SP3493/SP V Low Power RS-485/RS-422 Transceivers. Now Available in Lead-Free Packaging

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Trevor Banks
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1 SP3493/SP3494 Operates From A Single +3. Supply Interoperable With +5V Logic +00mV eceiver Input Sensitivity -7V to +1V Common-Mode Input Voltage ange evices Allow Up To 3 Transceivers On The Serial Bus river/eceiver Enable Lines (SP3494) na Low-Power Shutdown Mode (SP3494) Compatible With The MAX3488, LTC490 and Industry Standard Pinouts (SP3493) Compatible With The MAX3486 and Industry Standard Pinouts (SP3494) +3. Low Power S-485/S-4 Transceivers Now Available in Lead-Free Packaging ESCIPTION The SP3493 and the 3494 devices are +3., low power transceivers that meet the specifications of the S-485 and S-4 serial protocols. The SP3493 and the 3494 devices are pin-to-pin compatible with the Sipex SP3490 and the SP3481 devices, respectively, as well as other popular industry standards. The devices feature Sipex's BiCMOS process, allowing low power operation without sacrificing performance. The partially slew-rate limited drivers minimize EMI and reduce reflections caused by improperly terminated cables allowing error-free data transmission. The SP3493 is a full-duplex low power transceiver that will deliver a data transmission rate up to 50kbps. The SP3494 is a half-duplex partially slew-rate limited transceiver that will deliver a data transmission rate up to.5mbps. The SP3494 is equipped with a low-power shutdown mode and driver/receiver high-z enable lines. Vcc 1 3 GN 4 8 A 7 B 6 Z 5 Y O 1 E E 3 I 4 8 V CC 7 B 6 A 5 GN SP3493 SP /16/0 SP3493/ Low Power Slew-ate Limited S-485/S-4 Transceivers Copyright 00 Sipex Corporation 1

2 ABSOLUTE MAXIMUM ATINGS 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 Input Voltages rivers to +6. eceivers... ±14V Output Voltages rivers... ±14V eceivers to +6. Storage Temperature C to +150 Power issipation per Package 8-pin PIP (derate11.8mw/ o C above +70 o C) mW 8-pin NSOIC (derate 6.90mW/ o C above +70 o C) mW SPECIFICATIONS T AMB = T MIN to T MAX and V CC = 3. ± 5% unless otherwise noted. PAAMETES MIN. TYP. MAX. UNITS CONITIONS SP3493 IVE C Characteristics ifferential Output Voltage GN V CC Volts Unloaded; = Ω; Figure 1 ifferential Output Voltage V CC Volts With Load; = ; (S-4); Figure 1 ifferential Output Voltage 1.5 V CC Volts With Load; = 7Ω; (S-485); Figure 1 Change in Magnitude of river ifferential Output Voltage for Complimentary States 0. Volts = 7Ω or = ; Figure 1 river Common-Mode Output Voltage 3 Volts = 7Ω or = ; Figure 1 Input High Voltage.0 Volts Input Low Voltage 0.8 Volts Input Current +10 µa river Short-Circuit Current V = HIGH +50 ma -7V < V O V = LOW +50 ma -7V < V O SP3493 IVE AC Characteristics Maximum ata ate 50 kbps river Input to Output, t PLH ns Figures and 8 river Input to Output, t PHL ns Figures and 8 ifferential river Skew 10 ns t PHL (Y) - t PLH (Y), t PHL (Z) - t PLH (Z), Figures and 8 Figures and 8 river ise or Fall Time ns From 10% to 90%; Figures 3 and 9 SP3493 ECEIVE C Characteristics ifferential Input Threshold Volts -7V < V CM < 1V Input Hysteresis 5 mv V CM = Output Voltage High V CC -0.4 Volts I O = -1.5mA, V I = +00mV Output Voltage Low 0.4 Volts I O = +.5mA, V I = -00mV Input esistance 1 15 kω -7V < V CM < 1V Input Current (A, B); V IN = 1V 1.0 ma V IN = 1V Input Current (A, B); V IN = -7V -0.8 ma V IN = -7V Short-Circuit Current 60 ma < V O < V CC 10/16/0 SP3493/ Low Power Slew-ate Limited S-485/S-4 Transceivers Copyright 00 Sipex Corporation

3 SPECIFICATIONS (continued) T AMB = T MIN to T MAX and V CC = 3. ± 5% unless otherwise noted. PAAMETES MIN. TYP. MAX. UNITS CONITIONS SP3493 ECEIVE AC Characteristics Maximum ata ate 50 kbps eceiver Input to Output, t PLH ns Figures 6 and 11 eceiver Input to Output, t PHL ns Figures 6 and 11 ifferential eceiver Skew 10 ns Figures 6 and 11 SP3493 POWE EQUIEMENTS Supply Current µa = 0 or V CC SP3494 IVE C Characteristics ifferential Output Voltage GN V CC Volts Unloaded; = ; Figure 1 ifferential Output Voltage V CC Volts with load; = ; (S-4); Figure 1 ifferential Output Voltage 1.5 V CC Volts with load; = 7Ω; (S-485); Figure 1 Change in Magnitude of river ifferential Output Voltage for Complimentary States 0. Volts = 7Ω or = ; Figure 1 river Common-Mode Output Voltage 3 Volts = 7Ω or = ; Figure 1 Input High Voltage.0 Volts Applies to E, I, E Input Low Voltage 0.8 Volts Applies to E, I, E Input Current +10 µa Applies to E, I, E river Short-Circuit Current V = HIGH +50 ma -7V < V O V = LOW +50 ma -7V < V O SP3494 IVE AC Characteristics Maximum ata ate.5 Mbps E = V CC, E = V CC river Input to Output, t PLH ns Figures and 8 river Input to Output, t PHL ns Figures and 8 ifferential river Skew 10 ns t O1 - t O, Figures and 9 river ise or Fall Time ns From 10% to 90%, Figures 3 and 9 river Enable to Output High 5 10 ns Figures 4 and 10 river Enable to Output Low ns Figures 5 and 10 river isable Time from Low ns Figures 5 and 10 river isable Time from High ns Figures 4 and 10 SP3494 ECEIVE C Characteristics ifferential Input Threshold Volts -7V < V CM Input Hysteresis 0 mv V CM = Output Voltage High V CC -0.4 Volts V I = +00mV, -1.5mA Output Voltage Low 0.4 Volts V I = -00mV,.5mA Three-State (High Impedance) Output Current +1 µa < V O < V CC ; E = V CC Input esistance 1 15 kω -7V < V CM Input Current (A, B); V IN = 1V 1.0 ma E =, V CC = or 3.6V, V IN = 1V Input Current (A, B); V IN = -7V -0.8 ma E =, V CC = or 3.6V, V IN = -7V Short-Circuit Current 7 60 ma < V CM < V CC 10/16/0 SP3493/ Low Power Slew-ate Limited S-485/S-4 Transceivers Copyright 00 Sipex Corporation 3

4 SPECIFICATIONS (continued) T AMB = T MIN to T MAX and V CC = +3. ± 5% unless otherwise noted. PAAMETES MIN. TYP. MAX. UNITS CONITIONS SP3494 ECEIVE AC Characteristics Maximum ata ate.5 Mbps E =, E = eceiver Input to Output, t PLH ns Figures 6 and 11 eceiver Input to Output, t PHL ns Figures 6 and 11 ifferential eceiver Skew 10 ns t SKEW = t PHL - t PLH, Figures 6 and 11 eceiver Enable to Output Low ns Figures 7 and 1; S 1 closed, S eceiver Enable to Output High ns Figures 7 and 1; S closed, S 1 eceiver isable from Low ns Figures 7 and 1; S 1 closed, S eceiver isable from High ns Figures 7 and 1; S closed, S 1 SP3494 SHUTOWN TIMING Time to Shutdown ns E = 3., E = river Enable from Shutdown to Output High ns Figures 4 and 10 river Enable from Shutdown to Output Low ns Figures 5 and 10 eceiver Enable from Shutdown to Output High ns Figures 7 and 1; S closed, S 1 eceiver Enable from Shutdown to Output Low ns Figures 7 and 1; S 1 closed, S SP3494 POWE EQUIEMENTS Supply Current No Load µa E, I = or V CC ; E = V CC µa E =, I = or V CC ; E = Shutdown Mode 10 µa E =, E=V CC 10/16/0 SP3493/ Low Power Slew-ate Limited S-485/S-4 Transceivers Copyright 00 Sipex Corporation 4

5 PIN FUNCTION - SP3493 Vcc 1 3 GN A B Z Y Pin 1 - V CC - Positive supply < V CC < Pin - - eceiver output. Pin river input. Pin 4 - GN - Ground connection. Pin 5 - Y - Non-inverting driver output. Pin 6 - Z - Inverting driver output. Pin 7 - B - Inverting receiver input. Pin 8 - A - Non-inverting receiver input. SP3493 Pinout PIN FUNCTION - SP3494 Pin 1 O eceiver Output. O 1 8 V CC Pin E eceiver Output Enable Active LOW. Pin 3 E river Output Enable Active HIGH. E 7 B Pin 4 I river Input. E 3 I 4 6 A 5 GN Pin 5 GN Ground Connection. Pin 6 A river Output/eceiver Input Non-inverting. Pin 7 B river Output/eceiver Input Inverting. Pin 8 Vcc Positive Supply +3.0 < V CC < +3.6 SP3494 Pinout 10/16/0 SP3493/ Low Power Slew-ate Limited S-485/S-4 Transceivers Copyright 00 Sipex Corporation 5

6 ESCIPTION The SP3493/3494 are +3. transceivers that meet the electrical specifications of the S-485 and S-4 serial protocols. The SP3493/3494 feature Sipex's BiCMOS process allowing low power operation without sacrificing performance. The SP3493 device is a +3. full-duplex transceiver that is pin-to-pin compatible with the Sipex SP3490 and SP490 devices as well as popular industry standards such as the MAX3488, the LTC490, and the The SP3493 has a driver with a data transmission rate of 50kbps. The SP3494 device is a +3. half-duplex transceiver that is pin-to-pin compatible with the Sipex SP3481 and SP481 devices as well as popular industry standards such as the MAX3486 and the The SP3494 has a partially slewrate limited driver with a data transmission rate of.5mbps. rivers The SP3493/3494devices both have differential outputs. The typical voltage output swing with no load will bo to V CC. With worst case loading of 54Ω across the differential outputs, the driver can maintain greater than voltage levels. The SP3494 device has an enable control line which is active HIGH. A logic HIGH on E (pin 3) will enable the differential driver outputs. A logic LOW on E (pin 3) will force the driver outputs at high impedance (high-z). The SP3493 device does not have a driver enable. The SP3493/SP3494 drivers will operate up to 50kbps and.5mbps, respectively. In addition to adhering to the 50mA I SC maximum limit on the driver output, the driver output short-circuit protection will allow the devices to withstand an infinite short circuit over the -7. to +1V common mode range without damage. eceivers The receivers have differential inputs with an input sensitivity as low +00mV. Input impedance of the receivers is typically 15kΩ (1kΩ minimum). A wide common mode range of -7V to +1V allows for large ground potential differences between systems. Both the SP3493/SP3494 receivers are equipped with fail-safe which guarantees that the receiver outputs will be in a high state when the input is left unconnected. The SP3494 receiver has a high impedance (high-z) enable control pin. A logic LOW on E (pin ) will enable the receiver; a logic HIGH on E (pin ) will disable the receiver. The SP3494 is equipped with a shutdown mode. To enable the shutdown state, both the driver and receiver must be disabled simultaneously. A logic LOW on E (pin 3) and a logic HIGH on E (pin ) will put the SP3494 into shutdown. In shutdown, the supply current will drop to na typical, 1µA maximum. 10/16/0 SP3493/ Low Power Slew-ate Limited S-485/S-4 Transceivers Copyright 00 Sipex Corporation 6

7 VM L = 7Ω S1 VO VOC GENEATO CL = 15pF (NOTE ) = + VOL Figure 1. river C Test Load Circuit Figure. river Propagation elay Test Circuit S1 GENEATO CL L = 60Ω GENEATO CL = 50pF (NOTE ) L = 110Ω CL = 15pF (NOTE ) = + VOL Figure 3. river ifferential Output elay and Transition Time Circuit Figure 4. river Enable and isable Timing Circuit, output HiGH O GENEATO S1 CL = 50pF (NOTE ) L = 110Ω GENEATO VI CL = 15pF (NOTE ) = Figure 5. river Enable and isable Timing Circuit, Output LOW Figure 6. eceiver Propagation elay Test Circuit S3 1k S1 - VI S CL = 15pF (NOTE ) GENEATO Figure 7. eceiver Enable and isable Timing Circuit INPUTS PUTS LINE E E I CONITION 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 PUTS E E A - B V V Inputs Open X Z Table. eceive Function Truth Table 10/16/0 SP3493/ Low Power Slew-ate Limited S-485/S-4 Transceivers Copyright 00 Sipex Corporation 7

8 INPUT Y PUT tplh tphl IN to1 to VOL Z PUT VOL = tphl + VOL tplh tt 90% 90% 50% 50% 10% 10% tt. -. Figure 8. river Propagation elay Waveforms Figure 9. river ifferential Output elay and Transition Time Waveforms E PUT HIGH tpzh tphz 0.5V INPUT tplh tphl PUT PUT LOW VOL tpzl tplz 0.5V = = + VOL Figure 10. river Enable and isable Timing Waveforms Figure 11. eceiver Propagation elay Waveforms E PUT S1 is S is closed S3 = tphz 10% tpzh tpsh E PUT VOL S1 is closed S is S3 = - 10% tplz tpzl tpsl Figure 1. eceiver Enable and isable Waveforms NOTE 1: The input pulse is supplied by a generator with the following characteristics: P=50KHz, 50% duty cycle, t r < 6.0ns, Z 0 =. NOTE : C L includes probe and stray capacitance. 10/16/0 SP3493/ Low Power Slew-ate Limited S-485/S-4 Transceivers Copyright 00 Sipex Corporation 8

9 PACKAGE: PLASTIC UAL IN LINE (NAOW) E1 E 1 = 0.005" min. (0.17 min.) A1 = 0.015" min. (0.381min.) A = 0.10" max. (5.334 max). e = BSC (.540 BSC) B1 B ALTENATE EN PINS (BOTH ENS) L A Ø C e A = BSC (7.60 BSC) IMENSIONS (Inches) Minimum/Maximum (mm) A B B1 C E E1 L Ø 8 PIN 0.115/0.195 (.91/4.953) 0.014/0.0 (0.356/0.559) 0.045/0.070 (1.143/1.778) 0.008/0.014 (0.03/0.356) 0.355/0.400 (9.017/10.160) 0.300/0.35 (7.60/8.55) 0.40/0.80 (6.096/7.11) 0.115/0.150 (.91/3.810) 0 / 15 (0 /15 ) 10/16/0 SP3493/ Low Power Slew-ate Limited S-485/S-4 Transceivers Copyright 00 Sipex Corporation 9

10 PACKAGE: PLASTIC SMALL LINE (SOIC) (NAOW) E H h x 45 A Ø e B A1 L IMENSIONS (Inches) Minimum/Maximum (mm) A A1 B E e H h L Ø 8 PIN 0.053/0.069 (1.346/1.748) 0.004/0.010 (0.10/ /0.019 (0.35/0.49) 0.189/0.197 (4.80/5.00) 0.150/0.157 (3.80/3.988) BSC (1.70 BSC) 0.8/0.44 (5.801/6.198) 0.010/0.00 (0.54/0.498) 0.016/0.050 (0.406/1.70) 0 /8 (0 /8 ) 10/16/0 SP3493/ Low Power Slew-ate Limited S-485/S-4 Transceivers Copyright 00 Sipex Corporation 10

11 OEING INFOMATION Model Temperature ange Package SP3493CN 0 C to +70 C 8-pin Narrow SOIC SP3493CP 0 C to +70 C 8-pin Plastic IP SP3493EN.-40 C to +85 C 8-pin Narrow SOIC SP3493EP -40 C to +85 C 8-pin Plastic IP SP3494CN 0 C to +70 C 8-pin Narrow SOIC SP3494CP 0 C to +70 C 8-pin Plastic IP SP3494EN -40 C to +85 C 8-pin Narrow SOIC SP3494EP -40 C to +85 C 8-pin Plastic IP Please consult the factory for pricing and availability on a Tape-On-eel option. Available in lead-free packaging. To order add -L suffix to part number. Example: SP3493CN = standard; SP3493CN-L = lead-free. Corporation SIGNAL POCESSING EXCELLENCE Sipex Corporation Headquarters and Sales Office 33 South Hillview rive Milpitas, CA TEL: (408) FAX: (408) Sales Office Linnell Circle Billerica, MA 0181 TEL: (978) FAX: (978) sales@sipex.com Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of the application or use of any product or circuit described hereing; neither does it convey any license under its patent rights nor the rights of others. 10/16/0 SP3493/ Low Power Slew-ate Limited S-485/S-4 Transceivers Copyright 00 Sipex Corporation 11

SP V Low Power RS-485/RS-422 Transceiver RO 1 VCC RE 2 DE 3 DI 4 GND. Description. Block Diagram

SP V Low Power RS-485/RS-422 Transceiver RO 1 VCC RE 2 DE 3 DI 4 GND. Description. Block Diagram 3. Low Power S-485/S-4 Transceiver escription The SP3494 device is a 3. low power half-duplex transceiver that meets the specifications of the S-485 and S-4 serial protocols. This device is pin-to-pin