ISL81486_技术文档

ISL4486, ISL81486

®

Data Sheet

August 2004

FN6060.2

5V, Ultra High Speed, PROFIBUS®,

RS-485/RS-422 Transceivers

Features

• Specified for 10% Tolerance Supplies

The Intersil ISL4486 and ISL81486 are BiCMOS, 5V

powered, single transceivers that meet both the RS-485 and

RS-422 standards for balanced communication, and feature

the larger output voltage and higher data rate - up to

40Mbps - required by high speed PROFIBUS applications.

• High Data Rates

ISL4486 . . . . . . . . . . . . . . . . . . . . . . . . . . up to 40Mbps

ISL81486 . . . . . . . . . . . . . . . . . . . . . . . . . up to 30Mbps

• Large Differential Output Voltage . . . . . . . . . . 3V into 54Ω

• Low Bit-to-Bit (Part-to-Part) Skew for Parallel Applications

• 0.6 Unit Load Allows up to 50 Devices on the Bus

• ISL81486 is a Drop-In Replacement for the ADM1486

• Low Quiescent Current . . . . . . . . . . . . . . . . . . . . . 800µA

• -7V to +12V Common Mode Input Voltage Range

• Three-State Rx and Tx Outputs

Unlike competitive products, these Intersil devices are

specified for 10% tolerance supplies (4.5V to 5.5V) and

deliver at least a 2.3V differential output voltage over this

supply range. At the 5% tolerance specified by many

competitors, the ISL4486 delivers an unsurpassed 2.5V

differential signal into a 54Ω total load. This translates into

longer reach, or better data integrity, at the exceptional

40Mbps data rate.

• 14ns (Max) Propagation Delays, 2ns (Max) Skew

• Operates from a Single +5V Supply (10% Tolerance)

SCSI applications benefit from the ISL4486’s low receiver

and transmitter part-to-part skews, which make it perfect for

high speed parallel applications where large numbers of bits

must be simultaneously captured. The low bit-to-bit skew

eases the timing constraints on the data latching signal.

• Current Limiting and Thermal Shutdown for driver

Overload Protection

• Pb-free available

These devices present a “0.6 unit load” to the RS-485 bus,

which allows up to 50 transceivers on the network.

Applications

Receiver (Rx) inputs feature a “fail-safe if open” design,

which ensures a logic high Rx output if Rx inputs are floating.

• SCSI “Fast 40” Drivers and Receivers

• PROFIBUS DP and FMS Networks

• Factory Automation

Driver (Tx) outputs are short circuit protected, even for

voltages exceeding the power supply voltage. Additionally,

on-chip thermal shutdown circuitry disables the Tx outputs to

prevent damage if power dissipation becomes excessive.

• Field Bus Networks

• Security Networks

• Building Environmental Control Systems

• Industrial/Process Control Networks

Ordering Information

TEMP.

PKG.

PART NO. (BRAND) RANGE (°C)

PACKAGE

8 Ld SOIC

(Pb-free)

8 Ld MSOP

(Pb-free)

8 Ld SOIC

(Pb-free)

DWG. #

ISL4486IB (4486IB)

ISL4486IBZ (4486IB)

(See Note)

-40 to 85

M8.15

Pinout

ISL4486, ISL81486 (SOIC, MSOP)

TOP VIEW

ISL4486IU (4486)

ISL4486IUZ (4486)

(See Note)

-40 to 85

M8.118

RO

RE

DE

DI

1

2

3

4

8

7

6

5

V

CC

R

D

B/Z

ISL81486IB (81486IB)

ISL81486IBZ

(81486IB) (See Note)

-40 to 85

M8.15

A/Y

GND

ISL81486IU (1486)

ISL81486IUZ (1486)

(See Note)

-40 to 85

8 Ld MSOP

(Pb-free)

M8.118

*Add “-T” suffix to part number for tape and reel packaging.

NOTE: Intersil Pb-free products employ special Pb-free material sets; molding

compounds/die attach materials and 100% matte tin plate termination finish, which

is compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free

products are MSL classified at Pb-free peak reflow temperatures that meet or

exceed the Pb-free requirements of IPC/JEDEC J Std-020B.

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

1

1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc.

All other trademarks mentioned are the property of their respective owners.

ISL4486, ISL81486

Truth Table

TRANSMITTING

RECEIVING

INPUTS

OUTPUTS

INPUTS

OUTPUT

RE

X

DE

1

DI

1

B/Z

A/Y

RE

0

DE

0

A-B

≥ +0.2V

≤ -0.2V

Inputs Open

X

RO

0

1

0

1

X

1

0

1

X

0

X

High-Z

0

1

X

High-Z

Pin Descriptions

FUNCTION

RO

RE

Receiver output: If A > B by at least 0.2V, RO is high; If A < B by 0.2V or more, RO is low; RO = High if A and B are unconnected (floating).

Receiver output enable. RO is enabled when RE is low; RO is high impedance when RE is high.

Driver output enable. The driver outputs, Y and Z, are enabled by bringing DE high. They are high impedance when DE is low.

Driver input. A low on DI forces output Y low and output Z high. Similarly, a high on DI forces output Y high and output Z low.

Ground connection.

DE

DI

GND

A/Y

B/Z

RS-485/422 level, noninverting receiver input and noninverting driver output. Pin is an input (A) if DE = 0; pin is an output (Y) if DE = 1.

RS-485/422 level, inverting receiver input and inverting driver output. Pin is an input (B) if DE = 0; pin is an output (Z) if DE = 1.

System power supply input (4.5V to 5.5V).

V

CC

Typical Operating Circuit

ISL4486

+5V

+

0.1µF

8

V

8

V

CC

RO

1

2

4

DI

R

D

RE

DE

R

T

R

T

3

2

7

6

7

6

B/Z

A/Y

DE

RE

B/Z

A/Y

3

4

DI

1

RO

R

D

GND

5

GND

5

2

ISL4486, ISL81486

Absolute Maximum Ratings

Thermal Information

Thermal Resistance (Typical, Note 1)

8 Ld SOIC Package . . . . . . . . . . . . . . . . . . . . . . . . .

8 Ld MSOP Package . . . . . . . . . . . . . . . . . . . . . . . .

Maximum Junction Temperature (Plastic Package) . . . . . . . 150°C

Maximum Storage Temperature Range. . . . . . . . . . .-65°C to 150°C

Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . 300°C

(Lead Tips Only)

V

to Ground. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V

θ

JA

(°C/W)

105

140

CC

Input Voltages

DI, DE, RE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to 7V

Input/Output Voltages

A/Y, B/Z . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -8V to +12.5V

RO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to (V

Short Circuit Duration

+0.5V)

CC

Y, Z . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Continuous

Operating Conditions

Temperature Range

ISLXX86IX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to 85°C

CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the

device at these or any other conditions above those indicated in the operational sections of this specification is not implied.

NOTE:

1. θ is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details.

JA

Electrical Specifications

Test Conditions: V

Note 2

= 4.5V to 5.5V; Unless Otherwise Specified. Typicals are at V

= 5V, T = 25°C,

CC A

CC

TEMP

PARAMETER

SYMBOL

TEST CONDITIONS

(°C)

MIN

TYP

MAX UNITS

DC CHARACTERISTICS

Driver Differential V

(no load)

V

Full

-

3.7

3

V

OUT

OD1

OD2

CC

-

(with load)

R = 50Ω (RS-422) (Figure 1A)

2.5

OUT

R = 27Ω (RS-485), V

≥ 4.75V (Figure 1A,

5

CC

ISL4486 Only)

R = 27Ω (RS-485), V

= 4.5V (Figure 1A)

Full

2.3

2.4

-

5

-

V

CC

R

= 60Ω, -7V ≤ V

≤ 12V, V

≥ 4.75V

CC

D

CM

(Figure 1B)

Change in Magnitude of Driver

Differential V for

∆V

R = 27Ω or 50Ω, (Figure 1A)

Full

-

0.01

0.2

V

OD

OUT

Complementary Output States

Driver Common-Mode V

V

R = 27Ω or 50Ω (Figure 1A)

Full

-

3

V

OUT

Change in Magnitude of Driver

Common-Mode V for

OC

∆V

0.01

0.2

OC

OUT

Complementary Output States

Logic Input High Voltage

Logic Input Low Voltage

Logic Input Current

V

DE, DI, RE

Full

2

-

V

IH

V

0.8

1

IL

I

-1

µA

mA

V

IN1

IN2

Input Current (A/Y, B/Z) (Note 5)

I

DE = 0V, V

4.5 to 5.5V

= 0V or

V

= 12V

= -7V

-

0.6

-

CC

IN

-0.35

-0.2

Receiver Differential Threshold

Voltage

V

-7V ≤ V

≤ 12V

0.2

TH

CM

Receiver Input Hysteresis

Receiver Output High Voltage

Receiver Output Low Voltage

∆V

V

= 0V

25

-

4

-

40

-

mV

V

TH

CM

V

I

= -4mA, V = 200mV

ID

Full

OH

O

V

= -4mA, V = 200mV

ID

-

0.4

±1

V

OL

Three-State (high impedance)

Receiver Output Current

I

0.4V ≤ V ≤ 2.4V

-

µA

OZR

O

Receiver Input Resistance

R

-7V ≤ V

≤ 12V (Note 7)

Full

20

-

1

-

2

kΩ

mA

IN

CM

DI, RE = 0V or V

No-Load Supply Current (Note 3)

I

DE = V

CC

DE = 0V

-

0.8

1.5

3

ISL4486, ISL81486

Electrical Specifications

Test Conditions: V

= 4.5V to 5.5V; Unless Otherwise Specified. Typicals are at V

= 5V, T = 25°C,

CC A

CC

Note 2 (Continued)

TEMP

PARAMETER

SYMBOL

TEST CONDITIONS

DE = V , -7V ≤ V or V ≤ 12V (Note 4)

(°C)

MIN

TYP

MAX UNITS

Driver Short-Circuit Current,

I

Full

60

-

250

mA

OSD1

CC

Y

Z

V

= High or Low

O

Receiver Short-Circuit Current

SWITCHING CHARACTERISTICS

Driver Input to Output Prop Delay

I

0V ≤ V ≤ V

CC

Full

7

-

85

mA

OSR

O

t

, t

PLH PHL

R

C

= 54Ω,

ISL4486

ISL81486

= 54Ω, C = 100pF, ISL4486 Only (Note 6,

Full

3

-

9

0

14

17

6

ns

DIFF

L

= 100pF (Figure 2)

Prop Delay Delta, Min-to-Max

t

R

DP-PSKEW

DIFF

L

Figure 2)

Driver Prop Delay Skew

t

R

= 54Ω, C = 100pF (Figure 2)

Full

-

0

5

7

9

1

2

8

ns

SKEW

t , t

DIFF

L

Driver Differential Rise or Fall Time

R

C

= 54Ω,

= 100pF (Figure 2)

ISL4486

R

F

DIFF

L

ISL81486

15

3

Driver Enable to Output High

Driver Enable to Output Low

Matched Enable Switching

t

C

= 50pF, SW = GND (Figure 3)

ZH

L

t

= 50pF, SW = V (Figure 3)

CC

ZL

∆t

L

At Identical Test Conditions (Figure 3)

EN

|t

- t

AZH BZL

| or |t

- t |

BZH AZL

Driver Disable from Output High

Driver Disable from Output Low

Matched Disable Switching

t

C

= 50pF, SW = GND (Figure 3)

Full

-

9

2

15

5

ns

HZ

L

t

= 50pF, SW = V

(Figure 3)

CC

LZ

L

∆t

At Identical Test Conditions (Figure 3)

DIS

|t

- t

AHZ BLZ

| or |t

- t |

BHZ ALZ

Driver Maximum Data Rate

f

|V | ≥ 1.5V (Figure 4) ISL4486

Full

40

30

11

6

-

Mbps

ns

MAXD

OD

ISL81486

Receiver Input to Output Prop

Delay

t

, t

PLH PHL

(Figure 5)

ISL4486

17

0

25

9

ISL81486

ns

Prop Delay Delta, Min-to-Max

Receiver Prop Delay Skew

t

ISL4486 Only (Note 6, Figure 5)

Figure 5

-

ns

RP-PSKEW

t

-

0.5

3

ns

SKD

| t |

- t

PLH PHL

Receiver Enable to Output High

Receiver Enable to Output Low

Receiver Disable from Output High

Receiver Disable from Output Low

Receiver Maximum Data Rate

NOTES:

t

C

= 15pF, SW = GND (Figure 6)

Full

-

7

-

13

-

ns

ZH

L

t

= 15pF, SW = V

(Figure 6)

ZL

CC

= 15pF, SW = GND (Figure 6)

= 15pF, SW = V (Figure 6)

-

ns

HZ

t

-

ns

LZ

CC

= 15pF, V ≥ 1.5V, RO t and t ≥ 20ns

f

40

Mbps

MAXR

ID

H

L

2. All currents into device pins are positive; all currents out of device pins are negative. All voltages are referenced to device ground unless

otherwise specified.

3. Supply current specification is valid for loaded drivers when DE = 0V.

4. Applies to peak current. See “Typical Performance Curves” for more information.

5. Devices meeting these limits are denoted as “0.6 unit load (UL)” transceivers. The RS-485 standard allows up to 32 Unit Loads on the bus, so

a 0.6UL transceiver permits > 50 devices on the bus.

6. This is the part-to-part skew between any two units tested with identical test conditions (Temperature, V , etc.).

CC

4

ISL4486, ISL81486

Test Circuits and Waveforms

R

375Ω

DE

DI

V

CC

Z

Y

Z

Y

V

CM

DI

R

= 60Ω

V

OD

D

OD

-7V to +12V

V

R

375Ω

OC

FIGURE 1A. V

AND V

FIGURE 1B. V

WITH COMMON MODE LOAD

OD

OC

OD

FIGURE 1. DC DRIVER TEST CIRCUITS

3V

DI

1.5V

PLH

1.5V

0V

t

PHL

V

OH

C

= 100pF

L

50%

OUT (Y)

DE

DI

V

CC

OL

Z

Y

R

t

DIFF

D

PHL

PLH

C

V

L

OH

OUT (Z)

50%

90%

SIGNAL

GENERATOR

V

OL

+V

OD

90%

10%

DIFF OUT (Y - Z)

10%

-V

OD

t

R

F

SKEW = |CROSSING PT. OF Y↑ & Z↓ - CROSSING PT. OF Y↓ & Z↑|

FIGURE 2A. TEST CIRCUIT

FIGURE 2B. MEASUREMENT POINTS

FIGURE 2. DRIVER PROPAGATION DELAY AND DIFFERENTIAL TRANSITION TIMES

DE

DI

3V

0V

Z

Y

110Ω

DE

V

1.5V

HZ

CC

D

GND

SW

SIGNAL

GENERATOR

C

L

t

ZH

t

OUTPUT HIGH

2.3V

V

OH

V

- 0.5V

OH

OUT (Y, Z)

PARAMETER OUTPUT

RE

X

DI

SW

GND

C (pF)

L

0V

t

Y/Z

1/0

0/1

1/0

0/1

50

HZ

t

ZL

t

LZ

t

X

V

50

LZ

CC

GND

V

CC

t

X

ZH

2.3V

V

+ 0.5V

V

OL

t

X

V

CC

ZL

OUTPUT LOW

FIGURE 3A. TEST CIRCUIT

FIGURE 3B. MEASUREMENT POINTS

FIGURE 3. DRIVER ENABLE AND DISABLE TIMES

5

ISL4486, ISL81486

Test Circuits and Waveforms (Continued)

C

= 100pF

L

DE

DI

V

CC

3V

0V

Z

Y

DI

R

DIFF

D

C

= 100pF

L

SIGNAL

GENERATOR

+V

OD

DIFF OUT (Y - Z)

0V

-V

OD

FIGURE 4A. TEST CIRCUIT

FIGURE 4B. MEASUREMENT POINTS

FIGURE 4. DRIVER DATA RATE

RE

B

A

3V

0V

15pF

A

1.5V

PLH

1.5V

PHL

+1.5V

RO

R

t

V

SIGNAL

GENERATOR

CC

50%

RO

0V

FIGURE 5A. TEST CIRCUIT

FIGURE 5B. MEASUREMENT POINTS

FIGURE 5. RECEIVER PROPAGATION DELAY

3V

0V

RE

B

RE

1.5V

HZ

1kΩ

V

CC

RO

R

GND

SW

SIGNAL

GENERATOR

A

t

ZH

t

15pF

OUTPUT HIGH

1.5V

V

OH

V

- 0.5V

OH

RO

0V

PARAMETER

DE

0

A

SW

GND

t

ZL

LZ

t

+1.5V

-1.5V

+1.5V

-1.5V

HZ

V

CC

t

V

LZ

CC

GND

1.5V

t

V

+ 0.5V

V

ZH

OL

OUTPUT LOW

t

V

ZL

CC

FIGURE 6A. TEST CIRCUIT

FIGURE 6B. MEASUREMENT POINTS

FIGURE 6. RECEIVER ENABLE AND DISABLE TIMES

6

ISL4486, ISL81486

Data Rate, Cables, and Terminations

Application Information

Twisted pair is the cable of choice for RS-485, RS-422, and

PROFIBUS networks. Twisted pair cables tend to pick up

noise and other electromagnetically induced voltages as

common mode signals, which are effectively rejected by the

differential receivers in these ICs.

RS-485 and RS-422 are differential (balanced) data

transmission standards for use in long haul or noisy

environments. RS-422 is a subset of RS-485, so RS-485

transceivers are also RS-422 compliant. RS-422 is a point-

to-multipoint (multidrop) standard, which allows only one

driver and up to 10 (assuming one unit load devices)

receivers on each bus. RS-485 is a true multipoint standard,

which allows up to 32 one unit load devices (any mix of

drivers and receivers) on each bus. To allow for multipoint

operation, the RS-485 spec requires that drivers must

handle bus contention without sustaining any damage.

RS-485/RS-422 are intended for network lengths up to 4000’

(~1200m), but the maximum system data rate decreases as

the transmission length increases. According to guidelines in

the RS-422 and PROFIBUS specifications, networks

operating at data rates in excess of 3Mbps should be limited

to cable lengths of 100m (328 feet) or less, and the

PROFIBUS specification recommends that the more

expensive “Type A” (22AWG) cable be used. Nevertheless,

the ISL4486’s large differential output swing, fast transition

times, and high drive-current output stages allow operation

at 40Mbps over standard “CAT5” cables in excess of 400

feet (121m). Figure 8 details the ISL4486 performance at

this condition, with a 120Ω termination resistor at both the

driver and the receiver ends. Note that the differential signal

delivered to the receiver at the end of the cable (A-B) still

exceeds 1V, so even longer cables could be driven if lower

noise margins are acceptable. If more noise margin is

desired, shorter cables produce a larger receiver input signal

as illustrated in Figure 7. Performance should be even better

if the “Type A” cable is utilized. The lower data rate of the

ISL81486 allows for driving longer cables.

Another important advantage of RS-485 is the extended

common mode range (CMR), which specifies that the driver

outputs and receiver inputs withstand signals that range from

+12V to -7V. RS-422 and RS-485 are intended for runs as

long as 4000’ (~1200m), so the wide CMR is necessary to

handle ground potential differences, as well as voltages

induced in the cable by external fields.

Receiver Features

These devices utilize a differential input receiver for maximum

noise immunity and common mode rejection. Input sensitivity

is ±200mV, as required by the RS422 and RS-485

specifications. Receiver inputs function with common mode

voltages as great as 7V outside the power supplies (i.e.,

+12V and -7V), making them ideal for long networks, or

industrial environments, where induced voltages are a

realistic concern.

To minimize reflections, proper termination is imperative when

using these high data rate transceivers. In point-to-point, or

point-to-multipoint (single driver on bus) networks, the main

cable should be terminated in its characteristic impedance

(typically 120Ω for “CAT5”, and 220Ω for “Type A”) at the end

farthest from the driver. In multi-receiver applications, stubs

connecting receivers to the main cable should be kept as

short as possible. Multipoint (multi-driver) systems require that

the main cable be terminated in its characteristic impedance

at both ends. Stubs connecting a transceiver to the main cable

should be kept as short as possible.

Receiver input resistance surpasses the RS-422 spec of

4kΩ, and exceeds the RS-485 “Unit Load” requirement of

12kΩ minimum. The 20kΩ input resistance allows at least 50

devices on the RS-485 bus. All the receivers include a “fail-

safe if open” function that guarantees a high level receiver

output if the receiver inputs are unconnected (floating).

Receivers easily meet the data rate supported by the driver,

and receiver outputs are three-statable via the active low RE

input.

Built-In Driver Overload Protection

As stated previously, the RS-485 spec requires that drivers

survive worst case bus contentions undamaged. These

transmitters meet this requirement via driver output short

circuit current limits, and on-chip thermal shutdown circuitry.

Driver Features

The RS-485/RS-422 driver is a differential output device that

delivers at least 2.3V across a 54Ω load (RS-485/

PROFIBUS), and at least 2.5V across a 100Ω load (RS-422)

The driver output stages incorporate short circuit current

limiting circuitry which ensures that the output current never

exceeds the RS-485 spec, even at the common mode

voltage range extremes. In the event of a major short circuit

condition, the devices also include a thermal shutdown

feature that disables the drivers whenever the die

even with V

= 4.5V. The drivers feature low propagation

CC

delay skew to maximize bit width, and to minimize EMI.

Outputs of the drivers are not slew rate limited, so faster

output transition times allow data rates of at least 40Mbps

with the ISL4486, and 30Mbps with the ISL81486. Driver

outputs are three-statable via the active high DE input.

temperature becomes excessive. This eliminates the power

dissipation, allowing the die to cool. The drivers

For parallel applications, bit-to-bit skews between any two

ISL4486 transmitter and receiver pairs are guaranteed to be

no worse than 15ns (6ns max for any two Tx, 9ns max for

any two Rx).

automatically reenable after the die temperature drops about

15 degrees. If the contention persists, the thermal

shutdown/reenable cycle repeats until the fault is cleared.

Receivers stay operational during thermal shutdown.

7

ISL4486, ISL81486

Typical Performance Curves V = 5V, T = 25°C, ISL4486 and ISL81486; Unless Otherwise Specified

CC

A

DI = 40Mbps

5

0

5

0

5

0

5

0

RO

DRIVER+CABLE DELAY (~290ns)

A - B

DRIVER+CABLE DELAY

(~585ns)

3

1.5

0

3

1.5

0

A - B

-1.5

-3

-1.5

-3

TIME (10ns/DIV)

FIGURE 7. ISL4486 DRIVER AND RECEIVER WAVEFORMS

DRIVING 200 FEET (61 METERS) OF CAT5

FIGURE 8. ISL4486 DRIVER AND RECEIVER WAVEFORMS

DRIVING 400 FEET (121 METERS) OF CAT5

CABLE (DOUBLE TERMINATED WITH 120Ω)

950

5

R

= 54Ω, C = 100pF

DIFF

L

4

3

2

1

0

DE = V , RE = X

CC

A/Y

900

850

800

750

700

B/Z

3

DE = GND, RE = X

1.5

A/Y - B/Z

0

-1.5

-3

-40

0

50

85

-25

25

75

TIME (10ns/DIV)

TEMPERATURE (°C)

FIGURE 9. ISL81486 DRIVER WAVEFORMS AT 30Mbps

FIGURE 10. SUPPLY CURRENT vs TEMPERATURE

4

PER FIGURE 4

120

100

80

60

40

20

0

3.8

3.6

3.4

3.2

3

R

= 100Ω

DIFF

R

= 54Ω

DIFF

2.8

-40

0

50

85

0

1

2

3

4

5

-25

25

75

DIFFERENTIAL OUTPUT VOLTAGE (V)

TEMPERATURE (°C)

FIGURE 11. DRIVER OUTPUT CURRENT vs DIFFERENTIAL

OUTPUT VOLTAGE

FIGURE 12. DRIVER DIFFERENTIAL OUTPUT VOLTAGE vs

TEMPERATURE

8

ISL4486, ISL81486

Typical Performance Curves V = 5V, T = 25°C, ISL4486 and ISL81486; Unless Otherwise Specified (Continued)

CC

A

12

11

10

9

3

2.5

2

R

= 54Ω

R

= 54Ω

DIFF

|t | = PW Distortion

- t

PHL(Y or Z) PLH(Y or Z)

t

PLHZ

t

PLHY

1.5

1

|t

- t

| or |t

- t

|

PHLY PLHZ

PLHY PHLZ

t

PHLY

t

PHLZ

8

0.5

|CROSSING PT. OF Y↑ & Z↓ -

CROSSING PT. OF Y↓ & Z↑|

0

7

-40

0

50

85

-25

25

75

-40

0

50

85

-25

25

75

TEMPERATURE (°C)

FIGURE 14. DRIVER SKEW AND PULSE DISTORTION vs

FIGURE 13. DRIVER PROPAGATION DELAY vs

TEMPERATURE

R

= 54Ω, C = 15pF

R

= 54Ω, C = 15pF

DIFF L

DIFF

L

5

0

5

0

DI

5

0

5

0

RO

5

4

3

2

1

0

4

3

2

1

0

B/Z

A/Y

B/Z

TIME (10ns/DIV)

FIGURE 15. DRIVER AND RECEIVER WAVEFORMS,

FIGURE 16. DRIVER AND RECEIVER WAVEFORMS,

LOW TO HIGH

HIGH TO LOW

160

140

120

100

80

Die Characteristics

SUBSTRATE POTENTIAL (POWERED UP):

Y OR Z = LOW

60

40

GND

TRANSISTOR COUNT:

20

0

528

-20

-40

-60

-80

PROCESS:

Y OR Z = HIGH

Si Gate BiCMOS

-100

-120

-140

-160

-7 -6

-4

-2

0

2

4

6

8

10

12

OUTPUT VOLTAGE (V)

FIGURE 17. DRIVER OUTPUT CURRENT vs SHORT CIRCUIT

VOLTAGE

9

ISL4486, ISL81486

Mini Small Outline Plastic Packages (MSOP)

N

M8.118 (JEDEC MO-187AA)

8 LEAD MINI SMALL OUTLINE PLASTIC PACKAGE

INCHES

MILLIMETERS

E1

E

SYMBOL

MIN

MAX

MIN

0.94

0.05

0.75

0.25

0.09

2.95

MAX

1.10

0.15

0.95

0.36

0.20

3.05

NOTES

A

A1

A2

b

0.037

0.002

0.030

0.010

0.004

0.116

0.043

0.006

0.037

0.014

0.008

0.120

-

-B-

0.20 (0.008)

INDEX

AREA

1 2

A

B

C

-

TOP VIEW

4X θ

9

0.25

(0.010)

R1

L

c

-

R

GAUGE

PLANE

D

3

E1

e

4

SEATING

PLANE

0.026 BSC

0.65 BSC

-

-C-

4X θ

L1

A

A2

E

0.187

0.199

4.75

5.05

-

L

0.016

0.028

0.40

0.70

6

SEATING

PLANE

L1

N

0.037 REF

0.95 REF

-

0.10 (0.004)

-A-

C

b

8

7

-H-

A1

e

R

0.003

-

0.07

-

D

0.20 (0.008)

C

R1

0

-

o

5

15

5

15

-

a

SIDE VIEW

C

L

o

0

6

0

6

-

α

E

1

-B-

Rev. 2 01/03

0.20 (0.008)

C

D

END VIEW

NOTES:

1. These package dimensions are within allowable dimensions of

JEDEC MO-187BA.

2. Dimensioning and tolerancing per ANSI Y14.5M-1994.

3. Dimension “D” does not include mold flash, protrusions or gate

burrs and are measured at Datum Plane. Mold flash, protrusion

and gate burrs shall not exceed 0.15mm (0.006 inch) per side.

4. Dimension “E1” does not include interlead flash or protrusions

- H -

and are measured at Datum Plane.

Interlead flash and

protrusions shall not exceed 0.15mm (0.006 inch) per side.

5. Formed leads shall be planar with respect to one another within

0.10mm (0.004) at seating Plane.

6. “L” is the length of terminal for soldering to a substrate.

7. “N” is the number of terminal positions.

8. Terminal numbers are shown for reference only.

9. Dimension “b” does not include dambar protrusion. Allowable

dambar protrusion shall be 0.08mm (0.003 inch) total in excess

of “b” dimension at maximum material condition. Minimum space

between protrusion and adjacent lead is 0.07mm (0.0027 inch).

- B -

-A -

10. Datums

and

to be determined at Datum plane

.

- H -

11. Controlling dimension: MILLIMETER. Converted inch dimen-

sions are for reference only.

10

ISL4486, ISL81486

Small Outline Plastic Packages (SOIC)

M8.15 (JEDEC MS-012-AA ISSUE C)

N

8 LEAD NARROW BODY SMALL OUTLINE PLASTIC

PACKAGE

INDEX

0.25(0.010)

M

B M

H

AREA

E

INCHES

MILLIMETERS

-B-

SYMBOL

MIN

MAX

MIN

1.35

0.10

0.33

0.19

4.80

3.80

MAX

1.75

0.25

0.51

0.25

5.00

4.00

NOTES

A

A1

B

C

D

E

e

0.0532

0.0040

0.013

0.0688

0.0098

0.020

-

1

2

3

L

-

9

SEATING PLANE

A

0.0075

0.1890

0.1497

0.0098

0.1968

0.1574

-

-A-

o

h x 45

D

3

4

-C-

α

µ

0.050 BSC

1.27 BSC

-

e

A1

H

h

0.2284

0.0099

0.016

0.2440

0.0196

0.050

5.80

0.25

0.40

6.20

0.50

1.27

-

C

B

0.10(0.004)

5

0.25(0.010) M

C A M B S

L

6

N

α

8

7

NOTES:

o

0

8

0

8

-

1. Symbols are defined in the “MO Series Symbol List” in Section 2.2 of

Publication Number 95.

Rev. 0 12/93

2. Dimensioning and tolerancing per ANSI Y14.5M-1982.

3. Dimension “D” does not include mold flash, protrusions or gate burrs.

Mold flash, protrusion and gate burrs shall not exceed 0.15mm (0.006

inch) per side.

4. Dimension “E” does not include interlead flash or protrusions. Inter-

lead flash and protrusions shall not exceed 0.25mm (0.010 inch) per

side.

5. The chamfer on the body is optional. If it is not present, a visual index

feature must be located within the crosshatched area.

6. “L” is the length of terminal for soldering to a substrate.

7. “N” is the number of terminal positions.

8. Terminal numbers are shown for reference only.

9. The lead width “B”, as measured 0.36mm (0.014 inch) or greater

above the seating plane, shall not exceed a maximum value of

0.61mm (0.024 inch).

10. Controlling dimension: MILLIMETER. Converted inch dimensions

are not necessarily exact.

All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems.

Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality

Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without

notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and

reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result

from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.

For information regarding Intersil Corporation and its products, see www.intersil.com

11


型号：	ISL81486
厂家：	Intersil
描述：	5V, Ultra High Speed, PROFIBUS, RS-485/RS-422 Transceivers 5V ，超高速， PROFIBUS ， RS - 485 / RS -422收发器
文件：	总11页 (文件大小：550K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

ISL81486 [INTERSIL]

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