SP491EN/TR

SP490 EXAR | Alldatasheet

Document overview

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Technical content

Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (50)668-707 • www.exar.com SP490,49_00_07408

FEATURES

• +5V Only
• Low Power BiCMOS
• Driver/Receiver Enable (SP49)
• RS-485 and RS-422 Drivers/Receivers
• Pin Compatible with LTC490 and SN7579 (SP490)
• Pin Compatible with LTC49 and SN7580 (SP49) 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 4-pin DIP and 4-pin NSOIC packages for operation over the commercial and industrial temperature ranges. SP490 SP491

DESCRIPTION

Now Available in Lead Free Packaging Full Duplex RS-485 Transceivers SP490 and SP491

Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (50)668-707 • www.exar.com SP490,49_00_07408 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. Input Voltages Output Voltages PARAMETERS MIN. TYP . MAX. UNITS CONDITIONS SP490 DRIVER DC Characteristics Differential Output Voltage GND VCC Volts Unloaded; R = ∞ ; see figure 1 Differential Output Voltage 2 VCC Volts With Load; R = 50Ω; (RS422); see figure 1 Differential Output Voltage .5 VCC Volts With Load; R = 27Ω; (RS485); see figure 1 Change in Magnitude of Driver Differential Output Voltage for Complimentary States 0.2 Volts R = 27Ω or R = 50Ω; see figure 1 Driver Common-Mode Output Voltage 3 Volts R = 27Ω 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 ±0 µA Applies to D Driver Short-Circuit Current VOUT = HIGH 35 250 mA -7V ≤ V O ≤ +12V VOUT = LOW 35 250 mA -7V ≤ V O ≤ +12V SP490 DRIVER AC Characteristics Maximum Data Rate 5 Mbps Driver Input to Output 30 60 ns tPLH; RDIFF = 54Ω, CL = CL2 = 00pF; see figures 3 and 6 Driver Input to Output 30 60 ns tPHL; RDIFF = 54Ω, CL = CL2 = 00pF; see figures 3 and 6 Driver Skew 5 ns see figures 3 and 6, tSKEW = | tDPLH - tDPHL | Driver Rise or Fall Time 5 40 ns From 0% to 90%; RDIFF = 54Ω, CL = CL2 = 00pF; see figures 3 and 6 SP490 RECEIVER DC Characteristics Differential Input Threshold 0.2 +0.2 Volts -7V ≤ V CM ≤ 12V Input Hysteresis 70 mV VCM = 0V Output Voltage High 3.5 Volts IO = -4mA, VID = +200mV Output Voltage Low 0.4 Volts IO = +4mA, VID = -200mV Input Resistance 12 15 kΩ -7V ≤ V CM ≤ 12V Input Current (A, B); VIN = 2V ±.0 mA VIN = 2V Input Current (A, B); VIN = -7V -0.8 mA VIN = -7V Short-Circuit Current 85 mA 0V ≤ VO ≤ VCC

ELECTRICAL CHARACTERISTICS

TMIN to TMAX and VCC = 5V ± 5% unless otherwise noted.

Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (50)668-707 • www.exar.com SP490,49_00_07408 TMIN to TMAX and VCC = 5V ± 5% unless otherwise noted. PARAMETERS MIN. TYP. MAX. UNITS CONDITIONS SP490 RECEIVER AC Characteristics Maximum Data Rate 5 Mbps Receiver Input to Output 90 50 ns tPLH; RDIFF = 54Ω, CL = CL2 = 00pF; Figures 3 & 8 Receiver Input to Output 90 50 ns tPHL; RDIFF = 54Ω, CL = CL2 = 00pF; Figures 3 & 8 Diff. Receiver Skew ItPLH-tPHLI 3 ns RDIFF = 54Ω; CL = CL2 = 00pF; Figures 3 & 8 POWER REQUIREMENTS Supply Voltage +4.75 +5.25 Volts Supply Current 900 µA ENVIRONMENTAL AND MECHANICAL Operating Temperature Commercial (C_) 0 +70 °C Industrial (E_) -40 +85 °C Storage Temperature -65 +50 °C Package Plastic DIP (_S) NSOIC (_N) Figure 3. Driver/Receiver Timing Test Circuit Figure 4. Driver Timing Test Load #2 Circuit

Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (50)668-707 • www.exar.com SP490,49_00_07408 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. 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 VCC Volts Unloaded; R = ∞ ; see figure 1 Differential Output Voltage 2 VCC Volts With Load; R = 50Ω; (RS422); see figure 1 Differential Output Voltage .5 VCC Volts With Load; R = 27Ω; (RS485); see figure 1 Change in Magnitude of Driver Differential Output Voltage for Complimentary States 0.2 Volts R = 27Ω or R = 50Ω; see figure 1 Driver Common-Mode Output Voltage 3 Volts R = 27Ω 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 ±0 µA Applies to D, REB, DE Driver Short-Circuit Current VOUT = HIGH 35 250 mA -7V ≤ V O ≤ 12V VOUT = LOW 35 250 mA -7V ≤ V O ≤ 12V SP491 DRIVER AC Characteristics Maximum Data Rate 5 Mbps REB = 5V, DE = 5V Driver Input to Output 20 30 60 ns tPLH; RDIFF = 54Ω, CL = CL2 = 00pF; see figures 3 and 6 Driver Input to Output 20 30 60 ns tPHL; RDIFF = 54Ω, CL = CL2 = 00pF; see figures 3 and 6 Driver Skew 5 0 ns see figures 3 and 6, tSKEW = | tDPLH - tDPHL | Driver Rise or Fall Time 3 5 40 ns From 0% to 90%; RDIFF = 54Ω, CL = CL2 = 00pF; see figures 3 and 6 Driver Enable to Output High 40 70 ns CL = CL2 = 00pF; see figures 4 and 7; S2 closed Driver Enable to Output Low 40 70 ns CL = CL2 = 00pF; see figures 4 and 7; S closed Driver Disable Time from Low 40 70 ns CL = CL2 = 00pF; see figures 4 and 7; S closed Driver Disable Time from High 40 70 ns CL = CL2 = 00pF; see figures 4 and 7; S2 closed

Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (50)668-707 • www.exar.com SP490,49_00_07408 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 ≤ V CM ≤ 12V Input Hysteresis 70 mV VCM = 0V Output Voltage High 3.5 Volts IO = -4mA, VID = +200mV Output Voltage Low 0.4 Volts IO = +4mA, VID = -200mV Three State (high impedance) Output Current ±1 µA 0.4V ≤ VO ≤ 2.4V; REB = 5V Input Resistance 12 15 kΩ -7V ≤ V CM ≤ 12V Input Current (A, B); VIN = 2V ±.0 mA DE = 0V, VCC = 0V or 5.25V, VIN = 2V Input Current (A, B); VIN = -7V -0.8 mA DE = 0V, VCC = 0V or 5.25V, VIN = -7V Short-Circuit Current 7 85 mA 0V ≤ VO ≤ VCC SP491 RECEIVER AC Characteristics Maximum Data Rate 5 Mbps REB = 0V Receiver Input to Output 60 90 50 ns tPLH; RDIFF = 54Ω, CL = CL2 = 00pF; Figures 3 & 8 Receiver Input to Output 60 90 50 ns tPHL; RDIFF = 54Ω, CL = CL2 = 00pF; Figures 3 & 8 Diff. Receiver Skew ItPLH-tPHLI 3 ns RDIFF = 54Ω; CL = CL2 = 00pF; Figures 3 & 8 Receiver Enable to Output Low 20 50 ns CRL = 5pF; Figures 2 and 9; S closed Receiver Enable to Output High 20 50 ns CRL = 5pF; Figures 2 and 9; S2 closed Receiver Disable from Low 20 50 ns CRL = 5pF; Figures 2 and 9; S closed Receiver Disable from High 20 50 ns CRL = 5pF; 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 AND MECHANICAL Operating Temperature Commercial (C_) 0 +70 °C Industrial (E_) -40 +85 °C Storage Temperature -65 +50 °C Package Plastic DIP (_S) NSOIC (_N) Figure 9. Receiver Enable and Disable Times

Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (50)668-707 • www.exar.com SP490,49_00_07408 The SP490 and SP491 are full-duplex differen- tial 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 +2V) com - mon 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 .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 sensitiv- ity as low as ±200mV. Input impedance of the receivers is typically 15kΩ (12kΩ minimum). A wide common mode range of -7V to +2V 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 re - ceiver.

Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (50)668-707 • www.exar.com SP490,49_00_07408 PACKAGE: 8 PIN NSOIC A A1 A2 SIDE VIEW Seating Plane SECTION B-B WITH PLA TING SYMBOL MIN NOM MAX A 1.35 - 1.75 A1 0.1 - 0.25 A2 1.25 - 1.65 b 0.31 - 0.51 c 0.17 - 0.24 D E e L 0.4 - 1.27 ø 0º - 8º ø1 5º - 15º Note: Dimensions in (mm)

8 Pin NSOIC JEDEC MO-012 (AA) Variation

4.90 BSC

6.00 BSC

3.90 BSC

1.27 BSC

1.04 REF

0.25 BSC

L ØØ 1 Ø Seating Plane VIEW C T OP VIEW b SEE VIEW C B B E E/2 INDEX AREA (D/2 X E1/2) E1/2 D e c BASE MET AL b

Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (50)668-707 • www.exar.com SP490,49_00_07408 PACKAGE: 14 PIN NSOIC TOP VIEW b Gauge PlaneL1 L ØØ1 Ø Seating Plane VIEW C SEE VIEW C B B SECTION B-B WITH PLA TING c BASE MET AL b A A1 SYMBOL MIN NOM MAX A 1.35 - 1.75 A1 0.1 - 0.25 A2 1.25 - 1.65 b 0.31 - 0.51 c 0.17 - 0.25 D E e L 0.4 - 1.27 ø 0º - 8º ø1 5º - 15º Note: Dimensions in (mm)

14 Pin NSOIC JEDEC MO-012 (AB) Variation

8.65 BSC

E E/2 INDEX AREA (D/2 X E1/2) E1/2 D e SIDE VIEW Seating Plane

Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (50)668-707 • www.exar.com SP490,49_00_07408 PACKAGE: 8 PIN PDIP INDEX AREA b N 1 2 3 N/2 c eA eB E SYMBOL MIN NOM MAX A - - 0.21 A1 0.15 - - A2 0.115 0.13 0.195 b 0.014 0.018 0.022 b2 0.045 0.06 0.07 b3 0.3 0.039 0.045 c 0.008 0.01 0.014 D 0.355 0.365 0.4 D1 0.005 - - E 0.3 0.31 0.325 E1 0.24 0.25 0.28 e eA eB - - 0.43 L 0.115 0.13 0.15 Note: Dimensions in (mm) .100 BSC .300 BSC

8 PIN PDIP JEDEC MS-001 (BA) Variation

D A L b e c

Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (50)668-707 • www.exar.com SP490,49_00_07408 PACKAGE: 14 PIN PDIP INDEX AREA b N 1 2 3 N/2 c eA eB E c SYMBOL MIN NOM MAX A - - 0.21 A1 0.15 - - A2 0.115 0.13 0.195 b 0.014 0.018 0.022 b2 0.045 0.06 0.07 b3 0.3 0.039 0.045 c 0.008 0.01 0.014 D 0.735 0.75 0.755 D1 0.005 - - E 0.3 0.31 0.325 E1 0.24 0.25 0.28 e eA eB - - 0.43 L 0.115 0.13 0.15 Note: Dimensions in (mm) .100 BSC .300 BSC

14 PIN PDIP JEDEC MS-001 (AA) Variation

D A L b e

Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (50)668-707 • www.exar.com SP490,49_00_07408 Model Temperature Range Package Available in lead free packaging. To order add "-L" suffix to part number. Example: SP49CN/TR = standard; SP49CN-L/TR = lead free /TR = Tape and Reel Pack quantity is 2500 for NSOIC.

ORDERING INFORMATION

EXAR Corporation reserves the right to make changes to any products contained in this publication in order to improve design, performance or reliabil- ity. EXAR Corporation assumes no representation that the circuits are free of patent infringement. Charts and schedules contained herein are only for illustration purposes and may vary depending upon a user's specific application. While the information in this publication has been carefully checked; no responsibility, however, is assumed for inaccuracies. EXAR Corporation does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reasonably be expected to cause failure of the life support system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications unless EXAR Corporation receives, in writting, assurances to its satisfaction that: (a) the risk of injury or damage has been minimized ; (b) the user assumes all such risks; (c) potential liability of EXAR Corporation is adequately protected under the circumstances. Copyright 2008 EXAR Corporation Datasheet June 2008 Send your Interface technical inquiry with technical details to: uarttechsupport@exar.com Reproduction, in part or whole, without the prior written consent of EXAR Corporation is prohibited.

REVISION HISTORY

02/24/05 - Sipex Legacy Data Sheet 07/4/08 .0.0 Convert to Exar format.