SP490E / SP491E. Enhanced Full-Duplex RS-485 Transceivers. Description. Block Diagrams VCC NC A B A B RE DE 10 Z D GND Y GND GND

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1 Enhanced Full-uplex S-485 Transceivers escription The SP490E is a low power differential line driver/receiver meeting S-485 and S-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 NSOIC packages for operation over the commercial and industrial temperature ranges. The SP491E is available in 14-pin NSOIC packages for operation over the commercial and industrial temperature ranges. FEATUES 5V only Low power BiCMOS river/receiver enable (SP491E) S-485 and S-422 drivers/receivers Pin compatible with LTC490 and SN75179 (SP490E) Pin compatible with LTC491 and SN75180 (SP491E) Improved ES specifications: ±15kV Human Body Model ±15kV IEC Air ischarge Ordering Information - Back Page Block iagrams V CC GN A B Z Y GN GN NC E E VCC NC 2 A 11 B Z Y 7 8 NC SP490E SP491E 1/13

2 Absolute Maximum atings (SP490E) 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. V CC V Input Voltages rivers v to (V CC + 0.5V) eceivers...±14v Output Voltages rivers...±14v eceivers v to (V CC + 0.5V) Storage Temperature C to +150 C Power issipation mw Electrical Characteristics T AMB = T MIN to T MAX and V CC = 5V ±5% unless otherwise noted. PAAMETES MIN. TYP. MAX. UNITS CONITIONS SP490E river C Characteristics ifferential output voltage V CC V Unloaded; = Ω; Figure 1 ifferential output voltage 2 V CC V With load; = 50Ω (S-422); Figure 1 ifferential output voltage 1.5 V CC V With load; = 27Ω (S-485); Figure 1 Change in magnitude of driver differential output voltage for complimentary states 0.2 V = 27Ω or = 50Ω; Figure 1 river common-mode output voltage 3 V = 27Ω or = 50Ω; Figure 1 Input high voltage 2.0 V Applies to Input low voltage 0.8 V Applies to Input current ±10 µa Applies to river short circuit current V OUT = HIGH river short circuit current V OUT = LOW SP490E river AC Characteristics Maximum data rate 10 Mbps ±250 ma -7V V O 12V ±250 ma -7V V O 12V river input to output, t PLH ns IFF = 54Ω, C L1 = C L2 = 100pF; Figures 3 & 5 river input to output, t PHL ns IFF = 54Ω, C L1 = C L2 = 100pF; Figures 3 & 5 river skew 5 ns t SKEW = t PLH - t PHL ; Figures 3 & 5 river rise or fall time ns From 10%-90%; IFF = 54Ω, C L1 = C L2 = 100pF; Figures 3 & 5 2/13

3 Electrical Characteristics (Continued) T AMB = T MIN to T MAX and V CC = 5V ±5% unless otherwise noted. PAAMETES MIN. TYP. MAX. UNITS CONITIONS SP490E eceiver C Characteristics ifferential input threshold Volts -7V V CM 12V Input hysteresis 70 mv V CM = 0V Output voltage HIGH 3.5 Volts V I = 200mV, I O = -4mA Output voltage LOW 0.4 Volts V I = -200mV, I O = 4mA Input resistance kω -7V V CM 12V Input current (A, B); V IN = 12V ±1.0 ma V IN = 12V Input current (A, B); V IN = -7V -0.8 ma V IN = -7V Short circuit current 85 ma 0V V O V CC SP490E eceiver AC Characteristics Maximum data rate 10 Mbps eceiver input to output, t PLH ns eceiver input to output, t PHL ns ifferential receiver skew, t PLH - t PHL 13 ns Power equirements Supply Voltage V Supply Current 900 µa SP490E Environmental and Mechanical Operating Temperture Commercial (_C_) 0 70 C Industrial (_E_) C Storage Temperature C Package NSOIC (_N) IFF = 54Ω, C L1 = C L2 = 100pF; Figures 3 and 7 IFF = 54Ω, C L1 = C L2 = 100pF; Figures 3 and 7 IFF = 54Ω, C L1 = C L2 = 100pF; Figures 3 and 7 3/13

4 Test Circuits A eceiver Test Point Output S 1 1kΩ V CC V O C L 1kΩ V OC B S 2 Figure 1: river C Test Load Circuit Figure 2: eceiver Timing Test Load Circuit 3V E C L1 I IFF C L2 O 15pF Output Under Test C L 500Ω S 1 V CC S 2 Figure 3: river/eceiver Timing Test Circuit Figure 4: river Timing Test Load #2 Circuit 4/13

5 Switching Waveforms I IVE OUTPUT V IFF V Z V Y +3V 0V Z Y V O + 0V V O V O 1/2V O t SKEW = t PLH - t PHL f = 1MHz; t 10ns; t F 10ns 1.5V 1.5V t PLH t PHL t PLH t PHL t t F 1/2V O Figure 5: river Propagation elays E 3V 0V f = 1MHz; t 10ns; t F 10ns 1.5V 1.5V t ZL t LZ Y, Z 2.3V V OL Output normally LOW 0.5V Y, Z V OH 0V 2.3V t ZH Output normally HIGH 0.5V t HZ Figure 6: river Enable and isable Times f = 1MHz; t 10ns; t V F 10ns O2 + A B 0V 0V V INPUT O2 V OH 1.5V OUTPUT 1.5V V OL t PHL t PLH t SKEW = t PLH - t PHL Figure 7: eceiver Propagation elays 5/13

6 Absolute Maximum atings (SP491E) 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. V CC V Input Voltages Logic V to (V CC + 0.5V) rivers v to (V CC + 0.5V) eceivers...±14v Output Voltages Logic V to (V CC + 0.5V) rivers...±14v eceivers v to (V CC + 0.5V) Storage Temperature C to 150 C Power issipation mw Electrical Characteristics T AMB = T MIN to T MAX and V CC = 5V ±5% unless otherwise noted PAAMETES MIN. TYP. MAX. UNITS CONITIONS SP491E river C Characteristics ifferential output voltage V CC V Unloaded; = Ω; Figure 1 ifferential output voltage 2 V CC V With load; = 50Ω (S-422); Figure 1 ifferential output voltage 1.5 V CC V With load; = 27Ω (S-485); Figure 1 Change in magnitude of driver differential output voltage for complimentary states 0.2 V = 27Ω or = 50Ω; Figure 1 river common-mode output voltage 3 V = 27Ω or = 50Ω; Figure 1 Input high voltage 2.0 V Applies to E,, E Input low voltage 0.8 V Applies to E,, E Input current ±10 µa Applies to E,, E river short circuit current V OUT = HIGH river short circuit current V OUT = LOW ±250 ma -7V V O 12V ±250 ma -7V V O 12V 6/13

7 Electrical Characteristics (Continued) T AMB = T MIN to T MAX and V CC = 5V ±5% unless otherwise noted PAAMETES MIN. TYP. MAX. UNITS CONITIONS SP491E river AC Characteristics Maximum data rate 10 Mbps E = 5V, E = 5V river input to output, t PLH ns IFF = 54Ω, C L1 = C L2 = 100pF; Figures 3 & 5 river input to output, t PHL ns IFF = 54Ω, C L1 = C L2 = 100pF; Figures 3 & 5 river skew 5 10 ns t SKEW = t PLH - t PHL ; Figures 3 & 5 river rise or fall time ns From 10%-90%; IFF = 54Ω, C L1 = C L2 = 100pF; Figures 3 & 5 river enable to output HIGH ns C L1 = C L2 = 100pF; Figures 4 & 6, S 2 closed river enable to output LOW ns C L1 = C L2 = 100pF; Figures 4 & 6, S 1 closed river disable time from LOW ns C L1 = C L2 = 100pF; Figures 4 & 6, S 1 closed river disable time from HIGH ns C L1 = C L2 = 100pF; Figures 4 & 6, S 2 closed SP491E eceiver C Characteristics ifferential input threshold Volts -7V V CM 12V Input hysteresis 70 mv V CM = 0V Output voltage HIGH 3.5 Volts V I = 200mV, I O = -4mA Output voltage LOW 0.4 Volts V I = -200mV, I O = 4mA Three-State ( High Impedance) Output Current ±1 µa 0.4V V O 2.4V; E = 5V Input resistance kω -7V V CM 12V Input current (A, B); V IN = 12V ±1.0 ma E = 0V, V CC = 0V or 5.25V, V IN = 12V Input current (A, B); V IN = -7V -0.8 ma E = 0V, V CC = 0V or 5.25V, V IN = -7V Short circuit current 85 ma 0V V O V CC SP491E eceiver AC Characteristics Maximum data rate 10 Mbps E = 0V eceiver input to output, t PLH ns IFF = 54Ω, C L1 = C L2 = 100pF; Figures 3 & 7 eceiver input to output, t PHL ns IFF = 54Ω, C L1 = C L2 = 100pF; Figures 3 & 7 ifferential receiver skew 13 ns t PLH - t PHL ; IFF = 54Ω, C L1 = C L2 = 100pF; Figures 3 & 7 eceiver enable to output LOW ns C L = 15pF; Figures 2 & 8; S 1 closed eceiver enable to output HIGH ns C L = 15pF; Figures 2 & 8; S 2 closed eceiver disable from LOW ns C L = 15pF; Figures 2 & 8; S 1 closed eceiver disable from HIGH ns C L = 15pF; Figures 2 & 8; S 2 closed 7/13

8 Electrical Characteristics, Continued T AMB = T MIN to T MAX and V CC = 5V ±5% unless otherwise noted PAAMETES MIN. TYP. MAX. UNITS CONITIONS Power equirements Supply voltage V Supply current 900 µa E, = 0V or V CC ; E = V CC SP491E Environmental and Mechanical Operating Temperture Commercial (_C_) 0 70 C Industrial (_E_) C Storage Temperature C Package NSOIC (_N) Switching Waveforms 3V E 0V 5V 1.5V V IL f = 1MHz; t 10ns; t F 10ns 1.5V 1.5V t ZL t LZ Output normally LOW 0.5V V IH 0V 1.5V t ZH Output normally HIGH 0.5V t HZ Figure 8: eceiver Enable and isable Times 8/13

9 Pin Functions V CC A B Pin Number Pin Name escription 1 V CC Positive supply 2 eceiver output 3 river Input 4 GN Ground connection GN Z Y 5 Y Non-inverting driver output 6 Z Inverting driver output 7 B Inverting receiver Input 8 A Non-inverting receiver input SP490E Pinout (Top View) GN GN NC E E VCC NC 2 A 11 B Z Y 7 8 NC SP491E Pinout (Top View) Pin Number Pin Name escription 1 NC No connect 2 eceiver output 3 E eceiver output enable active LOW 4 E river output enable active HIGH 5 river input 6 GN Ground connection 7 GN Ground connection 8 NC No connect 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 14 V CC Positive supply 9/13

10 escription The SP490E and SP491E are full-duplex differential transceivers that meet the requirements of S-485 and S-422. Fabricated with a MaxLinear proprietary BiCMOS process, both products require a fraction of the power of older bipolar designs. The S-485 standard is ideal for multi-drop applications or for long-distance interfaces. S-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, S-485 transceivers are equipped with a wide (-7V to 12V) common mode range to accommodate ground potential differences. Because S-485 is a differential interface, data is virtually immune to noise in the transmission line. eceivers 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 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 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. The receiver of the SP491E has a receiver enable control line which is active low. A logic low on E (pin 3) of the SP491E will enable the differential receiver. A logic high on E (pin 3) of the SP491E will tri-state the receiver. rivers 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 54Ω across the differential outputs, the driver can maintain greater than 1.5V voltage levels. The driver of the SP491E has a driver enable control line which is active high. A logic high on E (pin 4) of the SP491E will enable the differential driver outputs. A logic low on E (pin 4) of the SP491E will tri-state the driver outputs. The SP490E does not have a driver enable. 10/13

11 Mechanical imensions NSOIC8 Top View Side View Front View rawing No: evision: A PO /13

12 Mechanical imensions NSOIC14 Top View Side View Front View rawing No: PO evision: A 12/13

13 Ordering Information (1) Part Number Operating Temperature ange Lead-Free Package Packaging Method SP490ECN-L/T 0 C to 70 C eel 8-pin NSOIC SP490EEN-L/T -40 C to 85 C eel SP491ECN-L/T 0 C to 70 C eel 14-pin NSOIC SP491EEN-L/T -40 C to 85 C eel Yes (2) NOTE: 1. efer to and for most up-to-date Ordering Information. 2. Visit for additional information on Environmental ating. evision History evision ate escription Sipex Legacy ata Sheet May 2011 Convert to Exar format. emove driver propagation delay minimum and driver rise/fall time minimum entry for SP490E and SP491E. Update ES rating to IEC Update ordering information May 2013 Correct type errors per PCN February 2018 Updated to MaxLinear logo. emove GN from ifferential Output Voltage min (page 2 & 5). Update format and ordering information table. Added Pin Function section. emoved obsolete PIP from description, mechanical and mechanical drawings. Corporate Headquarters: 5966 La Place Court Suite 100 Carlsbad, CA Tel.:+1 (760) Fax: +1 (760) High Performance Analog: 1060 incon Circle San Jose, CA Tel.: +1 (669) Fax: +1 (669) serialtechsupport@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 MaxLinear, Inc. All rights reserved SP490E_SP491E_S_ /13

SP3490 / SP V Low Power Full-Duplex RS-485 Transceivers with 10Mbps Data Rate VCC 13 NC 12 2 A B A B REB DE 10 Z 5 D GND GND GND.

SP3490 / SP V Low Power Full-Duplex RS-485 Transceivers with 10Mbps Data Rate VCC 13 NC 12 2 A B A B REB DE 10 Z 5 D GND GND GND. 3.3V Low Power Full-uplex S-485 Transceivers with 10Mbps ata ate escription The SP3490 and SP3491 devices are 3.3V low power full-duplex transceivers that meet the specifications of the S-485 and S-4 serial