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| (R) 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 R2 8A R RO 1 R 8 VCC 7B RE 2 7 B 6Z D3 GND 4 D DE 3 6 A 5Y DI 4 D 5 GND SP3493 10/16/02 SP3493/3494 +3.3V Low Power Slew-Rate Limited RS-485/RS-422 Transceivers SP3494 (c) Copyright 2002 Sipex Corporation 1 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 ................................................. -65C 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 SP3493 DRIVER AC Characteristics Maximum Data Rate Driver Input to Output, tPLH Driver Input to Output, tPHL Differential Driver Skew Driver Rise or Fall Time MIN. TYP. MAX. UNITS CONDITIONS GND 2 1.5 VCC VCC VCC 0.2 3 Volts Volts Volts Volts Volts Volts Volts A mA mA Unloaded; R = ; Figure 1 With Load; R = 50; (RS-422); Figure 1 With Load; R = 27; (RS-485); Figure 1 R = 27 or R = 50; Figure 1 R = 27 or R = 50; Figure 1 2.0 0.8 +10 +250 +250 -7V < VO < +12V -7V < VO < +12V 250 400 400 900 900 10 10 1500 1500 kbps ns ns ns Figures 2 and 8 Figures 2 and 8 tPHL(Y) - tPLH(Y) , tPHL(Z) - tPLH(Z) , Figures 2 and 8 Figures 2 and 8 From 10% to 90%; Figures 3 and 9 30 ns 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 +0.2 25 0.4 15 1.0 -0.8 60 Volts mV Volts Volts k mA mA mA -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 10/16/02 SP3493/3494 +3.3V Low Power Slew-Rate Limited RS-485/RS-422 Transceivers (c) Copyright 2002 Sipex Corporation 2 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 Receiver Input to Output, tPHL Differential Receiver Skew MIN. TYP. MAX. UNITS CONDITIONS 250 35 35 70 70 10 1000 120 120 kbps ns ns ns Figures 6 and 11 Figures 6 and 11 Figures 6 and 11 D = 0 or VCC SP3493 POWER REQUIREMENTS Supply Current SP3494 DRIVER DC Characteristics Differential Output Voltage GND Differential Output Voltage 2 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 Driver Input to Output, tPLH Driver Input to Output, tPHL 1.5 2000 A VCC VCC VCC 0.2 3 Volts Volts Volts Volts Volts Volts Volts A mA mA Unloaded; R = ; Figure 1 with load; R = 50; (RS-422); Figure 1 with load; R = 27; (RS-485); Figure 1 R = 27 or R = 50; Figure 1 R = 27 or R = 50; Figure 1 Applies to DE, DI, RE Applies to DE, DI, RE Applies to DE, DI, RE -7V < VO < +12V -7V < VO < +12V 2.0 0.8 +10 +250 +250 2.5 20 20 45 45 10 30 52 60 40 60 75 75 70 120 120 120 120 Mbps ns ns ns ns ns ns ns ns RE = VCC, DE = VCC Figures 2 and 8 Figures 2 and 8 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 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 +0.2 20 0.4 +1 15 1.0 -0.8 60 Volts mV Volts Volts A k mA mA mA -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 10/16/02 SP3493/3494 +3.3V Low Power Slew-Rate Limited RS-485/RS-422 Transceivers (c) Copyright 2002 Sipex Corporation 3 SPECIFICATIONS (continued) TAMB = TMIN to TMAX and VCC = +3.3V 5% unless otherwise noted. PARAMETERS SP3494 RECEIVER AC Characteristics Maximum Data Rate Receiver Input to Output, tPLH Receiver Input to Output, tPHL 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 MIN. TYP. MAX. UNITS CONDITIONS 2.5 40 40 70 70 10 35 35 35 35 100 100 Mbps ns ns ns RE = 0V, DE = 0V Figures 6 and 11 Figures 6 and 11 tRSKEW = tRPHL - tRPLH , Figures 6 and 11 60 60 60 60 ns ns ns ns Figures 7 and 12; S1 closed, S2 open Figures 7 and 12; S2 closed, S1 open Figures 7 and 12; S1 closed, S2 open Figures 7 and 12; S2 closed, S1 open RE = 3.3V, DE = 0V 50 75 65 65 50 50 200 150 150 200 200 ns ns ns ns ns Figures 4 and 10 Figures 5 and 10 Figures 7 and 12; S2 closed, S1 open Figures 7 and 12; S1 closed, S2 open SP3494 POWER REQUIREMENTS Supply Current No Load Shutdown Mode 1000 800 2000 1500 10 A A A RE, DI = 0V or VCC; DE = VCC RE = 0V, DI = 0V or VCC; DE = 0V DE = 0V, RE=VCC 10/16/02 SP3493/3494 +3.3V Low Power Slew-Rate Limited RS-485/RS-422 Transceivers (c) Copyright 2002 Sipex Corporation 4 PIN FUNCTION - SP3493 Vcc 1 R2 8A 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. R 7B 6Z D3 GND 4 D 5Y SP3493 Pinout PIN FUNCTION - SP3494 Pin 1 - RO - Receiver Output. RO 1 R 8 VCC Pin 2 - RE - Receiver Output Enable Active LOW. Pin 3 - DE - Driver Output Enable Active HIGH. RE 2 7 B Pin 4 - DI - Driver Input. Pin 5 - GND - Ground Connection. Pin 6 - A - Driver Output/Receiver Input Non-inverting. Pin 7 - B - Driver Output/Receiver Input Inverting. Pin 8 - Vcc - Positive Supply +3.00V < VCC < +3.60V DE 3 6 A D DI 4 5 GND SP3494 Pinout 10/16/02 SP3493/3494 +3.3V Low Power Slew-Rate Limited RS-485/RS-422 Transceivers (c) Copyright 2002 Sipex Corporation 5 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. 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 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. Drivers 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 54 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. 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. Receivers The receivers have differential inputs with an input sensitivity as low +200mV. Input impedance of the receivers is typically 15k (12k 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 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. 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, 1A maximum. 10/16/02 SP3493/3494 +3.3V Low Power Slew-Rate Limited RS-485/RS-422 Transceivers (c) Copyright 2002 Sipex Corporation 6 VDM R S1 RL = 27 D VCC VOD R GENERATOR (NOTE 1) 50 D OUT CL = 15pF (NOTE 2) VOC VCC VOM = VOH + VOL 2 1.5V Figure 1. Driver DC Test Load Circuit Figure 2. Driver Propagation Delay Test Circuit S1 D OUT CL = 50pF (NOTE 2) GENERATOR (NOTE 1) 50 RL = 110 CL D GENERATOR (NOTE 1) 50 VCC RL = 60 OUT CL = 15pF (NOTE 2) VOM = VOH + VOL 2 1.5V Figure 3. Driver Differential Output Delay and Transition Time Circuit VCC RL = 110 S1 0V OR 3V D CL = 50pF (NOTE 2) GENERATOR (NOTE 1) 50 OUT Figure 4. Driver Enable and Disable Timing Circuit, output HiGH VID GENERATOR (NOTE 1) R OUT CL = 15pF (NOTE 2) 50 1.5V 0V VOM = VCC 2 Figure 5. Driver Enable and Disable Timing Circuit, Output LOW Figure 6. Receiver Propagation Delay Test Circuit 1.5V -1.5V S3 1k VID R S1 VCC S2 CL = 15pF (NOTE 2) GENERATOR (NOTE 1) 50 Figure 7. Receiver Enable and Disable Timing Circuit INPUTS RE X X X DE 1 1 0 DI 1 0 X LINE CONDITION No Fault No Fault X OUTPUTS B 0 1 Z A 1 0 Z INPUTS RE DE 0 0 0 0 0 0 1 0 A-B +0.2V -0.2V Inputs Open X OUTPUTS R 1 0 1 Z Table 1. Transmit Function Truth Table 10/16/02 Table 2. Receive Function Truth Table (c) Copyright 2002 Sipex Corporation SP3493/3494 +3.3V Low Power Slew-Rate Limited RS-485/RS-422 Transceivers 7 3V INPUT 0V VOH Y OUTPUT VOL tPHL VOH Z OUTPUT VOL tTD tTD 1.5V tPLH VOM 1.5V tPHL VOM IN 1.5V 1.5V 3V 0V tDO1 tDO2 2.0V 90% 50% 10% -2.0V tPLH VOM VOM OUT 50% 10% 90% VOM = VOH + VOL 1.5V 2 Figure 8. Driver Propagation Delay Waveforms Figure 9. Driver Differential Output Delay and Transition Time Waveforms 3V DE 0V VOH OUTPUT HIGH 0V VCC OUTPUT LOW VOL VOM = VOH + VOL 1.5V 2 tPZL VOM tPLZ 0.25V tPZH VOM tPHZ 0.25V 1.5V 1.5V 3V INPUT 0V tRPLH VCC OUTPUT 0V VOM = VCC 2 VOM VOM tRPHL 1.5V 1.5V Figure 10. Driver Enable and Disable Timing Waveforms Figure 11. Receiver Propagation Delay Waveforms S1 is open S2 is closed S3 = 1.5V 3V RE 0V tPRHZ VOH OUTPUT 0V 10% 1.5V tPRZH tPRSH OUTPUT VOL 3V S1 is closed S2 is open S3 = -1.5V 1.5V 1.5V RE 0V 1.5V tPRLZ VCC 1.5V tPRZL tPRSL 1.5V 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=50. 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 (c) Copyright 2002 Sipex Corporation 8 PACKAGE: PLASTIC DUAL-IN-LINE (NARROW) E1 E D1 = 0.005" min. (0.127 min.) D A1 = 0.015" min. (0.381min.) A = 0.210" max. (5.334 max). A2 C O eA = 0.300 BSC (7.620 BSC) L e = 0.100 BSC (2.540 BSC) B1 B ALTERNATE END PINS (BOTH ENDS) DIMENSIONS (Inches) Minimum/Maximum (mm) A2 B B1 C D E E1 L O 8-PIN 0.115/0.195 (2.921/4.953) 0.014/0.022 (0.356/0.559) 0.045/0.070 (1.143/1.778) 0.008/0.014 (0.203/0.356) 0.355/0.400 (9.017/10.160) 0.300/0.325 (7.620/8.255) 0.240/0.280 (6.096/7.112) 0.115/0.150 (2.921/3.810) 0/ 15 (0/15) 10/16/02 SP3493/3494 +3.3V Low Power Slew-Rate Limited RS-485/RS-422 Transceivers (c) Copyright 2002 Sipex Corporation 9 PACKAGE: PLASTIC SMALL OUTLINE (SOIC) (NARROW) E H h x 45 D A O e B A1 L DIMENSIONS (Inches) Minimum/Maximum (mm) A A1 B D E e H h L O 8-PIN 0.053/0.069 (1.346/1.748) 0.004/0.010 (0.102/0.249 0.014/0.019 (0.35/0.49) 0.189/0.197 (4.80/5.00) 0.150/0.157 (3.802/3.988) 0.050 BSC (1.270 BSC) 0.228/0.244 (5.801/6.198) 0.010/0.020 (0.254/0.498) 0.016/0.050 (0.406/1.270) 0/8 (0/8) 10/16/02 SP3493/3494 +3.3V Low Power Slew-Rate Limited RS-485/RS-422 Transceivers (c) Copyright 2002 Sipex Corporation 10 ORDERING INFORMATION 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: 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. 10/16/02 SP3493/3494 +3.3V Low Power Slew-Rate Limited RS-485/RS-422 Transceivers (c) Copyright 2002 Sipex Corporation 11 SP3494CN SP3494CP SP3494EN SP3494EP 0C to +70C 0C to +70C -40C to +85C -40C to +85C 8-pin Narrow SOIC 8-pin Plastic DIP 8-pin Narrow SOIC 8-pin Plastic DIP Model SP3493CN SP3493CP SP3493EN SP3493EP Temperature Range 0C to +70C 0C to +70C .-40C to +85C -40C to +85C Package 8-pin Narrow SOIC 8-pin Plastic DIP 8-pin Narrow SOIC 8-pin Plastic DIP |
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