SP485EEP-L

SP481E / SP485E Enhanced Low Power Half-Duplex RS-485 Transceivers Description The SP481E and SP485E are a family of half-duplex transceivers that meet the specifications of RS-485 and RS-422 serial protocols with enhanced ESD performance. The ESD tolerance has been improved on these devices to over ±15kV for both Human Body Model and IEC61000-4-2 Air Discharge Method. These devices are pin-to-pin compatible with MaxLinear’s SP481 and SP485 devices as well as popular industry standards. As with the original versions, the SP481E and SP485E feature Maxlinear’s BiCMOS design allowing low power operation without sacrificing performance. The SP481E and SP485E meet the requirements of the RS-485 and RS-422 protocols up to 10Mbps under load. The SP481E is equipped with a low power shutdown mode. FEATURES ■■ 5V only ■■ Low power BiCMOS ■■ Driver / receiver enable for multi-drop configurations ■■ Low power shutdown mode (SP481E) ■■ Enhanced ESD specifications: ±15kV Human Body Model ±15kV IEC61000-4-2 Air Discharge ±8kV IEC61000-4-2 Contact Discharge ■■ Available in RoHS compliant, lead free packaging. Ordering Information - Back Page Block Diagram R RO 1 8 VCC RE 2 7 B DE 3 6 A DI 4 D 5 GND SP481E and SP485E REV 1.0.5 1/9 SP481E / SP485E 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. ESD Ratings HBM - Human Body Model (A and B pins).................±15kV HBM - Human Body Model (All other pins)................... ±3kV IEC61000-4-2 Air Discharge (A and B pins)...............±15kV IEC61000-4-2 Contact Discharge (A and B pins).........±8kV VCC.............................................................................. ..7.0V Input Voltages Logic......................... -0.3V to (VCC + 0.5V) Drivers......................-0.3V to (VCC + 0.5V). Receivers............................................ ±15V Output Voltages Logic......................... -0.3V to (VCC + 0.5V) Drivers................................................ ±15V Receivers..................-0.3V to (VCC + 0.5V) Storage Temperature..................................-65˚C to +150˚C Power Dissipation 8-pin NSOIC............................................................. 550mW (derate 6.60mW/°C above +70°C) Electrical Characteristics TAMB = TMIN to TMAX and VCC = 5V ±5% unless otherwise noted. PARAMETERS MIN. TYP. MAX. UNITS CONDITIONS VCC V Unloaded; R = ∞Ω ; Figure 1 SP481E / SP485E Driver DC Characteristics Differential output voltage Differential output voltage 2 VCC V With load; R = 50Ω (RS-422); Figure 1 Differential output voltage 1.5 VCC V With load; R = 27Ω (RS-485); Figure 1 0.2 V R = 27Ω or R = 50Ω; Figure 1 3 V R = 27Ω or R = 50Ω; Figure 1 V Applies to DE, DI, RE Change in magnitude of driver differential output voltage for complimentary states Driver common-mode output voltage Input high voltage 2.0 Input low voltage 0.8 V Applies to DE, DI, RE Input current ±10 µA Applies to DE, DI, RE Driver short circuit current VOUT = HIGH ±250 mA -7V ≤ VO ≤ 12V Driver short circuit current VOUT = LOW ±250 mA -7V ≤ VO ≤ 12V REV 1.0.5 2/9 SP481E / SP485E Electrical Characteristics (Continued) TAMB = TMIN to TMAX and VCC = 5V ±5% unless otherwise noted. PARAMETERS MIN. TYP. MAX. UNITS CONDITIONS SP481E / SP485E Driver AC Characteristics Maximum data rate 10 Mbps RE = 5V, DE = 5V; RDIFF = 54Ω, CL1 = CL2 = 100pF Driver input to output, tPLH 30 60 ns Driver input to output, tPLH (SP485EMN ONLY) 30 80 ns Driver input to output, tPHL 30 60 ns Driver input to output, tPHL (SP485EMN ONLY) 30 80 ns See Figures 3 & 5, RDIFF = 54Ω, CL1 = CL2 = 100pF Driver skew 5 10 ns See Figures 3 and 5, tSKEW = |tDPHL - tDPLH| Driver rise or fall time 15 40 ns From 10%-90%; RDIFF = 54Ω CL1 = CL2 = 100pF; See Figures 3 and 6 Driver enable to output high 40 70 ns CL = 100pF, See Figures 4 and 6, S2 closed Driver enable to output low 40 70 ns CL = 100pF, See Figures 4 and 6, S1 closed Driver disable time from high 40 70 ns CL = 100pF, See Figures 4 and 6, S2 closed Driver disable time from low 40 70 ns CL = 100pF, See Figures 4 and 6, S1 closed See Figures 3 & 5, RDIFF = 54Ω, CL1 = CL2 = 100pF SP481E / SP485E Receiver DC Characteristics Differential input threshold -0.2 0.2 Volts -7V ≤ VCM ≤ 12V Differential input threshold (SP485EMN ONLY) -0.4 0.4 Volts -7V ≤ VCM ≤ 12V Input hysteresis Output voltage high 20 mV 3.5 VCM = 0V Volts VID = 200mV, IO = -4mA VID = 200mV, IO = 4mA Output voltage low 0.4 Volts Three-state ( high impedance) output current ±1 µA 0.4V ≤ VO ≤ 2.4V; RE = 5V kΩ -7V ≤ VCM ≤ 12V Input current (A, B); VIN = 12V 1.0 mA DE = 0V, VCC = 0V or 5.25V, VIN = 12V Input current (A, B); VIN = -7V -0.8 mA DE = 0V, VCC = 0V or 5.25V, VIN = -7V 95 mA 0V ≤ VO ≤ VCC Input resistance Short circuit current 12 15 7 SP481E / SP485E Receiver AC Characteristics Maximum data rate 10 Mbps RE = 0V, DE = 0V Receiver input to output 20 45 100 ns tPLH ; See Figures 3 & 7, RDIFF = 54Ω, CL1 = CL2 = 100pF Receiver input to output 20 45 100 ns tPHL ; See Figures 3 & 7, RDIFF = 54Ω, CL1 = CL2 = 100pF ns RDIFF = 54Ω, CL1 = CL2 = 100pF, See Figures 3 and 7 Differential receiver skew |tPHL - tPLH| 13 Receiver enable to output low 45 70 ns CRL = 15pF, Figures 2 & 8; S1 Closed Receiver enable to output high 45 70 ns CRL = 15pF, Figures 2 & 8; S2 Closed Receiver Disable from low 45 70 ns CRL = 15pF, Figures 2 & 8; S1 Closed Receiver Disable from high 45 70 ns CRL = 15pF, Figures 2 & 8; S2 Closed REV 1.0.5 3/9 SP481E / SP485E Electrical Characteristics, Continued TAMB = TMIN to TMAX and VCC = 5V ±5% unless otherwise noted PARAMETERS MIN. TYP. MAX. UNITS CONDITIONS 50 200 600 ns RE = 5V, DE = 0V Driver enable from shutdown to output high 40 100 ns CL = 100pF; See Figures 4 and 6; S2 Closed Driver enable from shutdown to output low 40 100 ns CL = 100pF; See Figures 4 and 6; S1 Closed Receiver enable from shutdown to output high 300 1000 ns CL = 15pF; See Figures 2 and 8; S2 Closed Receiver enable from shutdown to output low 300 1000 ns CL = 15pF; See Figures 2 and 8; S1 Closed 5.25 Volts SP481E Shutdown Timing Time to shutdown Power Requirements Supply voltage VCC 4.75 Supply current No load 900 µA RE, DI = 0V or VCC; DE = VCC 600 µA RE = 0V, DI = 0V or 5V; DE = 0V 10 µA DE = 0V, RE = VCC Shutdown mode (SP481E) Environmental and Mechanical Operating Temperture Commercial (_C_) 0 70 °C Industrial (_E_) -40 85 °C (_M_) -40 125 °C -65 150 °C Storage Temperature Package NSOIC (_N) Pin Functions Pin Number Pin Name Description 1 RO Receiver output 8 VCC 2 RE Receiver output enable active LOW RE 2 7 B 3 DE Driver output enable active HIGH DE 3 6 A 4 DI Driver input 5 GND Ground connection 6 A Non-inverting driver output / receiver input 7 B Inverting driver output / receiver input 8 VCC Positive supply 4.75V ≤ Vcc ≤ 5.25V R RO 1 DI 4 D 5 GND SP481E and SP485E Pinout (Top View) REV 1.0.5 4/9 SP481E / SP485E Test Circuits A VOD R 1kΩ S2 B Figure 1: RS-485 Driver DC Test Load Circuit DI A B VCC S1 CRL VOC 1kΩ Test Point Receiver Output R CL1 A RL B CL2 Figure 2: Receiver Timing Test Load Circuit RO Output Under Test 15pF 500Ω VCC S1 CL S2 Figure 3: RS-485 Driver/Receiver Timing Test Circuit Figure 4: Driver Timing Test Load #2 Circuit Switching Waveforms DRIVER INPUT f ≥ 1MHz; t R ≤ 10ns; t F ≤ 10ns +3V 1.5V 0V DRIVER OUTPUT B A 1.5V t PLH t PHL VO 1/2VO 1/2VO t DPLH DIFFERENTIAL VO+ OUTPUT 0V VA – VB VO– t DPHL tR tF t SKEW = |t DPLH - t DPHL| Figure 5: Driver Propagation Delays REV 1.0.5 5/9 SP481E / SP485E Switching Waveforms (Continued) DE 1.5V 0V 1.5V t LZ t ZL 5V A, B A, B f = 1MHz; t R < 10ns; t F < 10ns +3V 2.3V VOL VOH 2.3V 0V Output normally LOW 0.5V Output normally HIGH 0.5V t ZH t HZ Figure 6: Driver Enable and Disable Times A– B R f = 1MHz; t R ≤ 10ns ; t F ≤ 10ns VOD2 + VOD2 0V – VOH VOL 0V INPUT 1.5V 1.5V OUTPUT t PHL t PLH Figure 7: Receiver Propagation Delays RE R +3V 0V 5V VIL 1.5V f = 1MHz; t ≤ 10ns; t ≤ 10ns R F t ZL 1.5V VIH R 0V 1.5V 1.5V t LZ Output normally LOW 0.5V Output normally HIGH 0.5V t ZH t HZ Figure 8: Receiver Enable and Disable Times REV 1.0.5 6/9 SP481E / SP485E Description The SP481E and SP485E are half-duplex differential transceivers that meet the requirements of RS-485 and RS-422. Fabricated with an Maxlinear proprietary BiCMOS process, this product requires a fraction of the power of older bipolar designs. The RS-485 standard is ideal for multi-drop applications and 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. Shutdown Mode The SP481E is equipped with a Shutdown mode. To enable the shutdown state, both driver and receiver must be disabled simultaneously. A logic LOW on DE (pin 3) and a Logic HIGH on RE (pin 2) will put the SP481E into Shutdown mode. In Shutdown, supply current will drop to typically 1µA. Drivers The driver outputs of the SP481E and SP485E are differential outputs meeting the RS-485 and RS-422 standards. 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 drivers can maintain greater than 1.5V voltage levels. The drivers of the SP481E and SP485E have an enable control line which is active HIGH. A logic HIGH on DE (pin 3) will enable the differential driver outputs. A logic LOW on the DE (pin 3) will tri-state the driver outputs. The transmitters of the SP481E and SP485E will operate up to at least 10Mbps. Receivers The SP481E and SP485E receivers 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 of the SP481E and SP485E have a tri-state enable control pin. A logic LOW on RE (pin 2) will enable the receiver, a logic HIGH on RE (pin 2) will disable the receiver. INPUTS OUTPUTS RE DE DI LINE CONDITION A B X 1 1 No Fault 1 0 X 1 0 No Fault 0 1 X 0 X X Z Z X 1 X Fault Z Z Table 1: Transmit Function Truth Table INPUTS OUTPUTS RE DE A-B R 0 0 0 0.2V 1 0 -0.2V 0 0 0 Inputs Open 1 1 0 X Z Table 2: Receive Function Truth Table The receiver for the SP481E and SP485E will operate up to at least 10Mbps. The receiver for each of the two devices is 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. REV 1.0.5 7/9 SP481E / SP485E Mechanical Dimensions NSOIC8 Top View Front View Side View Drawing No: Revision: REV 1.0.5 POD-00000108 A 8/9 SP481E / SP485E Ordering Information(1) Part Number Operating Temperature Range Lead-Free Package Packaging Method SP481ECN-L/TR 0°C to 70°C Reel SP481EEN-L/TR -40°C to 85°C Reel SP485ECN-L Tube 0°C to 70°C SP485ECN-L/TR SP485EEN-L Yes (2) 8-pin NSOIC -40°C to 85°C SP485EEN-L/TR SP485EMN-L/TR Reel Tube Reel -40°C to 125°C Reel NOTE: 1. Refer to www.exar.com/SP481E and www.exar.com/SP485E for most up-to-date Ordering Information. 2. Visit www.exar.com for additional information on Environmental Rating. Revision History Revision Date -- 05/11/07 Legacy Sipex Datasheet 1.0.0 12/18/08 Convert to Exar Format. Update ordering information as a result of discontinued Lead type package options per PDN 081126-01. Remove "Top Mark" information from ordering page. 1.0.1 11/19/09 Correct table 1 error for driver output A and B outputs 1.0.2 08/08/10 Change SP485EMN-L and SP485EMN-L/TR temperature range error from +85C to +125C in ordering information section. 1.0.3 05/27/11 Remove driver minimum limits of propagation delay and Rise/Fall time. Remove SP481ECP-L and SP481EEP-L per PDN 110510-01 1.0.4 05/24/13 Correct type errors per PCN 13-0503-01 03/12/18 Update to MaxLinear logo. Remove GND from Differential Output Voltage min (page 2). Update format and ordering information table. Truth Tables moved to page 7 description section. Removed obsolete PDIP from absolute maximums, mechanicals and mechanical dimensions. ESD IEC61000-4-2 Contact Discharge rating added. 1.0.5 Corporate Headquarters: 5966 La Place Court Suite 100 Carlsbad, CA 92008 Tel.:+1 (760) 692-0711 Fax: +1 (760) 444-8598 www.maxlinear.com Description High Performance Analog: 1060 Rincon Circle San Jose, CA 95131 Tel.: +1 (669) 265-6100 Fax: +1 (669) 265-6101 Email: serialtechsupport@exar.com www.exar.com The content of this document is furnished for informational use only, is subject to change without notice, and should not be construed as a commitment by MaxLinear, Inc.. MaxLinear, Inc. assumes no responsibility or liability for any errors or inaccuracies that may appear in the informational content contained in this guide. Complying with all applicable copyright laws is the responsibility of the user. Without limiting the rights under copyright, no part of this document may be reproduced into, stored in, or introduced into a retrieval system, or transmitted in any form or by any means (electronic, mechanical, photocopying, recording, or otherwise), or for any purpose, without the express written permission of MaxLinear, Inc. Maxlinear, Inc. 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 MaxLinear, Inc. receives, in writing, 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 MaxLinear, Inc. is adequately protected under the circumstances. MaxLinear, Inc. may have patents, patent applications, trademarks, copyrights, or other intellectual property rights covering subject matter in this document. Except as expressly provided in any written license agreement from MaxLinear, Inc., the furnishing of this document does not give you any license to these patents, trademarks, copyrights, or other intellectual property. Company and product names may be registered trademarks or trademarks of the respective owners with which they are associated. © 2007 - 2018 MaxLinear, Inc. All rights reserved SP481E_SP485E_DS_031218 REV 1.0.5 9/9