Datasheet SP489ACP, SP489ACT, SP489AEP, SP489AET, SP488ACP Datasheet (Sipex Corporation)

®

SP488A and SP489A

High Speed Quad

RS-485/RS-422 Line Receivers

■ High Speed Versions of Sipex's SP488 & SP489

■ 30Mbps Transmission Rates

■ Quad Differential Line Receivers

■ RS-485 or RS-422 Applications

■ Tri–state Output Control

■ 30ns Typical Receiver Propagation

Delays

■ –7V to +12V Common Mode Input Range

■ 1mA Supply Current

■ Single +5V Supply Operation

■ Pin Compatible with SN75173,

SN75175, LTC488 and LTC489

DESCRIPTION…

The SP488A and SP489A are high speed quad differential line receivers capable of meeting the RS-485 and RS-422 protocols while running at five times the normal transmission rates. The SP488A and SP489A are enhanced versions of Sipex's SP488 and SP489 quad RS-485/RS-422 line receivers. The SP488A features a common receiver enable control; the SP489A provides independent receiver enable controls for each pair of receivers. Both feature tri–state outputs and wide common–mode input range. The receivers have a fail–safe feature which forces a logic “1” output when receiver inputs are left floating. Both are available in 16–pin plastic DIP and SOIC packages.

16

RI1B

RI

RO

RI2A

RI

GND

RI1B

RI

RO

RI2A

RI

GND

1

2

A

1

3

1

4

2

5

2

6

7

B

2

8

1

2

SP489A

4

3

16

1

2

A

1

EN

2

B

2

1

3

4

5

2

6

7

8

SP488A

4

3

V

CC

15

RI4B

14

RI

A

4

RO

EN

RO

RI3A

RI

EN1/EN

4

3

B

3

13

12

11

10

9

V

CC

15

RI4B

14

RI

A

4

13

RO

4

12

EN3/EN

4

11

RO

3

10

RI3A

9

RI

B

3

PRELIMINARY INFORMATION

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 30 Mbps

RECEIVER OUTPUTS

Output Voltage

V

OH

V

OL

High Impedance Output Current +1 µA EN = O, EN = V

3.5 V IO = –4mA; VID = +0.2V

0.4 V IO = +4mA; VID = –0.2V

, EN1/EN2 = O,

/EN4 = O, 0.4V ≤ VO ≤ 2.4V

EN

3

CC

POWER REQUIREMENTS

Supply Voltage 4.75 5.25 Volts Supply Current TBD 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

PRELIMINARY INFORMATION

2

AC PARAMETERS

VCC = 5V±5%; typicals at 25°C; 0°C ≤ TA ≤ +70°C unless otherwise noted.

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 Rise Time (tR) 10% to 90%

SP488A TBD ns

SP489A TBD ns Receiver Fall Time (tF) 90% to 10%

SP488A TBD ns

SP489A TBD ns

RECEIVER ENABLE

To Output HIGH TBD ns CL = 15pF; To Output LOW TBD ns CL = 15pF;

RECEIVER DISABLE

From Output LOW TBD ns CL = 15pF; From Output HIGH TBD ns CL = 15pF;

) TBD ns

PLH

) TBD ns

PHL

) TBD ns

SKD

(S2 closed) (S1 closed)

(S1 closed) (S2 closed)

Figure 1, 3

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 1. Receiver Propagation Delays

Figure 2. 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

PRELIMINARY INFORMATION

3

PINOUT

RI1B

RI

RO

RI2A

RI

GND

1

A

2

1

EN

2

B

2

1

3

4

5

2

6

7

8

SP488A

16

V

CC

RI4B

15

RI

A

14

4

3

4

RO

13

4

12

EN

11

RO

3

10

RI3A

9

RI

B

3

SP488A 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.

RI1B

RI

RO

EN1/EN

RO

RI2A

RI

GND

1

2

A

1

2

B

2

1

3

4

5

2

6

7

8

SP489A

16

V

CC

15

RI4B

14

A

4

3

RI

4

13

RO

4

12

EN3/EN

11

RO

3

10

RI3A

9

B

RI

3

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.

4

Pin 4 — EN — Receiver Output Enable. Please refer to SP488A 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.

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

Pin 12 — EN — Receiver Output Enable. Please refer to SP488A Truth Table (1).

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.

PRELIMINARY INFORMATION

4

A

DRIVER RCVR

DI

B

1/4 SP486 1/4 SP488

54Ω

50pF

EN

ROn C

L

RCVR

S

1

1kΩ

V

C

L

1kΩ

S

2

CC

Figure 3. Timing Test Circuit

SP489A PINOUT

Pin 1 — RI1B — Receiver 1 input B. Pin 2 — RI1A — Receiver 1 input A. Pin 3 — RO1 — Receiver 1 Output — If Re-

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

> 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 SP489A 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.

Figure 4. Enable/Disable Timing Test Circuit

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 — EN3/EN4 — Receiver 3 and 4 Output Enable. Please refer to SP489A 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 6 — RI2A — Receiver 2 input A. Pin 7 — RI2B — Receiver 2 input B. Pin 8 — GND — Digital Ground.

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

5.25V.

PRELIMINARY INFORMATION

5

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. SP488A Truth Table

XLH

XLX

XLL

FEATURES…

The SP488A and SP489A are low–power quad differential line receivers meeting RS-485 and RS-422 serial protocol. The SP488A and SP489A feature Sipex's BiCMOS process allowing low power operational characteristics of CMOS technology while meeting all of the demands of the RS-485 and RS-422 serial protocols over 10Mbps under load in harsh environments. In fact, the SP488A and SP489A can transmit signals up to 30Mbps.

The RS-485 standard is ideal for multi-drop applications and for long-distance communication. 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.

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. SP489A Truth Table

/EN2 or EN3/EN

1

RO

4

Normally an RS-485 driver will produce no less than 1.5V before cable attenuation. After cable loss, the signal may degrade and have an amplitude of less than 1.0V. The receiver input sensitivity of the SP488A and SP489A allows the devices to receive signals as low as 200mV.

The SP488A features active high and active low common receiver enable controls; the SP489A 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 SP488A/489A are equipped with a fail–safe feature which forces a logic high at the receiver output when the input is left floating. Both are available in 16-pin plastic DIP and SOIC packages.

PRELIMINARY INFORMATION

6

ORDERING INFORMATION

Quad RS485 Receivers:

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

SP488ACP ............... Common; active Low and Active High ..0°C to +70°C ....................16–pin Plastic DIP

SP488ACT................Common; active Low and Active High .. 0°C to +70°C.............................16–pin SOIC

SP488AEP................Common; active Low and Active High .. –40°C to +85°C................16–pin Plastic DIP

SP488AET................ Common; active Low and Active High ..–40°C to +85°C ......................... 16–pin SOIC

SP489ACP ............... One per driver pair; active High ............ 0°C to +70°C ....................16–pin Plastic DIP

SP489ACT................One per driver pair; active High ............0°C to +70°C ............................. 16–pin SOIC

SP489AEP................One per driver pair; active High ............–40°C to +85°C................16–pin Plastic DIP

SP489AET................ 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.

PRELIMINARY INFORMATION

7

Datasheet SP489ACP, SP489ACT, SP489AEP, SP489AET, SP488ACP Datasheet (Sipex Corporation)

Specifications and Main Features

Frequently Asked Questions

User Manual