SP3486 and SP3487 ® +3.3V Low Power Quad RS-485/RS-422 Line Drivers ■ RS-485 or RS-422 Quad Differential Line Drivers ■ Operates from a single +3.3V supply ■ Interoperable with +5.0V logic ■ Tri-state Output Control ■ -7V to +12V Common-Mode Input Voltage Range ■ Common Driver Enable Control (SP3486) ■ Independent Driver Enable Controls for each pair of Drivers (SP3487) ■ Compatibility with LTC486 and SN75172 (SP3486) ■ Compatibility with LTC487 and SN75174 (SP3487) DESCRIPTION The SP3486 and the SP3487 are +3.3V low power quad drivers that meet the specifications of the RS-485 and RS-422 serial protocols. These devices are pin-to-pin compatible with Sipex's SP486 and SP487 devices as well as popular industry standards. The SP3486 and SP3487 feature Sipex's BiCMOS process allowing low power operation without sacrificing performance. The SP3486 and SP3487 meet the electrical specifications of RS-485 and RS-422 serial protocols up to 10Mbps under load. The SP3486 features a common driver enable control. The SP3487 provides independent driver enable controls for each pair of drivers. Both devices feature tri-state outputs and a -7V to +12V common-mode input voltage range. DI1 1 SP3486 16 VCC 15 DI4 16 VCC 15 DI4 14 DO4A 4 13 DO4B DO2B 5 12 EN3/EN4 DO2A 6 11 DO3B 10 DO3A 9 DI3 DI1 1 1 SP3487 1 DO1A 2 DO1A 2 DO1B 3 14 DO4A DO1B 3 EN 4 13 DO4B EN1/EN2 DO2B 5 12 EN DO2A 6 11 DO3B DI2 7 10 DO3A GND 8 9 DI3 4 4 2 2 DI2 3 10/15/02 7 3 GND 8 SP3486/3487 Low Power Quad RS485/422 Line Drivers 1 © Copyright 2002 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 ......................................................................................... +6.0V Input Voltages Logic ............................................................ –0.3V to +6.0V Drivers ......................................................... –0.3V to +6.0V 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 = 3.3V±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. CONDITIONS DI, EN, EN, EN1/EN2, EN3/EN4 0.8 Volts Volts µA VIN = 0V to VCC VCC Volts Volts Volts unloaded R = 50Ω(RS-422) R = 27Ω (RS-485); Figure 1 3 0.2 Volts Volts R = 27Ω or 50Ω; Figure 1 R = 27Ω or 50Ω; Figure 1 R = 50Ω (RS-422) R = 27Ω (RS-485) 2.0 ±2 VCC 2 1.5 Common Mode Output Voltage 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 3.00 Supply Current Mbps 3.30 3.00 0.10 ±250 ±250 1 mA mA µA 3.60 Volts µA µA ENVIRONMENTAL AND MECHANICAL Operating Temperature –C 0 +70 –E -40 +85 Storage Temperature -65 +150 Package –_P 16–pin Plastic DIP –_T 16–pin SOIC 10/15/02 UNIT SP3486/3487 Low Power Quad RS485/422 Line Drivers 2 -7V ≤VO ≤ +12V -7V ≤VO ≤ +12V VO = -7V to +12V, TA=25oC No load, output enabled No load, output disabled °C °C °C © Copyright 2000 Sipex Corporation PINOUT — SP3486 VDM DI1 1 DO1A 2 DO1B 3 SP3486 16 VCC 15 DI4 14 DO4A RL = 27Ω 1 S1 4 EN 4 13 D GENERATOR (NOTE 1) DO4B OUT 50Ω CL = 15PF (NOTE 2) VCC DO2B 5 DO2A 6 12 EN 11 DO3B 10 DO3A 9 DI3 VOM = VOH + VOL 2 1.5V 2 DI2 7 3 GND Figure 2. Driver Propagation Delay Test Circuit 8 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. SP3486 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 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 SP3486 Truth Table (1). S1 D Pin 5 — DO2B — Driver 2 output B. OUT RL = 110Ω CL = 50pF (NOTE 2) Pin 6 — DO2A — Driver 2 output A. GENERATOR (NOTE 1) 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. 50Ω VOM = VOH + VOL 2 1.5V Figure 3. Driver Enable and Disable Timing Circuit, Output HIGH VCC R RL = 110Ω S1 D 0V OR 3V VOD R VCC OUT CL = 50pF (NOTE 2) VOC GENERATOR (NOTE 1) Figure 1. Driver DC Test Load Circuit 10/15/02 D 50Ω Figure 4. Driver Enable and Disable Timing Circuit, Output LOW SP3486/3487 Low Power Quad RS485/422 Line Drivers 3 © Copyright 2002 Sipex Corporation PINOUT — SP3487 INPUT ENABLES OUTPUTS 16 VCC DI EN EN OUTA OUTB 15 DI4 H H X H L 3 14 DO4A L H X L H EN1/EN2 4 13 DO4B H X L H L DO2B 5 12 EN3/EN4 L X L L H DO2A 6 11 DO3B X L H Hi–Z Hi–Z DI2 7 10 DO3A Table 1. SP3486 Truth Table 9 DI3 Pin 8 — GND — Digital Ground. DI1 1 DO1A 2 DO1B SP3487 1 4 2 3 GND 8 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 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 4 output enabled forces driver DO4A high and DO4B low. Pin 10 — DO3A — Driver 3 output A. Pin 11 — DO3B — Driver 3 output B. Pin 12 — EN3/EN4 — Driver 3 and 4 Output Enable. Please refer to SP3487 Truth Table (2). Pin 16—VCC—Positive Supply +3.00V<VCC <+3.60V Pin 13 — DO4B — Driver 4 output B. Pin 14 — DO4A — Driver 4 output A. SP3487 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 4 output enabled forces driver DO4A high and DO4B low. Pin 2 — DO1A — Driver 1 output A. Pin 16 —VCC —Positive Supply +3.00V < VCC < +3.60V Pin 3 — DO1B — Driver 1 output B. Pin 4 — EN1/EN2 — Driver 1 and 2 Output Enable. Please refer to SP3487 Truth Table (2). Pin 5 — DO2B — Driver 2 output B. INPUT 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. 10/15/02 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. SP3487 Truth Table SP3486/3487 Low Power Quad RS485/422 Line Drivers 4 © Copyright 2000 Sipex Corporation FEATURES Driver The SP3486 and the SP3487 are +3.3V low power quad line drivers that meet the specifications of the RS-485 and RS-422 serial protocols. These devices are pin-to-pin compatible with Sipex's SP486 and SP487 devices as well as popular industry standards. The SP3486 and SP3487 devices feature Sipex's BiCMOS process allowing low power operation without sacrificing performance. The drivers for both the SP3486 and SP3487 have differential outputs. The typical voltage output swing with no load will be 0V to +5V. With worst case loading of 54Ω across the differential outputs, the driver can maintain greater than +1.5V voltage levels. The drivers of the SP3486 feature active HIGH and active LOW common driver enable controls. Refer to SP3486 Truth Table in Table 1. The SP3487 provides independent, active high driver enable controls for each pair of drivers. Refer to SP3487 Truth Table in Table 2. The driver outputs are short-circuit limited to 250mA. The SP3486 and SP3487 drivers meet the electrical specifications of RS-485 and RS-422 serial protocols up to 10Mbps under load. The RS-485 standard is ideal for multi-drop applications or for long distance interfaces. RS-485 allows up to 32 drivers and 32 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-485 transceivers are equipped with a wide (-7V to +12V) common mode range to accomodate ground potential differences. Data is virtually immune to noise in the transmission line because the RS-485 protocol is a differential interface. AC PARAMETERS VCC = +3.3V±5%; typicals at 25°C; TAMB = 25°C unless otherwise noted. PARAMETER PROPAGATION DELAY Driver Input to Output MIN. TYP. MAX. UNIT 20 20 40 40 5 60 60 10 ns ns ns CONDITIONS Figure 2 and 5 Low to High (tPLH) High to Low (tPHL) Differential Driver Skew Driver Rise Time (tR) SP3486 SP3487 Driver Fall Time (tF) SP3486 SP3487 DRIVER ENABLE To Output High | tPHL(Y) - tPLH(Y) |, | tPHL(Z) - tPLH(Z) | , Figures 2 and 5 10% to 90% RDIFF = 60Ω 10 10 ns ns 10 10 ns ns 110 ns Figures 3 and 6 To Output Low 110 ns Figures 4 and 6 DRIVER DISABLE From Output Low 110 ns Figures 4 and 6 From Output High 110 ns Figures 3 and 6 10/15/02 90% to 10% RDIFF = 60Ω SP3486/3487 Low Power Quad RS485/422 Line Drivers 5 © Copyright 2002 Sipex Corporation 3V 1.5V 1.5V INPUT 0V tPLH VOH tPHL VOM VOM Y OUTPUT VOL tPHL tPLH VOH Z OUTPUT VOM VOM VOL VOM = VOH + VOL ≈ 1.5V 2 Figure 5. Driver Propagation Delay Waveforms 3V 1.5V 1.5V INPUT 0V VOH OUTPUT HIGH tPHZ tPZH 0.25V VOM 0V VCC tPZL OUTPUT LOW tPLZ VOM VOL 0.25V VOM = VOH + VOL ≈ 1.5V 2 Figure 6. Driver Enable and Disable Timing Waveforms NOTE 1: The input pulse is supplied by a generator with the following characteristics: INPUT=250kHz, 50% duty cycle, tr < 6.0ns, Zo=50Ω. NOTE 2: CL includes probe and stray capacitance. 10/15/02 SP3486/3487 Low Power Quad RS485/422 Line Drivers 6 © Copyright 2000 Sipex Corporation PACKAGE: PLASTIC DUAL–IN–LINE (NARROW) E1 E D1 = 0.005" min. (0.127 min.) A1 = 0.015" min. (0.381min.) D A = 0.210" max. (5.334 max). C A2 B1 B e = 0.100 BSC (2.540 BSC) Ø L eA = 0.300 BSC (7.620 BSC) ALTERNATE END PINS (BOTH ENDS) DIMENSIONS (Inches) Minimum/Maximum (mm) 10/15/02 16–PIN A2 0.115/0.195 (2.921/4.953) B 0.014/0.022 (0.356/0.559) B1 0.045/0.070 (1.143/1.778) C 0.008/0.014 (0.203/0.356) D 0.780/0.800 (19.812/20.320) E 0.300/0.325 (7.620/8.255) E1 0.240/0.280 (6.096/7.112) L 0.115/0.150 (2.921/3.810) Ø 0°/ 15° (0°/15°) SP3486/3487 Low Power Quad RS485/422 Line Drivers 7 © Copyright 2002 Sipex Corporation PACKAGE: PLASTIC SMALL OUTLINE (SOIC) (WIDE) E H D A Ø e B DIMENSIONS (Inches) Minimum/Maximum (mm) 10/15/02 A1 L 16–PIN A 0.093/0.104 (2.352/2.649) A1 0.004/0.012 (0.102/0.300) B 0.013/0.020 (0.330/0.508) D 0.398/0.413 (10.10/10.49) E 0.291/0.299 (7.402/7.600) e 0.050 BSC (1.270 BSC) H 0.394/0.419 (10.00/10.64) L 0.016/0.050 (0.406/1.270) Ø 0°/8° (0°/8°) SP3486/3487 Low Power Quad RS485/422 Line Drivers 8 © Copyright 2000 Sipex Corporation ORDERING INFORMATION Quad RS485 Drivers: Model ..................................................... Enable/Disable .......................................... Temperature Range ......................................... Package SP3486CP .......................... Common; active Low and Active High ............................. 0°C to +70°C ..................................... 16–pin Plastic DIP SP3486CT ........................... Common; active Low and Active High ............................. 0°C to +70°C .............................................. 16–pin SOIC SP3486EP ........................... Common; active Low and Active High ........................... –40°C to +85°C .................................. 16–pin Plastic DIP SP3486ET ........................... Common; active Low and Active High ........................... –40°C to +85°C ........................................... 16–pin SOIC SP3487CP ............................... One per driver pair; active High ................................... 0°C to +70°C ..................................... 16–pin Plastic DIP SP3487CT ................................ One per driver pair; active High ................................... 0°C to +70°C .............................................. 16–pin SOIC SP3487EP ................................ One per driver pair; active High ................................ –40°C to +85°C .................................. 16–pin Plastic DIP SP3487ET ................................ One per driver pair; active High ................................ –40°C to +85°C ........................................... 16–pin SOIC Please consult the factory for pricing and availability on a Tape-On-Reel option. Corporation SIGNAL PROCESSING 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 hereing; neither does it convey any license under its patent rights nor the rights of others. 10/15/02 SP3486/3487 Low Power Quad RS485/422 Line Drivers 9 © Copyright 2002 Sipex Corporation