SP487ET-L

SP486/SP487 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 RS422 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 a wide common-mode output range. SP486 and SP487 are available in a 16-pin SOIC package. SP487 is available, SP486 is obsolete SP486_487_101_013020 1 ABSOLUTE MAXIMUM RATINGS These are stress ratings only and functional operation of the device at these ratings or any other above those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/ºC above +70ºC) Small Outline..................................................375mW (derate 7mW/ºC above +70ºC) VCC = +5.0V +/-5%; typicals at 25°C; TMIN ≤ TAMB ≤ TMAX unless otherwise noted. PARAMETERS MIN. TYP. ELECTRICAL CHARACTERISTICS MAX. UNITS 0.8 Volts CONDITIONS DC CHARACTERISTICS DIGITAL INPUTS DI, EN, EN, EN1/EN2, EN3/EN4 Voltage VIL Voltage VIH 2.0 Volts Input Current +/-2 µA VIN = 0V to VCC 5 Volts IO = 0; unloaded DRIVER OUTPUTS Differential Voltage Differential Voltage 2 Differential Voltage 1.5 Change in Output Magnitude for Complementary Output state Common Mode Output Voltage Volts RL = 50Ω (RS-422); Figure 1 5 Volts RL = 27Ω (RS-485); Figure 1 0.2 Volts RL = 27Ω or 50Ω; Figure 1 2 2.3 Change in Common Mode Output Magnitude for Complementary Output state Driver Short Circuit Current VOH Driver Short Circuit Current VOL High Impedance Output Current +/-2 3 Volts RL = 27Ω or 50Ω; Figure 1 0.2 Volts RL = 27Ω or 50Ω; Figure 1 +/-250 mA -7V ≤ VO ≤ +10V +/-250 mA -7V ≤ VO ≤ +10V +/-200 µA VO = -7V to +10V POWER REQUIREMENTS Supply Voltage 5.25 Volts Supply Current 4.75 0.5 10 µA No load, output enabled Supply Current 0.1 10 µA No load, output disabled SP486_487_101_013020 2 ELECTRICAL CHARACTERISTICS VCC = +5.0V +/-5%; typicals at 25°C; TMIN ≤ TAMB ≤ TMAX unless otherwise noted. PARAMETERS MIN. TYP. MAX. UNITS +70 °C CONDITIONS ENVIRONMENTAL AND MECHANICAL Operating Temperature, _C 0 Operating Temperature, _E -40 +85 °C Storage Temperature -65 +150 °C Package -_T 16-pin SOIC AC CHARACTERISTICS Maximum Data Rate 10 Mbps Propagation Delay, tPLH 20 40 60 ns RDIFF = 54 ohms, CL1= CL2 = 100pF; Figure 2 Propagation Delay, tPHL 20 40 60 ns RDIFF = 54 ohms, CL1= CL2 = 100pF; Figure 2 Differential Driver Skew 5 15 ns RDIFF = 54 ohms, CL1= CL2 = 100pF; Figure 2 Driver Rise Time (tR) 20 ns 10% to 90% Driver Fall Time (tF) 20 ns 90% to 10% Driver Enable to output High 60 110 ns CL = 100pF, Figures 3 and 5 (S2 closed) Driver Enable to output Low 60 115 ns CL = 100pF, Figures 3 and 5 (S1 closed) Driver Disable from output High 60 130 ns CL = 15pF, Figures 3 and 5 (S2 closed) Driver Disable from output Low 60 130 ns CL = 15pF, Figures 3 and 5 (S1 closed) SP486_487_101_013020 3 PIN FUNCTION SP486 Pin Function SP486 Pin 1 - DI1 - Driver 1 Input - If driver 1 output is enabled, a 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, a logic 0 on DI1 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 2 - DO1A - Driver 1 output A. Pin 10 - DO3A - Driver 3 output A. Pin 3 - DO1B - Driver 1 output B. Pin 11 - DO3B - Driver 3 output B. Pin 4 - EN - Driver Output Enable; Please refer to SP486 truth table (1). Pin 12 - EN - Driver Output Disable; Please refer to SP486 truth table (1). Pin 5 - DO2B - Driver 2 output B. Pin 13 - DO4B - Driver 4 output B. Pin 6 - DO2A - Driver 2 output A. Pin 14 - DO4A - Driver 4 output A. Pin 7 - DI2 - Driver 2 Input - If driver 2 output is enabled, a 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 15 - DI4 - Driver 4 Input - If driver 4 output is enabled, a 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 8 - GND - Ground. Pin 16 - Supply Voltage - +4.75V ≤ Vcc ≤ +5.25V. SP486_487_101_013020 4 PIN FUNCTION SP487 Pin Function SP487 Pin 1 - DI1 - Driver 1 Input - If driver 1 output is enabled, a 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, a logic 0 on DI1 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 2 - DO1A - Driver 1 output A. Pin 10 - DO3A - Driver 3 output A. Pin 3 - DO1B - Driver 1 output B. Pin 11 - DO3B - Driver 3 output B. Pin 4 - EN1/EN2 - Driver 1 and 2 Output Enable; Please refer to SP487 truth table (2). Pin 12 - EN3/EN4 - Driver 3 and 4 Output Enable; Please refer to SP487 truth table (2).. Pin 5 - DO2B - Driver 2 output B. Pin 13 - DO4B - Driver 4 output B. Pin 6 - DO2A - Driver 2 output A. Pin 14 - DO4A - Driver 4 output A. Pin 7 - DI2 - Driver 2 Input - If driver 2 output is enabled, a 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 15 - DI4 - Driver 4 Input - If driver 4 output is enabled, a 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 8 - GND - Ground. Pin 16 - Supply Voltage - +4.75V ≤ Vcc ≤ +5.25V. SP486_487_101_013020 5 TEST CIRCUITS A R VOD R VOC B Figure 1. Driver DC Test Load Figure 2. Driver Timing Test S1 VCC 500 ohms OUTPUT UNDER TEST S2 CL Figure 3. Driver Timing Test Load DI f = 1MHz; t R