SP490E/491E Enhanced Full Duplex RS-485 Transceivers FEATURES * +5V Only * Low Power BiCMOS * Driver/Receiver Enable (SP491E) * RS-485 and RS-422 Drivers/Receivers * Pin Compatible with LTC490 and SN75179 (SP490E) * Pin Compatible with LTC491 and SN75180 (SP491E) * Improved ESD Specifications: 15kV Human Body Model 15kV IEC61000-4-2 Air Discharge Now Available in Lead Free Packaging 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. BLOCK DIAGRAMS SP490E SP491E Exar Corporation 48720 Kato Road, Fremont CA, 94538 * (510)668-7017 * www.exar.com SP490E,491E_101_052413 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 Drivers................................................-0.5V to (VCC+0.5V) Receivers..................................................................14V Output Voltages Drivers......................................................................14V Receivers...........................................-0.5V to (VCC+0.5V) Storage Temperature....................................................-65C to +150 Power Dissipation.....................................................................1000mW ELECTRICAL CHARACTERISTICS TMIN to TMAX and VCC = 5V 5% unless otherwise noted. PARAMETERS MIN. TYP. MAX. UNITS CONDITIONS SP490E DRIVER DC Characteristics Differential Output Voltage GND VCC Volts Unloaded; R = ; see figure 1 Differential Output Voltage 2 VCC Volts With Load; R = 50; (RS422); see figure 1 Differential Output Voltage1.5 VCC Volts With Load; R = 27; (RS485); see figure 1 Change in Magnitude of Driver Differential Output Voltage for Complimentary States 0.2 Volts R = 27 or R = 50; see figure 1 Driver Common-Mode Output Voltage 3 Volts R = 27 or R = 50; see figure 1 Input High Voltage 2.0 Volts Applies to D Input Low Voltage 0.8 Volts Applies to D Input Current 10 A Applies to D Driver Short-Circuit Current VOUT = HIGH 250 mA7V VO +12V VOUT = LOW 250 mA7V VO +12V SP490E DRIVER AC Characteristics Maximum Data Rate10 Mbps Driver Input to Output 30 60 ns Driver Input to Output 30 60 ns Driver Skew 5 ns Driver Rise or Fall Time15 40 ns tPLH; RDIFF = 54, CL1 = CL2 = 100pF; see figures 3 and 5 tPHL; RDIFF = 54, CL1 = CL2 = 100pF; see figures 3 and 5 see figures 3 and 5, tSKEW = | tDPLH - tDPHL | From 10% to 90%; RDIFF = 54, CL1 = CL2 = 100pF; see figures 3 and 5 SP490E RECEIVER DC Characteristics Differential Input Threshold -0.2 +0.2 Input Hysteresis 70 Output Voltage High 3.5 Output Voltage Low 0.4 Input Resistance 12 15 Input Current (A, B); VIN = 12V 1.0 Input Current (A, B); VIN = -7V -0.8 Short-Circuit Current 85 Volts7V VCM 12V mV VCM = 0V Volts IO = 4mA, VID = +200mV Volts IO = +4mA, VID = 200mV k7V VCM 12V mA VIN = 12V mA VIN = -7V mA 0V VO VCC Exar Corporation 48720 Kato Road, Fremont CA, 94538 * (510)668-7017 * www.exar.com SP490E,491E_101_052413 ELECTRICAL CHARACTERISTICS TMIN to TMAX and VCC = 5V 5% unless otherwise noted. PARAMETERS SP490E RECEIVER MIN. TYP. MAX. UNITS AC Characteristics Maximum Data Rate10 Mbps Receiver Input to Output 20 45100 ns Receiver Input to Output 20 45100 ns Diff. Receiver Skew ItPLH-tPHLI13 ns POWER REQUIREMENTS Supply Voltage +4.75 +5.25 Supply Current 900 ENVIRONMENTAL AND MECHANICAL Operating Temperature Commercial (_C_) Industrial (_E_) Storage Temperature Package Plastic DIP (_P) NSOIC (_N) 0 -40 -65 +70 +85 +150 CONDITIONS tPLH; RDIFF = 54, CL1 = CL2 = 100pF; Figures 3 & 7 tPHL; RDIFF = 54, CL1 = CL2 = 100pF; Figures 3 & 7 RDIFF = 54; CL1 = CL2 = 100pF; Figures 3 & 7 Volts A C C C Figure 1. Driver DC Test Load Circuit Figure 2. Receiver Timing Test Load Circuit Figure 3. Driver/Receiver Timing Test Circuit Figure 4. Driver Timing Test Load #2 Circuit Exar Corporation 48720 Kato Road, Fremont CA, 94538 * (510)668-7017 * www.exar.com SP490E,491E_101_052413 Figure 5. Driver Propagation Delays Figure 6. Driver Enable and Disable Times Figure 7. Receiver Propagation Delays Exar Corporation 48720 Kato Road, Fremont CA, 94538 * (510)668-7017 * www.exar.com SP490E,491E_101_052413 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) Receivers................................................................14V Output Voltages Logic................................................-0.5V to (VCC+0.5V) Drivers....................................................................14V Receivers.........................................-0.5V to (VCC+0.5V) Storage Temperature.....................................................-65C to +150 Power Dissipation.................................................................1000mW ELECTRICAL CHARACTERISTICS TMIN to TMAX and VCC = 5V 5% unless otherwise noted. PARAMETERS SP491E DRIVER MIN. TYP. MAX. UNITS CONDITIONS DC Characteristics Differential Output Voltage GND VCC Volts Unloaded; R = ; see figure 1 Differential Output Voltage 2 VCC Volts With Load; R = 50; (RS422); see figure 1 Differential Output Voltage1.5 VCC Volts With Load; R = 27; (RS485); see figure Change in Magnitude of Driver Differential Output Voltage for Complimentary States 0.2 Volts R = 27 or R = 50; see figure 1 Driver Common-Mode Output Voltage 3 Volts R = 27 or R = 50; see figure 1 Input High Voltage 2.0 Volts Applies to D, RE, DE Input Low Voltage 0.8 Volts Applies to D, RE, DE Input Current 10 A Applies to D, RE, DE Driver Short-Circuit Current VOUT = HIGH 250 mA7V VO 12V VOUT = LOW 250 mA7V VO 12V SP491E DRIVER AC Characteristics Maximum Data Rate10 Mbps Driver Input to Output 30 60 ns Driver Input to Output 30 60 ns Driver Skew 510 ns Driver Rise or Fall Time15 40 ns Driver Enable to Output High 40 70 ns Driver Enable to Output Low 40 70 ns Driver Disable Time from Low 40 70 ns Driver Disable Time from High 40 70 ns RE = 5V, DE = 5V tPLH; RDIFF = 54, CL1 = CL2 = 100pF; see figures 3 and 5 tPHL; RDIFF = 54, CL1 = CL2 = 100pF; see figures 3 and 5 see figures 3 and 5, tSKEW = | tDPLH - tDPHL | From 10% to 90%; RDIFF = 54, CL1 = CL2 = 100pF; see figures 3 and 5 CL1 = CL2 = 100pF; see figures 4 and 6; S2 closed CL1 = CL2 = 100pF; see figures 4 and 6; S1 closed CL1 = CL2 = 100pF; see figures 4 and 6; S1 closed CL1 = CL2 = 100pF; see figures 4 and 6; S2 closed Exar Corporation 48720 Kato Road, Fremont CA, 94538 * (510)668-7017 * www.exar.com SP490E,491E_101_052413 ELECTRICAL CHARACTERISTICS TMIN to TMAX and VCC = 5V 5% unless otherwise noted. PARAMETERS MIN. TYP. MAX. SP491E RECEIVER DC Characteristics Differential Input Threshold -0.2 +0.2 Input Hysteresis 70 Output Voltage High 3.5 Output Voltage Low 0.4 Three State (high impedance) Output Current 1 Input Resistance 12 15 Input Current (A, B); VIN = 12V 1.0 Input Current (A, B); VIN = -7V -0.8 Short-Circuit Current 85 UNITS Volts7V VCM 12V mV VCM = 0V Volts IO = 4mA, VID = +200mV Volts IO = +4mA, VID = 200mV A 0.4V VO 2.4V; RE = 5V k7V VCM 12V mA DE = 0V, VCC = 0V or 5.25V, VIN = 12V mA DE = 0V, VCC = 0V or 5.25V, VIN = -7V mA 0V VO VCC SP491E RECEIVER AC Characteristics Maximum Data Rate10 Mbps Receiver Input to Output 20 45100 ns Receiver Input to Output 20 45100 ns Diff. Receiver Skew ItPLH-tPHLI13 ns Receiver Enable to Output Low 45 70 ns Receiver Enable to Output High 45 70 ns Receiver Disable from Low 45 70 ns Receiver Disable from High 45 70 ns POWER REQUIREMENTS Supply Voltage +4.75 +5.25 Supply Current 900 SP491E ENVIRONMENTAL AND MECHANICAL Operating Temperature Commercial (_C_) 0 +70 Industrial (_E_) -40 +85 Storage Temperature -65 +150 Package Plastic DIP (_P) NSOIC (_N) CONDITIONS Volts A RE = 0V tPLH; RDIFF = 54, CL1 = CL2 = 100pF; Figures 3 & 7 tPHL; RDIFF = 54, CL1 = CL2 = 100pF; Figures 3 & 7 RDIFF = 54; CL1 = CL2 = 100pF; Figures 3 & 7 CRL = 15pF; Figures 2 and 8; S1 closed CRL = 15pF; Figures 2 and 8; S2 closed CRL = 15pF; Figures 2 and 8; S1 closed CRL = 15pF; Figures 2 and 8; S2 closed RE, D = 0V or VCC; DE = VCC C C C Figure 8. Receiver Enable and Disable Times Exar Corporation 48720 Kato Road, Fremont CA, 94538 * (510)668-7017 * www.exar.com SP490E,491E_101_052413 DESCRIPTION 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 differential 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. The SP490E and SP491E are f u l l - d u p l e x d i ff e r e n t i a l t r a n s c e i v ers that meet the requirements of RS-485 and RS-422. Fabricated with a Exar proprietary BiCMOS process, both products require a fraction of the power of older bipolar designs. Receiver... 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. 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 15k (12k 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. Driver... 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. 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 54 across the differential outputs, the driver can maintain greater than 1.5V voltage levels. Exar Corporation 48720 Kato Road, Fremont CA, 94538 * (510)668-7017 * www.exar.com SP490E,491E_101_052413 Package: 8 Pin nSOIC Exar Corporation 48720 Kato Road, Fremont CA, 94538 * (510)668-7017 * www.exar.com SP490E,491E_101_052413 Package: 14 Pin nSOIC Exar Corporation 48720 Kato Road, Fremont CA, 94538 * (510)668-7017 * www.exar.com SP490E,491E_101_052413 Package: 8 Pin PDIP Exar Corporation 48720 Kato Road, Fremont CA, 94538 * (510)668-7017 * www.exar.com 10 SP490E,491E_101_052413 Package: 14 Pin PDIP Exar Corporation 48720 Kato Road, Fremont CA, 94538 * (510)668-7017 * www.exar.com 11 SP490E,491E_101_052413 ordering information Model Temperature Range Package SP490ECN-L................................................................................... 0C to +70C................................................................................ 8-Pin NSOIC SP490ECN-L/TR............................................................................. 0C to +70C................................................................................ 8-Pin NSOIC SP490ECP-L................................................................................... 0C to +70C..................................................................................8-Pin PDIP SP490EEN-L................................................................................. -40C to +85C............................................................................... 8-Pin NSOIC SP490EEN-L/TR........................................................................... -40C to +85C............................................................................... 8-Pin NSOIC SP490EEP-L................................................................................. -40C to +85C................................................................................. 8-Pin PDIP SP491ECN-L................................................................................... 0C to +70C............................................................................... 14-Pin NSOIC SP491ECN-L/TR............................................................................. 0C to +70C............................................................................... 14-Pin NSOIC SP491ECP-L................................................................................... 0C to +70C.................................................................................14-Pin PDIP SP491EEN-L................................................................................. -40C to +85C.............................................................................. 14-Pin NSOIC SP491EEN-L/TR........................................................................... -40C to +85C.............................................................................. 14-Pin NSOIC SP491EEP-L................................................................................. -40C to +85C................................................................................ 14-Pin PDIP Note: /TR = Tape and Reel REVISION HISTORY Date Revision 2000 14 Description Sipex Legacy Data Sheet May 2011 1.0.0 Convert to Exar format. Remove driver propagation delay minimum and driver rise/fall time minimum entry for SP490E and SP491E. Update ESD rating to IEC61000-4-2. Update ordering information. May 2013 1.0.1 Correct type errors per PCN 13-0503-01 ECN: 1322-03 05/29/13 Notice EXAR Corporation reserves the right to make changes to any products contained in this publication in order to improve design, performance or reliability. EXAR Corporation assumes no representation that the circuits are free of patent infringement. Charts and schedules contained herein are only for illustration purposes and may vary depending upon a user's specific application. While the information in this publication has been carefully checked; no responsibility, however, is assumed for inaccuracies. EXAR Corporation does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reasonably be expected to cause failure of the life support system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications unless EXAR Corporation receives, in writting, assurances to its satisfaction that: (a) the risk of injury or damage has been minimized ; (b) the user assumes all such risks; (c) potential liability of EXAR Corporation is adequately protected under the circumstances. Copyright 2013 EXAR Corporation Datasheet May 2013 Send your serial transceiver technical inquiry with technical details to: serialtechsupport@exar.com Reproduction, in part or whole, without the prior written consent of EXAR Corporation is prohibited. Exar Corporation 48720 Kato Road, Fremont CA, 94538 * (510)668-7017 * www.exar.com 12 SP490E,491E_101_052413