Datasheet SP491EEN, SP491EEP, SP490ECP, SP490EEN, SP490EEP Datasheet (Sipex Corporation)

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Page 1

SP490E/SP491E

Enhanced Full Duplex RS-485 Transceivers

■ +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 Specifications:

±15kV Human Body Model ±15kV IEC1000-4-2 Air Discharge ±8kV IEC1000-4-2 Contact Discharge

DESCRIPTION…

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.

14 13 12

Vcc NC A

Y NC

Vcc

GND

REB

GND

3 4

6 7

1 2

SP490E SP491E

Page 2

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

Output Voltages

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

Power Dissipation.....................................................................1000mW

Drivers................................................-0.5V to (VCC+0.5V)

Receivers..................................................................±14V

Drivers......................................................................±14V

Receivers...........................................-0.5V to (VCC+0.5V)

SPECIFICATIONS

to T

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

MIN

MAX

PARAMETERS MIN. TYP. MAX. UNITS CONDITIONS SP490E 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 Input Low Voltage 0.8 Volts Applies to D Input Current ±10 µA Applies to D Driver Short-Circuit Current V

= HIGH ±250 mA -7V ≤ VO ≤ +12V

OUT

= LOW ±250 mA -7V ≤ VO ≤ +12V

OUT

Volts Unloaded; R = ∞;

Volts With Load; R = 50Ω; (RS-422);

Volts W

see Figure 1

ith Load; R = 27 Ω; (RS-485);

see Figure 1

see Figure 1 see Figure 1

SP490E DRIVER AC Characteristics

Maximum Data Rate 10 Mbps R Driver Input to Output 20 30 60 ns t

Driver Input to Output 20 30 60 ns t Driver Skew 5 ns Driver Rise or Fall Time 3 15 40 ns From 10% to 90%; R

SP490E

RECEIVER

= 54Ω, CL1 = CL2 = 100pF

DIFF

; R

PLH

see Figures 3 and 6

PHL

see Figures 3 and 5

= 54Ω, CL1 = CL2 = 100pF;

DIFF

; R

= 54Ω, CL1 = CL2 = 100pF;

DIFF

see Figures 3 and 5,

= | t

SKEW

CL1 = C

DPLH

= 100pF;

- t

DPHL

= 54Ω,

DIFF

see Figures 3 and 5

DC Characteristics

Differential Input Threshold -0.2 +0.2 Volts -7V ≤ V Input Hysteresis 70 mV VCM = 0V

≤ 12V

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

≤ 12V

Input Current (A, B); VIN = -7V -0.8 mA VIN = -7V Short-Circuit Current 85 mA 0V ≤ VO ≤ V

Page 3

SPECIFICATIONS (continued)

to T

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

MIN

MAX

PARAMETERS MIN. TYP. MAX. UNITS CONDITIONS SP490E RECEIVER AC Characteristics

Maximum Data Rate 10 Mbps Receiver Input to Output 20 45 100 ns t

Receiver Input to Output 20 45 100 ns t Diff. Receiver Skew It

I13 nsR

PLH-tPHL

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)

; R

PLH

CL1 = C

; R

PHL

CL1 = C

DIFF

Figures 3 & 7

= 54Ω,

DIFF

= 100pF;

= 54Ω,

DIFF

100pF;

= 54Ω; C

Figures 3 & 7

= C

= 100pF;

Figure 1. Driver DC Test Load Circuit

A B

DIFF

Test Point

1kC

Receiver

Output

Figure 2. Receiver Timing Test Load Circuit

A B

15pF

Output

Under

Test

500

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

Page 4

+3V

DRIVER

OUTPUT

DIFFERENTIAL

OUTPUT

VY – V

SKEW = | tDPLH - tDPHL

Figure 5. Driver Propagation Delays

f = 1MHz; tR < 10ns; tF < 10ns

1.5V 1.5V t

PLH

Z Y + –

1/2V

DPLH

PHL

DPHL

1/2V

+3V

1.5V 1.5V

0V 5V

A, B

Y, Z

A, B

Y, Z

2.3V

Figure 6. Driver Enable and Disable Times

0D2

Y – Z

–

0D2

PHL

f = 1MHz; tR < 10ns; tF < 10ns

Output normally LOW

Output normally HIGH

f = 1MHz; tR < 10ns; tF < 10ns

0V 0V

1.5V 1.5V

INPUT

OUTPUT

PLH

0.5V

0.5V t

SKEW = | tPHL - tPLH

Figure 7. Receiver Propagation Delays

Page 5

ABSOLUTE MAXIMUM RATINGS

VCC....................................................................................................+7V

Input Voltages

Output Voltages

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

Power Dissipation.....................................................................1000mW

Logic...................................................-0.5V to (VCC+0.5V)

Drivers................................................-0.5V to (VCC+0.5V)

Receivers..................................................................±14V

Logic...................................................-0.5V to (VCC+0.5V)

Drivers......................................................................±14V

Receivers...........................................-0.5V to (VCC+0.5V)

SPECIFICATIONS

to T

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

MIN

MAX

PARAMETERS MIN. TYP. MAX. UNITS CONDITIONS SP491E 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

= HIGH 250 mA -7V ≤ VO ≤ 10V

OUT

= LOW 250 mA -7V ≤ VO ≤ 10V

OUT

Volts Unloaded; R = ∞ ;

Volts With Load; R = 50Ω; (RS-422);

Volts

see Figure 1

With Load; R = 27Ω; (RS-485);

see Figure 1

see Figure 1 see Figure 1

SP491E DRIVER AC Characteristics

Maximum Data Rate 10 Mbps R Driver Input to Output 20 30 60 ns t

Driver Input to Output 20 30 60 ns t Driver Skew 5 10 ns Driver Rise or Fall Time 3 15 40 ns From 10% to 90%; R Driver Enable to Output HIGH 40 70 ns CL1 = C Driver Enable to Output LOW 40 70 ns CL1 = C Driver Disable Time from LOW 40 70 ns CL1 = C Driver Disable Time from HIGH

40 70 ns CL1 = C

= 54Ω, CL1 = CL2 = 100pF

DIFF

; R

PLH

see Figures 3 and 5

PHL

see Figures 3 and 5

= 54Ω, CL1 = CL2 = 100pF;

DIFF

; R

= 54Ω, CL1 = CL2 = 100pF;

DIFF

see Figures 3 and 5,

= | t

SKEW

CL1 = C

4 and 6; 4 and 6; 4 and 6; 4 and 6;

DPLH

= 100pF;

S2 closed

= 100pF;

S1 closed

= 15pF;

S1 closed

= 15pF;

S2 closed

- t

DPHL

see Figures see Figures

= 54Ω,

DIFF

see Figures 3 and 5

see Figures see Figures

Page 6

SPECIFICATIONS (continued)

to T

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

MIN

MAX

PARAMETERS MIN. TYP. MAX. UNITS CONDITIONS SP491E

DC Characteristics

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

SP491E AC Characteristics

Maximum Data Rate 10 Mbps REB = 0V, DE = 5V Receiver Input to Output 20 45 100 ns t

Receiver Input to Output 20 45 100 ns t Diff. Receiver Skew It Receiver Enable to Output LOW

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

POWER REQUIREMENTS

Supply Voltage +4.75 +5.25 Volts Supply Current 900 µA REB, D = 0V or VCC; DE = V

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)

RECEIVER

I13 nsR

PLH-tPHL

45 70 ns C 45 70 ns C 45 70 ns C 45 70 ns C

; R ; R

DIFF

= 15pF;

= 54Ω,

DIFF

= 100pF;

= 54Ω,

DIFF

= 54Ω; C

PLH

CL1 = C

PHL

CL1 = C

Figures 3 & 7

≤ 12V

Figures 3 & 7

100pF;

Figures 3 & 7

= C

= 100pF;

Figures 2 and 8; Figures 2 and 8; Figures 2 and 8; Figures 2 and 8;

S1 closed S2 closed S1 closed S2 closed

+3V

1.5V 1.5V

f = 1MHz; tR < 10ns; tF < 10ns

Figure 8. Receiver Enable and Disable Times

1.5V

Output normally LOW

Output normally HIGH

0.5V

0.5V t

Page 7

FEATURES

The SP490E and SP491E 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.

THEORY OF OPERATION

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.

Drivers

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.

Receivers

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 between 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 receiver.

ESD Tolerance

The SP490E/SP491E devices incorporate ruggedized ESD cells on all driver output and receiver input pins. The ESD structure is improved over our previous family for more rugged applications and environments sensitive to electro-static discharges and associated transients. The improved ESD tolerance is at least ±15kV without damage nor latch-up.

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.

SW1

SW1SW1

DC Power Source

Figure 9. ESD Test Circuit for Human Body Model

SW2

SW2SW2

Device Under Test

Page 8

Contact-Discharge Module

Contact-Discharge ModuleContact-Discharge Module

SW1

SW1SW1

DC Power Source

Figure 10. ESD Test Circuit for IEC1000-4-2

There are different methods of ESD testing applied:

a) MIL-STD-883, Method 3015.7 b) IEC1000-4-2 Air-Discharge c) IEC1000-4-2 Direct Contact

The Human Body Model has been the generally accepted ESD testing method for semiconductors. This method is also specified in MIL-STD-883, Method 3015.7 for ESD testing. The premise of this ESD test is to simulate the human body’s potential to store electro-static energy and discharge it to an integrated circuit. The simulation is performed by using a test model as shown in Figure 9. This method will test the IC’s capability to withstand an ESD transient during normal handling such as in manufacturing areas where the ICs tend to be handled frequently.

RS and RV add up to 330Ω for IEC1000-4-2.

andand RR

S S

SW2

SW2SW2

add up to 330add up to 330ΩΩ f for IEC1000-4-2.or IEC1000-4-2.

V V

equipment that are accessible to personnel during normal usage. The transceiver IC receives most of the ESD current when the ESD source is applied to the connector pins. The test circuit for IEC1000-4-2 is shown on Figure 10. There are two methods within IEC1000-4-2, the Air Discharge method and the Contact Discharge method.

With the Air Discharge Method, an ESD voltage is applied to the equipment under test (EUT) through air. This simulates an electrically charged

i ➙

30A

Device Under Test

The IEC-1000-4-2, formerly IEC801-2, is

15A

generally used for testing ESD on equipment and systems. For system manufacturers, they must guarantee a certain amount of ESD protection since the system itself is exposed to the outside environment and human presence. The premise with IEC1000-4-2 is that the system is required to withstand an amount of static electricity when ESD is applied to points and surfaces of the

t=0ns t=30ns

t ➙

Figure 11. ESD Test Waveform for IEC1000-4-2

Page 9

person ready to connect a cable onto the rear of the system only to find an unpleasant zap just before the person touches the back panel. The high energy potential on the person discharges through an arcing path to the rear panel of the system before he or she even touches the system. This energy, whether discharged directly or through air, is predominantly a function of the discharge current rather than the discharge voltage. Variables with an air discharge such as approach speed of the object carrying the ESD potential to the system and humidity will tend to change the discharge current. For example, the rise time of the discharge current varies with the approach speed.

The Contact Discharge Method applies the ESD current directly to the EUT. This method was devised to reduce the unpredictability of the ESD arc. The discharge current rise time is constant since the energy is directly transferred without the air-gap arc. In situations such as hand held systems, the ESD charge can be directly discharged to the equipment from a person already holding the equipment. The current is transferred on to the keypad or the serial port of the equipment directly and then travels through the PCB and finally to the IC.

The circuit models in Figures 9 and 10 represent the typical ESD testing circuits used for all three methods. The CS is initially charged with the DC power supply when the first switch (SW1) is on. Now that the capacitor is charged, the second switch (SW2) is on while SW1 switches off. The voltage stored in the capacitor is then applied through RS, the current limiting resistor, onto the device under test (DUT). In ESD tests, the SW2 switch is pulsed so that the device under test receives a duration of voltage.

For the Human Body Model, the current limiting resistor (RS) and the source capacitor (CS) are

1.5kΩ an 100pF, respectively. For IEC-1000-42, the current limiting resistor (RS) and the source capacitor (CS) are 330Ω an 150pF, respectively.

The higher CS value and lower RS value in the IEC1000-4-2 model are more stringent than the Human Body Model. The larger storage capacitor injects a higher voltage to the test point when SW2 is switched on. The lower current limiting resistor increases the current charge onto the test point.

SP490E/SP491E HUMAN BODY IEC1000-4-2 Family MODEL Air Discharge Direct Contact Level

Driver Outputs ±15kV ±15kV ±8kV 4 Receiver Inputs ±15kV ±15kV ±8kV 4

Table 1. Transceiver ESD Tolerance Levels

Page 10

D1 = 0.005" min.

(0.127 min.)

e = 0.100 BSC

(2.540 BSC)

ALTERNATE

END PINS

(BOTH ENDS)

PACKAGE: PLASTIC

DUAL–IN–LINE (NARROW)

A1 = 0.015" min.

(0.381min.)

A = 0.210" max.

(5.334 max).

eA = 0.300 BSC

(7.620 BSC)

DIMENSIONS (Inches)

Minimum/Maximum

(mm) A2

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°)

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)

0.735/0.775

(18.669/19.685)

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°)

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)

0.780/0.800

(19.812/20.320)

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°)

18–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)

0.880/0.920

(22.352/23.368)

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°)

20–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)

0.980/1.060

(24.892/26.924)

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°)

22–PIN8–PIN 14–PIN 16–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)

1.145/1.155

(29.083/29.337)

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°)

Page 11

DIMENSIONS (Inches)

Minimum/Maximum

(mm) A

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°)

PACKAGE: PLASTIC

h x 45°

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°)

16–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)

0.386/0.394

(9.802/10.000)

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°)

SMALL OUTLINE (SOIC) (NARROW)

Page 12

ORDERING INFORMATION

Model Temperature Range Package

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

SP490ECP........................................................ 0˚C to +70˚C...........................................................8-Pin DIP

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

SP490EEP ...................................................... -40˚C to +85˚C ......................................................... 8-Pin DIP

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

SP491ECP........................................................ 0˚C to +70˚C......................................................... 14-Pin DIP

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

SP491EEP ...................................................... -40˚C to +85˚C ....................................................... 14-Pin DIP

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

Corporation

SIGNAL PROCESSING EXCELLENCE

Sipex Corporation Headquarters and

Sales Office

22 Linnell Circle Billerica, MA 01821 TEL: (978) 667-8700 FAX: (978) 670-9001 e-mail: sales@sipex.com

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.

Datasheet SP491EEN, SP491EEP, SP490ECP, SP490EEN, SP490EEP Datasheet (Sipex Corporation)

Specifications and Main Features

Frequently Asked Questions

User Manual