ 1 8-pin Full Duplex .......................................................................................................................................................... 1 8-pin Half Duplex .......................................................................................................................................................... 1 Specifications ..................................................................................................................................................... 2 Absolute Maximum Ratings...........................................................................................................................................2 ESD Ratings ..................................................................................................................................................................2 Electrical Characteristics ...............................................................................................................................................3 Driver Switching Characteristics - SP3070E, SP3071E & SP3072E.............................................................................5 Receiver Switching Characteristics - SP3070E, SP3071E & SP3072E ........................................................................5 Driver Switching Characteristics - SP3073E, SP3074E & SP3075E.............................................................................6 Receiver Switching Characteristics - SP3073E, SP3074E & SP3075E ........................................................................6 Driver Switching Characteristics - SP3076E, SP3077E & SP3078E.............................................................................7 Receiver Switching Characteristics - SP3076E, SP3077E & SP3078E ........................................................................7 Test Circuits and Timing Diagrams................................................................................................................... 8 Function Tables ................................................................................................................................................ 12 Pin Information ................................................................................................................................................. 13 Pin Configurations .......................................................................................................................................................13 Pin Descriptions ..........................................................................................................................................................13 Detailed Description ......................................................................................................................................... 14 Receiver Input Filtering .............................................................................................................................................. 14 Fail Safe ..................................................................................................................................................................... 14 Hot-Swap Capability .................................................................................................................................................... 14 15kV ESD Protection...................................................................................................................................................14 ESD Test Conditions .................................................................................................................................................. 15 IEC 61000-4-2 ............................................................................................................................................................ 15 Machine Model ........................................................................................................................................................... 15 256 Transceivers on the Bus...................................................................................................................................... 15 Reduced EMI and Reflections .................................................................................................................................... 15 Low Power Shutdown Mode....................................................................................................................................... 15 Driver Output Protection ............................................................................................................................................. 15 2/24/20 Rev 1.0.3 iii SP3070E - SP3078E Family ±15kV ESD-Protected, 3.3V, 1/8 Load, Failsafe Data Sheet Table of Contents Line Length................................................................................................................................................................. 15 Typical Applications.................................................................................................................................................... 15 Parts Selector Guide ........................................................................................................................................ 16 Mechanical Dimensions ................................................................................................................................... 17 NSOIC8 ....................................................................................................................................................................... 17 NSOIC14 ..................................................................................................................................................................... 18 Ordering Information........................................................................................................................................ 19 2/24/20 Rev 1.0.3 iv SP3070E - SP3078E Family ±15kV ESD-Protected, 3.3V, 1/8 Load, Failsafe Data Sheet List of Figures List of Figures Figure 1: Pinouts.................................................................................................................................................... i Figure 2: 14-pin Full Duplex.................................................................................................................................. 1 Figure 3: 8-pin Full Duplex.................................................................................................................................... 1 Figure 4: 8-pin Half Duplex ................................................................................................................................... 1 Figure 5: Driver DC Test Circuit............................................................................................................................ 8 Figure 6: Receiver DC Test Circuit ....................................................................................................................... 8 Figure 7: Driver Propagation Delay Time Test Circuit and Timing Diagram......................................................... 8 Figure 8: Driver Enable and Disable Times Test Circuit and Timing Diagram ..................................................... 9 Figure 9: Driver Contention Test........................................................................................................................... 9 Figure 10: Driver Enable and Disable Times Test Circuit and Timing Diagram ................................................. 10 Figure 11: Receiver Propagation Delay Test Circuit and Timing Diagram ......................................................... 10 Figure 12: Receiver Enable and Disable Times Test Circuit .............................................................................. 11 Figure 13: Receiver Enable and Disable Timing Diagram.................................................................................. 11 Figure 14: Pin Configurations ............................................................................................................................. 13 Figure 15: Mechanical Dimension, NSOIC8 ....................................................................................................... 17 Figure 16: Mechanical Dimensions, NSOIC14 ................................................................................................... 18 2/24/20 Rev 1.0.3 v SP3070E - SP3078E Family ±15kV ESD-Protected, 3.3V, 1/8 Load, Failsafe Data Sheet List of Tables List of Tables Table 1: Absolute Maximum Ratings .................................................................................................................... 2 Table 2: ESD Ratings ........................................................................................................................................... 2 Table 3: Electrical Characteristics ........................................................................................................................ 3 Table 4: SP3070E, SP3071E & SP3072E Driver Switching Characteristics ........................................................ 5 Table 5: SP3070E, SP3071E & SP3072E Receiver Switching Characteristics ................................................... 5 Table 6: SP3073E, SP3074E & SP3075E Driver Switching Characteristics ........................................................ 6 Table 7: SP3073E, SP3074E & SP3075E Receiver Switching Characteristics ................................................... 6 Table 8: SP3076E, SP3077E & SP3078E Driver Switching Characteristics ........................................................ 7 Table 9: SP3076E, SP3077E & SP3078E Receiver Switching Characteristics ................................................... 7 Table 10: SP3070E, SP3073E, SP3076E (Full Duplex)..................................................................................... 12 Table 11: SP3070E, SP3073E, SP3076E (Full Duplex)..................................................................................... 12 Table 12: SP3071E, SP3074E, SP3077E (Full Duplex)..................................................................................... 12 Table 13: SP3071E, SP3074E, SP3077E (Full Duplex)..................................................................................... 12 Table 14: SP3072E, SP3075E, SP3078E (Half Duplex) .................................................................................... 12 Table 15: SP3072E, SP3075E, SP3078E (Half Duplex) .................................................................................... 12 Table 16: Pin Descriptions.................................................................................................................................. 13 Table 17: Parts Selector Guide........................................................................................................................... 16 Table 18: Ordering Information........................................................................................................................... 19 2/24/20 Rev 1.0.3 vi SP3070E - SP3078E Family RS-485/RS-422 Transceivers Data Sheet Device Architecture and Block Diagrams 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 2 R 14 13 12 11 1 R RE 3 4 DE 10 D 5 6 GND 7 GND D 9 8 Vcc NC A B Z Y NC 14-pin Full Duplex: SP3070E, 250kbps slew limited SP3073E, 500kbps slew limited SP3076E, 16Mbps Figure 2: 14-pin Full Duplex Vcc R D GND 1 2 8 A 7 B R 6 3 D 4 Z 5 Y 8-pin Full Duplex: SP3071E, 250kbps slew limited SP3074E, 500kbps slew limited SP3077E, 16Mbps Figure 3: 8-pin Full Duplex RO 1 2 RE DE 3 DI 4 R D 8 VCC 7 B 6 A 5 GND 8-pin Half Duplex: SP3072E, 250kbps slew limited SP3075E, 500kbps slew limited SP3078E, 16Mbps Figure 4: 8-pin Half Duplex 2/24/20 Rev 1.0.3 1 SP3070E - SP3078E Family RS-485/RS-422 Transceivers Data Sheet Specifications Specifications Absolute Maximum Ratings Important: 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. Table 1: Absolute Maximum Ratings Parameter Minimum VCC Maximum Units 6.0 V Input voltage at control input pins (RE, DE) -0.3 6.0 V Driver input voltage (RE, DE) -0.3 6.0 V Driver output voltage (A, B, Y & Z) -8 13 V Receiver input voltage (A, B) -8 13 V 8-pin NSOIC (derate 5.88mW/°C above 70°C) 471 mW 14-pin NSOIC (derate 8.33mW/°C above 70°C) 667 mW Continuous Power Dissipation at TA = 70°C Operating Temperature Ranges SP307xE_MN -40 125 °C SP307xE_EN -40 85 °C 150 °C 150 °C 300 °C Limit Units Junction temperature Storage temperature range -65 Lead temperature (soldering, 10s) ESD Ratings Table 2: ESD Ratings Parameter HBM - Human Body Model (pins Y, Z, A & B) ±15 kV IEC 1000-4-2 Airgap Discharge (pins Y, Z, A & B) ±15 kV IEC 1000-4-2 Contact Discharge (pins Y, Z, A & B) ±8 kV 2/24/20 Rev 1.0.3 2 SP3070E - SP3078E Family RS-485/RS-422 Transceivers Data Sheet Electrical Characteristics Electrical Characteristics Unless otherwise noted, VCC = 3.3V ±0.3V, ambient temperature TMIN < TA < TMAX. Typical values are at VCC = 3.3V, ambient temperature TA = 25°C. The "•" denotes the specifications which apply over the full operating range unless otherwise noted. Table 3: Electrical Characteristics Parameter Differential driver output Symbol VOD Test Condition Minimum Typical Maximum RL = 100 (RS-422), Figure 5 2 VCC RL = 54 (RS-485), Figure 5 1.5 VCC Units V No load • VCC 0.2 V 3 V ±0.2 V Change in magnitude of differential output voltage VOD RL = 54 or 100, Figure 5 • Driver common mode output voltage VOC RL = 54 or 100, Figure 5 • Change in magnitude of common mode output voltage | VOC | RL = 54 or 100, Figure 5 Input high voltage VIH DE, DI, RE Input low voltage VIL DE, DI, RE Input hysteresis VHYS DE, DI, RE • Input current IIN DE, DI, RE • -1 1 µA DE, RE First transition will draw more current (hot swap) • 1 10 kΩ Input impedance first transition (hot swap) • VCC/2 2 V 0.8 VIN = 12V • VIN = -7V • 100 V mV 125 Output leakage (Y and Z) Full duplex (A and B) IO DE = GND VCC = GND or 3.6V Driver short-circuit current IOSD -7V ≤ VOUT ≤ 12V, (Figure 9) Input current (A and B) half duplex IA,B DE = GND VCC = GND or 3.6V Thermal-shutdown threshold TTS • 165 °C Thermal-shutdown hysteresis TTSH • 15 °C VIN = 12V • VIN = -7V • -100 0 ±250 -250 0 125 -100 µA mA µA Receiver Receiver differential threshold (sensitivity) VTH -7V ≤ VCM ≤ 12V Receiver input hysteresis VTH Va + Vb = 0V • RO output high voltage VOH IO = -1mA • RO output low voltage VOL IO = 1mA • 0.4 V Tri-State output current at receiver IOZR 0 ≤ VO ≤ VCC • ±1 µA Receiver input resistance RIN -7V ≤ VCM ≤ 12V • Receiver output short-circuit current IOZR 0V ≤ VRO ≤ VCC 2/24/20 Rev 1.0.3 -200 -125 -50 15 mV mV VCC - 0.6 V 96 kΩ ±60 mA 3 SP3070E - SP3078E Family RS-485/RS-422 Transceivers Data Sheet Electrical Characteristics Table 3: Electrical Characteristics Parameter Symbol Test Condition Minimum Typical Maximum Units Supply Current Supply current Supply current in shutdown mode 2/24/20 ICC ISHDN No load, RE = 0, DE = VCC • 0.8 1.5 No load, RE = VCC, DE = VCC • 0.8 1.5 No load, RE = 0, DE = 0 • 0.8 1.5 0.05 3 RE = VCC, DE = GND Rev 1.0.3 mA µA 4 SP3070E - SP3078E Family RS-485/RS-422 Transceivers Data Sheet Switching Characteristics Driver Switching Characteristics - SP3070E, SP3071E & SP3072E Unless otherwise noted, VCC = 3.3 ±0.3V, ambient temperature TMIN < TA < TMAX. Typical values are at VCC = 3.3V, ambient temperature TA = 25°C. Table 4: SP3070E, SP3071E & SP3072E Driver Switching Characteristics Driver Characteristic Conditions Data signaling rate Duty cycle 40 to 60% Driver propagation delay (tPHL, tPLH) Driver output rise / fall time (tR, tF) Driver differential skew (tPLH - tPHL) Minimum RL = 54Ω, CL = 50pF, Figure 6 & Figure 7 Typical 250 Driver disable from output high (tHZ) Unit kbps 250 1500 ns 350 1600 ns 200 ns 2500 ns 2500 ns 100 ns 100 ns Driver enable to output high (tZH) Driver enable to output low (tZL) Maximum RL = 500Ω, CL = 50pF, Figure 8 & Figure 10 Driver disable from output low (tLZ) Driver enable from shutdown to output high (tZH(SHDN)) Figure 8 5500 ns Driver enable from shutdown to output low (tZL(SHDN)) Figure 10 5500 ns 600 ns Time to shutdown (tSHDN) 50 200 Receiver Switching Characteristics - SP3070E, SP3071E & SP3072E Unless otherwise noted, VCC = 3.3 ±0.3V, ambient temperature TMIN < TA < TMAX. Typical values are at VCC = 3.3V, ambient temperature TA = 25°C. Table 5: SP3070E, SP3071E & SP3072E Receiver Switching Characteristics Receiver Characteristic Conditions Data signaling rate Duty cycle 40 to 60% Minimum Receiver propagation delay (tPHL, tPLH) 200 ns Propagation delay skew (tPLH - tPHL) CL = 15pF, Figure 11 & Figure 12 30 ns Receiver enable to output high (tZH) Figure 13 50 ns Receiver enable to output low (tZL) Figure 13 50 ns Receiver disable from output high (tHZ) Figure 13 100 ns Receiver disable from output low (tLZ) Figure 13 200 ns Receiver enable from shutdown to output high Figure 13 4000 ns Receiver enable from shutdown to output low Figure 13 4000 ns 600 ns Time to shutdown (tSHDN) 2/24/20 50 Rev 1.0.3 Typical Maximum 250 Unit kbps 200 5 SP3070E - SP3078E Family RS-485/RS-422 Transceivers Data Sheet Switching Characteristics Driver Switching Characteristics - SP3073E, SP3074E & SP3075E Unless otherwise noted, VCC = 3.3 ±0.3V, ambient temperature TMIN < TA < TMAX. Typical values are at VCC = 3.3V, ambient temperature TA = 25°C. Table 6: SP3073E, SP3074E & SP3075E Driver Switching Characteristics Driver Characteristic Conditions Data signaling rate Duty cycle 40 to 60% Driver propagation delay (tPHL, tPLH) Driver output rise / fall time (tR, tF) Driver differential skew (tPLH - tPHL) Minimum RL = 54Ω, CL = 50pF, Figure 6 & Figure 7 Typical 500 Driver disable from output high (tHZ) Unit kbps 180 800 ns 200 800 ns 100 ns 2500 ns 2500 ns 100 ns 100 ns Driver enable to output high (tZH) Driver enable to output low (tZL) Maximum RL = 500Ω, CL = 50pF, Figure 8 & Figure 10 Driver disable from output low (tLZ) Driver enable from shutdown to output high (tZH(SHDN)) Figure 8 4500 ns Driver enable from shutdown to output low (tZL(SHDN)) Figure 10 4500 ns 600 ns Time to shutdown (tSHDN) 50 200 Receiver Switching Characteristics - SP3073E, SP3074E & SP3075E Unless otherwise noted, VCC = 3.3 ±0.3V, ambient temperature TMIN < TA < TMAX. Typical values are at VCC = 3.3V, ambient temperature TA = 25°C. Table 7: SP3073E, SP3074E & SP3075E Receiver Switching Characteristics Receiver Characteristic Conditions Data signaling rate Duty cycle 40 to 60% Minimum Receiver propagation delay (tPHL, tPLH) 200 ns Propagation delay skew (tPLH - tPHL) CL = 15pF, Figure 11 & Figure 12 30 ns Receiver enable to output high (tZH) Figure 13 50 ns Receiver enable to output low (tZL) Figure 13 50 ns Receiver disable from output high (tHZ) Figure 13 50 ns Receiver disable from output low (tLZ) Figure 13 50 ns Receiver enable from shutdown to output high Figure 13 4000 ns Receiver enable from shutdown to output low Figure 13 4000 ns 600 ns Time to shutdown (tSHDN) 2/24/20 50 Rev 1.0.3 Typical Maximum 500 Unit kbps 200 6 SP3070E - SP3078E Family RS-485/RS-422 Transceivers Data Sheet Switching Characteristics Driver Switching Characteristics - SP3076E, SP3077E & SP3078E Unless otherwise noted, VCC = 3.3 ±0.3V, ambient temperature TMIN < TA < TMAX. Typical values are at VCC = 3.3V, ambient temperature TA = 25°C. Table 8: SP3076E, SP3077E & SP3078E Driver Switching Characteristics Driver Characteristic Conditions Data signaling rate Duty cycle 40 to 60% Driver propagation delay (tPHL, tPLH) Driver output rise / fall time (tR, tF) Driver differential skew (tPLH - tPHL) Minimum Typical 16 Driver disable from output high (tHZ) Unit Mbps RL = 54Ω, CL = 50pF, Figure 6 & Figure 8 Driver enable to output high (tZH) Driver enable to output low (tZL) Maximum RL = 500Ω, CL = 50pF, Figure 8 & Figure 10 Driver disable from output low (tLZ) 50 ns 15 ns 8 ns 150 ns 150 ns 100 ns 100 ns Driver enable from shutdown to output high (tZH(SHDN)) Figure 8 1800 ns Driver enable from shutdown to output low (tZL(SHDN)) Figure 10 1800 ns 600 ns Time to shutdown (tSHDN) 50 200 Receiver Switching Characteristics - SP3076E, SP3077E & SP3078E Unless otherwise noted, VCC = 3.3 ±0.3V, ambient temperature TMIN < TA < TMAX. Typical values are at VCC = 3.3V, ambient temperature TA = 25°C. Table 9: SP3076E, SP3077E & SP3078E Receiver Switching Characteristics Receiver Characteristic Conditions Data signaling rate Duty cycle 40 to 60% Minimum Receiver propagation delay (tPHL, tPLH) Propagation delay skew (tPLH - tPHL) CL = 15pF, Figure 11 & Figure 12, -40 to 85°C Receiver enable to output high (tZH) Typical Maximum 16 Unit Mbps 75 ns 8 ns Figure 13 60 ns Receiver enable to output low (tZL) Figure 13 60 ns Receiver disable from output high (tHZ) Figure 13 50 ns Receiver disable from output low (tLZ) Figure 13 50 ns Receiver enable from shutdown to output high Figure 13 3000 ns Receiver enable from shutdown to output low Figure 13 3000 ns 600 ns Time to shutdown (tSHDN) 2/24/20 40 50 Rev 1.0.3 200 7 SP3070E - SP3078E Family RS-485/RS-422 Transceivers Data Sheet Test Circuits and Timing Diagrams Test Circuits and Timing Diagrams A R/2 DI V ID VOD D 0 or 3V R/2 VOC VCC RE Figure 5: Driver DC Test Circuit Figure 6: Receiver DC Test Circuit RL 54Ÿ Y DI OUT R B CL 50pF V OD D Z 3.3V V CC DI 0 Z Y V CC /2 V DIFF -V O tPHL VO 1/2 V VO tPLH 10% tR O 1/2 V V DIFF = V(Y) - V(Z) 90% 90% V SKEW = t PLH - tPHL O 10% tF Figure 7: Driver Propagation Delay Time Test Circuit and Timing Diagram 2/24/20 Rev 1.0.3 8 SP3070E - SP3078E Family RS-485/RS-422 Transceivers Data Sheet Y 0 or V CC DI DE S1 OUT D Z GENERATOR Test Circuits and Timing Diagrams CL = 50pF R L = 500: 50: V CC /2 V CC 0 tZL, tZL(SHDN) V OM = (VOL + V CC ) / 2 0.25V tLZ OUT 0 Figure 8: Driver Enable and Disable Times Test Circuit and Timing Diagram DE = 0 or 3V DI = 0 or 3V A/Y IOSD D B/Z 100 Ÿ -7V to +12V V Figure 9: Driver Contention Test 2/24/20 Rev 1.0.3 9 SP3070E - SP3078E Family RS-485/RS-422 Transceivers Data Sheet Test Circuits and Timing Diagrams VCC Y 0 or V CC DI RL = 500 Ÿ S1 OUT D Z GENERATOR CL = 50pF 50Ÿ V CC V CC / 2 DE 0 tZL, t ZL(SHDN) tLZ V CC OUT V OM = (V OL + V CC ) / 2 V OL 0.25V Figure 10: Driver Enable and Disable Times Test Circuit and Timing Diagram A V ID B R RE OUT CL 15pF A +1V B -1V t PHL OUT tPLH 1.5V V OH V OL Figure 11: Receiver Propagation Delay Test Circuit and Timing Diagram 2/24/20 Rev 1.0.3 10 SP3070E - SP3078E Family RS-485/RS-422 Transceivers Data Sheet S1 S3 1.5V Test Circuits and Timing Diagrams B -1.5V VCC 1k Ÿ A R S2 RE GENERATOR CL = 15pF 50Ÿ Figure 12: Receiver Enable and Disable Times Test Circuit S1 is closed, S2 is open, S3 = -1.5V S1 is open S2 is closed S3 = 1.5V 3V 3V 1.5V RE 1.5V RE tZH, t ZH(SHDN) t ZL, t ZL(SHDN) V OH OUT V OH /2 V CC OUT 0V V OL = V CC /2 V OL S1 is closed, S2 is open, S3 = -1.5V S1 is open S2 is closed S3 = 1.5V 3V RE 3V 1.5V RE tHZ 0.25V OUT 0V 1.5V t LZ V OH V CC OUT 0V 0V 0.25V V OL Figure 13: Receiver Enable and Disable Timing Diagram 2/24/20 Rev 1.0.3 11 SP3070E - SP3078E Family RS-485/RS-422 Transceivers Data Sheet Function Tables Function Tables Table 10: SP3070E, SP3073E, SP3076E (Full Duplex) Table 11: SP3070E, SP3073E, SP3076E (Full Duplex) Transmitting Receiving Inputs Outputs Inputs Output RE DE DI Z Y RE DE AB RO X 1 1 0 1 0 X -50mV 1 X 1 0 1 0 0 X -200mV 0 0 0 X High-Z 1 0 X Shutdown X X Open, Shorted 1 1 1 X High-Z 1 0 X Shutdown Table 12: SP3071E, SP3074E, SP3077E (Full Duplex) Table 13: SP3071E, SP3074E, SP3077E (Full Duplex) Transmitting Receiving Input Outputs Inputs Output DI Z Y A, B RO 1 0 1 -50mV 1 0 1 0 -200mV 0 Open / shorted 1 Table 14: SP3072E, SP3075E, SP3078E (Half Duplex) Table 15: SP3072E, SP3075E, SP3078E (Half Duplex) Transmitting Receiving Inputs Inputs Outputs Output RE DE DI B/Z A/Y RE DE AB RO X 1 1 0 1 0 X -50mV 1 X 1 0 1 0 0 X -200mV 0 0 0 X High-Z 1 0 X Shutdown X X Open / shorted 1 1 1 X High-Z 1 0 X Shutdown 2/24/20 Rev 1.0.3 12 SP3070E - SP3078E Family RS-485/RS-422 Transceivers Data Sheet Pin Information Pin Information Pin Configurations RO 1 RE 2 DE 3 DI 4 8 PIN NSOIC SP3072E SP3075E SP3078E Half Duplex 8 Vcc Vcc 1 7 B RO 2 6 A DI 3 5 GND GND 4 8 PIN NSOIC SP3071E SP3074E SP3077E Full Duplex 8 A 7 B 6 Z 5 Y NC 1 RO 2 RE 3 DE 4 DI 5 GND 6 GND 7 14 Vcc 14 PIN NSOIC SP3070E SP3073E SP3076E Full Duplex 13 NC 12 A 11 B 10 Z 9 Y 8 NC Figure 14: Pin Configurations Pin Descriptions Table 16: Pin Descriptions Pin Number Full Duplex Devices Half Duplex Devices Pin Name Pin Function 1 RO Receiver Output. When RE is low and if (A-B) ≥ -50mV, RO is High. If (A-B) ≤ -200mV, RO is low. - 2 RE 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 hot swap input. 4 - 3 DE 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. 5 3 4 DI 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. 6, 7 4 5 GND Ground 9 5 - Y Noninverting Driver Output 10 6 - Z Inverting Driver Output 11 7 - B Inverting Receiver Input - - 7 B Inverting Receiver Input and Inverting Driver Output 12 8 - A Noninverting Receiver Input - - 6 A Noninverting Receiver Input and Noninverting Driver Output Positive Supply VCC. Bypass VCC to GND with a 0.1µF capacitor No connect. SP3070E SP3071E SP3072E SP3073E SP3074E SP3075E SP3076E SP3077E SP3078E 2 2 3 14 1 8 VCC 1, 8, 13 - - NC 2/24/20 Rev 1.0.3 13 SP3070E - SP3078E Family RS-485/RS-422 Transceivers Data Sheet Detailed Description 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 hot-swap 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 high-impedance 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 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 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. 2/24/20 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 10µA from the high-impedance 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 MaxLinear 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. MaxLinear's engineering team have developed 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 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 ■ ±15kV Airgap Rev 1.0.3 ±8kV using the Contact Discharge method specified in IEC 61000-4-2 14 SP3070E - SP3078E Family RS-485/RS-422 Transceivers Data Sheet ESD Test Conditions Detailed Description free data transmission up to 250kbps. The SP3073E, SP3074E and SP3075E offer higher driver output slew-rate limits, allowing transmit speeds up to 500kbps. ESD performance depends on a variety of conditions. Contact MaxLinear for a reliability report that documents test setup, methodology and results. Low Power Shutdown Mode IEC 61000-4-2 The IEC 61000-4-2 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 610004-2, without the need for additional ESD-protection components. 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. The major difference between tests done using the Human Body Model and IEC 61000-4-2 is higher peak current in IEC 61000-4-2, because series resistance is lower in the IEC 1000-4-2 model. Hence, the ESD withstand voltage measured to IEC 61000-4-2 is generally lower than that measured using the Human Body Model. Enable times tZH and tZL assume the part was not in a lowpower 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). 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. Driver Output Protection 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. Two mechanisms prevent excessive output current and power dissipation caused by faults or by bus contention. First, current limit on the output stage, provides immediate protection against short circuits over the whole commonmode voltage range. Second, a thermal-shutdown circuit, forces the driver outputs into a high-impedance state if the die temperature becomes excessive. 256 Transceivers on the Bus Line Length The standard RS-485 receiver input impedance is 12kΩ (1 unit load), and the standard driver can drive up to 32 unit loads. The SP3070E family of transceivers has 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 as well as other RS-485 transceivers with a total of 32 unit loads or fewer can be connected to the line. The RS-485/RS422 standard covers line lengths up to 4000ft. Reduced EMI and Reflections 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. The SP3070E, SP3071E and SP3072E feature reduced slew-rate drivers that minimize EMI and reduce reflections caused by improperly terminated cables, allowing error- 2/24/20 Typical Applications The SP3072E, SP3075E and SP3078E transceivers are designed for bidirectional data communications on multipoint bus transmission lines. Rev 1.0.3 15 SP3070E - SP3078E Family RS-485/RS-422 Transceivers Data Sheet Parts Selector Guide Parts Selector Guide Table 17: Parts Selector Guide Part Number Half / Full Duplex Data Rate (Mbps) Shutdown Receiver Driver Enable Transceivers on Bus Pin Count Industry Standard Pinout SP3070E Full 0.25 Yes Yes 256 14 MAX3070E, 75180 SP3071E Full 0.25 No No 256 8 MAX3071E, 75179 SP3493 SP3072E Half 0.25 Yes Yes 256 8 MAX3072E, 75176 SP3483 SP3073E Full 0.5 Yes Yes 256 14 MAX3073E, 75180 SP3074E Full 0.5 No No 256 8 MAX3074E, 75179 SP3075E Half 0.5 Yes Yes 256 8 MAX3075E, 75176 SP3494 SP3076E Full 16 Yes Yes 256 14 MAX3076E, 75180 SP3491 SP3077E Full 16 No No 256 8 MAX3077E, 75179 SP3490 SP3078E Half 16 Yes Yes 256 8 MAX3078E, 75176 SP3485, SP3481 2/24/20 Rev 1.0.3 Pin Compatible Upgrade from: 16 SP3070E - SP3078E Family RS-485/RS-422 Transceivers Data Sheet Mechanical Dimensions Mechanical Dimensions NSOIC8 Front View Side View Drawing No: Revision: POD-00000108 A Figure 15: Mechanical Dimension, NSOIC8 2/24/20 Rev 1.0.3 17 SP3070E - SP3078E Family RS-485/RS-422 Transceivers Data Sheet Mechanical Dimensions Mechanical Dimensions NSOIC14 Top View Front View Side View Drawing No: POD-00000109 Revision: A Figure 16: Mechanical Dimensions, NSOIC14 2/24/20 Rev 1.0.3 18 SP3070E - SP3078E Family RS-485/RS-422 Transceivers Data Sheet Ordering Information Ordering Information Table 18: Ordering Information Operating Temperature Range Package Packaging Method Lead-Free(2) Duplex / Data Rate SP3070EEN-L -40°C to 85°C NSOIC14 Tube Yes Full / 250kbps SP3070EEN-L/TR -40°C to 85°C NSOIC14 Reel Yes Full / 250kbps SP3071EEN-L -40°C to 85°C NSOIC8 Tube Yes Full / 250kbps SP3071EEN-L/TR -40°C to 85°C NSOIC8 Reel Yes Full / 250kbps SP3072EEN-L -40°C to 85°C NSOIC8 Tube Yes Half / 250kbps SP3072EEN-L/TR -40°C to 85°C NSOIC8 Reel Yes Half / 250kbps SP3072EMN-L/TR -40°C to 125°C NSOIC8 Reel Yes Half / 250kbps -40°C to 85°C NSOIC14 Reel Yes Full / 500kbps -40°C to 85°C NSOIC8 Reel Yes Full / 500kbps SP3075EEN-L -40°C to 85°C NSOIC8 Tube Yes Half / 500kbps SP3075EEN-L/TR -40°C to 85°C NSOIC8 Reel Yes Half / 500kbps SP3076EEN-L -40°C to 85°C NSOIC14 Tube Yes Full / 16Mbps SP3076EEN-L/TR -40°C to 85°C NSOIC14 Reel Yes Full / 16Mbps SP3076EMN-L/TR -40°C to 125°C NSOIC14 Reel Yes Full / 16Mbps SP3077EEN-L -40°C to 85°C NSOIC8 Tube Yes Full / 16Mbps SP3077EEN-L/TR -40°C to 85°C NSOIC8 Reel Yes Full / 16Mbps SP3078EEN-L -40°C to 85°C NSOIC8 Tube Yes Half / 16Mbps SP3078EEN-L/TR -40°C to 85°C NSOIC8 Reel Yes Half / 16Mbps SP3078EMN-L/TR -40°C to 125°C NSOIC8 Reel Yes Half / 16Mbps Ordering Part Number SP3070E SP3071E SP3072E SP3073E SP3073EEN-L/TR SP3074E SP3074EEN-L/TR SP3075E SP3076E SP3077E SP3078E 1. Refer to http://www.maxlinear.com/SP3070E, http://www.maxlinear.com/SP3071E, http://www.maxlinear.com/SP3072E, http://www.maxlinear.com/ SP3073E, http://www.maxlinear.com/SP3074E, http://www.maxlinear.com/SP3075E, http://www.maxlinear.com/SP3076E, http://www.maxlinear.com/ SP3077E and http://www.maxlinear.com/SP3078E for most up-to-date Ordering Information. 2. Visit www.maxlinear.com for additional information on Environmental Rating. 2/24/20 Rev 1.0.3 19 SP3070E - SP3078E Family RS-485/RS-422 Transceivers Data Sheet Disclaimer MaxLinear, Inc. 5966 La Place Court, Suite 100 Carlsbad, CA 92008 760.692.0711 p. 760.444.8598 f. www.maxlinear.com The content of this document is furnished for informational use only, is subject to change without notice, and should not be construed as a commitment by MaxLinear, Inc. MaxLinear, Inc. assumes no responsibility or liability for any errors or inaccuracies that may appear in the informational content contained in this guide. 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