SP1491ECN-L

SP1490E/SP1491E Full Duplex RS-485 Transceivers features ■ +5V Only VCC 1 ■ Low Power BiCMOS ■ Driver/Receiver Enable (SP1491E) RO 2 ■ RS-485 and RS-422 Drivers/Receivers DI 3 ■ Pin Compatible with SN75179 (SP1490E) 7 B 88 Pin Pin -nSOIC nSOIC ■ Improved ESD Specifications ±15kV Human Body Model 6 Z 5 Y GND 4 ■ Pin Compatible with SN75180 (SP1491E) 8 A SP1490E APPLICATIONS ■ Industial Networks ■ Telecom ±15kV IEC61000-4-2 Air Discharge ■ Motor Control ■ HVAC/ Building Control description The SP1490E is a low power differential line driver/receiver meeting RS-485 and RS-422 standards up to 20Mbps. The SP1491E is identical to the SP1490E with the addition of driver and receiver tristate enable lines. Both products feature ±200mV receiver input sensitivity, over wide common mode range. The SP1490E is available in an 8-pin NSOIC packages for operation over the commercial and industrial temperature ranges. The SP1491E is available in a 14-pin NSOIC packages for operation over the commercial and industrial temperature ranges. BLOCK DIAGRAM 14 Vcc 13 NC 12 A NC 1 Vcc 1 8 A RO 2 R RO 2 7 B D GND 4 11 B RE B 3 6 Z DI 3 R DE 4 10 Z 5 Y DI 5 D 9 Y GND 6 GND 7 SP1490E Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com  8 NC SP1491E SP1490_SP1491E_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....................................................-65˚C to +150˚ Power Dissipation.....................................................................1000mW ELECTRICAL CHARACTERISTICS TMIN to TMAX and VCC = 5V ± 5% unless otherwise noted. PARAMETERS SP1490E/1491E driver DC Characteristics Differential Output Voltage Differential Output Voltage Differential Output Voltage figure 1 Change in Magnitude of Driver Differential Output Voltage for Complimentary States Driver Common-Mode Output Voltage Input High Voltage Input Low Voltage Input Current Driver Short-Circuit Current VOUT = HIGH VOUT = LOW MIN. TYP. 3.5 2 1.5 2.0 MAX. UNITS CONDITIONS VCC VCC VCC Volts Volts Volts Unloaded; R = ∞ ; see figure 1 With Load; R = 50Ω; (RS422); see figure 1 With Load; R = 27Ω; (RS485); see 0.2 Volts R = 27Ω or R = 50Ω; see figure 1 3 0.8 ±10 ±250 ±250 Volts Volts Volts μA mA mA R = 27Ω or R = 50Ω; see figure 1 Applies to D Applies to D Applies to D ‑7V ≤ VO ≤ +12V ‑7V ≤ VO ≤ +12V SP1490E/1491E driver AC Characteristics Maximum Data Rate 20 Mbps Driver Input to Output 30 40 ns Driver Input to Output 30 40 ns Driver Skew 5 ns Driver Rise or Fall Time 8 20 ns tR/F; RDIFF = 54Ω, CL1 = CL2 = 100pF; see figures 3 and 6 tR/F; RDIFF = 54Ω, CL1 = CL2 = 100pF; see figures 3 and 6 see figures 3 and 6, tR/F = | tPLH - tPHL | From 10% to 90%; RDIFF = 54Ω, SP1491E only Driver Enable to Output High 20 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 CL1 = CL2 = 100pF; see figures 3 and 6 tR/F CL1 = CL2 = 100pF; see figures 4 and 7; S2 closed CL1 = CL2 = 100pF; see figures 4 and 7; S1 closed CL1 = CL2 = 100pF; see figures 4 and 7; S1 closed CL1 = CL2 = 100pF; see figures 4 and 7; S2 closed Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com  SP1490_SP1491E_101_052413 SPECIFICATIONS (continued) TMIN to TMAX and VCC = 5V ± 5% unless otherwise noted. SP1490E/1491E RECEIVER DC Characteristics Differential Input Threshold 0.2 Input Hysteresis Output Voltage High 3.5 Output Voltage Low Input Resistance 12 Input Current (A, B); VIN = 12V Input Current (A, B); VIN = -7V Short-Circuit Current 70 15 +0.2 0.4 ±1.0 -0.8 85 Volts mV Volts Volts kΩ mA mA mA PARAMETERS MIN. TYP. MAX. UNITS SP1490E/1491E RECEIver AC Characteristics Maximum Data Rate 20 Mbps Receiver Input to Output 20 45 50 ns Receiver Input to Output 20 45 50 ns Diff. Receiver Skew ItPLH-tPHLI 5 10 ns Receiver Tplh/Tphl 40 70 ns POWER REQUIREMENTS Supply Voltage +4.75 +5.25 Volts Supply Current 900 μA environmental and mechanical Operating Temperature Commercial (_C_) 0 +70 °C Industrial (_E_) -40 +85 °C Storage Temperature -65 +150 °C ‑7V ≤ VCM ≤ 12V VCM = 0V IO = ‑4mA, VID = +200mV IO = +4mA, VID = ‑200mV ‑7V ≤ VCM ≤ 12V (1 unit load) VIN = 12V VIN = -7V 0V ≤ VO ≤ VCC CONDITIONS tPLH; RDIFF = 54Ω, CL1 = CL2 = 100pF; Figures 3 & 8 tPHL; RDIFF = 54Ω, CL1 = CL2 = 100pF; Figures 3 & 8 RDIFF = 54Ω; CL1 = CL2 = 100pF; A VOD VCC S1 CRL R 1K Test Point Receiver Output R 1K VOC S2 B Figure 2. Receiver Timing Test Load Circuit Figure 1. Driver DC Test Load Circuit 3V DE DI CL1 A B A RDIFF CL2 B Output Under Test RO 15pF 500 S1 VCC CL S2 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  SP1490_SP1491E_101_052413 f = 1MHz; tR < 10ns; tF < 10ns +3V DI DRIVER OUTPUT 1.5V 0V B 1.5V tPLH tPHL tPLH VO 1/2VO 1/2VO A DIFFERENTIAL VO+ OUTPUT 0V VA – VB VO– tSKEW tSKEW tR tF Figure 6. Driver Propagation Delays f = 1MHz; tR < 10ns; tF < 10ns +3V DE A, B 1.5V 0V 1.5V tZL 5V 2.3V VOL VOH A, B 2.3V 0V tLZ Output normally LOW 0.5V Output normally HIGH 0.5V tZH tHZ Figure 7. Driver Enable and Disable Times SP1491E only A–B R f = 1MHz; tR 10ns; tF 10ns V0D2+ 0V V0D2– VOH VOL 0V INPUT 1.5V 1.5V OUTPUT tPHL tPHL Figure 8. Receiver Propagation Delays Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com  SP1490_SP1491E_101_052413 DETAILED DESCRIPTION The SP1490E and SP1491E are full-duplex differential transceivers 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. A logic low on DE (pin 4) of the SP1491E will tri-state the driver outputs. The SP1490E does not have a driver enable. Receiver... The receivers for both the SP1490E and SP1491E 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 SP1490E and SP1491E 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 and floating. 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 receiver of the SP1491E has a receiver enable control line which is active low. A logic low on REB (pin 3) of the SP1491E will enable the differential receiver. A logic high on REB (pin 3) of the SP1491E will tri-state the receiver. Driver... The drivers for both the SP1490E and SP1491E 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 SP1491E has a driver enable control line which is active high. A logic high on DE (pin 4) of the SP1491E will enable the differential driver outputs. INPUTS INPUTS RE SP1491E only OUTPUTS DE SP1491E only DI Y Z 1 1 0 1 0 x 1 0 z 0 1 z 0 0 0 1 OUTPUTS A-B R +0.2V -0.2V open x 1 0 1 z Recieve Function Truth Table Transmit Function Truth Table Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com  SP1490_SP1491E_101_052413 Package: 8 Pin nSOIC Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com  SP1490_SP1491E_101_052413 Package: 14 Pin nSOIC Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com  SP1490_SP1491E_101_052413 ORDERING INFORMATION Part Number TopMark Temperature Range Package SP1490ECN-L.................................................. 1490ECNYYWW...................................0˚C to +70˚C................................................. 8-Pin NSOIC SP1490ECN-L/TR............................................ 1490ECNYYWW...................................0˚C to +70˚C................................................. 8-Pin NSOIC SP1490EEN-L................................................ SP1490EENYYWW...............................-40˚C to +85˚C............................................... 8-Pin NSOIC SP1490EEN-L/TR.......................................... SP1490EENYYWW...............................-40˚C to +85˚C............................................... 8-Pin NSOIC SP1491ECN-L..................................................SP1491ECNYYWW...............................0˚C to +70˚C................................................ 14-Pin NSOIC SP1491ECN-L/TR............................................SP1491ECNYYWW...............................0˚C to +70˚C................................................ 14-Pin NSOIC SP1491EEN-L................................................ SP1491EENYYWW...............................-40˚C to +85˚C.............................................. 14-Pin NSOIC SP1491EEN-L/TR.......................................... SP1491EENYYWW...............................-40˚C to +85˚C.............................................. 14-Pin NSOIC /TR = Tape and Reel Pack quantity is 2500 for Narrow SOIC. DATE REVISION DESCRIPTION 03/08/07 J 06/12/09 1.0.0 Convert to Exar format, update ordering information and change revision to 1.0.0 05/24/13 1.0.1 Correct type error per PCN 13-0503-01 Legacy Sipex Datasheet ECN: 1322-02 05/24/13 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  SP1490_SP1491E_101_052413