SP491

® SP490/SP491 Full Duplex RS-485 Transceivers +5V Only Low Power BiCMOS Driver/Receiver Enable (SP491) RS-485 and RS-422 Drivers/Receivers Pin Compatible with LTC490 and SN75179 (SP490) ■ Pin Compatible with LTC491 and SN75180 (SP491) ■ ■ ■ ■ ■ DESCRIPTION The SP490 is a low power differential line driver/receiver meeting RS-485 and RS-422 standards up to 5Mbps. The SP491 is identical to the SP490 with the addition of driver and receiver tri-state enable lines. Both products feature ±200mV receiver input sensitivity, over wide common mode range. The SP490 is available in 8-pin plastic DIP and 8-pin NSOIC packages for operation over the commercial and industrial temperature ranges. The SP491 is available in 14-pin DIP and 14-pin NSOIC packages for operation over the commercial and industrial temperature ranges. BLOCK DIAGRAMS NC 1 14 Vcc 13 NC 12 A Vcc 1 R2 R2 8A R 11 B R REB 3 7B DE 4 6Z D3 GND 4 10 Z D5 D 5Y D GND 6 GND 7 9Y 8 NC SP490 SP491 Date: 05/10/04 SP490/491 Full Duplex RS-485 Transceivers © Copyright 2004 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....................................................................................................+7V Input Voltages Drivers................................................-0.5V to (VCC+0.5V) Receivers..................................................................±14V Output Voltages Drivers......................................................................±14V Receivers...........................................-0.5V to (VCC+0.5V) Storage Temperature....................................................-65˚C to +150˚ Power Dissipation.....................................................................1000mW ELECTRICAL CHARACTERISTICS TMIN to TMAX and VCC = 5V ± 5% unless otherwise noted. PARAMETERS SP490 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 SP490 DRIVER AC Characteristics Maximum Data Rate Driver Input to Output Driver Input to Output 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 µA mA mA Unloaded; R = ∞ ; see figure 1 With Load; R = 50Ω; (RS422); see figure 1 With Load; R = 27Ω; (RS485); see figure 1 R = 27Ω or R = 50Ω; see figure 1 R = 27Ω or R = 50Ω; see figure 1 Applies to D Applies to D Applies to D -7V ≤ VO ≤ +12V -7V ≤ VO ≤ +12V 2.0 0.8 ±10 35 35 250 250 5 30 30 5 15 40 60 60 Mbps ns ns ns ns tPLH; RDIFF = 54Ω, CL1 = CL2 = 100pF; see figures 3 and 6 tPHL; RDIFF = 54Ω, CL1 = CL2 = 100pF; see figures 3 and 6 see figures 3 and 6, tSKEW = | tDPLH - tDPHL | From 10% to 90%; RDIFF = 54Ω, CL1 = CL2 = 100pF; see figures 3 and 6 SP490 RECEIVER DC Characteristics Differential Input Threshold Input Hysteresis Output Voltage High Output Voltage Low Input Resistance Input Current (A, B); VIN = 12V Input Current (A, B); VIN = -7V Short-Circuit Current 0.2 70 3.5 +0.2 0.4 12 15 ±1.0 -0.8 85 Volts mV Volts Volts kΩ mA mA mA -7V ≤ VCM ≤ 12V VCM = 0V IO = -4mA, VID = +200mV IO = +4mA, VID = -200mV -7V ≤ VCM ≤ 12V VIN = 12V VIN = -7V 0V ≤ VO ≤ VCC Date: 05/10/04 SP490/491 Full Duplex RS-485 Transceivers © Copyright 2004 Sipex Corporation 2 ELECTRICAL CHARACTERISTICS TMIN to TMAX and VCC = 5V ± 5% unless otherwise noted. PARAMETERS SP490 RECEIVER AC Characteristics Maximum Data Rate Receiver Input to Output Receiver Input to Output Diff. Receiver Skew ItPLH-tPHLI POWER REQUIREMENTS Supply Voltage Supply Current ENVIRONMENTAL AND MECHANICAL Operating Temperature Commercial (_C_) Industrial (_E_) Storage Temperature Package Plastic DIP (_S_) NSOIC (_N) MIN. TYP. MAX. UNITS CONDITIONS 5 90 90 13 150 150 Mbps ns ns ns tPLH; RDIFF = 54Ω, CL1 = CL2 = 100pF; Figures 3 & 8 tPHL; RDIFF = 54Ω, CL1 = CL2 = 100pF; Figures 3 & 8 RDIFF = 54Ω; CL1 = CL2 = 100pF; Figures 3 & 8 +4.75 900 +5.25 Volts µA 0 -40 -65 +70 +85 +150 °C °C °C A R VOD R B VOC Receiver Output CRL Test Point S1 1K S2 1K VCC Figure 1. Driver DC Test Load Circuit Figure 2. Receiver Timing Test Load Circuit 3V DE DI A B CL2 RDIFF CL1 A RO B 15pF Output Under Test 500 CL S1 VCC S2 Figure 3. Driver/Receiver Timing Test Circuit Figure 4. Driver Timing Test Load #2 Circuit Date: 05/10/04 SP490/491 Full Duplex RS-485 Transceivers © Copyright 2004 Sipex Corporation 3 +3V DI 0V DRIVER OUTPUT B A f = 1MHz; tR < 10ns; tF < 10ns 10ns 1.5V tPLH VO 1/2VO tDPLH tDPHL tPHL 1/2VO 1.5V DIFFERENTIAL VO+ OUTPUT 0V V A – V B V O– tSKEW = | tDPLH - tDPHL | SKEW DPLH DPHL Figure 6. Driver Propagation Delays tR tF +3V DE 0V 5V A, B VOL VOH A, B 0V f = 1MHz; tR < 10ns; tF < 10ns 1.5V tZL 2.3V Output normally LOW 1.5V tLZ 0.5V 0.5V tHZ 2.3V tZH Output normally HIGH Figure 7. Driver Enable and Disable Times V0D2+ A–B V0D2– VOH R VOL tPHL 0V INPUT 0V 1.5V OUTPUT 1.5V tPLH f = 1MHz; tR < 10ns; tF < 10ns tSKEW = | tPHL - tPLH | Figure 8. Receiver Propagation Delays Date: 05/10/04 SP490/491 Full Duplex RS-485 Transceivers © Copyright 2004 Sipex Corporation 4 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............................................................................................................................+7V Input Voltages Logic...................................................-0.5V to (VCC+0.5V) Drivers................................................-0.5V to (VCC+0.5V) Receivers..................................................................±14V Output Voltages Logic...................................................-0.5V to (VCC+0.5V) Drivers......................................................................±14V Receivers...........................................-0.5V to (VCC+0.5V) Storage Temperature......................................................-65˚C to +150 Power Dissipation.....................................................................1000mW ELECTRICAL CHARACTERISTICS TMIN to TMAX and VCC = 5V ± 5% unless otherwise noted. PARAMETERS SP491 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 SP491 DRIVER AC Characteristics Maximum Data Rate Driver Input to Output Driver Input to Output 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 MIN. TYP. MAX. UNITS CONDITIONS GND 2 1.5 VCC VCC VCC 0.2 3 Volts Volts Volts Volts Volts Volts Volts µA mA mA Unloaded; R = ∞ ; see figure 1 With Load; R = 50Ω; (RS422); see figure 1 With Load; R = 27Ω; (RS485); see figure 1 R = 27Ω or R = 50Ω; see figure 1 R = 27Ω or R = 50Ω; see figure 1 Applies to D, REB, DE Applies to D, REB, DE Applies to D, REB, DE -7V ≤ VO ≤ 12V -7V ≤ VO ≤ 12V 2.0 0.8 ±10 35 35 250 250 5 20 20 30 30 5 60 60 10 40 70 70 70 70 Mbps ns ns ns ns ns ns ns ns 3 15 40 40 40 40 REB = 5V, DE = 5V tPLH; RDIFF = 54Ω, CL1 = CL2 = 100pF; see figures 3 and 6 tPHL; RDIFF = 54Ω, CL1 = CL2 = 100pF; see figures 3 and 6 see figures 3 and 6, tSKEW = | tDPLH - tDPHL | From 10% to 90%; RDIFF = 54Ω, CL1 = CL2 = 100pF; see figures 3 and 6 CL1 = CL2 = 100pF; see figures 4 and 7; S2 closed CL1 = CL2 = 100pF; see figures 4 and 7; S1 closed CL1 = CL2 = 100pF; see figures 4 and 7; S1 closed CL1 = CL2 = 100pF; see figures 4 and 7; S2 closed Date: 05/10/04 SP490/491 Full Duplex RS-485 Transceivers © Copyright 2004 Sipex Corporation 5 ELECTRICAL CHARACTERISTICS TMIN to TMAX and VCC = 5V ± 5% unless otherwise noted. PARAMETERS MIN. SP491 RECEIVER DC Characteristics Differential Input Threshold -0.2 Input Hysteresis Output Voltage High 3.5 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 SP491 RECEIVER DC Characteristics Maximum Data Rate 5 Receiver Input to Output 60 Receiver Input to Output Diff. Receiver Skew ItPLH-tPHLI Receiver Enable to Output Low Receiver Enable to Output High Receiver Disable from Low Receiver Disable from High POWER REQUIREMENTS Supply Voltage +4.75 Supply Current SP491 ENVIRONMENTAL AND MECHANICAL Operating Temperature Commercial (_C_) Industrial (_E_) Storage Temperature Package Plastic DIP (_S_) NSOIC (_N) 60 TYP. MAX. UNITS CONDITIONS +0.2 70 0.4 ±1 15 ±1.0 -0.8 85 Volts mV Volts Volts µA kΩ mA mA mA -7V ≤ VCM ≤ 12V VCM = 0V IO = -4mA, VID = +200mV IO = +4mA, VID = -200mV 0.4V ≤ VO ≤ 2.4V; REB = 5V -7V ≤ VCM ≤ 12V DE = 0V, VCC = 0V or 5.25V, VIN = 12V DE = 0V, VCC = 0V or 5.25V, VIN = -7V 0V ≤ VO ≤ VCC 90 90 13 20 20 20 20 150 150 Mbps ns ns ns REB = 0V tPLH; RDIFF = 54Ω, CL1 = CL2 = 100pF; Figures 3 & 8 tPHL; RDIFF = 54Ω, CL1 = CL2 = 100pF; Figures 3 & 8 RDIFF = 54Ω; CL1 = CL2 = 100pF; Figures 3 & 8 50 50 50 50 +5.25 ns ns ns ns Volts µA CRL = 15pF; Figures 2 and 9; S1 closed CRL = 15pF; Figures 2 and 9; S2 closed CRL = 15pF; Figures 2 and 9; S1 closed CRL = 15pF; Figures 2 and 9; S2 closed 600 REB, D = 0V or VCC; DE = VCC 0 -40 -65 +70 +85 +150 °C °C °C +3V RE 0V 5V R VIL VIH R 0V 1.5V tZH Output normally HIGH 1.5V Output normally LOW 0.5V 0.5V tHZ 1.5V f = 1MHz; t < 10ns; t < 10ns R F tZL 1.5V tLZ Figure 9. Receiver Enable and Disable Times Date: 05/10/04 SP490/491 Full Duplex RS-485 Transceivers © Copyright 2004 Sipex Corporation 6 DESCRIPTION The SP490 and SP491 are full-duplex differential transceivers that meet the requirements of RS-485 and RS-422. Fabricated with a Sipex proprietary BiCMOS process, both products require a fraction of the power of older bipolar designs. The RS-485 standard is ideal for multi-drop applications or for long-distance interfaces. RS-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, RS-485 transceivers are equipped with a wide (-7V to +12V) common mode range to accommodate ground potential differences. Because RS-485 is a differential interface, data is virtually immune to noise in the transmission line. Driver... The drivers for both the SP490 and SP491 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 SP491 has a driver enable control line which is active high. A logic high on DE (pin 4) of the S P491 w ill enable the differential driver outputs. A logic low on DE (pin 4) of the SP491 will tri-state the driver outputs. The SP490 does not have a driver enable. Receiver... The receivers for both the SP490 and SP491 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 SP490 a nd S P491 a re 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 SP491 has a receiver enable control line which is active low. A logic low on REB (pin 3) of the SP491 will enable the differential receiver. A logic high on REB (pin 3) of the SP491 will tri-state the receiver. Date: 05/10/04 SP490/491 Full Duplex RS-485 Transceivers © Copyright 2004 Sipex Corporation 7 PACKAGE: 8 PIN NSOIC D e E/2 E1 E E1/2 SEE VIEW C 1 INDEX AREA (D/2 X E1/2) b Ø1 TOP VIEW L2 Seating Plane Ø1 Gauge Plane Ø L L1 A A2 SEATING PLANE A1 VIEW C SIDE VIEW 8 Pin NSOIC (JEDEC MS-012, AA - VARIATION) DIMENSIONS Minimum/Maximum (mm) WITH PLATING b COMMON HEIGHT DIMENSION SYMBOL A A1 A2 b c D E E1 e L L1 L2 Ø Ø1 MIN NOM MAX 1.75 1.35 0.25 0.10 1.25 1.65 0.31 0.51 0.17 0.25 4.90 BSC 6.00 BSC 3.90 BSC 1.27 BSC 0.40 1.27 1.04 REF 0.25 BSC 0º 8º 5º 15º c BASE METAL CONTACT AREA 8 PIN NSOIC Date: 05/10/04 SP490/491 Full Duplex RS-485 Transceivers © Copyright 2004 Sipex Corporation 8 PACKAGE: 8 PIN NSOIC D e E/2 E1 E E1/2 SEE VIEW C 1 INDEX AREA (D/2 X E1/2) B b Ø1 TOP VIEW Gauge Plane L2 Seating Plane Ø1 L L1 Ø VIEW C A A2 A1 SIDE VIEW b 14 Pin NSOIC (JEDEC MS-012, AB - VARIATION) DIMENSIONS Minimum/Maximum (mm) WITH PLATING COMMON HEIGHT DIMENSION SYMBOL A A1 A2 b c D E E1 e L L1 L2 Ø Ø1 MIN NOM MAX - 1.75 1.35 0.25 0.10 1.25 1.65 0.31 0.51 - 0.25 0.17 8.65 BSC 6.00 BSC 3.90 BSC 1.27 BSC 0.40 1.27 1.04 REF 0.25 BSC 0º 8º 5º - 15º c BASE METAL CONTACT AREA 14 PIN NSOIC Date: 05/10/04 SP490/491 Full Duplex RS-485 Transceivers © Copyright 2004 Sipex Corporation 9 PACKAGE: 8 PIN NSOIC A1 D A N D1 b3 e b2 b L A2 INDEX AREA E1 E 123 N/2 8 PIN PDIP JEDEC MS-001 (BA) Variation A A1 A2 b b2 b3 c D D1 E E1 e eA eB L Dimensions in inches MIN .015 .115 .014 .045 .030 .008 .355 .005 .300 .240 NOM MAX .130 .018 .060 .039 .010 .365 .310 .250 .100 BSC .300 BSC .115 .130 .430 .150 .210 .195 .022 .070 .045 .014 .400 .325 .280 E c eA eB b C 8 pin PDIP Date: 05/10/04 SP490/491 Full Duplex RS-485 Transceivers © Copyright 2004 Sipex Corporation 10 PACKAGE: 8 PIN NSOIC A1 D A N D1 b3 e b2 b L A2 INDEX AREA E1 E 123 N/2 14 PIN PDIP JEDEC MS-001 (AA) Variation A A1 A2 b b2 b3 c D D1 E E1 e eA eB L Dimensions in inches MIN .015 .115 .014 .045 .030 .008 .735 .005 .300 .240 NOM MAX .130 .018 .060 .039 .010 .750 .310 .250 .100 BSC .300 BSC .115 .130 .430 .150 .210 .195 .022 .070 .045 .014 .775 .325 .280 E c eA eB b C 14 pin PDIP Date: 05/10/04 SP490/491 Full Duplex RS-485 Transceivers © Copyright 2004 Sipex Corporation 11 ORDERING INFORMATION Model Temperature Range Package SP490CN. ..................................................................................... 0˚C to +70˚C ............................................................................... 8-Pin NSOIC SP490CN/TR ................................................................................ 0˚C to +70˚C ............................................................................... 8-Pin NSOIC SP490CS ...................................................................................... 0˚C to +70˚C ................................................................................ 8-Pin PDIP SP490EN ..................................................................................... -40˚C to +85˚C ............................................................................. 8-Pin NSOIC SP490EN/TR ............................................................................... -40˚C to +85˚C ............................................................................. 8-Pin NSOIC SP490ES ..................................................................................... -40˚C to +85˚C .............................................................................. 8-Pin PDIP SP491CN ...................................................................................... 0˚C to +70˚C .............................................................................. 14-Pin NSOIC SP491CN/TR ................................................................................ 0˚C to +70˚C .............................................................................. 14-Pin NSOIC SP491CS ...................................................................................... 0˚C to +70˚C ............................................................................... 14-Pin PDIP SP491EN ..................................................................................... -40˚C to +85˚C ............................................................................ 14-Pin NSOIC SP491EN/TR ............................................................................... -40˚C to +85˚C ............................................................................ 14-Pin NSOIC SP491ES ..................................................................................... -40˚C to +85˚C ............................................................................. 14-Pin PDIP /TR = Tape and Reel Pack quantity is 2500 for NSOIC. Please consult factory for pricing and availability of various package and temperature options or price and availability of tapeon-reel. Corporation ANALOG EXCELLENCE Sipex Corporation Headquarters and Sales Office 233 South Hillview Drive Milpitas, CA 95035 TEL: (408) 934-7500 FAX: (408) 935-7600 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. Date: 05/10/04 SP490/491 Full Duplex RS-485 Transceivers © Copyright 2004 Sipex Corporation 12