Datasheet SP488ECT, SP488EEP, SP488EET, SP488ECP, SP489ECP Datasheet (Sipex Corporation)

®

SP488E and SP489E

Enhanced Quad RS-485/RS-422 Line Receivers

■ RS-485 or RS-422 Applications

■ Quad Differential Line Receivers

■ Receiver Output Disable

■ –7V to +12V Common Mode Input Range

■ 1mA Supply Current

■ Single +5V Supply Operation

■ Superior Drop-in Replacement for

SN75173, SN75175, LTC488 and LTC489

■ Improved ESD Specifications: +15kV Human Body Model +15kV IEC1000-4-2 Air Discharge +8kV IEC1000-4-2 Contact Discharge

DESCRIPTION…

The SP488E and SP489E are low-power quad differential line receivers that meet the specifications of RS-485 and RS-422 serial protocols with enhanced ESD performance. The ESD tolerance has been improved on these devices to over +15kV for both Human Body Model and IEC1000-4-2 Air Discharge Method. These devices are superior drop-in replacements to Sipex's SP488 and SP489 devices as well as popular industry standards. As with the original versions, the SP488E features a common receiver enable control and the SP489E provides independent receiver enable controls for each pair of receivers. Both feature wide common-mode input ranges. The receivers have a fail-safe features which forces a logic "1" output when receiver inputs are left floating. Both are available in 16-pin plastic DIP and SOIC packages.

RI1B

RI1A

RO

RI2A

RI2B

GND

1

2

1

3

1

4

2

5

2

6

7

8

SP489E

4

3

RI1B

1

RI1A

2

1

RO

3

1

EN

4

RO

5

2

RI2A

RI2B

GND

2

6

7

8

SP488E

4

3

V

16

CC

RI4B

15

RI4A

14

EN1/EN

RO

13

4

EN

12

RO

11

3

RI3A

10

RI3B

9

V

16

CC

RI4B

15

RI4A

14

RO

13

4

EN3/EN

12

11

10

9

RO

RI3A

RI3B

4

3

1

ABSOLUTE MAXIMUM RATINGS

These are stress ratings only and functional operation of the device at these 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

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

Receiver ..................................................... +14V

Receiver Output Voltage........–0.5V to (VCC +0.5V)

Input Currents

Logic........................................................ +25mA

Storage Temperature ................. –65°C to +150°C

Power Dissipation

Plastic DIP .............................................. 375mW

(derate 7mW/°C above +70°C)

Small Outline .......................................... 375mW

(derate 7mW/°C above +70°C)

Lead Temperature (soldering, 10 sec) .........300°C

SPECIFICATIONS

VCC = 5V±5%; typicals at 25°C; T

PARAMETER MIN. TYP. MAX. UNIT CONDITIONS DC CHARACTERISTICS

Digital Inputs EN, EN, EN1/EN2, EN3/EN Voltage

V

IL

V

IH

Input Current +2 µA 0V ≤ VIN ≤ V

≤ TA ≤ T

MIN

unless otherwise noted.

MAX

0.8 Volts

2.0 Volts

CC

4

RECEIVER INPUTS

Input Resistance 12 kOhm –7V ≤ VCM ≤ 12V Differential Input Threshold –0.2 +0.2 Volts –7V ≤ VCM ≤ 12V Input Current (A, B) VCC = 0V or 5.25V; I

+1.0 mA VIN = +12V

IN2

–0.8 mA VIN = –7V

Maximum Data Rate 10 Mbps

RECEIVER OUTPUTS

Output Voltage

V

OH

V

OL

High Impedance Output Current +1 µA 0.4V ≤ V

3.5 V IO = –4mA; VID = +0.2V

0.4 V IO = +4mA; VID = –0.2V

≤ 2.4V,

O

EN = O, EN = 1,

/ EN2 = EN3 / EN4 = O

EN

1

POWER REQUIREMENTS

Supply Voltage 4.75 5.00 5.25 Volts Supply Current 1 5 mA No load

ENVIRONMENTAL AND MECHANICAL

Operating Temperature

–C 0 +70 °C

–E –40 +85 °C Storage Temperature –65 +150 °C Package

–_P 16–pin Plastic DIP

–_T 16–pin SOIC

2

100pF

A

DRIVER RCVR

DI

B

54Ω

100pF

1/4 SP486E 1/4 SP488E

EN

ROn C

L

RCVR

S

1

1kΩ

V

C

L

1kΩ

S

2

CC

Figure 1. Timing Test Circuit

SP488 PINOUT

Pin 1 — RI1B — Receiver 1 input B. Pin 2 — RI1A

Receiver 1 input A.

—

Pin 3 — RO1 — Receiver 1 Output — If Receiver 1 output is enabled, if RI1A > RI1B by 200mV, Receiver output is high. If Receiver 1 output is enabled, and if RI1A < RI1B by 200mV, Receiver 1 output is low.

Pin 4 — EN — Receiver Output Enable. Please refer to SP488E Truth Table (1).

Pin 5 — RO2 — Receiver 2 Output — If Receiver 2 output is enabled, if RI2A > RI2B by 200mV, Receiver 2 output is high. If Receiver 2 output is enabled, and if RI2A < RI2B by 200mV, Receiver 2 output is low.

PINOUT

RI1B

RI1A

RO

RI2A

RI2B

1

2

1

3

1

EN

4

5

2

6

7

SP488E

4

3

V

16

CC

RI4B

15

RI4A

14

RO

13

4

EN

12

RO

11

3

RI3A

10

Figure 2. Enable/Disable Timing Test Circuit

Pin 6 — RI2A — Receiver 2 input A. Pin 7 — RI2B — Receiver 2 input B. Pin 8 — GND — Digital Ground. Pin 9 — RI3B — Receiver 3 input B. Pin 10 — RI3A — Receiver 3 input A. Pin 11 — RO3 — Receiver 3 Output — If

Receiver 3 output is enabled, if RI3A > RI3B by 200mV, Receiver 3 output is high. If Receiver 3 output is enabled, and if RI3A < RI3B by 200mV, Receiver 3 output is low.

Pin 12 — EN — Receiver Output Enable. Please refer to SP488E Truth Table (1).

RI1B

RI1A

RO

EN1/EN

RO

RI2A

RI2B

1

2

1

3

1

4

2

5

2

6

7

SP489E

4

3

V

16

CC

RI4B

15

RI4A

14

RO

13

4

EN3/EN

12

11

10

RO

RI3A

4

3

GND

8

RI3B

9

GND

8

RI3B

9

3

Pin 13 — RO4 — Receiver 4 Output — If Receiver 4 output is enabled, if RI4A > RI4B by 200mV, Receiver 4 output is high. If Receiver 4 output is enabled, and if RI4A < RI4B by 200mV, Receiver 4 output is low.

Pin 14 — RI4A — Receiver 4 input A. Pin 15 — RI4B — Receiver 4 input B.

Pin 9 — RI3B — Receiver 3 input B. Pin 10 — RI3A — Receiver 3 input A. Pin 11 — RO3 — Receiver 3 Output — If

Receiver 3 output is enabled, if RI3A > RI3B by 200mV, Receiver 3 output is high. If Receiver 3 output is enabled, and if RI3A < RI3B by 200mV, Receiver 3 output is low.

Pin 16 — Supply Voltage VCC — 4.75V ≤ VCC ≤

5.25V.

SP489E PINOUT

Pin 1 — RI1B — Receiver 1 input B. Pin 2 — RI1A — Receiver 1 input A. Pin 3 — RO1 —

Receiver 1 output is enabled, if RI 200mV, Receiver output is high. If Receiver 1

Receiver 1 Output — If

> RI1B by

1A

output is enabled, and if RI1A < RI1B by 200mV, Receiver 1 output is low.

Pin 4 — EN1/EN2 — Receiver 1 and 2 Output Enable. Please refer to SP489E Truth Table (2).

Pin 5 — RO2 — Receiver 2 Output — If Receiver 2 output is enabled, if RI2A > RI2B by 200mV, Receiver 2 output is high. If Receiver 2 output is enabled, and if RI2A < RI2B by 200mV, Receiver 2 output is low.

Pin 6 — RI2A — Receiver 2 input A. Pin 7 — RI2B — Receiver 2 input B. Pin 8 — GND — Digital Ground.

DIFFERENTIAL ENABLES OUTPUT

A – B EN EN RO

V

≥ 0.2V H X H

ID

–0.2V < VID < +0.2V H X X

V

≤ 0.2V H X L

ID

X L H Hi–Z

Table 1. SP488E Truth Table

XLH

XLX

XLL

Pin 12 — EN3/EN4 — Receiver 3 and 4 Output Enable. Please refer to SP489E Truth Table (2).

Pin 13 — RO4 — Receiver 4 Output — If Receiver 4 output is enabled, if RI4A > RI4B by 200mV, Receiver 4 output is high. If Receiver 4 output is enabled, and if RI4A < RI4B by 200mV, Receiver 4 output is low.

Pin 14 — RI4A — Receiver 4 input A. Pin 15 — RI4B — Receiver 4 input B. Pin 16 — Supply Voltage VCC — 4.75V ≤ VCC ≤

5.25V.

FEATURES…

The SP488E and SP489E are low–power quad differential line receivers meeting RS-485 and RS-422 standards. The SP488E features active high and active low common receiver enable controls; the SP489E provides independent, active high receiver enable controls for each pair of receivers. Both feature tri–state outputs and a -7V to +12V common–mode input range permitting a +7V ground difference between devices on the communications bus. The SP488E/489E are equipped with a fail–safe feature which forces a logic high at the receiver output when the input is left floating. Data rates up to 10Mbps are supported. Both are available in 16-pin plastic DIP and SOIC packages.

DIFFERENTIAL ENABLES OUTPUT

A – B EN

VID ≥ 0.2V H H

–0.2V < VID < +0.2V H X

VID ≤ 0.2V H L

X L Hi–Z

Table 2. SP489E Truth Table

/EN2 or EN3/EN

1

RO

4

AC PARAMETERS

VCC = 5V±5%; typicals at 25°C; T

PARAMETER MIN. TYP. MAX. UNIT CONDITIONS PROPAGATION DELAY

Receiver Input to Output CL = 15pF;

Low to HIGH (t High to LOW (t

Differential Receiver Skew (t

RECEIVER ENABLE

To Output HIGH 30 60 ns CL = 15pF; To Output LOW 35 60 ns CL = 15pF;

RECEIVER DISABLE

From Output LOW 35 60 ns CL = 15pF; From Output HIGH 30 60 ns CL = 15pF;

= 25°C unless otherwise noted.

AMB

)4560ns

PLH

)4560ns

PHL

) 5 ns t

SKD

= t

SKD

PHL

(S2 closed) (S1 closed)

(S1 closed) (S2 closed)

- t

Figure 1, 3

PLH

Figures 2 and 4

Figures 2 and 4 Figures 2 and 4

+V

RO

EN

RO

–V

OD OD

t

PHL

V

OH

V

OL

3V 0V

t

ZL

5V

V

OL

t

ZH

V

OH

0V

Input A–B

Figure 3. Receiver Propagation Delays

Figure 4. Receiver Enable/Disable Timing

F = 1MHZ: tr < 10ns: tf < 10ns

0V 0V

t

PLH

1.5V

F = 1MHZ: t

< 10ns: tf < 10ns

r

1.5V 1.5V t

LZ

1.5V Output normally low

t

HZ

Output normally high

1.5V

0.5V

5

R

RR

C

CC

RR

S

SS

SW1

SW1SW1

DC Power Source

Figure 5. ESD Test Circuit for Human Body Model

R

RR

C

CC

SW1

SW1SW1

DC Power Source

SW2

SW2SW2

C

CC

S

SS

Contact-Discharge Module

Contact-Discharge ModuleContact-Discharge Module

R

RR

S

C

CC

S

SS

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

RR

andand RR

S S

R

RR

V

SS

VV

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

V V

SW2

SW2SW2

Device Under Test

Figure 6. ESD Test Circuit for IEC1000-4-2

ESD TOLERANCE

The SP488E and SP489E 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 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 5. This method will test the IC’s 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

capability to withstand an ESD transient during

normal handling such as in manufacturing areas

where the ICs tend to be handled frequently.

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

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

6

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 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 6. There are two methods within IEC1000-4-2, the Air Discharge method and the Contact Discharge method.

i ➙

30A

15A

0A

t=0ns t=30ns

t ➙

Figure 7. ESD Test Waveform for IEC1000-4-2

With the Air Discharge Method, an ESD voltage is applied to the equipment under test (EUT) through air. This simulates an electrically charged 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 model in Figures 5 and 6 represent the typical ESD testing circuit 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

1.5kW an 100pF, respectively. For IEC-1000-4-2, the current limiting resistor (RS) and the source capacitor (CS) are 330W 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.

DEVICE PIN HUMAN BODY IEC1000-4-2 TESTED MODEL Air Discharge Direct Contact Level

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

Table 3. Transceiver ESD Tolerance Levels

+15kV +15kV +8kV 4

7

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

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)

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°)

8

PACKAGE: PLASTIC

SMALL OUTLINE (SOIC) (WIDE)

EH

D

A

Ø

Be

A1

DIMENSIONS (Inches)

Minimum/Maximum

(mm) A

A1

B

D

E

e

H

L

Ø

16–PIN

0.093/0.104

(2.352/2.649)

0.004/0.012

(0.102/0.300)

0.013/0.020

(0.330/0.508)

0.398/0.413

(10.10/10.49)

0.291/0.299

(7.402/7.600)

0.050 BSC

(1.270 BSC)

0.394/0.419

(10.00/10.64)

0.016/0.050

(0.406/1.270)

0°/8°

(0°/8°)

L

9

ORDERING INFORMATION

Quad RS485 Receivers:

Model ........................ Enable/Disable ......................................Temperature Range........................ Package

SP488ECP ............... Common; active Low and Active High .. 0°C to +70°C ....................16–pin Plastic DIP

SP488ECT................Common; active Low and Active High ..0°C to +70°C .............................16–pin SOIC

SP488EEP................Common; active Low and Active High ..–40°C to +85°C................16–pin Plastic DIP

SP488EET................ Common; active Low and Active High .. –40°C to +85°C ......................... 16–pin SOIC

SP489ECP ............... One per driver pair; active High ............ 0°C to +70°C....................16–pin Plastic DIP

SP489ECT................One per driver pair; active High ............0°C to +70°C .............................16–pin SOIC

SP489EEP................One per driver pair; active High ............–40°C to +85°C................16–pin Plastic DIP

SP489EET................ One per driver pair; active High ............ –40°C to +85°C ......................... 16–pin SOIC

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.

10

Datasheet SP488ECT, SP488EEP, SP488EET, SP488ECP, SP489ECP Datasheet (Sipex Corporation)

Specifications and Main Features

Frequently Asked Questions

User Manual