® SP486/487 Quad RS-485/RS-422 Line Drivers ■ ■ ■ ■ ■ ■ ■ ■ ■ 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 100µA 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 1 SP486 16 VCC DI1 1 1 DO1A SP487 16 VCC 15 DI4 1 15 2 DI4 DO1A 2 4 4 DO1B 3 14 DO4A DO1B 3 14 DO4A EN 4 13 DO4B EN1/EN2 4 13 DO4B DO2B 5 12 EN DO2B 5 12 EN3/EN4 DO2A 6 11 DO3B DO2A 6 11 DO3B 10 DO3A 9 DI3 2 DI2 2 10 7 DO3A DI2 3 GND SP486/487 8 7 3 9 DI3 GND 8 Quad RS-485/RS-422 Line Drivers 1 © Copyright 2000 Sipex Corporation 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 ............................................ –65°C to +150°C Power Dissipation Plastic DIP ........................................................................ 375mW (derate 7mW/°C above +70°C) Small Outline .................................................................... 375mW (derate 7mW/°C above +70°C) Lead Temperature (soldering, 10 sec) ................................... 300°C SPECIFICATIONS VCC = 5V±5%; typicals at 25°C; TMIN ≤ TA ≤ TMAX unless otherwise noted. PARAMETER DC CHARACTERISTICS Digital Inputs Voltage VIL VIH Input Current DRIVER OUTPUTS Differential Voltage MIN. TYP. MAX. UNIT DI, EN, EN, EN1/EN2, EN3/EN4 0.8 2.0 Volts Volts µA VIN = 0V to VCC 5 0.2 Volts Volts Volts Volts IO = 0; unloaded RL = 50Ω(RS-422) RL = 27Ω (RS-485); Fig. 1 RL = 27Ω or 50Ω ; Fig. 1 3 0.2 Volts Volts RL = 27Ω or 50Ω; Fig. 1 RL = 27Ω or 50Ω; Fig. 1 ±2 5 2 1.5 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 Mbps ±2 ±250 ±250 ±200 mA mA µA 5.00 0.5 0.5 5.25 10 10 Volts µA µA 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 CONDITIONS Quad RS-485/RS-422 Line Drivers 2 RL = 50Ω (RS-422) RL = 27Ω (RS-485) –7V ≤VO ≤ +10V –7V ≤VO ≤ +10V VO = –7V to +10V No load, output enabled No load, output disabled °C °C °C © Copyright 2000 Sipex Corporation PINOUT — SP486 DI1 1 SP486 16 VCC 15 DI4 S1 1 DO1A 2 OUTPUT UNDER TEST 4 DO1B 3 14 DO4A EN 4 13 DO4B DO2B 5 12 EN DO2A 6 11 DO3B 10 DO3A 9 DI3 VCC 500 ohms CL S2 2 DI2 7 Figure 3. Driver Timing Test Load 3 GND 8 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 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 2 — DO1A — Driver 1 output A. Pin 11 — DO3B — Driver 3 output B. Pin 3 — DO1B — Driver 1 output B. Pin 12 — EN — Driver Output Disable. Please refer to SP486 Truth Table (1). Pin 4 — EN — Driver Output Enable. Please refer to SP486 Truth Table (1). Pin 13 — DO4B — Driver 4 output B. Pin 5 — DO2B — Driver 2 output B. Pin 14 — DO4A — Driver 4 output A. Pin 6 — DO2A — Driver 2 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 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. A EN CL1 R A VDO DI R RDIFF VOC B B CL2 EN Figure 1. Driver DC Test Load SP486/487 DRIVER Figure 2. Driver Timing Test Quad RS-485/RS-422 Line Drivers 3 © Copyright 2000 Sipex Corporation PINOUT — SP487 INPUT ENABLES OUTPUTS DI EN EN OUTA OUTB 16 VCC H H X H L 15 DI4 L H X L H 3 14 DO4A H X L H L EN1/EN2 4 13 DO4B L X L L H DO2B 5 12 EN3/EN4 X L H Hi–Z Hi–Z DO2A 6 11 DO3B 10 DO3A 9 DI3 DI1 1 DO1A 2 DO1B SP487 1 4 Table 1. SP486 Truth Table 2 DI2 7 GND 8 3 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. Pin 13 — DO4B — Driver 4 output B. Pin 14 — DO4A — Driver 4 output A. 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 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 2 — DO1A — Driver 1 output A. Pin 16 — Supply Voltage VCC — 4.75V ≤ VCC ≤ 5.25V. Pin 3 — DO1B — Driver 1 output B. 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. 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. INPUT 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 ENABLES OUTPUTS DI EN1/EN2 or EN3/EN4 OUTA OUTB H H H L L H L H X L Hi–Z Hi–Z Table 2. SP487 Truth Table Quad RS-485/RS-422 Line Drivers 4 © Copyright 2000 Sipex Corporation F = 1MHZ: tr < 10ns: tf < 10ns 3V DI 0V 1.5V 1.5V tPHL tPLH B A VO 1 2VO 1 2VO tSKEW tSKEW VDIFF = V(A) – V(B) VO –VO 90% 10% 90% 10% tr tf Figure 4. Driver Propagation Delays AC PARAMETERS VCC = 5V±5%; typicals at 25°C; 0°C ≤ TA ≤ +70°C 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 MIN. TYP. MAX. UNIT RDIFF = 54 Ohms, CL1= CL2= 100pF; Figure 2 20 20 40 40 5 60 60 15 ns ns ns 10% to 90% 20 20 ns ns 20 20 ns ns 90% to 10% 60 110 ns 60 115 ns DRIVER DISABLE From Output Low 60 130 ns From Output High 60 130 ns To Output Low SP486/487 CONDITIONS Quad RS-485/RS-422 Line Drivers 5 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) © Copyright 2000 Sipex Corporation EN F = 1MHZ: tr < 10ns: tf < 10ns 3V 1.5V 0V 1.5V tLZ tZL A, B 5V VOL VO VOH 0V 2.3V Output normally low 0.5V Output normally high 2.3V 0.5V tZH tHZ Figure 5. Driver Enable/Disable Timing ORDERING INFORMATION Quad RS485 Drivers: Model .................................. Enable/Disable ........................ Temperature Range ......................... Package SP486CS .......... Common; active Low and Active High ............ 0°C to +70°C .................. 16–pin Plastic DIP SP486CT .......... Common; active Low and Active High ............ 0°C to +70°C ........................... 16–pin SOIC SP486ES .......... Common; active Low and Active High .......... –40°C to +85°C ................ 16–pin Plastic DIP SP486ET .......... Common; active Low and Active High .......... –40°C to +85°C ......................... 16–pin SOIC SP487CS ............... One per driver pair; active High ................. 0°C to +70°C .................. 16–pin Plastic DIP SP487CT ............... One per driver pair; active High ................. 0°C to +70°C ........................... 16–pin SOIC SP487ES ............... One per driver pair; active High ............... –40°C to +85°C ................ 16–pin Plastic DIP SP487ET ............... One per driver pair; active High ............... –40°C to +85°C ......................... 16–pin SOIC SP486/487 Quad RS-485/RS-422 Line Drivers 6 © Copyright 2000 Sipex Corporation 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: [email protected] 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 7 © Copyright 2000 Sipex Corporation