SP490 SIPEX | Alldatasheet
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Date: 05/10/04 SP490/491 Full Duplex RS-485 Transceivers © Copyright 2004 Sipex Corporation 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) 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. 7 8 Vcc GND R D A B Z Y R D 14NC REB DE GND NC NC 4 5 R D Vcc GND R D A B Z Y SP490 SP491
DESCRIPTION
Date: 05/10/04 SP490/491 Full Duplex RS-485 Transceivers © Copyright 2004 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. V Input Voltages Output Voltages TMIN to TMAX and VCC = 5V ± 5% unless otherwise noted. PARAMETERS MIN. TYP. MAX. UNITS CONDITIONS SP490 DRIVER DC Characteristics Differential Output Voltage GND V CC Volts Unloaded; R = ∞ ; see figure 1 Differential Output Voltage 2 V CC Volts With Load; R = 50 Ω; (RS422); see figure 1 Differential Output Voltage 1.5 V CC Volts With Load; R = 27Ω; (RS485); see figure 1 Change in Magnitude of Driver Differential Output Voltage for Complimentary States 0.2 Volts R = 27 Ω or R = 50Ω; see figure 1 Driver Common-Mode Output Voltage 3 Volts R = 27 Ω or R = 50Ω; see figure 1 Input High Voltage 2.0 Volts Applies to D Input Low Voltage 0.8 Volts Applies to D Input Current ±10 µA Applies to D Driver Short-Circuit Current V OUT = HIGH 35 250 mA -7V ≤ VO ≤ +12V VOUT = LOW 35 250 mA -7V ≤ VO ≤ +12V SP490 DRIVER AC Characteristics Maximum Data Rate 5 Mbps Driver Input to Output 30 60 ns t PLH; RDIFF = 54Ω, CL1 = CL2 = 100pF; see figures 3 and 6 Driver Input to Output 30 60 ns t PHL; RDIFF = 54Ω, CL1 = CL2 = 100pF; see figures 3 and 6 Driver Skew 5 ns see figures 3 and 6, tSKEW = | tDPLH - tDPHL | Driver Rise or Fall Time 15 40 ns From 10% to 90%; R DIFF = 54Ω, CL1 = CL2 = 100pF; see figures 3 and 6 SP490 RECEIVER DC Characteristics Differential Input Threshold 0.2 +0.2 Volts -7V ≤ VCM ≤ 12V Input Hysteresis 70 mV V CM = 0V Output Voltage High 3.5 Volts I O = -4mA, VID = +200mV Output Voltage Low 0.4 Volts I O = +4mA, VID = -200mV Input Resistance 12 15 k Ω -7V ≤ VCM ≤ 12V Input Current (A, B); VIN = 12V ±1.0 mA V IN = 12V Input Current (A, B); VIN = -7V -0.8 mA V IN = -7V Short-Circuit Current 85 mA 0V ≤ VO ≤ VCC
ELECTRICAL CHARACTERISTICS
Date: 05/10/04 SP490/491 Full Duplex RS-485 Transceivers © Copyright 2004 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. V Input Voltages Output Voltages TMIN to TMAX and VCC = 5V ± 5% unless otherwise noted. PARAMETERS MIN. TYP. MAX. UNITS CONDITIONS SP491 DRIVER DC Characteristics Differential Output Voltage GND V CC Volts Unloaded; R = ∞ ; see figure 1 Differential Output Voltage 2 V CC Volts With Load; R = 50 Ω; (RS422); see figure 1 Differential Output Voltage 1.5 V CC Volts With Load; R = 27Ω; (RS485); see figure 1 Change in Magnitude of Driver Differential Output Voltage for Complimentary States 0.2 Volts R = 27 Ω or R = 50Ω; see figure 1 Driver Common-Mode Output Voltage 3 Volts R = 27 Ω or R = 50Ω; see figure 1 Input High Voltage 2.0 Volts Applies to D, REB, DE Input Low Voltage 0.8 Volts Applies to D, REB, DE Input Current ±10 µA Applies to D, REB, DE Driver Short-Circuit Current V OUT = HIGH 35 250 mA -7V ≤ VO ≤ 12V VOUT = LOW 35 250 mA -7V ≤ VO ≤ 12V SP491 DRIVER AC Characteristics Maximum Data Rate 5 Mbps REB = 5V, DE = 5V Driver Input to Output 20 30 60 ns t PLH; RDIFF = 54Ω, CL1 = CL2 = 100pF; see figures 3 and 6 Driver Input to Output 20 30 60 ns t PHL; RDIFF = 54Ω, CL1 = CL2 = 100pF; see figures 3 and 6 Driver Skew 5 10 ns see figures 3 and 6, tSKEW = | tDPLH - tDPHL | Driver Rise or Fall Time 3 15 40 ns From 10% to 90%; R DIFF = 54Ω, CL1 = CL2 = 100pF; see figures 3 and 6 Driver Enable to Output High 40 70 ns C L1 = CL2 = 100pF; see figures 4 and 7; S2 closed Driver Enable to Output Low 40 70 ns C L1 = CL2 = 100pF; see figures 4 and 7; S1 closed Driver Disable Time from Low 40 70 ns C L1 = CL2 = 100pF; see figures 4 and 7; S1 closed Driver Disable Time from High 40 70 ns C L1 = CL2 = 100pF; see figures 4 and 7; S2 closed
Date: 05/10/04 SP490/491 Full Duplex RS-485 Transceivers © Copyright 2004 Sipex Corporation TMIN to TMAX and VCC = 5V ± 5% unless otherwise noted. PARAMETERS MIN. TYP. MAX. UNITS CONDITIONS SP491 RECEIVER DC Characteristics Differential Input Threshold -0.2 +0.2 Volts -7V ≤ VCM ≤ 12V Input Hysteresis 70 mV V CM = 0V Output Voltage High 3.5 Volts I O = -4mA, VID = +200mV Output Voltage Low 0.4 Volts I O = +4mA, VID = -200mV Three State (high impedance) Output Current ±1 µA 0.4V ≤ V O ≤ 2.4V; REB = 5V Input Resistance 12 15 k Ω -7V ≤ VCM ≤ 12V Input Current (A, B); VIN = 12V ±1.0 mA DE = 0V, V CC = 0V or 5.25V, VIN = 12V Input Current (A, B); VIN = -7V -0.8 mA DE = 0V, V CC = 0V or 5.25V, VIN = -7V Short-Circuit Current 7 85 mA 0V ≤ VO ≤ VCC SP491 RECEIVER DC Characteristics Maximum Data Rate 5 Mbps REB = 0V Receiver Input to Output 60 90 150 ns t PLH; RDIFF = 54Ω, CL1 = CL2 = 100pF; Figures 3 & 8 Receiver Input to Output 60 90 150 ns t PHL; RDIFF = 54Ω, CL1 = CL2 = 100pF; Figures 3 & 8 Diff. Receiver Skew ItPLH-tPHLI1 3 n s R DIFF = 54Ω; CL1 = CL2 = 100pF; Figures 3 & 8 Receiver Enable to Output Low 20 50 ns C RL = 15pF; Figures 2 and 9; S1 closed Receiver Enable to Output High 20 50 ns C RL = 15pF; Figures 2 and 9; S2 closed Receiver Disable from Low 20 50 ns C RL = 15pF; Figures 2 and 9; S1 closed Receiver Disable from High 20 50 ns C RL = 15pF; Figures 2 and 9; S2 closed POWER REQUIREMENTS Supply Voltage +4.75 +5.25 Volts Supply Current 600 µA REB, D = 0V or VCC; DE = VCC SP491 ENVIRONMENTAL +3V RE R 1.5V 1.5V tZL tZH f = 1MHz; tR < 10ns; tF < 10ns R 1.5V 1.5V tLZ tHZ 0.5V 0.5V Output normally LOW Output normally HIGH VIL VIH Figure 9. Receiver Enable and Disable Times
Date: 05/10/04 SP490/491 Full Duplex RS-485 Transceivers © Copyright 2004 Sipex Corporation 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 SP491 will 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 and SP491 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. 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 SEE VIEW C TOP VIEW
8 PIN NSOIC
Ø 1.65 DIMENSIONS Minimum/Maximum (mm) (JEDEC MS-012, AA - VARIATION) COMMON HEIGHT DIMENSION A b c L e E 1.35
4.90 BSC
0.40 0.31 0.51 SYMBOL MIN NOM MAX 0.10 - 0.25 D 1.75 1.25 0.17 0.25
6.00 BSC
3.90 BSC
1.27 BSC
1.27
1.04 REF
0.25 BSC
15º e E E/2 INDEX AREA (D/2 X E1/2) E1/2 D b L ØØ1 Seating Plane Gauge Plane VIEW C A A2 SEATING PLANE SIDE VIEW c WITH PLATING BASE METAL b CONTACT AREA PACKAGE: 8 PIN NSOIC
Date: 05/10/04 SP490/491 Full Duplex RS-485 Transceivers © Copyright 2004 Sipex Corporation
14 PIN NSOIC
Ø 1.65 DIMENSIONS Minimum/Maximum (mm) (JEDEC MS-012, AB - VARIATION) COMMON HEIGHT DIMENSION A b c L e E 1.35
8.65 BSC
0.40 0.31 0.51 SYMBOL MIN NOM MAX 0.10 - 0.25 D 1.75 1.25 0.17 0.25 1.27 15º CONTACT AREA SEE VIEW C TOP VIEW c WITH PLATING BASE METAL b A A2 A1 SIDE VIEW e E E/2 bBINDEX AREA (D/2 X E1/2) E1/2 D L ØØ1 Seating Plane Gauge Plane VIEW C PACKAGE: 8 PIN NSOIC
Date: 05/10/04 SP490/491 Full Duplex RS-485 Transceivers © Copyright 2004 Sipex Corporation N 1 23 INDEX AREA eA eB E - - .210 .015 - Dimensions in inches8 PIN PDIP JEDEC MS-001 (BA) Variation .115 .130 .195 .014 .018 .022 .045 .060 .070 .240 .250 .280 A b c E e eA eB .115 .130 .150L MIN NOM MAX b3 .030 .039 .045 D .008 .010 .014 .355 .365 .400 .005 .300 .310 .325 .100 BSC .300 BSC .430 - - C b N/2 8 pin PDIP EE1 D A L b b2eb3 c PACKAGE: 8 PIN NSOIC
Date: 05/10/04 SP490/491 Full Duplex RS-485 Transceivers © Copyright 2004 Sipex Corporation N 1 23 INDEX AREA eA eB E C b - - .210 .015 - Dimensions in inches14 PIN PDIP JEDEC MS-001 (AA) Variation .115 .130 .195 .014 .018 .022 .045 .060 .070 .240 .250 .280 A b c E e eA eB .115 .130 .150L MIN NOM MAX b3 .030 .039 .045 D .008 .010 .014 .735 .750 .775 .005 .300 .310 .325 .100 BSC .300 BSC .430 - - N/2 14 pin PDIP EE1 D A L b b2eb3 c PACKAGE: 8 PIN NSOIC
Date: 05/10/04 SP490/491 Full Duplex RS-485 Transceivers © Copyright 2004 Sipex Corporation Model Temperature Range Package Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability aris ing 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. Corporation ANALOG EXCELLENCE Sipex Corporation Headquarters and Sales Office
233 South Hillview Drive
Milpitas, CA 95035 TEL: (408) 934-7500 FAX: (408) 935-7600 /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 tap e- on-reel.