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| (R) SP486/487 Quad RS-485/RS-422 Line Drivers s s s s s s s s s RS-485 or RS-422 Applications Quad Differential Line Drivers Tri-state Output Control 40ns Typical Driver Propagation Delays 5ns Skew -7V to +12V Common Mode Output Range 100A Supply Current Single +5V Supply Operation Pin Compatible with SN75172, SN75174, LTC486, and LTC487 DESCRIPTION... The SP486 and SP487 are low-power quad differential line drivers meeting RS-485 and RS-422 standards. The SP486 features a common driver enable control; the SP487 provides independent driver enable controls for each pair of drivers. Both feature tri-state outputs and wide common-mode input range. Both are available in 16-pin plastic DIP and SOIC packages. DI1 DO1A DO1B EN DO2B DO2A DI2 GND 1 SP486 1 16 15 VCC DI4 DO4A DO4B EN DO3B DO3A DI3 DI1 DO1A DO1B EN1/EN2 DO2B DO2A DI2 GND 1 SP487 1 16 15 VCC DI4 DO4A DO4B EN3/EN4 DO3B DO3A DI3 2 2 4 3 4 5 6 14 13 12 11 3 4 5 6 4 14 13 12 11 2 7 10 2 7 10 3 8 9 3 8 9 SP486/487 Quad RS-485/RS-422 Line Drivers (c) Copyright 2000 Sipex Corporation 1 ABSOLUTE MAXIMUM RATINGS These are stress ratings only and functional operation of the device at these 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 ............................................................................................ +7V Input Voltages Logic ............................................................. -0.5V to (VCC +0.5V) Drivers .......................................................... -0.5V to (VCC +0.5V) Driver Output Voltage ............................................................. 14V Input Currents Logic .................................................................................. 25mA Driver ................................................................................. 25mA Storage Temperature ............................................ -65C to +150C Power Dissipation Plastic DIP ........................................................................ 375mW (derate 7mW/C above +70C) Small Outline .................................................................... 375mW (derate 7mW/C above +70C) Lead Temperature (soldering, 10 sec) ................................... 300C SPECIFICATIONS VCC = 5V5%; typicals at 25C; TMIN TA TMAX unless otherwise noted. PARAMETER DC CHARACTERISTICS Digital Inputs Voltage VIL VIH Input Current DRIVER OUTPUTS Differential Voltage MIN. TYP. MAX. UNIT CONDITIONS DI, EN, EN, EN1/EN2, EN3/EN4 0.8 2.0 2 5 2 1.5 5 0.2 3 0.2 Volts Volts A Volts Volts Volts Volts Volts Volts Mbps VIN = 0V to VCC IO = 0; unloaded RL = 50(RS-422) RL = 27 (RS-485); Fig. 1 RL = 27 or 50 ; Fig. 1 RL = 27 or 50; Fig. 1 RL = 27 or 50; Fig. 1 2 Change in Output Magnitude for Complementary Output State Common Mode Output Voltage 2.3 Change in Common Mode Output Magnitude for Complementary Output State Maximum Data Rate 10 Short-circuit Current VOH VOL High Impedance Output Current POWER REQUIREMENTS Supply Voltage 4.75 Supply Current RL = 50 (RS-422) RL = 27 (RS-485) -7V VO +10V -7V VO +10V VO = -7V to +10V 2 5.00 0.5 0.5 250 250 200 5.25 10 10 mA mA A Volts A A C C C No load, output enabled No load, output disabled ENVIRONMENTAL AND MECHANICAL Operating Temperature -C 0 +70 -E -40 +85 Storage Temperature -65 +150 Package -_S 16-pin Plastic DIP -_T 16-pin SOIC SP486/487 Quad RS-485/RS-422 Line Drivers (c) Copyright 2000 Sipex Corporation 2 PINOUT -- SP486 DI1 DO1A DO1B EN DO2B DO2A DI2 GND 1 SP486 1 16 15 VCC DI4 DO4A DO4B EN DO3B DO3A DI3 S1 OUTPUT UNDER TEST 500 ohms CL S2 VCC 2 4 3 4 5 6 14 13 12 11 2 7 10 Figure 3. Driver Timing Test Load 3 8 9 Pin 8 -- GND -- Digital Ground. SP486 PINOUT Pin 1 -- DI1 -- Driver 1 Input -- If Driver 1 output is enabled, logic 0 on DI1 forces driver output DO1A low and DO1B high. A logic 1 on DI1 with Driver 1 output enabled forces driver DO1A high and DO1B low. Pin 2 -- DO1A -- Driver 1 output A. Pin 3 -- DO1B -- Driver 1 output B. Pin 4 -- EN -- Driver Output Enable. Please refer to SP486 Truth Table (1). Pin 5 -- DO2B -- Driver 2 output B. Pin 6 -- DO2A -- Driver 2 output A. Pin 7 -- DI2 -- Driver 2 Input -- If Driver 2 output is enabled, logic 0 on DI2 forces driver output DO2A low and DO2B high. A logic 1 on DI2 with Driver 2 output enabled forces driver DO2A high and DO2B low. Pin 9 -- DI3 -- Driver 3 Input -- If Driver 3 output is enabled, logic 0 on DI3 forces driver output DO3A low and DO3B high. A logic 1 on DI3 with Driver 3 output enabled forces driver DO3A high and DO3B low. Pin 10 -- DO3A -- Driver 3 output A. Pin 11 -- DO3B -- Driver 3 output B. Pin 12 -- EN -- Driver Output Disable. Please refer to SP486 Truth Table (1). Pin 13 -- DO4B -- Driver 4 output B. Pin 14 -- DO4A -- Driver 4 output A. Pin 15 -- DI4 -- Driver 4 Input -- If Driver 4 output is enabled, logic 0 on DI4 forces driver output DO4A low and DO4B high. A logic 1 on DI4 with Driver 3 output enabled forces driver DO4A high and DO4B low. A R VDO R B Figure 1. Driver DC Test Load SP486/487 EN CL1 A DI DRIVER B EN Figure 2. Driver Timing Test Quad RS-485/RS-422 Line Drivers (c) Copyright 2000 Sipex Corporation RDIFF VOC CL2 3 PINOUT -- SP487 DI1 DO1A DO1B EN1/EN2 DO2B DO2A DI2 GND 1 INPUT DI SP487 16 15 VCC DI4 DO4A DO4B EN3/EN4 DO3B DO3A DI3 ENABLES EN H H X X L EN X X L L H OUTPUTS OUTA H L H L Hi-Z OUTB L H L H Hi-Z 1 2 H L H L X 4 3 4 5 6 14 13 12 11 2 7 10 Table 1. SP486 Truth Table 3 8 9 Pin 11 -- DO3B -- Driver 3 output B. Pin 12 -- EN3/EN4 -- Driver 3 and 4 Output Enable. Please refer to SP487 Truth Table (2). Pin 16 -- Supply Voltage VCC -- 4.75V VCC 5.25V. SP487 PINOUT Pin 1 -- DI1 -- Driver 1 Input -- If Driver 1 output is enabled, logic 0 on DI1 forces driver output DO1A low and DO1B high. A logic 1 on DI1 with Driver 1 output enabled forces driver DO1A high and DO1B low. Pin 2 -- DO1A -- Driver 1 output A. Pin 3 -- DO1B -- Driver 1 output B. Pin 4 -- EN1/EN2 -- Driver 1 and 2 Output Enable. Please refer to SP487 Truth Table (2). Pin 5 -- DO2B -- Driver 2 output B. Pin 6 -- DO2A -- Driver 2 output A. Pin 7 -- DI2 -- Driver 2 Input -- If Driver 2 output is enabled, logic 0 on DI2 forces driver output DO2A low and DO2B high. A logic 1 on DI2 with Driver 2 output enabled forces driver DO2A high and DO2B low. Pin 8 -- GND -- Digital Ground. Pin 9 -- DI3 -- Driver 3 Input -- If Driver 3 output is enabled, logic 0 on DI3 forces driver output DO3A low and DO3B high. A logic 1 on DI3 with Driver 3 output enabled forces driver DO3A high and DO3B low. Pin 10 -- DO3A -- Driver 3 output A. SP486/487 Pin 13 -- DO4B -- Driver 4 output B. Pin 14 -- DO4A -- Driver 4 output A. Pin 15 -- DI4 -- Driver 4 Input -- If Driver 4 output is enabled, logic 0 on DI4 forces driver output DO4A low and DO4B high. A logic 1 on DI4 with Driver 3 output enabled forces driver DO4A high and DO4B low. Pin 16 -- Supply Voltage VCC -- 4.75V VCC 5.25V. FEATURES... The SP486 and SP487 are low-power quad differential line drivers meeting RS-485 and RS-422 standards. The SP486 features active high and active low common driver enable controls; the SP487 provides independent, active high driver enable controls for each pair of drivers. The driver outputs are short-circuit limited to 200mA. Data rates up to 10Mbps are supported. Both are available in 16-pin plastic DIP and SOIC packages. INPUT DI H L X ENABLES EN1/EN2 or EN3/EN4 H H L OUTPUTS OUTA H L Hi-Z OUTB L H Hi-Z Table 2. SP487 Truth Table Quad RS-485/RS-422 Line Drivers (c) Copyright 2000 Sipex Corporation 4 3V DI 0V tPLH B A VO F = 1MHZ: tr < 10ns: tf < 10ns 1.5V tPHL 1.5V 1 2VO tSKEW 90% 10% 1 2VO tSKEW VO -VO tr Figure 4. Driver Propagation Delays VDIFF = V(A) - V(B) 90% 10% tf AC PARAMETERS VCC = 5V5%; typicals at 25C; 0C TA +70C unless otherwise noted. PARAMETER PROPAGATION DELAY Driver Input to Output Low to High (tPLH) High to Low (tPHL) Driver Output to Output (tSKEW) Driver Rise Time (tR) SP486 SP487 Driver Fall Time (tF) SP486 SP487 DRIVER ENABLE To Output High To Output Low DRIVER DISABLE From Output Low From Output High MIN. TYP. MAX. UNIT CONDITIONS RDIFF = 54 Ohms, CL1= CL2= 100pF; Figure 2 20 20 40 40 5 20 20 20 20 60 60 60 60 15 ns ns ns 10% to 90% ns ns 90% to 10% ns ns 110 115 ns ns CL = 100pF; Figures 3 and 5 (S2 closed) CL = 100pF; Figures 3 and 5 (S1 closed) CL = 15pF; Figures 3 and 5 (S1 closed) CL = 15pF; Figures 3 and 5 (S2 closed) 60 60 130 130 ns ns SP486/487 Quad RS-485/RS-422 Line Drivers (c) Copyright 2000 Sipex Corporation 5 EN 3V 0V tZL F = 1MHZ: tr < 10ns: tf < 10ns 1.5V tLZ 1.5V A, B 5V VOL VO 2.3V Output normally low Output normally high 2.3V tZH tHZ 0.5V VOH 0V 0.5V Figure 5. Driver Enable/Disable Timing ORDERING INFORMATION Quad RS485 Drivers: Model .................................. Enable/Disable ........................ Temperature Range ......................... Package SP486CS .......... Common; active Low and Active High ............ 0C to +70C .................. 16-pin Plastic DIP SP486CT .......... Common; active Low and Active High ............ 0C to +70C ........................... 16-pin SOIC SP486ES .......... Common; active Low and Active High .......... -40C to +85C ................ 16-pin Plastic DIP SP486ET .......... Common; active Low and Active High .......... -40C to +85C ......................... 16-pin SOIC SP487CS ............... One per driver pair; active High ................. 0C to +70C .................. 16-pin Plastic DIP SP487CT ............... One per driver pair; active High ................. 0C to +70C ........................... 16-pin SOIC SP487ES ............... One per driver pair; active High ............... -40C to +85C ................ 16-pin Plastic DIP SP487ET ............... One per driver pair; active High ............... -40C to +85C ......................... 16-pin SOIC SP486/487 Quad RS-485/RS-422 Line Drivers (c) Copyright 2000 Sipex Corporation 6 Corporation SIGNAL PROCESSING EXCELLENCE Sipex Corporation Headquarters and Sales Office 22 Linnell Circle Billerica, MA 01821 TEL: (978) 667-8700 FAX: (978) 670-9001 e-mail: sales@sipex.com Sales Office 233 South Hillview Drive Milpitas, CA 95035 TEL: (408) 934-7500 FAX: (408) 935-7600 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 hereing; neither does it convey any license under its patent rights nor the rights of others. SP486/487 Quad RS-485/RS-422 Line Drivers (c) Copyright 2000 Sipex Corporation 7 |
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