SP3487CT

® 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 DO1A DO1B EN DO2B DO2A DI2 GND 1 SP3486 1 16 15 VCC DI4 DO4A DO4B EN DO3B DO3A DI3 DI1 DO1A DO1B EN1/EN2 DO2B DO2A DI2 GND 1 SP3487 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 10/15/02 SP3486/3487 Low Power Quad RS485/422 Line Drivers © Copyright 2002 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 ......................................................................................... +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. UNIT CONDITIONS DI, EN, EN, EN1/EN2, EN3/EN4 0.8 2.0 ±2 VCC VCC 3 0.2 Volts Volts µA Volts Volts Volts Volts Volts Mbps VIN = 0V to VCC unloaded R = 50Ω(RS-422) R = 27Ω (RS-485); Figure 1 R = 27Ω or 50Ω; Figure 1 R = 27Ω or 50Ω; Figure 1 R = 50Ω (RS-422) R = 27Ω (RS-485) -7V ≤VO ≤ +12V -7V ≤VO ≤ +12V VO = -7V to +12V, TA=25oC 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 ±250 ±250 1 3.30 3.00 0.10 3.60 mA mA µA Volts µA µA No load, output enabled No load, output disabled 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 °C °C °C 10/15/02 SP3486/3487 Low Power Quad RS485/422 Line Drivers © Copyright 2000 Sipex Corporation 2 PINOUT — SP3486 VDM DI1 DO1A DO1B EN DO2B DO2A DI2 GND 1 SP3486 1 16 15 VCC RL = 27Ω DI4 DO4A DO4B EN DO3B DO3A 2 S1 D GENERATOR (NOTE 1) 50Ω VCC OUT CL = 15PF (NOTE 2) 4 3 4 5 6 14 13 12 11 VOM = VOH + VOL 2 1.5V 2 7 10 3 8 9 DI3 Figure 2. Driver Propagation Delay Test Circuit 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. Pin 11 — DO3B — Driver 3 output B. Pin 12 — EN — Driver Output Disable. Please refer to SP486 Truth Table (1). S1 D CL = 50pF (NOTE 2) GENERATOR (NOTE 1) 50Ω OUT RL = 110Ω 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 2 — DO1A — Driver 1 output A. Pin 3 — DO1B — Driver 1 output B. Pin 4 — EN — Driver Output Enable. Please refer to SP3486 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. VOM = VOH + VOL 2 1.5V Figure 3. Driver Enable and Disable Timing Circuit, Output HIGH VCC R S1 RL = 110Ω OUT D VCC VOD R VOC 0V OR 3V D CL = 50pF (NOTE 2) GENERATOR (NOTE 1) 50Ω Figure 1. Driver DC Test Load Circuit Figure 4. Driver Enable and Disable Timing Circuit, Output LOW SP3486/3487 Low Power Quad RS485/422 Line Drivers © Copyright 2002 Sipex Corporation 10/15/02 3 PINOUT — SP3487 INPUT DI1 DO1A DO1B EN1/EN2 DO2B DO2A DI2 GND 1 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 SP3487 1 16 15 VCC DI4 DO4A DO4B EN3/EN4 DO3B DO3A DI3 DI H L H L X 2 4 3 4 5 6 14 13 12 11 2 7 10 3 8 9 Table 1. SP3486 Truth Table 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. 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 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 16 —VCC —Positive Supply +3.00V < VCC < +3.60V 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 16—VCC—Positive Supply +3.00V