SP487CT-L [EXAR]

Line Driver, 4 Func, 4 Driver, PDSO16, LEAD FREE, SOIC-16;


型号：	SP487CT-L
厂家：	EXAR CORPORATION
描述：	Line Driver, 4 Func, 4 Driver, PDSO16, LEAD FREE, SOIC-16 驱动光电二极管接口集成电路驱动器
文件：	总9页 (文件大小：370K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

SP486/SP487

Quad RS-485/RS-422 Line Drivers

• RS-485 or RS-422 Applications

• Quad Differential Line Drivers

• Tri-state Output Control

• 40ns Typical Driver Propagation Delays

• 5ns Skew

• -7V to +ꢀ2V Common Mode Output Range

• ꢀ00µA Supply Current

• Single +5V Supply Operation

• Pin Compatible with SN75ꢀ72, SN75ꢀ74, LTC486 and LTC487

DESCRIPTION

The SP486 and SP487 are low-power quad differential line drivers meeting RS-485 and RS-

422 standards. The SP486 features a common driver enable control; the SP487 provides

independent driver enable controls for each pair of drivers. Both feature tri-state outputs

and a wide common-mode output range. SP486 and SP487 are available in a ꢀ6-pin SOIC

package.

Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 5ꢀ0-668-70ꢀ7 • www.exar.com

SP486_487_ꢀ00_06ꢀ6ꢀꢀ

ꢀ

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.

V_CC........................................................................+7V

Input Voltages

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

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

Driver Output Voltage.......................................+/-ꢀ4V

Input Currents

Logic..............................................+/-25mA

Driver.............................................+/-25mA

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

Power Dissipation

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

(derate 7mW/ºC above +70ºC)

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

(derate 7mW/ºC above +70ºC)

ELECTRICAL CHARACTERISTICS

V_CC= +5.0V +/-5%; typicals at 25°C; T_MIN≤ T_AMB≤T_MAXunless otherwise noted.

PARAMETERS

DC CHARACTERISTICS

DIGITAL INPUTS

Voltage V_IL

MIN.

TYP.

MAX.

UNITS CONDITIONS

DI, EN, EN, EN_ꢀ/EN₂, EN₃/EN₄

0.8

+/-2

Volts

Voltage V_IH

2.0

Input Current

µA

V_IN= 0V to V_CC

DRIVER OUTPUTS

Differential Voltage

Volts

I_O= 0; unloaded

R_L= 50Ω (RS-422); Figure 1

R_L= 27Ω (RS-485); Figure 1

R_L= 27Ω or 50Ω; Figure 1

ꢀ.5

Change in Output Magnitude

for Complementary Output

state

0.2

Common Mode Output Voltage

2.3

Volts

R_L= 27Ω or 50Ω; Figure 1

Change in Common Mode

Output Magnitude for

0.2

Complementary Output state

Driver Short Circuit Current V_OH

Driver Short Circuit Current V_OL

+/-250

+/-200

µA

-7V ≤ V_O≤ +10V

V_O= -7V to +ꢀ0V

High Impedance Output

Current

+/-2

POWER REQUIREMENTS

Supply Voltage

4.75

5.25

ꢀ0

Volts

µA

Supply Current

0.5

0.ꢀ

No load, output enabled

No load, output disabled

Supply Current

ꢀ0

µA

Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 5ꢀ0-668-70ꢀ7 • www.exar.com

SP486_487_ꢀ00_06ꢀ6ꢀꢀ

ELECTRICAL CHARACTERISTICS

V_CC= +5.0V +/-5%; typicals at 25°C; T_MIN≤ T_AMB≤T_MAXunless otherwise noted.

PARAMETERS

MIN.

TYP.

MAX.

UNITS CONDITIONS

ENVIRONMENTAL AND MECHANICAL

Operating Temperature, _C

Operating Temperature, _E

Storage Temperature

Package -_T

+70

+85

°C

-40

-65

+ꢀ50

ꢀ6-pin SOIC

AC CHARACTERISTICS

Maximum Data Rate

ꢀ0

Mbps

Propagation Delay, t_PLH

R_DIFF= 54 ohms, C_Lꢀ= C_L2= ꢀ00pF;

Figure 2

Propagation Delay, t_PHL

Differential Driver Skew

ꢀ5

R_DIFF= 54 ohms, C_Lꢀ= C_L2= ꢀ00pF;

Figure 2

R_DIFF= 54 ohms, C_Lꢀ= C_L2= ꢀ00pF;

Figure 2

Driver Rise Time (t_R)

ꢀ0% to 90%

90% to ꢀ0%

Driver Fall Time (t_F)

Driver Enable to output High

ꢀꢀ0

ꢀꢀ5

ꢀ30

C_L= ꢀ00pF, Figures 3 and 5

(S2 closed)

Driver Enable to output Low

Driver Disable from output High

Driver Disable from output Low

C_L= ꢀ00pF, Figures 3 and 5

(Sꢀ closed)

C_L= ꢀ5pF, Figures 3 and 5

(S2 closed)

C_L= ꢀ5pF, Figures 3 and 5

(Sꢀ closed)

Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 5ꢀ0-668-70ꢀ7 • www.exar.com

SP486_487_ꢀ00_06ꢀ6ꢀꢀ

PIN FUNCTION

SP486

Pin Function SP486

Pin 9 - DI₃- Driver 3 Input - If driver 3 output is

enabled, a logic 0 on DI_ꢀforces driver output DO₃A

low and DO₃B high. A logic ꢀ on DI₃with driver 3

output enabled forces driver DO₃A high and DO₃B

low.

Pin ꢀ - DI_ꢀ- Driver ꢀ Input - If driver ꢀ output is

enabled, a logic 0 on DI_ꢀforces driver output DO_ꢀA

low and DO_ꢀB high. A logic ꢀ on DI_ꢀwith driver ꢀ

output enabled forces driver DO_ꢀA high and DO_ꢀB

low.

Pin ꢀ0 - DO₃A - Driver 3 output A.

Pin ꢀꢀ - DO₃B - Driver 3 output B.

Pin 2 - DO_ꢀA - Driver ꢀ output A.

Pin 3 - DO_ꢀB - Driver ꢀ output B.

Pin ꢀ2 - EN - Driver Output Disable; Please refer to

SP486 truth table (ꢀ).

Pin 4 - EN - Driver Output Enable; Please refer to

SP486 truth table (ꢀ).

Pin ꢀ3 - DO₄B - Driver 4 output B.

Pin ꢀ4 - DO₄A - Driver 4 output A.

Pin 5 - DO₂B - Driver 2 output B.

Pin 6 - DO₂A - Driver 2 output A.

Pin ꢀ5 - DI₄- Driver 4 Input - If driver 4 output is

enabled, a logic 0 on DI₄forces driver output DO₄A

low and DO₄B high. A logic ꢀ on DI₄with driver 4

output enabled forces driver DO₄A high and DO₄B

low.

Pin 7 - DI₂- Driver 2 Input - If driver 2 output is

enabled, a logic 0 on DI₂forces driver output DO₂A

low and DO₂B high. A logic ꢀ on DI₂with driver 2

output enabled forces driver DO₂A high and DO₂B

low.

Pin 16 - Supply Voltage - +4.75V ≤ Vcc ≤ +5.25V.

Pin 8 - GND - Ground.

Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 5ꢀ0-668-70ꢀ7 • www.exar.com

SP486_487_ꢀ00_06ꢀ6ꢀꢀ

PIN FUNCTION

SP487

Pin Function SP487

Pin ꢀ - DI_ꢀ- Driver ꢀ Input - If driver ꢀ output is

enabled, a logic 0 on DI_ꢀforces driver output DO_ꢀA

low and DO_ꢀB high. A logic ꢀ on DI_ꢀwith driver ꢀ

output enabled forces driver DO_ꢀA high and DO_ꢀB

low.

Pin 9 - DI₃- Driver 3 Input - If driver 3 output is

enabled, a logic 0 on DI_ꢀforces driver output DO₃A

low and DO₃B high. A logic ꢀ on DI₃with driver 3

output enabled forces driver DO₃A high and DO₃B

low.

Pin 2 - DO_ꢀA - Driver ꢀ output A.

Pin 3 - DO_ꢀB - Driver ꢀ output B.

Pin ꢀ0 - DO₃A - Driver 3 output A.

Pin ꢀꢀ - DO₃B - Driver 3 output B.

Pin 4 - EN_ꢀ/EN₂- Driver ꢀ and 2 Output Enable;

Please refer to SP487 truth table (2).

Pin ꢀ2 - EN₃/EN₄- Driver 3 and 4 Output Enable;

Please refer to SP487 truth table (2)..

Pin 5 - DO₂B - Driver 2 output B.

Pin 6 - DO₂A - Driver 2 output A.

Pin ꢀ3 - DO₄B - Driver 4 output B.

Pin ꢀ4 - DO₄A - Driver 4 output A.

Pin 7 - DI₂- Driver 2 Input - If driver 2 output is

enabled, a logic 0 on DI₂forces driver output DO₂A

low and DO₂B high. A logic ꢀ on DI₂with driver 2

output enabled forces driver DO₂A high and DO₂B

low.

Pin ꢀ5 - DI₄- Driver 4 Input - If driver 4 output is

enabled, a logic 0 on DI₄forces driver output DO₄A

low and DO₄B high. A logic ꢀ on DI₄with driver 4

output enabled forces driver DO₄A high and DO₄B

low.

Pin 8 - GND - Ground.

Pin 16 - Supply Voltage - +4.75V ≤ Vcc ≤ +5.25V.

Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 5ꢀ0-668-70ꢀ7 • www.exar.com

SP486_487_ꢀ00_06ꢀ6ꢀꢀ

TEST CIRCUITS

V_OD

V_OC

Figure ꢀ. Driver DC Test Load

Figure 2. Driver Timing Test

500 ohms

OUTPUT

UNDER TEST

Figure 3. Driver Timing Test Load

f =1MHz; t_R<10ns, t_F<10ns

1.5V

+3V

1.5V

t_PLH

t_PHL

1/2V_O

V_O

V_DIFF= V(A) - V(B)

90%

+V_O

90%

10%

^10%t_R

–

V_O

t_F

Figure 4. Driver Propagation Delays

f = 1MHz; t

+3V

;t < 10ns

_R< 10ns

1.5V

t_ZL

2.3V

t_LZ

A,B

Output normally LOW

Output normally HIGH

0.5V

V_OL

V_OH

A,B

2.3V

t_ZH

t_HZ

Figure 5. Driver Enable/Disable Timing

Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 5ꢀ0-668-70ꢀ7 • www.exar.com

SP486_487_ꢀ00_06ꢀ6ꢀꢀ

DESCRIPTION

The SP486 and SP487 are low power quad

differential line drivers meeting RS-485 and

RS-422 standards. The SP486 features

active high and active low common driver

enable controls; the SP487 provides inde-

pendent, active high driver enable controls

for each pair of drivers. The driver outputs

areshort-circuitlimitedto200mA.Datarates

up to ꢀ0Mbps are supported. The SP486

and SP487 are available in a ꢀ6-pin SOIC

package.

INPUT

ENABLES

OUTPUTS

OUTA

OUTB

Hi-Z

Table ꢀ. SP486 Truth Table

INPUT

ENABLES

OUTPUTS

OUTA OUTB

EN₁/EN₂or EN₃/EN₄

Hi-Z

Table 2. SP487 Truth Table

Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 5ꢀ0-668-70ꢀ7 • www.exar.com

SP486_487_ꢀ00_06ꢀ6ꢀꢀ

Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 5ꢀ0-668-70ꢀ7 • www.exar.com

SP486_487_ꢀ00_06ꢀ6ꢀꢀ

ORDERING INFORMATION

Model

Temperature Range

Package Types

SP486CT-L..........................................................................0°C to +70°C................................................................................................ꢀ6-pin SOIC

SP486CT-L/TR....................................................................0°C to +70°C................................................................................................ꢀ6-pin SOIC

SP486ET-L...................................................................... -40°C to +85°C..................................................................................................ꢀ6-pin SOIC

SP486ET-L/TR................................................................. -40°C to +85°C.................................................................................................ꢀ6-pin SOIC

SP487CT-L..........................................................................0°C to +70°C................................................................................................ꢀ6-pin SOIC

SP487CT-L/TR.................................................................... 0°C to +70°C.................................................................................................ꢀ6-pin SOIC

SP487ET-L.......................................................................-40°C to +85°C................................................................................................ꢀ6-pin SOIC

SP487ET-L/TR................................................................. -40°C to +85°C.................................................................................................ꢀ6-pin SOIC

Note: /TR = Tape and Reel

REVISION HISTORꢁ

DATE

REVISION DESCRIPTION

June 2005

June 20ꢀꢀ

Legacy Sipex Datasheet

ꢀ.0.0

Update ordering information per PDN ꢀꢀ05ꢀ0-0ꢀ and convert to Exar Format

Notice

EXAR Corporation reserves the right to make changes to any products contained in this publication in order to improve design, performance or reliabil-

ity. EXAR Corporation assumes no representation that the circuits are free of patent infringement. Charts and schedules contained herein are only for

illustration purposes and may vary depending upon a user's speciﬁc application. While the information in this publication has been carefully checked;

no responsibility, however, is assumed for inaccuracies.

EXAR Corporation does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can

reasonably be expected to cause failure of the life support system or to signiﬁcantly affect its safety or effectiveness. Products are not authorized for

use in such applications unless EXAR Corporation receives, in writting, assurances to its satisfaction that: (a) the risk of injury or damage has been

minimized ; (b) the user assumes all such risks; (c) potential liability of EXAR Corporation is adequately protected under the circumstances.

Datasheet June 20ꢀꢀ

For technical support please email Exar's Serial Technical Support group at: serialtechsupport@exar.com

Reproduction, in part or whole, without the prior written consent of EXAR Corporation is prohibited.

Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 5ꢀ0-668-70ꢀ7 • www.exar.com

SP486_487_ꢀ00_06ꢀ6ꢀꢀ

SP487CT-L [EXAR]

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