Preliminary ® SP26LV431 High Speed, +3.3V Quad RS-422 Differential Line Driver ■ Quad Differential Line Drivers ■ Compatible with the EIA standard for RS-422 serial protocol ■ High-Z Output Control ■ At Least 60Mbps Transmission Rates ■ 11ns Typical Driver Propagation Delays ■ Less than 1ns Typical Output Skew ■ Single +3.3V Supply Operation ■ Common Driver Enable Control ■ Compatibility with the industry standard 26LV31 ■ Ideal For Use with SP26LV432, Quad Receivers DI1 D01A 2 D01B 3 ENABLE 16 VCC 1 SP26LV431 4 D02B 5 D02A 6 DI2 7 GND 8 15 DI4 14 D04A 13 D04B 12 ENABLE 11 D0 B 3 10 D0 A 3 9 DI 3 DESCRIPTION The SP26LV431 is a quad differential line driver that meets the specifications of the EIA standard RS-422 serial protocol. The SP26LV431 features Sipex's BiCMOS process allowing low power operational characteristics of CMOS technology while meeting all of the demands of the RS-422 serial protocol over 60Mbps under load. The RS-422 protocol allows up to 10 receivers to be connected to a multipoint bus transmission line. The SP26LV431 features a driver enable control common to all four drivers that places the output pins in a high impedance state. Since the cabling can be as long as 4,000 feet, the RS-422 drivers of the SP26LV431 are equipped with a wide common-mode output voltage range to accommodate ground potential differences. TYPICAL APPLICATION CIRCUIT INPUTS VCC DI4 ENABLE ENABLE Input NonInverting A Output Inverting B Output LOW HIGH don't care high-Z high-Z ENABLE HIGH don't care LOW LOW HIGH ENABLE don't care LOW HIGH HIGH LOW DI3 DI2 DI1 DO A DO B DO A DO B DO A DO B DO A DO B 3 4 3 2 2 1 1 4 GND Rev: A Date: 2/08/04 SP26LV431 High Speed, +3.3V Quad RS-422 Differential Line Driver 1 OUTPUTS © Copyright 2004 Sipex Corporationn 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 and cause permanent damage to the device. VCC........................................................................................0.5V to 7.0V VIN (DC Input Voltage).............................................-1.5V to (VCC + 1.5V) VOUT (DC Output Voltage)......................................................-0.5V to 7V IIK, IOK (Clamp Diode Current)........................................................±20mA IOUT (DC Output Current, per pin)................................................±150mA ICC (DC VCC or GND Current, per pin)..........................................±150mA TSTG (Storage Temperature Range)...............................-65°C to +150°C Storage Temperature....................................................-65°C to +150°C Power Dissipation Per Package 16-pin PDIP (derate 14.3mW/oC above +70oC).........................1150mW 16-pin NSOIC (derate 13.6mW/oC above +70oC)......................1100mW ELECTRICAL CHARACTERISTICS Unless otherwise noted, the following specifications apply for VCC = +3.0V to +3.6V with Tamb = 25°C and all MIN and MAX limits apply across the recommended operating temperature range. DC PARAMETERS MIN. TYP. MAX. Supply Voltage, VCC 3.0 DC Input or Output Voltage, VIN or VOUT UNITS 3.6 V VCC V CONDITIONS Input Electrical Characteristics Input Rise or Fall Times, tr or tf HIGH Level Input Voltage, VIH 3 ns 2.0 V 0.8 LOW Level Input Voltage, VIL V Output Electrical Characteristics HIGH Level Output Voltage, VOH 2.5 0.2 LOW Level Output Voltage, VOL Differential Output Voltage, VT 2.9 2.0 0.5 2.7 V VIN = VIH or VIL, IOUT = -20mA V VIN = VIH or VIL, IOUT = 20mA V RL = 100Ω, Note 1 Difference in Differential Output, |VT| - |VT| 0.4 V RL = 100Ω, Note 1 Common Mode Output Voltage, VOS 3.0 V RL = 100Ω, Note 1 Difference in Common Mode Output, |VOS -VOS| 0.4 V RL = 100Ω, Note 1 100 µA VIN = VCC or GND, Note 2 µA VOUT = VCC or GND, ENABLE = VIL, ENABLE = VIH -150 mA VIN = VCC or GND, Notes 1 and 3 IOFF 100 µA VCC = 0V, VOUT = 6V, Note 1 IOFF -100 µA VCC = 0V, VOUT = -0.25V, Note 1 Quiescent Supply Current ICC Tri-state Output Leakage Current, IOZ Output Short Circuit Current, ISC ± 2.0 -30 Output Leakage Current Power Off Rev: A Date: 3/08/04 SP26LV431 High Speed, +3.3V Quad RS-422 Differential Line Driver 2 © Copyright 2004 Sipex Corporation ELECTRICAL CHARACTARISTICS (continued) Unless otherwise noted, the following specifications apply for VCC = +3.0V to +3.6V, Tamb = 25°C, tr < 6ns, tf < 6ns, and all MIN and MAX limits apply across the recommended operating temperature range. PARAMETERS MIN. TYP. MAX. UNITS CONDITIONS SWITCHING CHARACTERISTICS Propagation Delays, tPLHD, tPHLD 11 18 ns Figure 3 Skew 0.8 2 ns Figure 3, Note 4 Differential Ouput Rise and Fall Times, tTLH, tPHL 10 ns Figure 3 Output Enable Time, tPZH 4 40 ns Figure 5 Output Enable Time, tPZL 40 ns Figure 5 Output Disable Time, tPHZ 35 ns Figure 5, Note 5 Output Disable Time, tPLZ 35 ns Figure 5, Note 5 Note 6 Power dissipation Capacitance, CPD 50 pF Input Capacitance, CIN 6 pF NOTE 1: Refer to EIA specifications for RS-422 serial protocol for exact test conditions. NOTE 2: Measured per input. All other inputs at VCC or GND. NOTE 3: This is the current sourced when a high output is shorted to GND. Only one output at a time should be shorted. NOTE 4: Skew is defined as the difference in propagation delays between complementary outputs at the 50% input. NOTE 5: Output disable time is the delay from ENABLE or ENABLE being switched to the output transistors turning off. The actual disable times are less than indicated due to the delay added by the RC time constant of the load. NOTE 6: CPD determines the no load dynamic power consumption, PD = (CPDVCC2 f) + (ICCVCC), and the no load dynamic current consumption, IS = (CPDVCCf) + ICC. INPUTS VCC DI4 DI3 DI2 DI1 ENABLE ENABLE DO A DO B DO A DO B DO A DO B DO A DO B 3 4 3 2 2 1 1 4 OUTPUTS GND Figure 1. SP431 Block Diagram Rev: A Date: 2/08/04 SP26LV431 High Speed, +3.3V Quad RS-422 Differential Line Driver 3 © Copyright 2004 Sipex Corporationn AC TEST CIRCUITS AND SWITCHING TIME WAVEFORMS f=1 MHz tR < 10ns, tF < 10ns 3V DRIVER INPUT DIX tPLHD CL DIX Generator CL D DRIVER D0XB VOH 0V (Differential) D0XA RL 0V DRIVER D0XA VOL 80% CL DIFFERENTIAL OUTPUT 80% 0V 0V VDIFF = VA - VB 20% tTLH Figure 2. AC Test Circuit VCC GND tPHLD D0XB 50Ω Driver Enabled 1.5V 1.5V 20% tTHL Figure 3. Propagation Delays Test Point D0XA S1 S2 S3 1.5V ENABLE 110Ω D0XB 3V ENABLE VCC Input = ENABLE or ENABLE S1= VCC S2 = D0XA S3 = GND and/or S1 = GND tPLZ S2 = D0XB S3 = GND CL ENABLE ENABLE If ENABLE is the selected input, then ENABLE = HIGH If ENABLE is the selected input, then ENABLE = LOW Input = ENABLE or ENABLE S1= GND S2 = D0XB S3 = VCC and/or S1 = VCC S2 = D0XA S3 = VCC To force the driver outputs into high-Z, ENABLE = LOW ENABLE = HIGH Figure 4. Driver Single-Ended TRI-STATE Test Circuit 1.5V 0V tPHZ tPZH VOH VOH = 0.3V 1.3V GND tPZL VCC VOL+ 0.3V 1.3V VOL Figure 5. Driver Single-Ended TRI-STATE Waveforms 3.0V INPUT 0.0V OUTPUT (DIFFERENTIAL) 90% 90% 10% 10% tTLH tTHL Input pulse: f = 1MHz, 50% tr < 6ns tf < 6ns Figure 6. Differential Rise and Fall Times Rev: A Date: 3/08/04 SP26LV431 High Speed, +3.3V Quad RS-422 Differential Line Driver 4 © Copyright 2004 Sipex Corporation THEORY OF OPERATION The SP26LV431 is a low-power quad differential line driver designed for digital data transmission meeting the specifications of the EIA standard RS-422 serial protocol. The SP26LV431 features Sipex's BiCMOS process allowing low power operational characteristics of CMOS technology while meeting all of the demands of the RS-422 serial protocol up to 60Mbps under load in harsh environments. source and sink current capability. All drivers are internally protected against short circuits on their outputs. The driver outputs are short-circuit limited to 150mA. The driver output skew times are typically 0.8ns. To minimize reflections, the multipoint bus transmission line should be terminated at both ends in its characteristic impedance, and stub lengths off the main line should be kept as short as possible. The RS-422 standard is ideal for multi-drop applications and for long-distance communication. The RS-422 protocol allows up to 10 receivers to be connected to a data bus, making it an ideal choice for multi-drop applications. Since the cabling can be as long as 4,000 feet, RS-422 drivers are equipped with a wide common mode output range to accommodate ground potential differences. Because the RS-422 is a differential interface, data is virtually immune to noise in the transmission line. ENABLE ENABLE DATA The SP26LV431 accepts TTL or CMOS input levels and translates these to RS-422 output levels. The SP26LV431 features active HIGH and active LOW driver enable controls common to all four driver channels see Figure 8. A logic HIGH on the ENABLE pin (pin 4) or a logic LOW on the ENABLE pin (pin 12) will enable the differential driver outputs. A logic LOW on the ENABLE pin (pin 4) and a logic HIGH on the ENABLE pin (pin 12) will force the driver outputs into high impedance (high-Z). Refer to the truth table in Figure 8. DATA OUTPUT *RT *RT is optional although highly recommended to reduce reflection. The RS-422 line driver outputs feature high Figure 7. Two-Wire Balanced System, RS-422 ENABLE ENABLE Input NonInverting A Output Inverting B Output LOW HIGH don't care high-Z high-Z HIGH don't care LOW LOW HIGH don't care LOW HIGH HIGH LOW Figure 8. Truth Table, Enable / Disable Function Common to All Four RS-422 Drivers Rev: A Date: 2/08/04 SP26LV431 High Speed, +3.3V Quad RS-422 Differential Line Driver 5 © Copyright 2004 Sipex Corporationn 12.0 12.5 VCC = 3.0V 12.0 11.5 tPHLD 11.0 Differential Prop. Delay (ns) Differential Prop. Delay (ns) 11.5 tPHLD 10.5 10.0 9.5 tPHLD 11.0 10.5 tPHLD 10.0 9.0 9.5 8.5 8.0 -40 -15 10 35 60 9.0 3.0 85 3.1 3.2 Temperature (°C) 3.4 3.5 3.6 Figure 10. Differential Propagation Delay vs Voltage Figure 9. Differential Propagation Delay vs Temperature 1.25 1.8 1.15 VCC = 3.3V 1.6 1.05 1.4 0.95 Differential Skew (ns) Differential Skew (ns) 3.3 Power Supply Voltage (V) 0.85 0.75 0.65 0.55 1.2 1.0 0.8 0.6 0.45 0.4 0.35 0.2 0.25 -40 -15 10 35 60 0.0 3.0 85 3.1 Temperature (°C) 3.2 3.3 3.4 3.5 3.6 Power Supply Voltage (V) Figure 12. Differential Skew vs Voltage Figure 11. Differential Skew vs Temperature 5.0 8 VCC = 3.3V 4.5 Differential Transition Time (ns) Differential Transition Time (ns) 7 6 5 tTLH 4 tTHL tTLH 3.5 3.0 2.5 3 2 -40 tTHL 4.0 -15 10 35 60 2.0 3.0 85 3.2 3.3 3.4 3.5 3.6 Figure 14. Differential Transition Time vs Voltage Figure 13. Differential Transition Time vs Temperature Rev: A Date: 3/08/04 3.1 Power Supply Voltage (V) Temperature (°C) SP26LV431 High Speed, +3.3V Quad RS-422 Differential Line Driver 6 © Copyright 2004 Sipex Corporation 1.2 0.80 Vcc = 3.3V 0.75 Complementary Skew (ns) Complementary Skew (ns) 1.0 0.8 0.6 0.4 0.70 0.65 0.60 0.55 0.2 -40 -15 10 35 60 0.50 3.0 85 3.1 3.2 3.3 3.4 3.5 3.6 Power Supply Voltage (V) Temperature (°C) Figure 16. Complementary Skew vs Voltage Figure 15. Complementary Skew vs Temperature 3.3 3.6 3.1 3.2 Differential Output Voltage (V) Differential Output Voltage (V) VCC = 3.3V 2.9 2.7 2.5 T= -40°C 2.3 2.1 T=+25°C 1.9 VCC = 3.6V 2.8 VCC = 3.3V 2.4 VCC = 3.0V 2.0 1.6 T= +85°C 1.7 1.2 0 1.5 0 15 30 45 1 3 60 4 6 Output Current (mA) Output Current (mA) Figure 18. Differential VOUT vs IOUT (VCC ) Figure 17. Differential VOUT vs IOUT (Temperature) 3.6 3.3 VCC = 3.3V 3.2 3.1 Output High Voltage (V) Output High Voltage (V) VCC = 3.6V 2.9 T= -40°C 2.7 T=+25°C 2.5 T= +85°C 2.3 2.8 VCC = 3.3V 2.4 VCC = 3.0V 2.0 1.6 1.2 2.1 0 1 3 4 0 6 3 4 6 Figure 20. VOUT high vs IOUT (VCC ) Figure 19. VOUT high vs IOUT (Temperature) Rev: A Date: 2/08/04 1 Output High Current (mA) Output High Current (mA) SP26LV431 High Speed, +3.3V Quad RS-422 Differential Line Driver 7 © Copyright 2004 Sipex Corporationn 0.7 0.6 VCC = 3.3V VCC = 3.0V T= +85°C 0.6 0.5 Output Low Voltage (V) Output Low Voltage (V) VCC = 3.3V 0.5 T=+25° 0.4 T= -40°C 0.3 0.4 VCC = 3.6V 0.3 0.2 0.2 0.1 0.1 0.0 0.0 0 1 3 4 0 6 1 3 4 6 Output Low Current (mA) Output Low Current (mA) Figure 22. VOUT low vs Current (VCC) Figure 21. VOUT low vs Current (Temperature) 3.5 2.5 VCC = 3.0V DIN = 3.0V 3.0 Supply Current (uA) Supply Current (µA) 2.0 1.5 1.0 2.5 2.0 1.5 1.0 0.5 0.5 0.0 -40 -15 10 35 60 0.0 3.0 85 Temperature (°C) 3.1 3.3 3.4 3.5 3.6 Figure 24. Supply Current vs Voltage Figure 23. Supply Current vs Temperature 50 104 VCC = 3.0V VCC = 3.0V 102 No Load Supply Current (mA) 40 No Load Supply Current (mA) 3.2 Power Supply Voltage (V) 30 20 10 100 98 96 94 92 0 1 10 100 1,000 10,000 90 100,000 1 Data Rate (kBaud) 10 100 1,000 10,000 100,000 Data Rate (kBaud) Figure 26. ICC (loaded) vs Data Rate Figure 25. Supply Current vs Data Rate Rev: A Date: 3/08/04 SP26LV431 High Speed, +3.3V Quad RS-422 Differential Line Driver 8 © Copyright 2004 Sipex Corporation 65 50 Vcc=3.0V Output Short Circuit Current (mA) Output Short Circuit Current (mA) 48 46 44 42 40 60 55 50 45 38 36 -40 40 -15 10 35 60 85 3.0 Temperature (°C) 3.2 3.3 3.4 3.5 3.6 Power Supply Voltage (V) Figure 27. Short Circuit Current vs Temperature Rev: A Date: 2/08/04 3.1 Figure 28. Short Circuit Current vs Voltage SP26LV431 High Speed, +3.3V Quad RS-422 Differential Line Driver 9 © Copyright 2004 Sipex Corporationn PIN DESCRIPTION DI1 D01A 2 D01B 3 ENABLE 16 VCC 1 SP26LV431 4 D02B 5 D02A 6 DI2 7 GND 8 15 DI4 14 D04A 13 D04B 12 ENABLE 11 D0 B 3 10 D0 A 3 9 DI 3 PINOUT PIN ASSIGNMENTS PIN NUMBER PIN NAME DESCRIPTION 1 DI1 2 D01A Non-inverted driver output. 3 D01B Inverted driver output. 4 ENABLE 5 D02B Inverted driver output. 6 D02A Non-inverted driver output. 7 DI2 8 GND 9 DI3 10 D03A Non-inverted driver output. 11 D03B Inverted driver output. 12 ENABLE 13 D04B Inverted driver output. 14 D04A Non-inverted driver output. 15 DI4 Driver 4 TTL input. 16 VCC +3.0V to +3.6V power supply. Rev: A Date: 3/08/04 Driver 1 TTL input. Driver output enable, active HIGH. Driver 2 TTL input. Ground. Driver 3 TTL input. Driver output enable, active LOW. SP26LV431 High Speed, +3.3V Quad RS-422 Differential Line Driver 10 © Copyright 2004 Sipex Corporation PACKAGE: 16 Pin PDIP A1 D A N A2 D1 b3 b1 b e INDEX AREA L E1 E 1 2 3 Dimensions in (mm) A 16 PIN PDIP JEDEC MS-001 (BB) Variation MIN NOM MAX - - .210 - - A1 .015 A2 .115 .130 .195 b .014 .018 .022 b2 .045 .060 .070 b3 .030 .039 .045 E c c .008 .010 .014 eA .755 .775 eB D .735 D1 .005 - - E .300 .310 .325 E1 .240 .250 .280 e .100 BSC eA .300 BSC SEE LEAD DETAIL b eB - - .430 L .115 .130 .150 C 16 pin PDIP Rev: A Date: 2/08/04 SP26LV431 High Speed, +3.3V Quad RS-422 Differential Line Driver 11 © Copyright 2004 Sipex Corporationn PACKAGE: 16 Pin NSOIC D A E/2 E1 E SEE VIEW C E1/2 1 e b B INDEX AREA (D/2 X E1/2) Ø1 TOP VIEW b WITH PLATING Gauge Plane L2 Seating Plane c Ø1 Ø L L1 VIEW C BASE METAL CONTACT AREA DIMENSIONS Minimum/Maximum (mm) 16 Pin NSOIC (JEDEC MS-012, AC - VARIATION) COMMON HEIGHT DIMENSION SYMBOL A A1 A2 b c E E1 e L L1 L2 Ø Ø1 A2 A A1 SIDE VIEW MIN NOM MAX 1.75 1.35 0.25 0.10 1.25 1.65 0.31 0.51 0.17 0.25 6.00 BSC 3.90 BSC 1.27 BSC 0.40 1.27 1.04 REF 0.25 BSC 0º 8º 5º 15º 16 PIN NSOIC Rev: A Date: 3/08/04 SP26LV431 High Speed, +3.3V Quad RS-422 Differential Line Driver 12 © Copyright 2004 Sipex Corporation ORDERING INFORMATION Model .................................................................................... Temperature Range ..................................................................................... Package SP26LV431CP ............................................................................. 0°C to +70°C ........................................................................... 16–pin Plastic DIP SP26LV431CN ............................................................................ 0°C to +70°C .......................................................................... 16–pin Narrow SOIC Please consult the factory for pricing and availability on a Tape-On-Reel option. REVISION HISTORY DATE 3/08/04 REVISION A DESCRIPTION Production Release. Corporation ANALOG EXCELLENCE Sipex Corporation Headquarters and Sales Office 233 South Hillview Drive Milpitas, CA 95035 TEL: (408) 934-7500 FAX: (408) 935-7600 Sales Office 22 Linnell Circle Billerica, MA 01821 TEL: (978) 667-8700 FAX: (978) 670-9001 e-mail: [email protected] Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights nor the rights of others. Rev: A Date: 2/08/04 SP26LV431 High Speed, +3.3V Quad RS-422 Differential Line Driver 13 © Copyright 2004 Sipex Corporationn