SP1490E/SP1491E. Full Duplex RS-485 Transceivers SP1491E. 8 Pin - nsoic. description
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1 SP49E/SP49E Full Duplex S-485 Transceivers features +5V Only Low Power icmos Driver/eceiver Enable (SP49E) S-485 and S-422 Drivers/eceivers Pin Compatible with SN7579 (SP49E) Pin Compatible with SN758 (SP49E) Improved ESD Specifications ±5kV Human ody Model ±5kV IEC-4-2 ir Discharge ±8kV IEC-4-2 Contact Discharge PPLICTIONS Industial Networks Motor Control HVC/ uilding Control Telecom description The SP49E is a low power differential line driver/receiver meeting S-485 and S-422 standards up to 2Mbps. The SP49E is identical to the SP49E with the addition of driver and receiver tristate enable lines. oth products feature ±2mV receiver input sensitivity, over wide common mode range. The SP49E is available in an 8-pin NSOIC packages for operation over the commercial and industrial temperature ranges. The SP49E is available in a 4-pin NSOIC packages for operation over the commercial and industrial temperature ranges. V CC O DI GND 2 3 SP49E 8 Pin - nsoic Z Y LOCK DIGM Vcc O 2 DI 3 GND 4 D Z 5 Y NC 4 Vcc 3 NC 2 O 2 E DE 3 4 Z DI 5 D GND 6 9 Y GND 7 8 NC SP49E SP49E Exar Corporation 4872 Kato oad, Fremont C, SP49_SP49E 629
2 SOLUTE MXIMUM TINGS 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...+7V Input Voltages Drivers...-.5V to (V CC +.5V) eceivers...±4v Output Voltages Drivers...±4V eceivers...-.5v to (V CC +.5V) Storage Temperature C to +5 Power Dissipation...mW T MIN to T MX and V CC = 5V ± 5% unless otherwise noted. PMETES MIN. TYP. MX. UNITS CONDITIONS ELECTICL CHCTEISTICS SP49E/49E driver DC Characteristics Differential Output Voltage 3.5 V CC Volts Unloaded; = ; see figure Differential Output Voltage 2 V CC Volts With Load; = 5Ω; (S422); see figure Differential Output Voltage.5 V CC Volts With Load; = 27Ω; (S485); see figure Change in Magnitude of Driver Differential Output Voltage for Complimentary States.2 Volts = 27Ω or = 5Ω; see figure Driver Common-Mode Output Voltage 3 Volts = 27Ω or = 5Ω; see figure Input High Voltage 2. Volts pplies to D Input Low Voltage.8 Volts pplies to D Input Current ± μ pplies to D Driver Short-Circuit Current V OUT = HIGH ±25 m 7V V O +2V V OUT = LOW ±25 m 7V V O +2V SP49E/49E driver C Characteristics Maximum Data ate 2 Mbps Driver Input to Output 3 4 ns t /F ; DIFF = 54Ω, C L = pf; see figures 3 and 6 Driver Input to Output 3 4 ns t /F ; DIFF = 54Ω, C L = pf; see figures 3 and 6 Driver Skew 5 ns see figures 3 and 6, t /F = t PLH - t PHL Driver ise or Fall Time 8 2 ns From % to 9%; DIFF = 54Ω, SP49E only C L = pf; see figures 3 and 6 t /F Driver Enable to Output High 2 7 ns C L = pf; see figures 4 and 7; S 2 closed Driver Enable to Output Low 4 7 ns C L = pf; see figures 4 and 7; S closed Driver Disable Time from Low 4 7 ns C L = pf; see figures 4 and 7; S closed Driver Disable Time from High 4 7 ns C L = pf; see figures 4 and 7; S 2 closed Exar Corporation 4872 Kato oad, Fremont C, SP49_SP49E 629
3 T MIN to T MX and V CC = 5V ± 5% unless otherwise noted. SPECIFICTIONS (continued) SP49E/49E ECEIVE DC Characteristics Differential Input Threshold Volts 7V V CM 2V Input Hysteresis 7 mv V CM = V Output Voltage High 3.5 Volts I O = 4m, V ID = +2mV Output Voltage Low.4 Volts I O = +4m, V ID = 2mV Input esistance 2 5 kω 7V V CM 2V ( unit load) Input Current (, ); V IN = 2V ±. m V IN = 2V Input Current (, ); V IN = -7V -.8 m V IN = -7V Short-Circuit Current 85 m V V O V CC PMETES MIN. TYP. MX. UNITS CONDITIONS SP49E/49E ECEIver C Characteristics Maximum Data ate 2 Mbps eceiver Input to Output ns t PLH ; DIFF = 54Ω, C L = pf; Figures 3 & 8 eceiver Input to Output ns t PHL ; DIFF = 54Ω, = C L pf; Figures 3 & 8 Diff. eceiver Skew It PLH -t PHL I 5 ns DIFF = 54Ω; C L = pf; eceiver Tplh/Tphl 4 7 ns POWE EQUIEMENTS Supply Voltage Volts Supply Current 9 μ environmental and mechanical Operating Temperature Commercial (_C_) +7 C Industrial (_E_) C Storage Temperature C eceiver Test Point Output S K V CC V OD C L K V OC S 2 Figure. Driver DC Test Load Circuit Figure 2. eceiver Timing Test Load Circuit 3V DE DI C L DIFF O Output Under 5 C L2 5pF Test C L S V CC S 2 Figure 3. Driver/eceiver Timing Test Circuit Figure 4. Driver Timing Test Load #2 Circuit Exar Corporation 4872 Kato oad, Fremont C, SP49_SP49E 629
4 DI DIVE OUTPUT DIFFEENTIL OUTPUT V V +3V V V O + V V O f = MHz; t < ns; t F < ns.5v.5v t PLH t PHL V /2V O O t SKEW t t PLH /2V O t SKEW t F Figure 6. Driver Propagation Delays +3V f = MHz; t < ns; t F < ns DE.5V.5V V t ZL t LZ 5V, 2.3V V OL Output normally LOW.5V, V OH V 2.3V t ZH Output normally HIGH.5V t HZ Figure 7. Driver Enable and Disable Times SP49E only f = MHz; t ns; t F ns V D2 + V D2 V INPUT V V OH.5V OUTPUT.5V V OL t PHL t PHL Figure 8. eceiver Propagation Delays Exar Corporation 4872 Kato oad, Fremont C, SP49_SP49E 629
5 The SP49E and SP49E are full-duplex differential transceivers that meet the requirements of S-485 and S-422. Fabricated with a Exar proprietary icmos 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, feet, S-485 transceivers are equipped with a wide (-7V to +2V) common mode range to accommodate ground potential differences. ecause S-485 is a differential interface, data is virtually immune to noise in the transmission line. Driver... The drivers for both the SP49E and SP49E have differential outputs. The typical voltage output swing with no load will be volts to +5 volts. With worst case loading of 54Ω across the differential outputs, the driver can maintain greater than.5v voltage levels. logic low on DE (pin 4) of the SP49E will tri-state the driver outputs. The SP49E does not have a driver enable. eceiver... DETILED DESCIPTION The receivers for both the SP49E and SP49E have differential inputs with an input sensitivity as low as ±2mV. Input impedance of the receivers is typically 5KΩ (2KΩ minimum). wide common mode range of -7V to +2V allows for large ground potential differences between systems. The receivers for both the SP49E and SP49E 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 receiver of the SP49E has a receiver enable control line which is active low. logic low on E (pin 3) of the SP49E will enable the differential receiver. logic high on E (pin 3) of the SP49E will tri-state the receiver. The driver of the SP49E has a driver enable control line which is active high. logic high on DE (pin 4) of the SP49E will enable the differential driver outputs. INPUTS OUTPUTS INPUTS OUTPUTS E SP49E only - DE SP49E only DI Y Z x z z +.2V -.2V open x z ecieve Function Truth Table Transmit Function Truth Table Exar Corporation 4872 Kato oad, Fremont C, SP49_SP49E 629
6 Package: 8 Pin nsoic Exar Corporation 4872 Kato oad, Fremont C, SP49_SP49E 629
7 Package: 4 Pin nsoic Exar Corporation 4872 Kato oad, Fremont C, SP49_SP49E 629
8 ODEING INFOMTION Part Number TopMark Temperature ange Package SP49ECN-L...49ECNYYWW... C to +7 C... 8-Pin NSOIC SP49ECN-L/T...49ECNYYWW... C to +7 C... 8-Pin NSOIC SP49EEN-L... SP49EENYYWW...-4 C to +85 C... 8-Pin NSOIC SP49EEN-L/T... SP49EENYYWW...-4 C to +85 C... 8-Pin NSOIC SP49ECN-L...SP49ECNYYWW... C to +7 C... 4-Pin NSOIC SP49ECN-L/T...SP49ECNYYWW... C to +7 C... 4-Pin NSOIC SP49EEN-L... SP49EENYYWW...-4 C to +85 C... 4-Pin NSOIC SP49EEN-L/T... SP49EENYYWW...-4 C to +85 C... 4-Pin NSOIC /T = Tape and eel Pack quantity is 25 for Narrow SOIC. DTE EVISION DESCIPTION 3/8/7 J Legacy Sipex Datasheet 6/2/9.. Convert to Exar format, update ordering information and change revision to.. Notice EX Corporation reserves the right to make changes to any products contained in this publication in order to improve design, performance or reliability. EX 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. EX 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 EX 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 EX Corporation is adequately protected under the circumstances. Copyright 29 EX Corporation Datasheet June 29 Send your Interface technical inquiry with technical details to: uarttechsupport@exar.com eproduction, in part or whole, without the prior written consent of EX Corporation is prohibited. Exar Corporation 4872 Kato oad, Fremont C, SP49_SP49E 629
9 Mouser Electronics uthorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Exar: SP49EEN-L SP49EEN-L SP49ECN-L
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