® SP3493/SP3494 +3.3V Low Power RS-485/RS-422 Transceivers ■ Operates From A Single +3.3V Supply ■ Interoperable With +5V Logic ■ +200mV Receiver Input Sensitivity ■ -7V to +12V Common-Mode Input Voltage Range ■ Devices Allow Up To 32 Transceivers On The Serial Bus ■ Driver/Receiver Enable Lines (SP3494) ■ 2nA Low-Power Shutdown Mode (SP3494) ■ Compatible With The MAX3488, LTC490 and 75179 Industry Standard Pinouts (SP3493) ■ Compatible With The MAX3486 and 75176 Industry Standard Pinouts (SP3494) DESCRIPTION The SP3493 and the 3494 devices are +3.3V, low power transceivers that meet the specifications of the RS-485 and RS-422 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 250kbps. The SP3494 is a half-duplex partially slew-rate limited transceiver that will deliver a data transmission rate up to 2.5Mbps. The SP3494 is equipped with a low-power shutdown mode and driver/receiver high-Z enable lines. Vcc 1 8 A R 2 R R 8 VCC RE 2 7 B DE 3 6 A 5 GND RO 1 7 B 6 Z D 3 D GND 4 5 Y D DI 4 SP3493 10/16/02 SP3494 SP3493/3494 +3.3V Low Power Slew-Rate Limited RS-485/RS-422 Transceivers 1 © Copyright 2002 Sipex Corporation ABSOLUTE MAXIMUM RATINGS 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. VCC ............................................................................................ +6.0V Input Voltages Drivers ........................................................................ -0.3V to +6.0V Receivers ................................................................................... ±14V Output Voltages Drivers ....................................................................................... ±14V Receivers .................................................................... -0.3V to +6.0V Storage Temperature ................................................. -65˚C to +150˚ Power Dissipation per Package 8-pin PDIP (derate11.8mW/oC above +70oC) ...................... 1000mW 8-pin NSOIC (derate 6.90mW/oC above +70oC) .................... 600mW SPECIFICATIONS TAMB = TMIN to TMAX and VCC = 3.3V ± 5% unless otherwise noted. PARAMETERS SP3493 DRIVER DC Characteristics Differential Output Voltage Differential Output Voltage Differential Output Voltage Change in Magnitude of Driver Differential Output Voltage for Complimentary States Driver Common-Mode Output Voltage Input High Voltage Input Low Voltage Input Current Driver Short-Circuit Current VOUT = HIGH VOUT = LOW MIN. TYP. MAX. UNITS CONDITIONS GND 2 VCC VCC Volts Volts 1.5 VCC Volts Unloaded; R = ∞ Ω; Figure 1 With Load; R = 50Ω; (RS-422); Figure 1 With Load; R = 27Ω; (RS-485); Figure 1 0.2 Volts R = 27Ω or R = 50Ω; Figure 1 3 R = 27Ω or R = 50Ω; Figure 1 0.8 +10 Volts Volts Volts µA +250 +250 mA mA -7V < VO < +12V -7V < VO < +12V 2.0 SP3493 DRIVER AC Characteristics Maximum Data Rate Driver Input to Output, tPLH 250 400 900 1500 kbps ns Figures 2 and 8 Driver Input to Output, tPHL 400 900 1500 ns Figures 2 and 8 ns tPHL(Y) - tPLH(Y) , tPHL(Z) - tPLH(Z) , Figures 2 and 8 Figures 2 and 8 From 10% to 90%; Figures 3 and 9 Differential Driver Skew 10 Driver Rise or Fall Time 10 SP3493 RECEIVER DC Characteristics Differential Input Threshold 0.2 Input Hysteresis Output Voltage High VCC-0.4 Output Voltage Low Input Resistance 12 Input Current (A, B); VIN = 12V Input Current (A, B); VIN = -7V Short-Circuit Current 10/16/02 30 ns +0.2 Volts mV Volts Volts kΩ mA mA mA 25 0.4 15 1.0 -0.8 60 -7V < VCM < 12V VCM = 0V IO = -1.5mA, VID = +200mV IO = +2.5mA, VID = -200mV -7V < VCM < 12V VIN = 12V VIN = -7V 0V < VO < VCC SP3493/3494 +3.3V Low Power Slew-Rate Limited RS-485/RS-422 Transceivers 2 © Copyright 2002 Sipex Corporation SPECIFICATIONS (continued) TAMB = TMIN to TMAX and VCC = 3.3V ± 5% unless otherwise noted. PARAMETERS SP3493 RECEIVER AC Characteristics Maximum Data Rate Receiver Input to Output, tPLH MIN. TYP. MAX. UNITS 250 35 70 120 kbps ns Figures 6 and 11 Receiver Input to Output, tPHL 35 70 120 ns Figures 6 and 11 ns Figures 6 and 11 2000 µA D = 0 or VCC VCC VCC Volts Volts Unloaded; R = ∞; Figure 1 with load; R = 50Ω; (RS-422); Figure 1 VCC Volts with load; R = 27Ω; (RS-485); Figure 1 0.2 Volts R = 27Ω or R = 50Ω; Figure 1 3 0.8 +10 Volts Volts Volts µA R = 27Ω or R = 50Ω; Figure 1 Applies to DE, DI, RE Applies to DE, DI, RE Applies to DE, DI, RE +250 +250 mA mA Differential Receiver Skew 10 SP3493 POWER REQUIREMENTS Supply Current SP3494 DRIVER DC Characteristics Differential Output Voltage GND Differential Output Voltage 2 1000 CONDITIONS Differential Output Voltage Change in Magnitude of Driver Differential Output Voltage for Complimentary States Driver Common-Mode Output Voltage Input High Voltage Input Low Voltage Input Current Driver Short-Circuit Current VOUT = HIGH VOUT = LOW SP3494 DRIVER AC Characteristics Maximum Data Rate 1.5 Driver Input to Output, tPLH 20 45 75 ns Figures 2 and 8 Driver Input to Output, tPHL 20 45 75 ns Figures 2 and 8 10 30 52 60 40 60 70 120 120 120 120 ns ns ns ns ns ns tDO1 - tDO2 , Figures 2 and 9 From 10% to 90%, Figures 3 and 9 Figures 4 and 10 Figures 5 and 10 Figures 5 and 10 Figures 4 and 10 2.0 2.5 Differential Driver Skew Driver Rise or Fall Time Driver Enable to Output High Driver Enable to Output Low Driver Disable Time from Low Driver Disable Time from High SP3494 RECEIVER DC Characteristics Differential Input Threshold -0.2 Input Hysteresis Output Voltage High VCC-0.4 Output Voltage Low Three-State (High Impedance) Output Current Input Resistance 12 Input Current (A, B); VIN = 12V Input Current (A, B); VIN = -7V Short-Circuit Current 7 10/16/02 Mbps +0.2 20 0.4 +1 15 1.0 -0.8 60 Volts mV Volts Volts µA kΩ mA mA mA -7V < VO < +12V -7V < VO < +12V RE = VCC, DE = VCC -7V < VCM < +12V VCM = 0V VID = +200mV, -1.5mA VID = -200mV, 2.5mA 0V < VO < VCC; RE = VCC -7V < VCM < +12V DE = 0V, VCC = 0V or 3.6V, VIN = 12V DE = 0V, VCC = 0V or 3.6V, VIN = -7V 0V < VCM < VCC SP3493/3494 +3.3V Low Power Slew-Rate Limited RS-485/RS-422 Transceivers 3 © Copyright 2002 Sipex Corporation SPECIFICATIONS (continued) TAMB = TMIN to TMAX and VCC = +3.3V ± 5% unless otherwise noted. PARAMETERS SP3494 RECEIVER MIN. TYP. MAX. UNITS AC Characteristics Maximum Data Rate Receiver Input to Output, tPLH 2.5 40 70 100 Mbps ns RE = 0V, DE = 0V Figures 6 and 11 Receiver Input to Output, tPHL 40 70 100 ns Figures 6 and 11 ns tRSKEW = tRPHL - tRPLH , Figures 6 and 11 Differential Receiver Skew Receiver Enable to Output Low Receiver Enable to Output High Receiver Disable from Low Receiver Disable from High SP3494 SHUTDOWN TIMING Time to Shutdown Driver Enable from Shutdown to Output High Driver Enable from Shutdown to Output Low Receiver Enable from Shutdown to Output High Receiver Enable from Shutdown to Output Low 10 50 SP3494 POWER REQUIREMENTS Supply Current No Load Shutdown Mode 10/16/02 CONDITIONS 35 60 ns Figures 7 and 12; S1 closed, S2 open 35 35 35 60 60 60 ns ns ns Figures 7 and 12; S2 closed, S1 open Figures 7 and 12; S1 closed, S2 open Figures 7 and 12; S2 closed, S1 open 75 200 ns RE = 3.3V, DE = 0V 65 150 ns Figures 4 and 10 65 150 ns Figures 5 and 10 50 200 ns Figures 7 and 12; S2 closed, S1 open 50 200 ns Figures 7 and 12; S1 closed, S2 open 1000 800 2000 1500 µA µA RE, DI = 0V or VCC; DE = VCC RE = 0V, DI = 0V or VCC; DE = 0V 10 µA DE = 0V, RE=VCC SP3493/3494 +3.3V Low Power Slew-Rate Limited RS-485/RS-422 Transceivers 4 © Copyright 2002 Sipex Corporation PIN FUNCTION - SP3493 Vcc 1 Pin 1 - VCC - Positive supply +3.00 < VCC < +3.60 Pin 2 - R - Receiver output. Pin 3 - D - Driver input. Pin 4 - GND - 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. 8 A R 2 R 7 B 6 Z D 3 D 5 Y GND 4 SP3493 Pinout PIN FUNCTION - SP3494 Pin 1 – RO – Receiver Output. R 8 VCC RE 2 7 B DE 3 6 A RO 1 Pin 2 – RE – Receiver Output Enable Active LOW. Pin 3 – DE – Driver Output Enable Active HIGH. Pin 4 – DI – Driver Input. Pin 5 – GND – Ground Connection. Pin 6 – A – Driver Output/Receiver Input Non-inverting. D DI 4 5 GND Pin 7 – B – Driver Output/Receiver Input Inverting. Pin 8 – Vcc – Positive Supply +3.00V < VCC < +3.60V SP3494 Pinout 10/16/02 SP3493/3494 +3.3V Low Power Slew-Rate Limited RS-485/RS-422 Transceivers 5 © Copyright 2002 Sipex Corporation The SP3493/SP3494 drivers will operate up to 250kbps and 2.5Mbps, respectively. In addition to adhering to the 250mA ISC maximum limit on the driver output, the driver output short-circuit protection will allow the devices to withstand an infinite short circuit over the -7.0V to +12V common mode range without damage. DESCRIPTION The SP3493/3494 are +3.3V transceivers that meet the electrical specifications of the RS-485 and RS-422 serial protocols. The SP3493/3494 feature Sipex's BiCMOS process allowing low power operation without sacrificing performance. Receivers The SP3493 device is a +3.3V 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 75179. The SP3493 has a driver with a data transmission rate of 250kbps. The receivers have differential inputs with an input sensitivity as low +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. 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 device is a +3.3V 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 75176. The SP3494 has a partially slewrate limited driver with a data transmission rate of 2.5Mbps. The SP3494 receiver has a high impedance (high-Z) enable control pin. A logic LOW on RE (pin 2) will enable the receiver; a logic HIGH on RE (pin 2) will disable the receiver. Drivers 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 DE (pin 3) and a logic HIGH on RE (pin 2) will put the SP3494 into shutdown. In shutdown, the supply current will drop to 2nA typical, 1µA maximum. The SP3493/3494devices both have differential outputs. The typical voltage output swing with no load will bo 0V to VCC. With worst case loading of 54Ω across the differential outputs, the driver can maintain greater than 1.5V voltage levels. The SP3494 device has 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 DE (pin 3) will force the driver outputs at high impedance (high-Z). The SP3493 device does not have a driver enable. 10/16/02 SP3493/3494 +3.3V Low Power Slew-Rate Limited RS-485/RS-422 Transceivers 6 © Copyright 2002 Sipex Corporation VDM R RL = 27Ω S1 VOD D D GENERATOR (NOTE 1) R 50Ω VOC VCC OUT CL = 15pF (NOTE 2) VCC VOM = VOH + VOL 2 Figure 1. Driver DC Test Load Circuit 1.5V Figure 2. Driver Propagation Delay Test Circuit S1 D CL RL = 60Ω D GENERATOR (NOTE 1) OUT OUT RL = 110Ω CL = 50pF (NOTE 2) GENERATOR (NOTE 1) 50Ω VCC 50Ω CL = 15pF (NOTE 2) VOM = VOH + VOL 2 Figure 3. Driver Differential Output Delay and Transition Time Circuit 1.5V Figure 4. Driver Enable and Disable Timing Circuit, output HiGH VCC RL = 110Ω VID S1 0V OR 3V D GENERATOR (NOTE 1) OUT R OUT 50Ω CL = 15pF (NOTE 2) CL = 50pF (NOTE 2) GENERATOR (NOTE 1) 50Ω 1.5V VOM = VCC 2 0V Figure 6. Receiver Propagation Delay Test Circuit Figure 5. Driver Enable and Disable Timing Circuit, Output LOW S1 S3 1.5V VCC 1k -1.5V VID R S2 CL = 15pF (NOTE 2) GENERATOR (NOTE 1) 50Ω Figure 7. Receiver Enable and Disable Timing Circuit INPUTS RE X X X DE 1 1 0 OUTPUTS DI 1 0 X LINE CONDITION No Fault No Fault X B 0 1 Z INPUTS RE DE 0 0 0 0 0 0 1 0 A 1 0 Z Table 1. Transmit Function Truth Table 10/16/02 A-B +0.2V -0.2V Inputs Open X OUTPUTS R 1 0 1 Z Table 2. Receive Function Truth Table SP3493/3494 +3.3V Low Power Slew-Rate Limited RS-485/RS-422 Transceivers 7 © Copyright 2002 Sipex Corporation 3V 1.5V 1.5V INPUT 3V 0V VOH tPLH IN tPHL 1.5V 1.5V 0V VOM VOM Y OUTPUT tDO1 tDO2 VOL tPHL tPLH VOH Z OUTPUT OUT VOM VOM 2.0V 90% 90% 50% 10% 50% 10% -2.0V VOL tTD tTD VOM = VOH + VOL ≈ 1.5V 2 Figure 9. Driver Differential Output Delay and Transition Time Waveforms Figure 8. Driver Propagation Delay Waveforms 3V 1.5V 1.5V DE 0V VOH OUTPUT HIGH 3V tPHZ tPZH INPUT 0.25V VOM 0V VCC 1.5V 1.5V tRPLH tRPHL 0V VCC tPZL OUTPUT tPLZ OUTPUT LOW VOM VOL VOM VOM 0V VOM = VCC 2 0.25V VOM = VOH + VOL ≈ 1.5V 2 Figure 10. Driver Enable and Disable Timing Waveforms Figure 11. Receiver Propagation Delay Waveforms S1 is open S2 is closed S3 = 1.5V S1 is closed S2 is open S3 = -1.5V 3V 3V 1.5V 1.5V RE 0V 0V tPRHZ VOH OUTPUT 1.5V 1.5V RE tPRZH tPRSH tPRLZ tPRZL tPRSL VCC 10% 1.5V OUTPUT 1.5V VOL 0V 10% Figure 12. Receiver Enable and Disable Waveforms NOTE 1: The input pulse is supplied by a generator with the following characteristics: PRR=250KHz, 50% duty cycle, tr < 6.0ns, Z0=50Ω. NOTE 2: CL includes probe and stray capacitance. 10/16/02 SP3493/3494 +3.3V Low Power Slew-Rate Limited RS-485/RS-422 Transceivers 8 © Copyright 2002 Sipex Corporation PACKAGE: PLASTIC DUAL–IN–LINE (NARROW) E1 E D1 = 0.005" min. (0.127 min.) A1 = 0.015" min. (0.381min.) D A = 0.210" max. (5.334 max). C A2 e = 0.100 BSC (2.540 BSC) B1 B Ø L eA = 0.300 BSC (7.620 BSC) ALTERNATE END PINS (BOTH ENDS) DIMENSIONS (Inches) Minimum/Maximum (mm) 10/16/02 8–PIN A2 0.115/0.195 (2.921/4.953) B 0.014/0.022 (0.356/0.559) B1 0.045/0.070 (1.143/1.778) C 0.008/0.014 (0.203/0.356) D 0.355/0.400 (9.017/10.160) E 0.300/0.325 (7.620/8.255) E1 0.240/0.280 (6.096/7.112) L 0.115/0.150 (2.921/3.810) Ø 0°/ 15° (0°/15°) SP3493/3494 +3.3V Low Power Slew-Rate Limited RS-485/RS-422 Transceivers 9 © Copyright 2002 Sipex Corporation PACKAGE: PLASTIC SMALL OUTLINE (SOIC) (NARROW) E H h x 45° D A Ø e B A1 L DIMENSIONS (Inches) Minimum/Maximum (mm) 10/16/02 8–PIN A 0.053/0.069 (1.346/1.748) A1 0.004/0.010 (0.102/0.249 B 0.014/0.019 (0.35/0.49) D 0.189/0.197 (4.80/5.00) E 0.150/0.157 (3.802/3.988) e 0.050 BSC (1.270 BSC) H 0.228/0.244 (5.801/6.198) h 0.010/0.020 (0.254/0.498) L 0.016/0.050 (0.406/1.270) Ø 0°/8° (0°/8°) SP3493/3494 +3.3V Low Power Slew-Rate Limited RS-485/RS-422 Transceivers 10 © Copyright 2002 Sipex Corporation ORDERING INFORMATION Model SP3493CN SP3493CP SP3493EN SP3493EP SP3494CN SP3494CP SP3494EN SP3494EP ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ Temperature Range 0˚C to +70˚C 0˚C to +70˚C .-40˚C to +85˚C -40˚C to +85˚C ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ 0˚C to +70˚C 0˚C to +70˚C -40˚C to +85˚C -40˚C to +85˚C ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ 8-pin Narrow SOIC 8-pin Plastic DIP 8-pin Narrow SOIC 8-pin Plastic DIP ○ ○ ○ Package 8-pin Narrow SOIC 8-pin Plastic DIP 8-pin Narrow SOIC 8-pin Plastic DIP ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ Please consult the factory for pricing and availability on a Tape-On-Reel option. Corporation SIGNAL PROCESSING EXCELLENCE Sipex Corporation Headquarters and Sales Office 233 South Hillview Drive Milpitas, CA 95035 TEL: (408) 934-7500 FAX: (408) 935-7600 Sales Office 22 Linnell Circle Billerica, MA 01821 TEL: (978) 667-8700 FAX: (978) 670-9001 e-mail: [email protected] 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. 10/16/02 SP3493/3494 +3.3V Low Power Slew-Rate Limited RS-485/RS-422 Transceivers 11 © Copyright 2002 Sipex Corporation