SP431_技术文档

SP431

SIGNAL PROCESSING EXCELLENCE

High Speed, +3.3V Quad RS-422

Differential Line Driver

■ Compatible with the EIA standard for

RS-422 serial protocol

■ Quad Differential Line Drivers

■ Tri-state Output Control

■ At Least 60Mbps Transmission Rates

■ 6.0ns Typical Driver Propagation Delays

■ Less than 1ns Typical Output Skew

■ Single +3.3V Supply Operation

■ Common Driver Enable Control

■ Compatibility with the industry standard

26LV31

DESCRIPTION

The SP431 is a quad differential line driver that meets the specifications of the EIA standard

RS-422 serial protocol. The SP431 features Sipex's BiCMOS process allowing low power

operational characteristics of CMOS technology while meeting all of the demands of the

RS-422 serial protocol over 60Mbps under load. The RS-422 protocol allows up to 10

receivers to be connected to a multipoint bus transmission line. The SP431 features a driver

enable control common to all four drivers and a tri-state output. Since the cabling can be as

long as 4,000 feet, the RS-422 drivers of the SP431 are equipped with a wide common-mode

output voltage range to accomodate ground potential differences.

V

CC

INPUTS

DI

16

15

14

1

2

3

4

5

6

7

8

V

CC

1

DI

4

2

1

3

D0 A

1

DI

4

SP431

D0 B

1

D0 A

4

ENABLE

13 D0 B

4

12

ENABLE

D0 B

2

ENABLE

D0 A

2

11

10

9

D0 B

3

DI

2

D0 A

3

DO

A

DO

B

DO

A

DO

B

DO

A

DO

B

DO

A

DO B

4

3

2

1

GND

DI

3

GND

OUTPUTS

SP431DS/08

SP431 High Speed, +3.3V Quad RS-422 Differential Line Driver

1

ABSOLUTE MAXIMUM RATINGS

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

theseratingsoranyotherabovethoseindicatedintheoperationsections

of the specifications below is not implied. Exposure to absolute

maximum rating conditions for extended periods of time may affect

reliability and cause permanent damage to the device.

V_CC........................................................................................0.5V to 7.0V

V_IN(DC Input Voltage).............................................-1.5V to (V_CC+ 1.5V)

V_OUT(DC Output Voltage)......................................................-0.5V to 7V

I_IK, I_OK(Clamp Diode Current)........................................................±20mA

I_OUT(DC Output Current, per pin)................................................±150mA

I_CC(DC V_CCor GND Current, per pin)..........................................±150mA

T_STG(Storage Temperature Range)...............................-65°C to +150°C

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

Power Dissipation Per Package

16-pin PDIP (derate 14.3mW/^oC above +70^oC).........................1150mW

16-pin NSOIC (derate 13.6mW/^oC above +70^oC)......................1100mW

VCC

INPUTS

DI

4

2

1

3

ENABLE

DO B DO A DO B DO A DO B

DO A DO B DO A

4

3

2

1

GND

OUTPUTS

Figure 1. SP431 Block Diagram

SP431DS/08

SP431 High Speed, +3.3V Quad RS-422 Differential Line Driver

2

SPECIFICATIONS

Unless otherwise noted, the following specifications apply for V_CC= +3.0V to +3.6V with T_amb= 25°C and all MIN

and MAX limits apply across the recommended operating temperature range.

DC PARAMETERS

MIN. TYP. MAX. UNITS

CONDITIONS

Supply Voltage, V_CC

3.0

3.6

V_CC

V

DC Input or Output Voltage, V_INor V_OUT

Input Electrical Characteristics

Input Rise or Fall Times, t_ror t_f

HIGH Level Input Voltage, V_IH

LOW Level Input Voltage, V_IL

3

ns

V

2.0

0.8

0.5

V

Output Electrical Characteristics

HIGH Level Output Voltage, V_OH

LOW Level Output Voltage, V_OL

Differential Output Voltage, V_T

Difference in Differential Output, |V_T| - |V_T|

Common Mode Output Voltage, V_OS

Difference in Common Mode Output, |V_OS-V_OS

2.5

2.0

2.9

0.2

2.7

V

V_IN= V_IHor V_IL, I_OUT= -20mA

V_IN= V_IHor V_IL, I_OUT= 20mA

R_L= 100Ω, Note 1

0.4

3.0

0.4

R_L= 100Ω, Note 1

|

R_L= 100Ω, Note 1

Quiescent Supply Current

I_CC

100

µA

V_IN= V_CCor GND, Note 2

Tri-state Output Leakage Current, I_OZ

±2.0

V_OUT= V_CCor GND,

ENABLE = V_IL,

ENABLE = V_IH

Output Short Circuit Current, I_SC

-30

-150

mA

V_IN= V_CCor GND, Notes 1 and 3

Output Leakage Current Power Off

I_OFF

100

µA

V_CC= 0V, V_OUT= 6V, Note 1

-100

V_CC= 0V, V_OUT= -0.25V, Note 1

NOTE 1: Refer to EIA specifications for RS-422 serial protocol for exact test conditions.

NOTE 2: Measured per input. All other inputs at V_CCor GND.

NOTE 3: This is the current sourced when a high output is shorted to GND. Only one output at a time should be shorted.

SP431DS/08

SP431 High Speed, +3.3V Quad RS-422 Differential Line Driver

3

SPECIFICATIONS (continued)

Unless otherwise noted, the following specifications apply for V_CC= +3.0V to +3.6V, T_amb= 25°C, t_r< 6ns, t_f< 6ns,

and all MIN and MAX limits apply across the recommended operating temperature range.

PARAMETERS

MIN. TYP. MAX. UNITS

CONDITIONS

SWITCHING CHARACTERISTICS

Propagation Delays, t_PLHD, t_PHLD

Skew

5

0.5

3

ns

pF

Figure 3

Figure 3, Note 4

Figure 3

Differential Ouput Rise and Fall Times, t_TLH, t_PHL

Output Enable Time, t_PZH

Output Enable Time, t_PZL

Output Disable Time, t_PHZ

Output Disable Time, t_PLZ

Power dissipation Capacitance, C_PD

Input Capacitance, C_IN

13

8

Figure 5

8

Figure 5, Note 5

Note 6

6

50

6

NOTE 4: Skew is defined as the difference in propagation delays between complementary outputs at the 50% input.

NOTE 5: Output disable time is the delay from ENABLE or ENABLE being switched to the output transistors turning off.

The actual disable times are less than indicated due to the delay added by the RC time constant of the load.

2

NOTE 6: C_PDdetermines the no load dynamic power consumption, P_D= (C_PDV_CCf) + (I_CCV_CC), and the no load dynamic

current consumption, I_S= (C_PDV_CCf) + I_CC

.

SP431DS/08

SP431 High Speed, +3.3V Quad RS-422 Differential Line Driver

4

AC TEST CIRCUITS AND SWITCHING TIME WAVEFORMS

f=1 MHz

1.5V

tR < 10ns, tF < 10ns

3V

DRIVER

INPUT DI

1.5V

PHLD

X

GND

t

PLHD

t

CL

DRIVER D0_X

B

V

OH

OL

0V (Differential)

80%

0V

DI_X

D0_XA

D0_XB

DRIVER D0_X

A

V

Generator

D

RL

50Ω

Driver

Enabled

80%

CL

DIFFERENTIAL

OUTPUT

0V

V_DIFF= V_A- V_B

20%

tTLH

t

THL

Figure 2. AC Test Circuit

Figure 3. Propagation Delays

ENABLE

1.5V

3V

0V

1.5V

t_PZH

Test

ENABLE

D0_X

A

Point

t_PHZ

VCC

S1

VCC

Input = ENABLE or ENABLE

S1= V^CC

S2

S3

V_OH

110Ω

S2 = D0_XB

V_OH= 0.3V

1.3V

S3 = GND

and/or

GND

CL

D0_X

B

S1 = GND

S2 = D0_XA

S3 = GND

t_PLZ

t_PZL

ENABLE

V_CC

V_OL

Input = ENABLE or ENABLE

S1= GND

V

_OL+ 0.3V

1.3V

If ENABLE is the input, then ENABLE = HIGH

If ENABLE is the input, then ENABLE = LOW

S2 = D0_XB

S3 = V^CC

and/or

S1 = V^CC

S2 = D0_XA

S3 = VCC

Figure 4. Driver Single-Ended TRI-STATE Test Circuit

Figure 5. Driver Single-Ended TRI-STATE Waveforms

3.0V

INPUT

0.0V

90%

10%

90%

10%

OUTPUT

(DIFFERENTIAL)

t

TLH

t

THL

Input pulse: f = 1MHz, 50%

t

r

< 6ns

tf

Figure 6. Differential Rise and Fall Times

SP431DS/08

SP431 High Speed, +3.3V Quad RS-422 Differential Line Driver

5

DESCRIPTION

The SP431 is a low-power quad differential line

driver designed for digital data transmission

meeting the specifications of the EIA standard

RS-422 serial protocol. The SP431 features

Sipex's BiCMOS process allowing low power

operational characteristics of CMOS technol-

ogy while meeting all of the demands of the

RS-422 serial protocol up to 60Mbps under load

in harsh environments.

The RS-422 line driver outputs feature high

source and sink current capability. All drivers

are internally protected against short circuits on

theiroutputs. Thedriveroutputsareshort-circuit

limited to 150mA. The driver output skew times

are typically 0.5ns.

To minimize reflections, the multipoint bus

transmission line should be terminated at both

ends in its characteristic impedance, and stub

lengths off the main line should be kept as short

as possible.

The RS-422 standard is ideal for multi-drop

applications and for long-distance communica-

tion. The RS-422 protocol allows up to 10

drivers to be connected to a data bus, making it

anidealchoiceformulti-dropapplications. Since

the cabling can be as long as 4,000 feet, RS-422

drivers are equipped with a wide common mode

output range to accommodate ground potential

differences. BecausetheRS-422isadifferential

interface, data is virtually immune to noise in

the transmission line.

ENABLE

DATA

ENABLE

DATA

OUTPUT

*RT

The SP431 accepts TTL or CMOS input levels

andtranslatesthesetoRS-422outputlevels. The

SP431 features active HIGH and active LOW

driver enable controls common to all four driver

channels see Figure 8. A logic HIGH on the

ENABLE pin (pin 4) or a logic LOW on the

ENABLE pin (pin 12) will enable the differential

driver outputs. A logic LOW on the ENABLE

pin (pin 4) or a logic HIGH on the ENABLE pin

(pin 12) will tri-state the driver outputs.

*R

T

is optional although highly

recommended to reduce reflection.

Figure 7. Two-Wire Balanced System, RS-422

Non-

Inverting

Output

Inverting

Output

ENABLE

Input

LOW

HIGH

don't care

LOW

don't care

LOW

tri-state

LOW

tri-state

HIGH

LOW

don't care

HIGH

Figure 8. Truth Table, Enable / Disable Function

Common to All Four RS-422 Drivers

SP431DS/08

SP431 High Speed, +3.3V Quad RS-422 Differential Line Driver

6

DI

16

15

14

1

2

3

4

5

6

7

8

V

CC

1

D0 A

1

DI

4

SP431

D0 B

1

D0 A

4

ENABLE

13 D0 B

4

12

D0 B

2

ENABLE

D0 A

2

11

10

9

D0 B

3

DI

2

D0 A

3

GND

DI

3

PINOUT

PIN ASSIGNMENTS

Pin 1 — DI₁— Driver 1 TTL input.

Pin 10 — D0₃A — Non-inverted driver output.

Pin 11 — D0₃B — Inverted driver output.

Pin 2 — D0₁A — Non-inverted driver output.

Pin 3 — D0₁B — Inverted driver output.

Pin 12 — ENABLE — Driver output enable,

active LOW.

Pin 4 — ENABLE — Driver output enable,

activeHIGH.

Pin 13 — D0₄B — Inverted driver output.

Pin 14 — D0₄A — Non-inverted driver output.

Pin 15 — DI₄— Driver 4 TTL input.

Pin 5 — D0₂B — Inverted driver output.

Pin 6 — D0₂A — Non-inverted driver output.

Pin 7 — DI₂— Driver 2 TTL input.

Pin 8 — GND — Ground.

Pin 16 — V_CC— +3.0V to +3.6V power

supply.

Pin 9 — DI₃— Driver 3 TTL input.

SP431DS/08

SP431 High Speed, +3.3V Quad RS-422 Differential Line Driver

7

TYPICAL PERFORMANCE CHARACTERISTICS

TBD

Figure 9. Differential Propagation Delay Vs. Temperature

Figure 10. Differential Propagation Delay Vs. Temperature

TBD

Figure 11. Differential Skew Vs. Temperature

Figure 12. Differential Skew Vs. Power Supply Voltage

SP431DS/08

SP431 High Speed, +3.3V Quad RS-422 Differential Line Driver

8

TYPICAL PERFORMANCE CHARACTERISTICS (continued)

TBD

Figure 14. Differential Transition Time Vs.

Power Supply Voltage

Figure 13. Differential Transition Time Vs. Temperature

TBD

Figure 16. Complementary Skew Vs. Power Supply Voltage

Figure 15. Complementary Skew Vs. Temperature

SP431DS/08

SP431 High Speed, +3.3V Quad RS-422 Differential Line Driver

9

TYPICAL PERFORMANCE CHARACTERISTICS (continued)

TBD

Figure 18. Differential Output Voltage Vs. Output Current

Figure 17. Differential Output Voltage Vs. Output Current

TBD

Figure 20. Output High Voltage Vs. Output High Current

Figure 19. Output High Voltage Vs. Output High Current

SP431DS/08

SP431 High Speed, +3.3V Quad RS-422 Differential Line Driver

10

TYPICAL PERFORMANCE CHARACTERISTICS (continued)

TBD

Figure 22. Output Low Voltage Vs. Output Low Current

Figure 21. Output Low Voltage Vs. Output Low Current

TBD

Figure 24. Supply Current Vs. Power Supply Voltage

Figure 23. Supply Current Vs. Temperature

SP431DS/08

SP431 High Speed, +3.3V Quad RS-422 Differential Line Driver

11

TYPICAL PERFORMANCE CHARACTERISTICS (continued)

TBD

Figure 26. Loaded Supply Current Vs. Data Rate

Figure 25. No Load Supply Current Vs. Data Rate

TBD

Figure 28. Output Short Circuit Current Vs.

Power Supply Voltage

Figure 27. Output Short Circuit Current Vs. Temperature

SP431DS/08

SP431 High Speed, +3.3V Quad RS-422 Differential Line Driver

12

PACKAGE: PLASTIC

DUAL–IN–LINE

(NARROW)

E1

E

D1 = 0.005" min.

(0.127 min.)

A1 = 0.015" min.

(0.381min.)

D

A = 0.210" max.

(5.334 max).

C

A2

Ø

L

B1

B

e

= 0.300 BSC

(7.620 BSC)

e = 0.100 BSC

(2.540 BSC)

A

ALTERNATE

END PINS

(BOTH ENDS)

DIMENSIONS (Inches)

Minimum/Maximum

(mm)

16–PIN

0.115/0.195

(2.921/4.953)

A2

0.014/0.022

(0.356/0.559)

B

0.045/0.070

B1

C

(1.143/1.778)

0.008/0.014

(0.203/0.356)

0.780/0.800

(19.812/20.320)

D

0.300/0.325

(7.620/8.255)

E

0.240/0.280

E1

L

(6.096/7.112)

0.115/0.150

(2.921/3.810)

0°/ 15°

(0°/15°)

Ø

SP431DS/08

SP431 High Speed, +3.3V Quad RS-422 Differential Line Driver

13

PACKAGE: PLASTIC

SMALL OUTLINE (SOIC)

(NARROW)

E

H

h x 45°

D

A

Ø

A1

L

e

B

DIMENSIONS (Inches)

Minimum/Maximum

(mm)

16–PIN

A

A1

B

D

E

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)

e

0.050 BSC

(1.270 BSC)

H

h

0.228/0.244

(5.801/6.198)

0.010/0.020

(0.254/0.498)

L

0.016/0.050

(0.406/1.270)

Ø

0°/8°

(0°/8°)

SP431DS/08

SP431 High Speed, +3.3V Quad RS-422 Differential Line Driver

14

ORDERING INFORMATION

Model .................................................................................... Temperature Range .....................................................................................Package

SP431CP ..................................................................................... 0°C to +70°C ........................................................................... 16–pin Plastic DIP

SP431CN ..................................................................................... 0°C to +70°C .......................................................................... 16–pinNarrow SOIC

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

Co rp o ra tio n

SIGNAL PROCESSING EXCELLENCE

Sipex Corporation

European Sales Offices:

Far East:

Headquarters and

Sales Office

22 Linnell Circle

Billerica, MA 01821

TEL: (978) 667-8700

FAX: (978) 670-9001

e-mail: sales@sipex.com

ENGLAND:

Sipex Corporation

2 Linden House

Turk Street

Alton Hampshire GU34 IAN

England

TEL: 44-1420-549527

FAX: 44-1420-542700

e-mail: mikeb@sipex.co.uk

JAPAN:

Nippon Sipex Corporation

Yahagi No. 2 Building

3-5-3 Uchikanda, Chiyoda-ku

Tokyo 101

TEL: 81.3.3256.0577

FAX: 81.3.3256.0621

Sales Office

233 South Hillview Drive

Milpitas, CA 95035

TEL: (408) 934-7500

FAX: (408) 935-7600

GERMANY:

Sipex GmbH

Gautinger Strasse 10

82319 Starnberg

TEL: 49.81.51.89810

FAX: 49.81.51.29598

e-mail: sipex-starnberg@t-online.de

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.

SP431DS/08

SP431 High Speed, +3.3V Quad RS-422 Differential Line Driver

15


型号：	SP431
厂家：	SIPEX CORPORATION
描述：	High Speed, +3.3V Quad RS-422 Differential Line Driver 高速， + 3.3V四路RS- 422差分线路驱动器驱动器
文件：	总15页 (文件大小：364K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

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