SP486 SIPEX | Alldatasheet
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SP486/487 Quad RS-485/RS-422 Line Drivers © Copyright 2000 Sipex Corporation 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 indepen- dent 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. n RS-485 or RS-422 Applications n Quad Differential Line Drivers n Tri–state Output Control n 40ns Typical Driver Propagation Delays n 5ns Skew n –7V to +12V Common Mode Output Range n 100µA Supply Current n Single +5V Supply Operation n Pin Compatible with SN75172, SN75174, LTC486, and LTC487 SP487DI1 DO 1A DO 1B EN 1/EN2 DO 2B DO 2A DI2 GND VCC DI4 DO 4A DO 4B EN 3/EN4 DO 3B DO 3A DI3 SP486DI1 DO 1A DO 1B EN DO 2B DO 2A DI2 GND VCC DI4 DO 4A DO 4B EN DO DO 3A DI3 SP486/487 Quad RS-485/RS-422 Line Drivers
SP486/487 Quad RS-485/RS-422 Line Drivers © 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. V Input Voltages CC +0.5V) Input Currents Power Dissipation (derate 7mW/°C above +70°C) (derate 7mW/°C above +70°C) SPECIFICATIONS VCC = 5V±5%; typicals at 25°C; TMIN ≤ TA ≤ TMAX unless otherwise noted. PARAMETER MIN. TYP. MAX. UNIT CONDITIONS DC CHARACTERISTICS Digital Inputs DI, EN, EN, EN1/EN2, EN3/EN4 Voltage VIL 0.8 Volts VIH 2.0 Volts Input Current ±2 µAV IN = 0V to VCC DRIVER OUTPUTS Differential Voltage 5 Volts I O = 0; unloaded
2 Volts R L = 50Ω (RS-422)
1.5 2 5 Volts RL = 27Ω (RS-485); Fig. 1 Change in Output Magnitude 0.2 Volts RL = 27Ω or 50Ω ; Fig. 1 for Complementary Output State Common Mode Output Voltage 2.3 3 Volts RL = 27Ω or 50Ω ; Fig. 1 Change in Common Mode Output Magnitude 0.2 Volts RL = 27Ω or 50Ω ; Fig. 1 for Complementary Output State R L = 50Ω (RS-422) R L = 27Ω (RS-485) Maximum Data Rate 10 Mbps Short–circuit Current V OH ±250 mA –7V ≤VO ≤ +10V VOL ±250 mA –7V ≤VO ≤ +10V High Impedance Output Current ±2 ±200 µAV O = –7V to +10V POWER REQUIREMENTS Supply Voltage 4.75 5.00 5.25 Volts Supply Current 0.5 10 µA No load, output enabled 0.5 10 µA No load, output disabled ENVIRONMENTAL AND MECHANICAL Operating Temperature –C 0 +70 °C –E –40 +85 °C Storage Temperature –65 +150 °C Package –_S 16–pin Plastic DIP –_T 16–pin SOIC
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. enabled forces driver DO2A high and DO2B low. Pin 8 — GND — Digital Ground. enabled forces driver DO3A high and DO3B low. Pin 10 — DO3A — Driver 3 output A. Table 1. SP486 Truth Table Table 2. SP487 Truth Table 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 13 — DO4B — Driver 4 output B. Pin 14 — DO4A — Driver 4 output A. able in 16–pin plastic DIP and SOIC packages.
Figure 4. Driver Propagation Delays VCC = 5V±5%; typicals at 25°C; 0°C ≤ TA ≤ +70°C unless otherwise noted.
SP486/487 Quad RS-485/RS-422 Line Drivers © Copyright 2000 Sipex Corporation
ORDERING INFORMATION
Quad RS485 Drivers: VOH VO Output normally low F = 1MHZ: tr < 10ns: tf < 10ns tZL tLZ EN VOL 1.5V 1.5V 2.3VA, B 0.5V tZH 2.3V 0.5V tHZ Output normally high Figure 5. Driver Enable/Disable Timing
SP486/487 Quad RS-485/RS-422 Line Drivers © Copyright 2000 Sipex Corporation Corporation SIGNAL PROCESSING EXCELLENCE 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. 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