SP3483EN-L/TR

SP3483 3.3V Low Power Slew Rate Limited Half-Duplex RS-485 Transceiver Description The SP3483 device is part of a family of 3.3V low power halfduplex transceivers that meet the specifications of the RS-485 and RS-422 serial protocols. This device is pin-to-pin compatible with the MaxLinear SP483 device as well as popular industry standards. The SP3483 features MaxLinear’s BiCMOS design allowing low power operation without sacrificing performance. The SP3483 is slew rate limited to reduce EMI and can meet the requirements of the RS-485 and RS-422 protocols up to 250kbps. FEATURES ■■ RS-485 and RS-422 transceiver ■■ Operates from a single 3.3V Supply ■■ Interoperable with 5.0V logic ■■ Driver/receiver enable ■■ Low power shutdown mode ■■ -7V to +12V common-mode input voltage range ■■ Allows up to 32 transceivers on the serial bus ■■ Compatibility with the industry standard 75176 pinout ■■ Driver output short-circuit protection ■■ Slew rate limited driver for low EMI Ordering Information - Back Page Block Diagram R RO 1 8 VCC RE 2 7 B DE 3 6 A DI 4 D 5 GND SP3483 REV 1.0.1 1/9 SP3483 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 8-pin NSOIC ѲJA................................................. 128.4˚C/W ESD Rating Human Body Model (HBM)........................................... ±2kV Logic...................................... -0.3V to 6.0V Drivers................................... -0.3V to 6.0V Receivers............................................ ±15V Output Voltages Drivers................................................ ±15V Receivers............................... -0.3V to 6.0V Storage Temperature..................................-65˚C to +150˚C Maximum Junction Temperature, TJ...........................125˚C Power Dissipation 8-pin NSOIC............................................................. 500mW (derate 6.14mW/°C above +70°C) Electrical Characteristics 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 SP3483 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; Figure 8 Driver short circuit current VOUT = LOW ±250 mA -7V ≤ VO ≤ +12V; Figure 8 SP3483 Driver AC Characteristics Maximum data rate 250 kbps Driver input to output, tPLH 400 900 1500 ns Figures 2 & 9 Driver input to output, tPHL 400 900 1500 ns Figures 2 & 9 ns |tDO1- tDO2|, Figures 2 and 10 ns From 10%-90%; Figures 3 and 10 Differential driver skew 10 Driver rise or fall time 700 1000 REV 1.0.1 RE = VCC, DE = VCC 2/9 SP3483 Electrical Characteristics (Continued) TAMB = TMIN to TMAX and VCC = 3.3V ±5% unless otherwise noted. PARAMETERS MIN. TYP. MAX. UNITS CONDITIONS Driver enable to output high 700 1300 ns Figures 4 and 11 Driver enable to output low 690 1300 ns Figures 5 and 11 Driver disable time from high 80 120 ns Figures 5 and 11 Driver disable time from low 90 120 ns Figures 4 and 11 0.2 Volts -7V ≤ VCM ≤ 12V SP3483 Driver AC Characteristics (Continued) SP3483 Receiver DC Characteristics Differential input threshold -0.2 Input hysteresis Output voltage HIGH 20 mV Vcc-0.4 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; RE = 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 ≤ VCM ≤ VCC Short circuit current 7 SP3483 Receiver AC Characteristics Maximum data rate 250 Receiver input to output, tRPLH 35 70 Receiver input to output, tRPHL 35 70 kbps RE = 0V, DE = 0V 120 ns Figures 6 and 12 120 ns Figures 6 and 12 ns tRSKEW = |tRPHL- tRPLH|, Figures 6 and 12 Differential receiver skew 50 Receiver enable to output low 45 70 ns Figures 7 and 13, S1 closed, S2 open Receiver enable to output high 45 70 ns Figures 7 and 13, S2 closed, S1 open Receiver disable from low 45 70 ns Figures 7 and 13, S1 closed, S2 open Receiver disable from high 45 70 ns Figures 7 and 13, S2 closed, S1 open REV 1.0.1 3/9 SP3483 Electrical Characteristics (Continued) TAMB = TMIN to TMAX and VCC = 3.3V ±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 2000 ns Figures 4 and 11 Driver enable from shutdown to output low 2000 ns Figures 5 and 11 Receivers enabled from shutdown to output high 2500 ns Figures 7 and 13, S2 closed, S1 open Receivers enabled from shutdown to output low 2500 ns Figures 7 and 13, S1 closed, S2 open SP3483 Shutdown Timing Time to shutdown Power Requirements Supply current, no load 1000 2000 µA RE, DI = 0V or VCC ; DE = VCC Supply current, no load 800 1500 µA RE = 0V, DI = 0V or VCC, DE = 0V 10 µA DE = 0V, RE = VCC Shutdown mode 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 4 DI Driver Input DE 3 6 A 5 GND Ground Connection 6 A Non-Inverting Driver Output / Receiver Input 7 B Inverting Driver Output / Receiver Input 8 VCC Positive Supply R RO 1 DI 4 D 5 GND SP3483 Pinout (Top View) REV 1.0.1 4/9 SP3483 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 S2 DE = 0 or Vcc 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 1.0.1 5/9 SP3483 Switching Waveforms 3V 3V INPUT 1.5V 1.5V tPLH tPHL IN 1.5V 1.5V 0V VOH t DO1 VOM VOM A OUTPUT 0V t DO2 VOL tPHL VOH B OUTPUT tPLH 50% 10% OUT VOM VOM 90% 90% 2.0V 50% 10% -2.0V VOL t TD VOM 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 0V OUTPUT HIGH OUTPUT LOW tPHZ tPZH VOH 3V 0.25V VOM INPUT 0V 0V tPZL VCC tPLZ VOM VCC 0V VOH OUTPUT Figure 12. Receiver Propagation Delay Waveforms 3V 1.5V tPRHZ 10% VOM VOM = VCC 2 S1 is open S2 is closed S3 = 1.5V 1.5V tRPHL 0V Figure 11. Driver Enable and Disable Timing Waveforms RE tRPLH VOM VOM = VOH + VOL ≈ 1.5V 2 3V 1.5V OUTPUT 0.25V VOL 1.5V S1 is closed S2 is open S3 = -1.5V 1.5V 1.5V RE 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 1.0.1 6/9 SP3483 Description The SP3483 device is part of a family of 3.3V low power half-duplex transceivers that meet the specifications of the RS-485 and RS-422 serial protocols. This device is pinto-pin compatible with the MaxLinear SP483 device as well as popular industry standards. The SP3483 features MaxLinear’s BiCMOS process allowing low power operation without sacrificing performance. Shutdown Mode The SP3483 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 SP3483 into Shutdown mode. In Shutdown, supply current will drop to typically 1µA, 10µA maximum. 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 RS485 is a differential interface, data is virtually immune to noise in the transmission line. Drivers The driver outputs of the SP3483 are differential outputs meeting the RS-485 and RS-422 standards. The typical voltage output swing with no load will be 0 Volts to 3.3 Volts. With worst case loading of 54Ω across the differential outputs, the drivers can maintain greater than 1.5V voltage levels. The drivers 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 force the driver outputs into high impedance (high-Z). The SP3483 has internally slew rate limited driver outputs to minimize EMI. The transceivers will operate up to 250kbps. The 250mA ISC maximum limit on the driver output allows the SP3483 to withstand an infinite short circuit over the -7.0V to 12V common mode range without catastrophic damage to the IC. INPUTS OUTPUTS RE DE DI LINE CONDITION B A X 1 1 No Fault 0 1 X 1 0 No Fault 1 0 X 0 X X 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 Receivers The SP3483 receiver has 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 receiver of the SP3483 has a tri-state enable control input RE (Pin 2). A logic LOW on RE will enable the receiver, a logic HIGH on RE will disable the receiver. The receiver of the SP3483 will operate up to 250kbps. The receiver 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 (open circuit). REV 1.0.1 7/9 SP3483 Mechanical Dimensions NSOIC8 Top View Front View Side View Drawing No: Revision: REV 1.0.1 POD-00000108 A 8/9 SP3483 Ordering Information(1) Part Number Operating Temperature Range SP3483CN-L Lead-Free Package Tube 0°C to 70°C SP3483CN-L/TR Yes(2) SP3483EN-L -40°C to 85°C SP3483EN-L/TR Packaging Method 8-pin NSOIC Reel Tube Reel NOTE: 1. Refer to www.exar.com/SP3483 for most up-to-date Ordering Information. 2. Visit www.exar.com for additional information on Environmental Rating. Revision History Revision Date 06/23/04 -- 01/09/12 1.0.0 Convert to Exar Format. Update ordering information as a result of discontinued Lead type package options. Add new Figure 8 - Driver Short Circuit Current Limit Test Circuit. Correct type error for no load supply current. 09/07/17 1.0.1 Update to MaxLinear logo. Remove GND from Differential Output Voltage min (page 2). Added maximum junction temperature, package power dissipation and ESD rating. Update format and ordering information table. Truth Tables moved to page 7 description section. 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: serial techsupport@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 SP3483_DS_090717 REV 1.0.1 9/9