Datasheet SP3490, SP3491 Datasheet (Sipex)

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SP3490/SP3491

+3.3V Low Power Full Duplex RS-485

Transceivers with 10Mbps Data Rate

■ Full Duplex RS-485 and RS-422 Transceivers

■ Operates from a single +3.3V supply

■ Interoperable with +5.0V logic

■ Driver/Receiver Tri-state Enable

Lines (SP3491)

■ -7V to +12V Common-Mode Input Voltage Range

■

+200mV Receiver Input Sensitivity

■ Allows up to 32 transceivers on the serial bus

■ Compatibility with LTC490 and SN75179 (SP3490)

■ Compatibility with LTC491 and SN75180 (SP3491)

DESCRIPTION

The SP3490 and the SP3491 are +3.3V low power full duplex transceivers that meet the specifications of the RS-485 and RS-422 serial protocols. These devices are pin-to-pin compatible with the Sipex SP490 and SP491 devices as well as popular industry standards. The SP3490 and the SP3491 feature Sipex's BiCMOS process, allowing low power operation without sacrificing performance. The SP3490 and SP3491 meet the electrical specifications of RS-485 and RS-422 serial protocols up to 10Mbps under load. The SP3491 is identical to the SP3490 with the addition of driver and receiver tri-state enable lines.

14 13 12

11

10

Vcc NC A

B

Z

9

Y NC

8

Vcc

GND

NC

1

2

REB

GND

DE

R

3 4

5

D

6 7

R

D

1 2

R

3

D

4

R

D

8

A

7

B

6

Z

5

Y

SP3490 SP3491

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 ................................................... -65˚C to +150˚

Power Dissipation per Package

8-pin NSOIC (derate 6.90mW/oC above +70oC) ..................... 600mW

8-pin PDIP (derate 11.8mW/oC above +70oC) ...................... 1000mW

14-pin NSOIC (derate 8.33mW/oC above +70oC) ................... 700mW

14-pin PDIP (derate 14.3mW/oC above +70oC) .................... 1200mW

SPECIFICATIONS

T

= T

to T

AMB

PARAMETERS MIN. TYP. MAX. UNITS CONDITIONS SP3490 DRIVER

DC Characteristics

Differential Output Voltage GND V Differential Output Voltage 2 V

Differential Output Voltage 1.5 V Change in Magnitude of Driver Differential Output Voltage for Complimentary States 0.2 Volts R = 27Ω or R = 50Ω; Driver Common-Mode Output Voltage 3 Volts R = 27Ω or R = 50Ω; Input High Voltage 2.0 Volts Input Low Voltage 0.8 Volts Input Current +10 µA Driver Short-Circuit Current V V

and VCC = 3.3V ± 5% unless otherwise noted.

MIN

MAX

Volts Unloaded; R = ∞ Ω;

CC

Volts With Load; R = 50Ω; (RS-422);

CC

Volts W

CC

= HIGH +250 mA -7V < VO < +12V

OUT

= LOW +250 mA -7V < VO < +12V

OUT

Figure 1

ith Load; R = 27Ω; (RS-485);

Figure 1

Figure 1 Figure 1

Figure 1

SP3490 DRIVER AC Characteristics

Maximum Data Rate 10 Mbps Driver Input to Output, t

Driver Input to Output, t

PLH

PHL

Differential Driver Skew 2 ns t Driver Rise or Fall Time 5 20 ns From 10% to 90%;

SP3490

RECEIVER

20 40 60 ns R=27Ω, 20 40 60 ns R=27Ω,

(Y) - t

PHL

Figures 2 and 8

Figures 2 and 8 Figures 2 and 8

PLH

(Y) , t

PHL

(Z) - t

Figures 3 and 9

PLH

(Z) ,

DC Characteristics

Differential Input Threshold 0.2 +0.2 Volts -7V < V Input Hysteresis 25 mV VCM = 0V

CM

< 12V

Output Voltage High VCC-0.4 Volts IO = -1.5mA, VID = +200mV Output Voltage Low 0.4 Volts IO = +2.5mA, VID = -200mV Input Resistance 12 15 kΩ -7V < V Input Current (A, B); VIN = 12V 1.0 mA VIN = 12V

CM

≤ 12V

Input Current (A, B); VIN = -7V -0.8 mA VIN = -7V Short-Circuit Current 60 mA 0V < VO < V

CC

2

SPECIFICATIONS (continued)

T

= T

to T

AMB

PARAMETERS MIN. TYP. MAX. UNITS CONDITIONS SP3490 RECEIVER AC Characteristics

Maximum Data Rate 10 Mbps Receiver Input to Output, t

Receiver Input to Output, t

Differential Receiver Skew 4 ns t

POWER REQUIREMENTS

Supply Voltage +3.0 +3.6 Volts Supply Current 1000 2000 µA DE = V

V

Figure 1. Driver DC Test Load Circuit

GENERATOR (NOTE 1)

and VCC = 3.3V ± 5% unless otherwise noted.

MIN

MAX

V

D

CC

50Ω

OD

D

V

CC

40 70 120 ns

PLH

40 70 120 ns

PHL

800 1500 DE = 0

R

OC

V

C

L

RL = 60Ω

L

= 15pF (NOTE 2)

C

OUT

85 ns T

= 25oC, VCC = 3.3V,

AMB

Figures 6 and 11

85 ns T

GENERATOR (NOTE 1)

= 25oC, VCC = 3.3V,

AMB

(A) - t

PHL

Figures 6 and 11

50Ω

Figure 2. Driver Propagation Delay Test Circuit

D

GENERATOR (NOTE 1)

50Ω

PLH

CC

D

V

CC

OM

= 1.5V

V

L

C (NOTE 2)

OM

V

= 50pF

(A) , t

(B) - t

PHL

V

S1

VOH + V

OL

2

S1

VOH + V

OL

= 1.5V

2

Figures 6 and 11

(B) ,

PLH

DM

RL = 27Ω

OUT

C

L

= 15pF

(NOTE 2)

OUT

R

L

= 110Ω

Figure 3. Driver Differential Output Delay and Transition Time Circuit

V

CC

L

= 110Ω

R

OUT

0V OR 3V

GENERATOR (NOTE 1)

50Ω

S1

D

L

= 50pF

C (NOTE 2)

Figure 5. Driver Enable and Disable Timing Circuit,

Figure 4. Driver Enable and Disable Timing Circuit, Output HIGH

GENERATOR (NOTE 1)

1.5V 0V

50Ω

ID

V

OUT

R

L

= 15pF

C (NOTE 2)

V

OM

= V

CC

2

Figure 6. Receiver Propagation Delay Test Circuit

Output LOW

3

3V

INPUT

1.5V

0V

t

VOM =

PLH

V

t

PHL

V

OH

+ V

V

2

S3

1.5V

-1.5V

GENERATOR (NOTE 1)

V

ID

R

50Ω

C

L =

(NOTE 2)

1k

15pF

S1

S2

CC

V

Y OUTPUT

OH

V

OL

V

OH

Z OUTPUT

V

OL

OM

OL

≈ 1.5V

t

PHL

V

t

PLH

V

Figure 7. Receiver Enable and Disable Timing Circuit Figure 8. Driver Propagation Delay Waveforms

OM

IN

OUT

1.5V

DPLH

t

50%

10%

R

t

90%

1.5V

90%

DPHL

t

50%

10%

t

F

Figure 9. Driver Differential Output Delay and Transition Time Waveforms

INPUT

OUTPUT

3V

1.5V

0V

t

CC

V

RPLH

t

RPHL

V

OM

V

0V

V

CC

OM

=

V

2

3V

VOM

V

OM

t

≈ 1.5V

1.5V

PHZ

0.25V

tPLZ

0.25V

3V

0V

2.0V

DE

OUTPUT

HIGH

0V

V

0V

VCC

-2.0V

OUTPUT

LOW

V

1.5V

tPZH

OH

tPZL

OL

OH + VOL

V

OM =

V

2

Figure 10. Driver Enable and Disable Timing Waveforms

OM

Figure 11. Receiver Propagation Delay Waveforms

4

SPECIFICATIONS

T

= T

to T

AMB

PARAMETERS MIN. TYP. MAX. UNITS CONDITIONS SP3491 DRIVER

DC Characteristics

Differential Output Voltage GND V Differential Output Voltage 2 V

Differential Output Voltage 1.5 V Change in Magnitude of Driver Differential Output Voltage for Complimentary States 0.2 Volts R = 27Ω or R = 50Ω; Driver Common-Mode Output Voltage 3 Volts R = 27Ω or R = 50Ω; 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 V

SP3491 DRIVER AC Characteristics

Maximum Data Rate 10 Mbps Driver Input to Output, t

Driver Input to Output, t Differential Driver Skew 2 ns t

and VCC = +3.3V ± 5% unless otherwise noted.

MIN

MAX

Volts Unloaded; R = ∞;

CC

Volts With Load; R = 50Ω; (RS-422);

CC

Volts

CC

= HIGH +250 mA -7V < VO < +12V

OUT

= LOW +250 mA -7V < VO < +12V

OUT

PLH

PHL

20 40 60 ns 20 40 60 ns

Figure 1

With Load; R = 27Ω; (RS-485);

Figures 2 and 8 Figures 2 and 8

(Y) - t

PHL

Figures 2 and 8

PLH

(Y) , t

Figure 1

Figure 1 Figure 1

(Z) - t

PHL

Figure 1

(Z) ,

PLH

Driver Rise or Fall Time 5 20 ns From 10% to 90%; Driver Enable to Output HIGH 52 120 ns Driver Enable to Output LOW 60 120 ns Driver Disable from LOW 40 120 ns Driver Disable from HIGH

60 120 ns

Figures 4 and 10 Figures 5 and 10 Figures 5 and 10 Figures 4 and 10

Figures 3 and 9

NOTE 1: The input pulse is supplied by a generator with the following characteristics: PRR=250KHz, 50% duty cycle, tr < 6.0ns, Z0=50Ω. NOTE 2: CL includes probe and stray capacitance.

5

SPECIFICATIONS (continued)

T

= T

to T

AMB

PARAMETERS MIN. TYP. MAX. UNITS CONDITIONS SP3491

DC Characteristics

Differential Input Threshold -0.2 +0.2 Volts -7V < V Input Hysteresis 25 mV VCM = 0V Output Voltage HIGH VCC-0.4 Volts IO = -1.5mA, VID = +200mV Output Voltage LOW 0.4 Volts IO = +2.5mA, VID = -200mV Three State (high impedance) Output Current +1 µA 0V < VO < VCC; REB = V Input Resistance 12 15 kΩ -7V < V Input Current (A, B); VIN = 12V 1.0 mA DE = 0V, VCC = 0V or +3.6V, VIN = 12V Input Current (A, B); VIN = -7V -0.8 mA DE = 0V, VCC = 0V or +3.6V, VIN = -7V Short-Circuit Current 60 mA 0V < VO < V

SP3491 AC Characteristics

Maximum Data Rate 10 Mbps REB = 0V, DE = V Receiver Input to Output, t

and VCC = +3.3V ± 5% unless otherwise noted.

MIN

MAX

RECEIVER

PLH

40 70 120 ns

85 ns T

< 12V

CM

< 12V

CM

CC

Figures 6 & 11

= +25oC, VCC = +3.3V,

AMB

Figures 6 and 11

CC

Receiver Input to Output, t

Differential Receiver Skew 4 ns t

Receiver Enable to Output LOW Receiver Enable to Output HIGH Receiver Disable from LOW Receiver Disable from HIGH

40 70 120 ns

PHL

65 150 ns 65 150 ns 65 200 ns 65 200 ns

85 ns T

Figures 6 & 11

= +25oC, VCC = +3.3V,

AMB

Figures 6 and 11

(A) - t

PHL

Figures 6 & 11

PLH

(A) , t

Figures 7 and 12; Figures 7 and 12; Figures 7 and 12; Figures 7 and 12;

(B) - t

PHL

S1 closed, S2 open S2 closed, S1 open S1 closed, S2 open S

closed, S1 open

2

POWER REQUIREMENTS

Supply Voltage +3.0 +3.6 Volts Supply Current 1000 2000 µA REB, D = 0V or VCC; DE = V

800 1500 µA DE=0V

S1 is closed S2 is open S3 = -1.5V

1.5V

t

PRLZ

10%

1.5V

t

PRZL

tPRSL

1.5V

REB

OUTPUT

V

0V

3V

0V

S1 is open S2 is closed S3 = 1.5V

3V

1.5V

REB

0V

t

PRHZ

OH

10%

PRZH

t

PRSH

1.5V

OUTPUT

V

CC

VOL

PLH

(B) ,

CC

Figure 12. Receiver Enable and Disable Waveforms

6

PIN FUNCTION - SP3490

1

Vcc

2

R

3

D

4

GND

Figure 13. Pinout for the SP3490

1

NC

2

R

3

REB

4

DE

5

D

GND

6

GND

7

Figure 14. Pinout for the SP3491

R

D

R

D

14 13 12

11

10

Pin 1 - VCC - Positive supply +3.00 < VCC < +3.60

8

A

Pin 2 - R - Receiver output. Pin 3 - D - Driver input.

7

B

6

Z

Pin 4 - GND - Ground connection. Pin 5 - Y - Non-inverting driver output. Pin 6 - Z - Inverting driver output.

5

Y

Pin 7 - B - Inverting receiver input. Pin 8 - A - Non-inverting receiver input.

PIN FUNCTION - SP3491

Vcc NC A

B

Z

Y

9

NC

8

Pin 1 - NC - No connect. Pin 2 - R - Receiver output. Pin 3 - REB - Receiver output enable active LOW. Pin 4 - DE - Driver output enable active HIGH. Pin 5 - D - Driver input. Pin 6 - GND - Ground connection. Pin 7 - GND - Ground connection. Pin 8 - NC - No connect. Pin 9 - Y - Non-inverting driver output. Pin 10 - Z - Inverting driver output. Pin 11 - B - Inverting receiver input. Pin 12 - A - Non-inverting receiver input. Pin 13 - NC - No connect. Pin 14 - V

- Positive supply +3.00 < VCC< +3.60

CC

7

DESCRIPTION

The SP3490 and the SP3491 are two members in the family of +3.3V low power full duplex transceivers that meet the electrical specifications of the RS-485 and RS-422 serial protocols. These devices are pin-to-pin compatible with the Sipex SP490 and the SP491 devices as well as popular industry standards. The SP3490 and the SP3491 feature Sipex's BiCMOS process allowing low power operation without sacrificing performance.

Driver

The drivers for both the SP3490 and SP3491 have differential outputs. The typical voltage output swing with no load will be 0 volts to V With a load of 54Ω across the differential

CC.

outputs, the driver maintains greater than 1.5V voltage levels.

The driver of the SP3491 has a driver enable control line which is active high. A logic high on DE (pin 4) of the SP3491 will enable the differential driver outputs. A logic low on DE (pin 4) of the SP3491 will tri-state the driver outputs. The SP3490 does not have a driver enable.

Receiver

The receivers for the SP3490 and SP3491 have differential inputs with an input sensitivity as low as ±100mV. Input impedance of the receivers is typically 15kΩ (12k Ω minimum). A wide common mode range of -7V to +12V allows for large ground potential differences between systems. The receivers for both the SP3490 and SP3491 are equipped with a fail-safe feature that guarantees the receiver output will be in a high state when the input is left unconnected.

The receiver of the SP3491 has a receiver enable control line which is active low. A logic low on REB (pin 3) of the SP3491 will enable the differential receiver. A logic high on REB (pin 3) of the SP3491 will tri-state the receiver.

8

D1 = 0.005" min.

(0.127 min.)

D

e = 0.100 BSC

(2.540 BSC)

B1

B

ALTERNATE

END PINS

(BOTH ENDS)

PACKAGE: PLASTIC

DUAL–IN–LINE (NARROW)

E1

E

A1 = 0.015" min.

(0.381min.)

A = 0.210" max.

(5.334 max).

A2

L

C

Ø

eA = 0.300 BSC

(7.620 BSC)

DIMENSIONS (Inches)

Minimum/Maximum

(mm)

A2

B

B1

C

D

E

E1

L

Ø

8–PIN 14–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°)

(2.921/4.953)

(0.356/0.559)

(1.143/1.778)

(0.203/0.356)

(18.669/19.685)

(7.620/8.255)

(6.096/7.112)

(2.921/3.810)

0.115/0.195

0.014/0.022

0.045/0.070

0.008/0.014

0.735/0.775

0.300/0.325

0.240/0.280

0.115/0.150

0°/ 15°

(0°/15°)

9

PACKAGE: PLASTIC

SMALL OUTLINE (SOIC) (NARROW)

EH

h x 45°

D

A

Ø

Be

A1

DIMENSIONS (Inches)

Minimum/Maximum

(mm) A

A1

B

D

E

e

H

h

L

Ø

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°)

L

14–PIN

0.053/0.069

(1.346/1.748)

0.004/0.010

(0.102/0.249)

0.013/0.020

(0.330/0.508)

0.337/0.344

(8.552/8.748)

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

ORDERING INFORMATION

Model Temperature Range Package

SP3490CN 0˚C to +70˚C 8-Pin NSOIC SP3490CP 0˚C to +70˚C 8-Pin DIP SP3490EN -40˚C to +85˚C 8-Pin NSOIC SP3490EP -40˚C to +85˚C 8-Pin DIP

SP3491CN 0˚C to +70˚C 14-Pin NSOIC SP3491CP 0˚C to +70˚C 14-Pin DIP SP3491EN. -40˚C to +85˚C 14-Pin NSOIC SP3491EP -40˚C to +85˚C 14-Pin DIP

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Please consult the factory for pricing and availability on a Tape-On-Reel option.

Corporation

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.

11

Datasheet SP3490, SP3491 Datasheet (Sipex)

Specifications and Main Features

Frequently Asked Questions

User Manual