SP3491EN-L/TR

SP3490 / SP3491 3.3V Low Power Full-Duplex RS-485 Transceivers with 10Mbps Data Rate Description FEATURES ■■ Full-duplex RS-485 and RS-422 transceivers ■■ Operates from a single 3.3V supply ■■ Interoperable with 5.0V logic ■■ Driver/receiver tri-state enable lines (SP3491) ■■ -7V to 12V common-mode input voltage range ■■ ±200mV receiver input sensitivity ■■ Allows up to 32 transceivers on the serial bus ■■ Compatability with LTC490 and SN75179 (SP3490) ■■ Compatability with LTC491 and SN75180 (SP3491) The SP3490 and SP3491 devices are 3.3V low power full-duplex transceivers that meet the specifications of the RS-485 and RS-422 serial protocols. These devices are pin-to-pin compatible with the MaxLinear SP490 and SP491 devices as well as popular industry standards. The SP3490 and SP3491 feature MaxLinear’s BiCMOS process, allowing low power operation without sacrificing performance. The SP3490 and SP3491 meet the electrical specifications of the RS-485 and RS-422 serial protocols up to 10Mbps under load. The SP3491 is identical to the SP3490 with the addition of driver and reciveiver tri-state enable lines. Ordering Information - Back Page Block Diagrams VCC R D GND 1 NC 2 3 R 8 A 7 B 6 D 4 R 1 2 R 3 REB DE 4 Z D 5 Y GND GND SP3490 5 6 7 14 VCC 13 NC 12 A 11 B 10 D Z 9 Y 8 NC SP3491 REV 1.0.3 1/12 SP3490 / SP3491 Absolute Maximum Ratings Operating Conditions 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. Package Power Dissipation VCC................................................................................ 6.0V Input Voltages Logic...................................... -0.3V to 6.0V 8-pin NSOIC ѲJA................................................. 128.4˚C/W 14-pin NSOIC ѲJA................................................. 88.2˚C/W ESD Rating Human Body Model (HBM)........................................... ±2kV Drivers................................... -0.3V to 6.0V Receivers............................................ ±14V Output Voltages Drivers................................................ ±14V Receivers............................... -0.3V to 6.0V Storage Temperature..................................-65˚C to +150˚C Maximum Junction Temperature, TJ...........................125˚C Power Dissipation 8-pin NSOIC............................................................. 600mW (derate 6.90mW/°C above +70°C) 14-pin NSOIC .......................................................... 700mW (derate 8.33mW/°C above +70°C) Electrical Characteristics TAMB = TMIN to TMAX and VCC = 3.3V ±5% unless otherwise noted. PARAMETERS MIN. TYP. MAX. UNITS CONDITIONS SP3490 Driver DC Characteristics Differential output voltage Vcc V Unloaded; R = ∞Ω ; Figure 1 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 Change in magnitude of driver differential output voltage for complimentary states Driver common-mode output voltage Input high voltage 2.0 V Input low voltage 0.8 V Input current ±10 µA Driver short circuit current VOUT = HIGH ±250 mA -7V ≤ VO ≤ 12V; Figure 8 Driver short circuit current VOUT = LOW ±250 mA -7V ≤ VO ≤ 12V; Figure 8 SP3490 Driver AC Characteristics Maximum data rate 10 Driver input to output, tPLH 20 40 60 Mbps ns R = 27Ω, Figures 2 & 9 Driver input to output, tPHL 20 40 60 ns R = 27Ω, Figures 2 & 9 REV 1.0.3 2/12 SP3490 / SP3491 Electrical Characteristics (Continued) TAMB = TMIN to TMAX and VCC = 3.3V ±5% unless otherwise noted. PARAMETERS MIN. TYP. MAX. UNITS CONDITIONS SP3490 Driver AC Characteristics (Continued) Differential driver skew 2 Driver rise or fall time 5 ns |tPHL(Y)- tPLH(Y)|, |tPHL(Z)- tPLH(Z)|, Figures 2 and 9 20 ns From 10%-90%; Figures 3 and 10 0.2 Volts SP3490 Receiver DC Characteristics Differential input threshold -0.2 Input hysteresis Output voltage HIGH 25 Vcc-0.4 Output voltage LOW Input resistance mV 0.4 12 15 -7V ≤ VCM ≤ 12V VCM = 0V Volts VID = 200mV, IO = -1.5mA Volts VID = -200mV, IO = 2.5mA kΩ -7V ≤ VCM ≤ 12V Input current (A, B); VIN = 12V 1.0 mA VIN = 12V Input current (A, B); VIN = -7V -0.8 mA VIN = -7V 60 mA 0V ≤ VO ≤ VCC Short circuit current SP3490 Receiver AC Characteristics Maximum data rate 10 Receiver input to output, tPLH 40 Mbps 70 Receiver input to output, tPLH Receiver input to output, tPHL 40 70 Receiver input to output, tPHL Differential receiver skew 120 ns Figures 6 and 12 85 ns TAMB = 25°C, Vcc = 3.3V, Figures 6 and 12 120 ns Figures 6 and 12 85 ns TAMB = 25°C, Vcc = 3.3V, Figures 6 and 12 ns |tPHL(A)- tPLH(A)|, |tPHL(B)- tPLH(B)|, Figures 6 and 12 4 Power Requirements Supply Voltage Supply Current ESD Protection for D, R, A, B, Y and Z pins 3.0 3.3 3.6 V 1000 2000 µA D = 0V or VCC kV Human Body Model ±2 REV 1.0.3 3/12 SP3490 / SP3491 Electrical Characteristics, Continued TAMB = TMIN to TMAX and VCC = 3.3V ±5% unless otherwise noted PARAMETERS MIN. TYP. MAX. UNITS CONDITIONS Vcc V Unloaded; R = ∞Ω ; Figure 1 SP3491 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, D, REB 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, D, REB Input current ±10 µA Applies to DE, D, REB Driver short circuit current VOUT = HIGH ±250 mA -7V ≤ VO ≤ 12V; Figure 8 Driver short circuit current VOUT = LOW ±250 mA -7V ≤ VO ≤ 12V; Figure 8 SP3491 Driver AC Characteristics Maximum data rate 10 Mbps Driver input to output, tPLH 20 40 60 ns Figures 2 & 9 Driver input to output, tPHL 20 40 60 ns Figures 2 & 9 ns |tPHL(Y)- tPLH(Y)|, |tPHL(Z)- tPLH(Z)|, Figures 2 and 9 Differential driver skew 2 Driver rise or fall time 5 20 ns From 10%-90%; Figures 3 and 10 Driver enable to output HIGH 52 120 ns Figures 4 and 11 Driver enable to output LOW 60 120 ns Figures 5 and 11 Driver disable from LOW 40 120 ns Figures 5 and 11 Driver disable from HIGH 60 120 ns Figures 4 and 11 REV 1.0.3 4/12 SP3490 / SP3491 Electrical Characteristics, Continued TAMB = TMIN to TMAX and VCC = 3.3V ±5% unless otherwise noted PARAMETERS MIN. TYP. MAX. UNITS 0.2 Volts CONDITIONS SP3491 Receiver DC Characteristics Differential input threshold -0.2 Input hysteresis Output voltage HIGH 25 mV Vcc-0.4 -7V ≤ VCM ≤ 12V VCM = 0V Volts VID = 200mV, IO = -1.5mA Output voltage LOW 0.4 Volts VID = -200mV, IO = 2.5mA Three-State ( High Impedance) Output Current ±1 µA 0V ≤ VO ≤ Vcc; REB = Vcc kΩ -7V ≤ VCM ≤ 12V Input resistance 12 15 Input current (A, B); VIN = 12V 1.0 mA DE = 0V, VCC = 0V or 3.6V, VIN = 12V Input current (A, B); VIN = -7V -0.8 mA DE = 0V, VCC = 0V or 3.6V, VIN = -7V 60 mA 0V ≤ VO ≤ VCC Short circuit current SP3491 Receiver AC Characteristics Maximum data rate 10 Receiver input to output, tPLH 40 Mbps 70 Receiver input to output, tPLH Receiver input to output, tPHL 40 70 Receiver input to output, tPHL REB = 0V, DE = 0V 120 ns Figures 6 and 12 85 ns TAMB = 25°C, Vcc = 3.3V, Figures 6 and 12 120 ns Figures 6 and 12 85 ns TAMB = 25°C, Vcc = 3.3V, Figures 6 and 12 ns |tPHL(A)- tPLH(A)|, |tPHL(B)- tPLH(B)|, Figures 6 and 12 Differential receiver skew 4 Receiver enable to output LOW 65 150 ns Figures 7 and 13; S1 Closed, S2 open Receiver enable to output HIGH 65 150 ns Figures 7 and 13; S2 Closed, S1 open Receiver disable from LOW 65 200 ns Figures 7 and 13; S1 Closed, S2 open Receiver disable from HIGH 65 200 ns Figures 7 and 13; S2 Closed, S1 open 3.6 V Power Requirements Supply voltage 3.0 Supply current 1000 2000 µA REB, D = 0V or VCC; DE = VCC Supply current 800 1500 µA DE = 0V ESD protection for R, D, DE, REB, A, B, Y and Z pins ±2 kV Human Body Model REV 1.0.3 5/12 SP3490 / SP3491 Pin Functions VCC R D 1 Pin Number 2 3 R 6 D 4 GND 8 A 7 B Z 5 Y Pin Name Description 1 VCC Positive supply 3.00V < Vcc < 3.60V 2 R Receiver output 3 D Driver Input 4 GND Ground connection 5 Y Non-inverting driver output 6 Z Inverting driver output 7 B Inverting receiver Input 8 A Non-inverting receiver input SP3490 Pinout (Top View) NC R 1 2 R 3 REB DE 4 D GND GND 5 6 7 14 VCC 13 NC 12 A 11 B 10 D Pin Number Z 9 Y 8 NC SP3491 Pinout (Top View) Pin Name Description 1 NC No connect 2 R Receiver output 3 REB Receiver output enable active LOW 4 DE Driver output enable active HIGH 5 D Driver input 6 GND Ground connection 7 GND Ground connection 8 NC No connect(1) 9 Y Non-inverting driver output 10 Z Inverting driver output 11 B Inverting receiver input 12 A Non-Inverting receiver input 13 NC No connect(1) 14 VCC Positive supply 3.00V < Vcc < 3.60V (1) Note: 1. Not internally bonded, can be connected to Vcc without harm. REV 1.0.3 6/12 SP3490 / SP3491 Test Circuits V DM R L = 27Ω R S1 D VOD D GENERATOR (NOTE 1) R Vcc OUT 50Ω C L = 15pF (NOTE 2) V CC VOC V OM = VOH + VOL ≈ 1.5V 2 Figure 1: Driver DC Test Load Circuit Figure 2: Driver Propagation Delay Test Circuit S1 D CL RL = OUT 60Ω D GENERATOR (NOTE 1) 50Ω OUT R L = 110Ω C L = 50pF (NOTE 2) GENERATOR (NOTE 1) VCC 50Ω VOM = VOH + VOL ≈ 1.5V 2 C L = 15pF (NOTE 2) Figure 3: Driver Differential Output Delay and Transition Time Circuit. Figure 4: Driver Enable and Disable Timing Circuit, Output High VCC S1 0V OR 3V V ID R L = 110Ω D GENERATOR (NOTE 1) OUT R OUT 50Ω C L = 15pF (NOTE 2) C L = 50pF (NOTE 2) GENERATOR (NOTE 1) 50Ω 1.5V VOM = VCC 2 0V Figure 5: Driver Enable and Disable Timing Circuit, Output Low S1 S3 1.5V VCC 1k -1.5V Figure 6: Receiver Propagation Delay Test Circuit VID R DE = 0 or Vcc S2 DI = 0 or Vcc C L = 15pF (NOTE 2) GENERATOR (NOTE 1) A/Y B/Z 50Ω IOSD D 100Ω -7V to +12V V Figure 7: Receiver Enable and Disable Timing Circuit Figure 8: Driver Short Circuit Current Limit Test REV 1.0.3 7/12 SP3490 / SP3491 Switching Waveforms 3V 3V INPUT 1.5V 1.5V tPLH tPHL IN 0V VOH 0V t DO1 VOM VOM Y OUTPUT 1.5V 1.5V t DO2 VOL tPHL VOH Z OUTPUT tPLH OUT VOM VOM 50% 10% 90% 90% 50% 10% -2.0V VOL t TD VOM 2.0V t TD = VOH + VOL ≈ 1.5V 2 Figure 9: Driver Propagation Delay Waveforms Figure 10: Driver Differential Output Delay and Transition Time Waveforms 3V 1.5V 1.5V DE 3V 0V VOH OUTPUT HIGH OUTPUT LOW INPUT tPHZ tPZH 0.25V VOM 1.5V 1.5V tRPLH tRPHL 0V 0V VCC tPZL VCC tPLZ VOM VOL OUTPUT 0V 0.25V VOM = VCC 2 VOM = VOH + VOL ≈ 1.5V 2 Figure 11: Driver Enable and Disable Timing Waveforms 3V 0V VOH OUTPUT Figure 12: Receiver Propagation Delay Waveforms S1 is open S2 is closed S3 = 1.5V 3V 1.5V 1.5V REB tPRHZ 10% VOM VOM S1 is closed S2 is open S3 = -1.5V 1.5V 1.5V REB 0V tPRZH tPRSH tPRLZ VCC 1.5V OUTPUT 1.5V VOL 0V tPRZL tPRSL 10% Figure 13: Receiver Enable and Disable Waveforms NOTES 1. The input pulse is supplied by a generator with the following characteristics: PRR = 250kHz, 50% duty cycle, tR < 6.0ns, ZO = 50Ω. 2. CL includes probe and stray capacitance. REV 1.0.3 8/12 SP3490 / SP3491 Description The SP3490 and SP3491 are two members in the family of 3.3V low power full-duplex transceivers that meet the electrical specifications of the RS-485 and RS-422 serial protocols. These devices are pin-to-pin compatible with the MaxLinear SP490 and SP491 devices as well as popular industry standards. The SP3490 and SP3491 feature MaxLinear’s BiCMOS process allowing low power operation without sacrificing performance. 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. Receivers The receivers of the SP3490 and SP3491 have differential inputs with an input sensitivity of ±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 SP3490 and SP3491 are equipped with a failsafe feature that guarantees the receiver output will be in a HIGH state when the input is left unconnected. The receiver of the SP3491 has a enable control line which is active LOW. A logic LOW on REB (pin 3) of the SP3491 will enable the differential receiver. A logic HIGH on REB (pin 3) of the SP3491 will tri-state the receiver. Drivers The drivers for both the SP3490 and SP3491 have differential outputs. The typical voltage output swing with no load will be 0 volts to Vcc. With worst case loading of 54Ω across the differential outputs, the drivers can maintain greater than 1.5V voltage levels. The driver of the SP3491 has a driver enable control line which is active HIGH. A logic HIGH on DE (pin 4) of the SP3491 will enable the differential driver outputs. A logic LOW on the DE (pin 4) will tri-state the driver outputs. The SP3490 does not have a driver enable. REV 1.0.3 9/12 SP3490 / SP3491 Mechanical Dimensions NSOIC8 Top View Front View Side View Drawing No: Revision: REV 1.0.3 POD-00000108 A 10/12 SP3490 / SP3491 Mechanical Dimensions NSOIC14 Top View Front View Side View Drawing No: POD-00000109 Revision: REV 1.0.3 A 11/12 SP3490 / SP3491 Ordering Information(1) Part Number Operating Temperature Range SP3490CN-L/TR Lead-Free Package 0°C to 70°C SP3490EN-L Reel 8-pin NSOIC -40°C to 85°C SP3490EN-L/TR SP3491CN-L Yes Tube (2) 14-pin NSOIC SP3491EN-L -40°C to 85°C SP3491EN-L/TR Tube Reel 0°C to 70°C SP3491CN-L/TR Packaging Method Reel Tube Reel NOTE: 1. Refer to www.exar.com/SP3490 and www.exar.com/SP3491 for most up-to-date Ordering Information. 2. Visit www.exar.com for additional information on Environmental Rating. Revision History Revision Date 10/11/02 -- 06/08/10 1.0.0 Convert to Exar Format. Update ordering information as a result of discontinued Lead type package options per PDN 081126-01. Change revision to 1.0.0. Add new Figure 8 - Driver Short Circuit Current Limit Test Circuit 9/14/10 1.0.1 Correct package type for SP3491 options in ordering table from 8 pin NSOIC to 14 pin NSOIC 10/27/10 1.0.2 Add ESD protection levels of +/-2kV. Remove SP3490 Supply Current rating for DE = 0V (No driver enable for SP3490). 1.0.3 Update to MaxLinear logo. Update pin description table to include note on NC pin. Remove GND from Differential Output Voltage min (page 2 and 4). Added maximum junction temperature, package power dissipation and ESD rating. Update format and ordering information table. 09/06/17 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 Legacy Sipex Datasheet High Performance Analog: 48720 Kato Road Fremont, CA 94538 Tel.: +1 (510) 668-7000 Fax: +1 (510) 668-7001 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. © 2017 MaxLinear, Inc. All rights reserved SP3490_SP3491_DS_090617 REV 1.0.3 12/12