SP491ECN

SP490E SIPEX | Alldatasheet

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SP490EDS/14 SP490E Enhanced Full Duplex RS-485 Transceivers © Copyright 2000 Sipex Corporation SP490E/SP491E Enhanced Full Duplex RS-485 Transceivers n +5V Only n Low Power BiCMOS n Driver/Receiver Enable (SP491E ) n RS-485 and RS-422 Drivers/Receivers n Pin Compatible with LTC490 and SN75179 (SP490E ) n Pin Compatible with LTC491 and SN75180 (SP491E ) n Improved ESD Specifications: ±15kV Human Body Model ±15kV IEC1000-4-2 Air Discharge ±8kV IEC1000-4-2 Contact Discharge DESCRIPTION… The SP490E is a low power differential line driver/receiver meeting RS-485 and RS-422 standards up to 10Mbps. The SP491E is identical to the SP490E with the addition of driver and receiver tri-state enable lines. Both products feature ±200mV receiver input sensitivity, over wide common mode range. The SP490E is available in 8-pin plastic DIP and 8-pin NSOIC packages for operation over the commercial and industrial temperature ranges. The SP491E is available in 14-pin DIP and 14-pin NSOIC packages for operation over the commercial and industrial temperature ranges. 7 8 Vcc GND R D A B Z Y R D 14NC REB DE GND NC NC 4 5 R D Vcc GND R D A B Z Y SP490E SP491E

SP490EDS/14 SP490E Enhanced Full Duplex RS-485 Transceivers © Copyright 2000 Sipex Corporation 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. V Input Voltages Output Voltages TMIN to TMAX and VCC = 5V ± 5% unless otherwise noted. PARAMETERS MIN. TYP. MAX. UNITS CONDITIONS SP490E DRIVER DC Characteristics Differential Output Voltage GND V CC Volts Unloaded; R = ∞ ; see Figure 1 Differential Output Voltage 2 V CC Volts With Load; R = 50Ω ; (RS-422); see Figure 1 Differential Output Voltage 1.5 V CC Volts W ith Load; R = 27Ω ; (RS-485); see Figure 1 Change in Magnitude of Driver Differential Output Voltage for Complimentary States 0.2 Volts R = 27 Ω or R = 50Ω ; see Figure 1 Driver Common-Mode Output Voltage 3 Volts R = 27 Ω or R = 50Ω ; see Figure 1 Input High Voltage 2.0 Volts Applies to D Input Low Voltage 0.8 Volts Applies to D Input Current ±10 µA Applies to D Driver Short-Circuit Current V OUT = HIGH ±250 mA -7V ≤ VO ≤ +12V VOUT = LOW ±250 mA -7V ≤ VO ≤ +12V SP490E DRIVER AC Characteristics Maximum Data Rate 10 Mbps R DIFF = 54Ω , CL1 = CL2 = 100pF Driver Input to Output 20 30 60 ns t PLH ; RDIFF = 54Ω , CL1 = CL2 = 100pF; see Figures 3 and 6 Driver Input to Output 20 30 60 ns t PHL ; RDIFF = 54Ω , CL1 = CL2 = 100pF; see Figures 3 and 5 Driver Skew 5 ns see Figures 3 and 5, tSKEW = | tDPLH - tDPHL | Driver Rise or Fall Time 3 15 40 ns From 10% to 90%; R DIFF = 54Ω , C L1 = CL2 = 100pF; see Figures 3 and 5 SP490E RECEIVER DC Characteristics Differential Input Threshold -0.2 +0.2 Volts -7V ≤ VCM ≤ 12V Input Hysteresis 70 mV V CM = 0V Output Voltage High 3.5 Volts I O = -4mA, VID = +200mV Output Voltage Low 0.4 Volts I O = +4mA, VID = -200mV Input Resistance 12 15 k Ω -7V ≤ VCM ≤ 12V Input Current (A, B); VIN = 12V ±1.0 mA V IN = 12V Input Current (A, B); VIN = -7V -0.8 mA V IN = -7V Short-Circuit Current 85 mA 0V ≤ VO ≤ VCC

SP490EDS/14 SP490E Enhanced Full Duplex RS-485 Transceivers © Copyright 2000 Sipex Corporation 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. V Input Voltages Output Voltages SPECIFICATIONS TMIN to TMAX and VCC = 5V ± 5% unless otherwise noted. PARAMETERS MIN. TYP. MAX. UNITS CONDITIONS SP491E DRIVER DC Characteristics Differential Output Voltage GND V CC Volts Unloaded; R = ∞ ; see Figure 1 Differential Output Voltage 2 V CC Volts With Load; R = 50Ω ; (RS-422); see Figure 1 Differential Output Voltage 1.5 V CC Volts With Load; R = 27Ω ; (RS-485);see Figure 1 Change in Magnitude of Driver Differential Output Voltage for Complimentary States 0.2 Volts R = 27 Ω or R = 50Ω ; see Figure 1 Driver Common-Mode Output Voltage 3 Volts R = 27 Ω or R = 50Ω ; see Figure 1 Input HIGH Voltage 2.0 Volts Applies to D, REB, DE Input LOW Voltage 0.8 Volts Applies to D, REB, DE Input Current ±10 µA Applies to D, REB, DE Driver Short-Circuit Current V OUT = HIGH 250 mA -7V ≤ VO ≤ 10V VOUT = LOW 250 mA -7V ≤ VO ≤ 10V SP491E DRIVER AC Characteristics Maximum Data Rate 10 Mbps R DIFF = 54Ω , CL1 = CL2 = 100pF Driver Input to Output 20 30 60 ns t PLH ; RDIFF = 54Ω , CL1 = CL2 = 100pF; see Figures 3 and 5 Driver Input to Output 20 30 60 ns t PHL ; RDIFF = 54Ω , CL1 = CL2 = 100pF; see Figures 3 and 5 Driver Skew 5 10 ns see Figures 3 and 5, tSKEW = | tDPLH - tDPHL | Driver Rise or Fall Time 3 15 40 ns From 10% to 90%; R DIFF = 54Ω , C L1 = CL2 = 100pF; see Figures 3 and 5 Driver Enable to Output HIGH 40 70 ns C L1 = CL2 = 100pF; see Figures 4 and 6; S2 closed Driver Enable to Output LOW 40 70 ns C L1 = CL2 = 100pF; see Figures 4 and 6; S1 closed Driver Disable Time from LOW 40 70 ns C L1 = CL2 = 15pF; see Figures 4 and 6; S1 closed Driver Disable Time from HIGH 40 70 ns C L1 = CL2 = 15pF; see Figures 4 and 6; S2 closed

TMIN to TMAX and VCC = 5V ± 5% unless otherwise noted. Figure 8. Receiver Enable and Disable Times

SP490EDS/14 SP490E Enhanced Full Duplex RS-485 Transceivers © Copyright 2000 Sipex Corporation

FEATURES

The SP490E and SP491E are full-duplex dif- ferential transceivers that meet the requirements of RS-485 and RS-422. Fabricated with a Sipex proprietary BiCMOS process, both products require a fraction of the power of older bipolar designs. THEORY OF OPERATION 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 accommodate ground potential differences. Because RS-485 is a differential interface, data is virtually immune to noise in the transmission line. Drivers The drivers for both the SP490E and SP491E have differential outputs. The typical voltage output swing with no load will be 0 volts to +5 volts. With worst case loading of 54Ω across the differential outputs, the driver can maintain greater than 1.5V voltage levels. The driver of the SP491E has a driver enable control line which is active high. A logic high on DE (pin 4) of the SP491E will enable the differ- ential driver outputs. A logic low on DE (pin 4) of the SP491E will tri-state the driver outputs. The SP490E does not have a driver enable. Receivers The receivers for both the SP490E and SP491E have differential inputs with an input sensitivity as low as ±200mV. Input impedance of the receivers is typically 15kΩ (12kΩ minimum). A wide common mode range of -7V to +12V allows for large ground potential differences between systems. The receivers for both the SP490E and SP491E are equipped with the fail-safe feature. Fail-safe guarantees that the receiver output will be in a high state when the input is left unconnected. The receiver of the SP491E has a receiver enable control line which is active low. A logic low on REB (pin 3) of the SP491E will enable the differential receiver. A logic high on REB (pin 3) of the SP491E will tri-state the receiver. ESD Tolerance The SP490E/SP491E devices incorporate ruggedized ESD cells on all driver output and receiver input pins. The ESD structure is improved over our previous family for more rugged applications and environments sensitive to electro-static discharges and associated transients. The improved ESD tolerance is at least ±15kV without damage nor latch-up. RR CC CC SS RR SS SW1SW1 SW2SW2 R C Device Under Test DC Power Source C S R S SW1 SW2 Figure 9. ESD Test Circuit for Human Body Model

system before he or she even touches the system. power supply when the first switch (SW1) is on. receives a duration of voltage. capacitor (CS) are 330Ω an 150pF, respectively. Table 1. Transceiver ESD Tolerance Levels

SP490EDS/14 SP490E Enhanced Full Duplex RS-485 Transceivers © Copyright 2000 Sipex Corporation D ALTERNATE END PINS (BOTH ENDS) D1 = 0.005" min. (0.127 min.) E PACKAGE: PLASTIC DUAL–IN–LINE (NARROW) DIMENSIONS (Inches) Minimum/Maximum (mm) A = 0.210" max. (5.334 max). C ØL A1 = 0.015" min. (0.381min.) B e = 0.100 BSC (2.540 BSC) eA = 0.300 BSC (7.620 BSC) B C D E L Ø 0.115/0.195 (2.921/4.953) 0.014/0.022 (0.356/0.559) 0.045/0.070 (1.143/1.778) 0.008/0.014 (0.203/0.356) 0.735/0.775 (18.669/19.685) 0.300/0.325 (7.620/8.255) 0.240/0.280 (6.096/7.112) 0.115/0.150 (2.921/3.810) 0°/ 15° (0°/15°) 0.115/0.195 (2.921/4.953) 0.014/0.022 (0.356/0.559) 0.045/0.070 (1.143/1.778) 0.008/0.014 (0.203/0.356) 0.355/0.400 (9.017/10.160) 0.300/0.325 (7.620/8.255) 0.240/0.280 (6.096/7.112) 0.115/0.150 (2.921/3.810) 0°/ 15° (0°/15°) 22–PIN8–PIN 14–PIN 16–PIN 0.115/0.195 (2.921/4.953) 0.014/0.022 (0.356/0.559) 0.045/0.070 (1.143/1.778) 0.008/0.014 (0.203/0.356) 1.145/1.155 (29.083/29.337) 0.300/0.325 (7.620/8.255) 0.240/0.280 (6.096/7.112) 0.115/0.150 (2.921/3.810) 0°/ 15° (0°/15°) 0.115/0.195 (2.921/4.953) 0.014/0.022 (0.356/0.559) 0.045/0.070 (1.143/1.778) 0.008/0.014 (0.203/0.356) 0.780/0.800 (19.812/20.320) 0.300/0.325 (7.620/8.255) 0.240/0.280 (6.096/7.112) 0.115/0.150 (2.921/3.810) 0°/ 15° (0°/15°) 18–PIN 0.115/0.195 (2.921/4.953) 0.014/0.022 (0.356/0.559) 0.045/0.070 (1.143/1.778) 0.008/0.014 (0.203/0.356) 0.880/0.920 (22.352/23.368) 0.300/0.325 (7.620/8.255) 0.240/0.280 (6.096/7.112) 0.115/0.150 (2.921/3.810) 0°/ 15° (0°/15°) 20–PIN 0.115/0.195 (2.921/4.953) 0.014/0.022 (0.356/0.559) 0.045/0.070 (1.143/1.778) 0.008/0.014 (0.203/0.356) 0.980/1.060 (24.892/26.924) 0.300/0.325 (7.620/8.255) 0.240/0.280 (6.096/7.112) 0.115/0.150 (2.921/3.810) 0°/ 15° (0°/15°)

SP490EDS/14 SP490E Enhanced Full Duplex RS-485 Transceivers © Copyright 2000 Sipex Corporation D EH PACKAGE: PLASTIC SMALL OUTLINE (SOIC) (NARROW) DIMENSIONS (Inches) Minimum/Maximum (mm) 8–PIN A Ø LBe h x 45° A B D E e H h L Ø 0.053/0.069 (1.346/1.748) 0.004/0.010 (0.102/0.249 0.014/0.019 (0.35/0.49) 0.189/0.197 (4.80/5.00) 0.150/0.157 (3.802/3.988)

0.050 BSC

(1.270 BSC) 0.228/0.244 (5.801/6.198) 0.010/0.020 (0.254/0.498) 0.016/0.050 (0.406/1.270) 0°/8° (0°/8°) 14–PIN 0.053/0.069 (1.346/1.748) 0.004/0.010 (0.102/0.249) 0.013/0.020 (0.330/0.508) 0.337/0.344 (8.552/8.748) 0.150/0.157 (3.802/3.988) (1.270 BSC) 0.228/0.244 (5.801/6.198) 0.010/0.020 (0.254/0.498) 0.016/0.050 (0.406/1.270) 0°/8° (0°/8°) 16–PIN 0.053/0.069 (1.346/1.748) 0.004/0.010 (0.102/0.249) 0.013/0.020 (0.330/0.508) 0.386/0.394 (9.802/10.000) 0.150/0.157 (3.802/3.988) (1.270 BSC) 0.228/0.244 (5.801/6.198) 0.010/0.020 (0.254/0.498) 0.016/0.050 (0.406/1.270) 0°/8° (0°/8°)

SP490EDS/14 SP490E Enhanced Full Duplex RS-485 Transceivers © Copyright 2000 Sipex Corporation

ORDERING INFORMATION

Model Temperature Range Package 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. Please consult the factory for pricing and availability on a Tape-On-Reel option. 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