Datasheet SP3488CP, SP3488CT, SP3488EP, SP3488ET, SP3489CP Datasheet (Sipex Corporation)

®

SP3488 and SP3489

+3.3V Low Power Quad

RS-485/RS-422 Line Receivers

■ RS-485 or RS-422 Quad Differential Line Receivers

■ Operates from a single +3.3V supply

■ Interoperable with +5.0V logic

■ Tri-state Output Control

■ -7V to +12V Common-Mode Input

Voltage Range

■ Common Driver Enable Control (SP3488)

■ Independent Driver Enable Controls for each pair of Drivers (SP3489)

■ Compatibility with LTC488 and SN75173 (SP3488)

■ Compatibility with LTC489 and SN75175 (SP3489)

DESCRIPTION…

The SP3488 and the SP3489 are +3.3V low power quad line receivers that meet the specifications of the RS-485 and RS-422 serial protocols. These devices are pin-to-pin compatible with Sipex's SP488 and SP489 devices as well as popular industry standards. The SP3488 and SP3489 feature Sipex's BiCMOS process allowing low power operation without sacrificing performance. The SP3488 and SP3489 meet the electrical specifications of RS-485 and RS-422 serial protocols up to 10Mbps under load. The SP3488 features a common receiver enable control. The SP3489 provides independent receiver enable controls for each pair of receivers. Both devices feature tri-state outputs and a -7V to +12V common-mode input range. The receivers have a fail-safe feature which forces a logic "1" output when receiver inputs are left floating.

RI1B

RI

RO

RI2A

RI

GND

RI1B

EN1/EN

RI

RO

RI2A

RI

GND

1

A

2

1

B

2

1

3

1

4

2

5

2

6

7

8

16

1

A

2

1

EN

B

2

1

3

1

4

5

2

6

7

8

SP3488

4

3

V

CC

15

RI4B

14

RI

A

4

13

RO

4

12

EN

11

RO

3

10

RI3A

9

RI

B

3

SP3489

4

3

16

V

CC

15

RI4B

14

A

RI

4

13

RO

4

12

EN3/EN

4

11

RO

3

10

RI3A

9

RI

B

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 = +3.3V±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 kΩ -7V ≤ VCM ≤ 12V Differential Input Threshold -0.2 +0.2 Volts -7V ≤ VCM ≤ 12V Input Current (A, B) VCC = 0V or 3.3V; 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 V

VCC-0.4 V IO = -1.5mA; VID = +0.2V

0.4 V IO = +2.5mA; VID = -0.2V

= maximum; 0.4V ≤ VO ≤ V

CC

POWER REQUIREMENTS

Supply Current 2.2 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

15pF

A

DRIVER RCVR

DI

B

54Ω

15pF

1/4 SP3486 1/4 SP3488

EN

ROn C

L

RCVR

S

1

1kΩ

V

C

L

1kΩ

S

2

CC

Figure 1. Timing Test Circuit

SP3488 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 SP3488 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

RI

RO

RI2A

RI

GND

1

A

2

1

EN

2

B

2

1

3

4

5

2

6

7

8

SP3488

16

V

CC

RI4B

15

RI

14

4

3

A

4

13

RO

4

12

EN

11

RO

3

10

RI3A

9

RI

B

3

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 SP3488 Truth Table (1).

RI1B

RI

RO

EN1/EN

RO

RI2A

RI

GND

1

A

2

1

2

B

2

1

3

4

5

2

6

7

8

SP3489

16

V

CC

15

RI4B

14

RI

4

3

A

4

13

RO

4

12

EN3/EN

4

11

RO

3

10

RI3A

9

RI

B

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 — VCC — Positive Supply +3.00V < V < +3.60V

CC

SP3489 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 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 SP3489 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. SP3488 Truth Table

XLH

XLX

XLL

Pin 12 — EN3/EN4 — Receiver 3 and 4 Output Enable. Please refer to SP3489 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 — VCC — Positive Supply +3.00V < V

< +3.60V

CC

FEATURES...

The SP3488 and the SP3489 are +3.3V low power quad line receivers that meet the specifications of the RS-485 and RS-422 serial protocols. These devices are pin-to-pin compatible with Sipex's SP488 and SP489 devices as well as popular industry standards. The SP3488 and SP3489 devices feature Sipex's BiCMOS process allowing low power operation without sacrificing performance.

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

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. SP3489 Truth Table

/EN2 or EN3/EN

1

RO

4

cabling can be as long as 4,000 feet, RS-485 transceivers are equipped with a wide (-7V to +12V) common mode range to accomodate ground potential differences. Because the RS-485 protocol is a differential interface, data is virtually immune to noise in the transmission line.

Receiver...

The SP3488 and the SP3489 receivers have differential inputs with an input sensitivity as low as +100mV. 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 SP3488 features active HIGH and active LOW common receiver enable controls. Refer to SP3488 Truth Table in Table 1. The SP3489 provides independent, active high receiver enable controls for each pair of receivers. Refer to SP3489 Truth Table in Table 2. Both devices feature tri-state outputs and a -7V to +12V common-mode input range permitting a +7V ground difference between devices on the communication bus. The SP3488 and the SP3489 are equipped with a fail-safe feature which forces a logic HIGH at the receiver output when the input is left floating. The SP3488 and SP3489 receivers meet the electrical specifications of RS-485 and RS-422 serial protocol data rates up to 10Mbps under load.

AC PARAMETERS

VCC = +3.3V±5%; typicals at 25°C; T

PARAMETER MIN. TYP. MAX. UNIT CONDITIONS PROPAGATION DELAY

Receiver Input to Output CL = 15pF;

Low to HIGH (tPLH) 75 115 ns

High to LOW (tPHL) 80 115 ns Differential Receiver Skew (t Receiver Rise Time (tR) 10% to 90%

SP3488 7 15 ns

SP3489 7 15 ns Receiver Fall Time (tF) 90% to 10%

SP3488 6 15 ns

SP3489 6 15 ns

RECEIVER ENABLE

To Output HIGH 46 100 ns CL = 15pF; To Output LOW 46 100 ns CL = 15pF;

RECEIVER DISABLE

From Output LOW 46 100 ns CL = 15pF; From Output HIGH 46 100 ns CL = 15pF;

= 25°C unless otherwise noted.

AMB

)4 ns

SKD

Figure 1, 3

Figures 2 and 4

(S2 closed)

Figures 2 and 4

(S1 closed)

Figures 2 and 4

(S1 closed)

Figures 2 and 4

(S2 closed)

5

+V

RO

–V

OD OD

t

PHL

V

OH

V

OL

Input A–B

Figure 3. Receiver Propagation Delays

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

0V 0V

t

PLH

1.5V

3V

EN

0V

t

ZL

5V

RO

V

OL

t

ZH

V

OH

RO

0V

Figure 4. Receiver Enable/Disable Timing

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

6

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°)

7

D

Be

DIMENSIONS (Inches)

Minimum/Maximum

(mm)

A

A1

B

D

E

e

H

L

Ø

EH

A

A1

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°)

PACKAGE: PLASTIC

SMALL OUTLINE (SOIC) (WIDE)

Ø

L

8

ORDERING INFORMATION

Quad RS485 Receivers:

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

SP3488CP ...........................Common; active Low and Active High ...................... 0°C to +70°C ........................................... 16–pin Plastic DIP

SP3488CT............................ Common; active Low and Active High ...................... 0°C to +70°C .................................................... 16–pin SOIC

SP3488EP............................ Common; active Low and Active High ...................... –40°C to +85 °C ....................................... 16–pin Plastic DIP

SP3488ET ............................Common; active Low and Active High ...................... –40°C to +85°C ................................................ 16–pin SOIC

SP3489CP ...........................One per driver pair; active High ................................. 0°C to +70°C ........................................... 16–pin Plastic DIP

SP3489CT............................ One per driver pair; active High................................. 0°C to +70°C .................................................... 16–pin SOIC

SP3489EP............................ One per driver pair; active High................................. –40°C to +85°C ....................................... 16–pin Plastic DIP

SP3489ET ............................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.

9

Datasheet SP3488CP, SP3488CT, SP3488EP, SP3488ET, SP3489CP Datasheet (Sipex Corporation)

Specifications and Main Features

Frequently Asked Questions

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