SP491EEN-L/TR - MaxLinear, Inc.

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Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (510)668-7017 • www.exar.com SP490E,491E_101_052413

FEATURES

• +5V Only

• Low Power BiCMOS

• Driver/Receiver Enable (SP491E)

• RS-485 and RS-422 Drivers/Receivers

• Pin Compatible with LTC490 and

SN75179 (SP490E)

• Pin Compatible with LTC491 and

SN75180 (SP491E)

• Improved ESD Specications:

±15kV Human Body Model

±15kV IEC61000-4-2 Air Discharge

The SP490E is a low power differential line driver/receiver meeting RS-485 and RS-422

standards up to 10Mbps. The SP491E is identical to the SP490E with the addition of driver

and receiver tri-state enable lines. Both products feature ±200mV receiver input sensitivity,

over wide common mode range. The SP490E is available in 8-pin plastic DIP and 8-pin

NSOIC packages for operation over the commercial and industrial temperature ranges.

The SP491E is available in 14-pin DIP and 14-pin NSOIC packages for operation over the

commercial and industrial temperature ranges.

SP490E SP491E

DESCRIPTION

BLOCK DIAGRAMS

Now Available in Lead Free Packaging

Enhanced Full Duplex RS-485 Transceivers

SP490E/491E

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Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (510)668-7017 • www.exar.com SP490E,491E_101_052413

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 specications 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

PARAMETERS MIN. TYP. MAX. UNITS CONDITIONS

SP490E DRIVER

DC Characteristics

Differential Output Voltage GND VCC Volts Unloaded; R = ∞ ; see gure 1

Differential Output Voltage 2 VCC Volts With Load; R = 50Ω; (RS422);

see gure 1

Differential Output Voltage 1.5 VCC Volts With Load; R = 27Ω; (RS485);

see gure 1

Change in Magnitude of Driver

Differential Output Voltage for

Complimentary States 0.2 Volts R = 27Ω or R = 50Ω; see gure 1

Driver Common-Mode

Output Voltage 3 Volts R = 27Ω or R = 50Ω; see gure 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

VOUT = HIGH 250 mA -7V ≤ VO ≤ +12V

VOUT = LOW 250 mA -7V ≤ VO ≤ +12V

SP490E DRIVER

AC Characteristics

Maximum Data Rate 10 Mbps

Driver Input to Output 30 60 ns tPLH; RDIFF = 54Ω, CL1 = CL2 = 100pF;

see gures 3 and 5

Driver Input to Output 30 60 ns tPHL; RDIFF = 54Ω, CL1 = CL2 = 100pF;

see gures 3 and 5

Driver Skew 5 ns see gures 3 and 5,

tSKEW = | tDPLH - tDPHL |

Driver Rise or Fall Time 15 40 ns From 10% to 90%; RDIFF = 54Ω,

CL1 = CL2 = 100pF; see gures 3 and 5

SP490E RECEIVER

DC Characteristics

Differential Input Threshold -0.2 +0.2 Volts -7V ≤ VCM ≤ 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 ≤ VCM ≤ 12V

Input Current (A, B); VIN = 12V ±1.0 mA VIN = 12V

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.

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Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (510)668-7017 • www.exar.com SP490E,491E_101_052413

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

PARAMETERS MIN. TYP. MAX. UNITS CONDITIONS

SP490E RECEIVER

AC Characteristics

Maximum Data Rate 10 Mbps

Receiver Input to Output 20 45 100 ns tPLH; RDIFF = 54Ω,

CL1 = CL2

= 100pF; Figures 3 & 7

Receiver Input to Output 20 45 100 ns tPHL; RDIFF = 54Ω,

CL1 = CL2

= 100pF; Figures 3 & 7

Diff. Receiver Skew ItPLH-tPHLI 13 ns RDIFF = 54Ω; CL1 = CL2 = 100pF;

Figures 3 & 7

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 +150 °C

Package

Plastic DIP (_P)

NSOIC (_N)

Figure 3. Driver/Receiver Timing Test Circuit Figure 4. Driver Timing Test Load #2 Circuit

Figure 1. Driver DC Test Load Circuit Figure 2. Receiver Timing Test Load Circuit

ELECTRICAL CHARACTERISTICS

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Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (510)668-7017 • www.exar.com SP490E,491E_101_052413

Figure 5. Driver Propagation Delays

Figure 6. Driver Enable and Disable Times

Figure 7. Receiver Propagation Delays

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Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (510)668-7017 • www.exar.com SP490E,491E_101_052413

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 specications 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

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

PARAMETERS MIN. TYP. MAX. UNITS CONDITIONS

SP491E DRIVER

DC Characteristics

Differential Output Voltage GND VCC Volts Unloaded; R = ∞ ; see gure 1

Differential Output Voltage 2 VCC Volts With Load; R = 50Ω; (RS422);

see gure 1

Differential Output Voltage 1.5 VCC Volts With Load; R = 27Ω; (RS485);

see gure

Change in Magnitude of Driver

Differential Output Voltage for

Complimentary States 0.2 Volts R = 27Ω or R = 50Ω; see gure 1

Driver Common-Mode

Output Voltage 3 Volts R = 27Ω or R = 50Ω; see gure 1

Input High Voltage 2.0 Volts Applies to D, RE, DE

Input Low Voltage 0.8 Volts Applies to D, RE, DE

Input Current ±10 µA Applies to D, RE, DE

Driver Short-Circuit Current

VOUT = HIGH 250 mA -7V ≤ VO ≤ 12V

VOUT = LOW 250 mA -7V ≤ VO ≤ 12V

SP491E DRIVER

AC Characteristics

Maximum Data Rate 10 Mbps RE = 5V, DE = 5V

Driver Input to Output 30 60 ns tPLH; RDIFF = 54Ω, CL1 = CL2 = 100pF;

see gures 3 and 5

Driver Input to Output 30 60 ns tPHL; RDIFF = 54Ω, CL1 = CL2 = 100pF;

see gures 3 and 5

Driver Skew 5 10 ns see gures 3 and 5,

tSKEW = | tDPLH - tDPHL |

Driver Rise or Fall Time 15 40 ns From 10% to 90%; RDIFF = 54Ω,

CL1 = CL2 = 100pF; see gures 3 and 5

Driver Enable to Output High 40 70 ns CL1 = CL2 = 100pF; see gures

4 and 6; S2 closed

Driver Enable to Output Low 40 70 ns CL1 = CL2 = 100pF; see gures

4 and 6; S1 closed

Driver Disable Time from Low 40 70 ns CL1 = CL2 = 100pF; see gures

4 and 6; S1 closed

Driver Disable Time from High 40 70 ns CL1 = CL2 = 100pF; see gures

4 and 6; S2 closed

ELECTRICAL CHARACTERISTICS

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Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (510)668-7017 • www.exar.com SP490E,491E_101_052413

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

PARAMETERS MIN. TYP. MAX. UNITS CONDITIONS

SP491E RECEIVER

DC Characteristics

Differential Input Threshold -0.2 +0.2 Volts -7V ≤ VCM ≤ 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; RE = 5V

Input Resistance 12 15 kΩ -7V ≤ VCM ≤ 12V

Input Current (A, B); VIN = 12V ±1.0 mA DE = 0V, VCC = 0V or 5.25V, VIN = 12V

Input Current (A, B); VIN = -7V -0.8 mA DE = 0V, VCC = 0V or 5.25V, VIN = -7V

Short-Circuit Current 85 mA 0V ≤ VO ≤ VCC

SP491E

RECEIVER

AC Characteristics

Maximum Data Rate 10 Mbps RE = 0V

Receiver Input to Output 20 45 100 ns tPLH; RDIFF = 54Ω,

CL1 = CL2

= 100pF; Figures 3 & 7

Receiver Input to Output 20 45 100 ns tPHL; RDIFF = 54Ω,

CL1 = CL2

= 100pF; Figures 3 & 7

Diff. Receiver Skew ItPLH-tPHLI 13 ns RDIFF = 54Ω; CL1 = CL2 = 100pF;

Figures 3 & 7

Receiver Enable to Output Low

45 70 ns CRL = 15pF; Figures 2 and 8; S1 closed

Receiver Enable to Output High

45 70 ns CRL = 15pF; Figures 2 and 8; S2 closed

Receiver Disable from Low

45 70 ns CRL = 15pF; Figures 2 and 8; S1 closed

Receiver Disable from High

45 70 ns CRL = 15pF; Figures 2 and 8; S2 closed

POWER REQUIREMENTS

Supply Voltage +4.75 +5.25 Volts

Supply Current 900 µA RE, D = 0V or VCC; DE = VCC

SP491E ENVIRONMENTAL

AND MECHANICAL

Operating Temperature

Commercial (_C_) 0 +70 °C

Industrial (_E_) -40 +85 °C

Storage Temperature -65 +150 °C

Package

Plastic DIP (_P)

NSOIC (_N)

Figure 8. Receiver Enable and Disable Times

ELECTRICAL CHARACTERISTICS

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Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (510)668-7017 • www.exar.com SP490E,491E_101_052413

DESCRIPTION

The SP490E and SP491E a r e

fu ll - du pl e x d iffe re n ti al t ra nsc ei v -

ers that meet the requirements of

RS-485 and RS-422. Fabricated with a Exar

proprietary BiCMOS process, both products

require a fraction of the power of older bi-

polar 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) 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 SP490E and SP491E

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 SP491E has a driver enable

control line which is active high. A logic high

on DE (pin 4) of the SP491E will enable

the differential driver outputs. A logic low

on DE (pin 4) of the SP491E will tri-state the

driver outputs. The SP490E does not have

a driver enable.

Receiver...

The receivers for both the SP490E and

SP491E 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 be-

tween systems. The receivers for both the

SP490E and SP491E 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 SP491E has a receiver

enable control line which is active low. A logic

low on REB (pin 3) of the SP491E will enable

the differential receiver. A logic high on REB

(pin 3) of the SP491E will tri-state the re-

ceiver.

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Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (510)668-7017 • www.exar.com SP490E,491E_101_052413

PACKAGE: 8 PIN NSOIC

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Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (510)668-7017 • www.exar.com SP490E,491E_101_052413

PACKAGE: 14 PIN NSOIC

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Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (510)668-7017 • www.exar.com SP490E,491E_101_052413

PACKAGE: 8 PIN PDIP

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Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (510)668-7017 • www.exar.com SP490E,491E_101_052413

PACKAGE: 14 PIN PDIP

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Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (510)668-7017 • www.exar.com SP490E,491E_101_052413

Model Temperature Range Package

SP490ECN-L. .................................................................................0˚C to +70˚C ............................................................................... 8-Pin NSOIC

SP490ECN-L/TR ............................................................................ 0˚C to +70˚C ............................................................................... 8-Pin NSOIC

SP490ECP-L ..................................................................................0˚C to +70˚C .................................................................................8-Pin PDIP

SP490EEN-L ................................................................................ -40˚C to +85˚C .............................................................................. 8-Pin NSOIC

SP490EEN-L/TR .......................................................................... -40˚C to +85˚C .............................................................................. 8-Pin NSOIC

SP490EEP-L ................................................................................ -40˚C to +85˚C ................................................................................8-Pin PDIP

SP491ECN-L ..................................................................................0˚C to +70˚C .............................................................................. 14-Pin NSOIC

SP491ECN-L/TR ............................................................................ 0˚C to +70˚C .............................................................................. 14-Pin NSOIC

SP491ECP-L ..................................................................................0˚C to +70˚C ................................................................................14-Pin PDIP

SP491EEN-L ................................................................................ -40˚C to +85˚C ............................................................................. 14-Pin NSOIC

SP491EEN-L/TR .......................................................................... -40˚C to +85˚C ............................................................................. 14-Pin NSOIC

SP491EEP-L ................................................................................ -40˚C to +85˚C ...............................................................................14-Pin PDIP

Note: /TR = Tape and Reel

ORDERING INFORMATION

Notice

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 specic 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 signicantly 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.

Datasheet May 2013

Send your serial transceiver technical inquiry with technical details to: serialtechsupport@exar.com

Reproduction, in part or whole, without the prior written consent of EXAR Corporation is prohibited.

REVISION HISTORY

Date Revision Description

2000 14 Sipex Legacy Data Sheet

May 2011 1.0.0 Convert to Exar format. Remove driver propagation delay minimum and

driver rise/fall time minimum entry for SP490E and SP491E. Update

ESD rating to IEC61000-4-2. Update ordering information.

May 2013 1.0.1 Correct type errors per PCN 13-0503-01

ECN: 1322-03 05/29/13