ISL76120_技术文档

ISL76120

®

Data Sheet

May 29, 2008

FN6711.1

Automotive Grade USB 2.0 High/Full

Speed Multiplexer

Features

• High Speed (480Mbps) and Full Speed (12Mbps)

Signaling Capability per USB 2.0

The Intersil ISL76120 dual 2:1 multiplexer IC is a single

supply part that can operate from a single 2.7V to 5.5V supply.

It contains two SPDT (Single Pole/Double Throw) switches

configured as a DPDT. The part was designed for switching

between USB High-Speed and USB Full-Speed sources in

portable battery powered products.

• 1.8V Logic Compatible (2.7V to +3.6V supply)

• Enable Pin to Open all Switches, Simplifies Multiple USB

Client Management

• -3dB Frequency

- HSx Switches. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 880MHz

- FSx Switches. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 550MHz

The normally-closed (NC) FSx switches can swing rail-to-rail

and were specifically designed to pass USB full speed data

signals (12Mbps) that range from 0V to 3.6V. The normally-

open (NO) HSx switches have high bandwidth and low

capacitance and were specifically designed to pass USB high

speed data signals (480Mbps) with minimal distortion.

• Crosstalk @ 1MHz. . . . . . . . . . . . . . . . . . . . . . . . . . -70dB

• Off-Isolation @ 100kHz . . . . . . . . . . . . . . . . . . . . . . -98dB

• Single Supply Operation (V ) . . . . . . . . . . . . 2.7V to 5.5V

DD

• Available in TDFN Package

• Robust ESD rating > 8.5kV HBM

• Ultra-Low Operating Current - 60nA

• -40°C to 105°C Operation

The part can be used in a variety of automotive entertainment

and infotainment applications where consumer USB devices

such as Portable Media Players (PMPs) are to be connected

to embedded systems. The product allows switching between

a high-speed transceiver and a full-speed transceiver while

connected to a single USB host. Additionally the part can be

used for charge control of PMPs.

• AECQ100 Qualified Component

• Pb-Free (RoHS Compliant)

The digital logic inputs are 1.8V logic compatible when

operated with a 2.7V to 3.6V supply. The part has an enable

pin to open all switches. It can be used to facilitate proper bus

disconnect and connection when switching between the USB

sources.

Applications

• Automotive

- USB Docks

- MP3 and PMP Player Attach Kits

- Infotainment Systems

The ISL76120 is available in a 10 Ld 3mm x 3mm TDFN

package. It operates over a temperature range of -40°C to

+105°C.

• After Market Automotive Options

Application Block Diagram

3.3V

µCONTROLLER

V

DD

ISL76120

EN

IN

LOGIC CIRCUITRY

VBUS

D-

USB

HIGH-SPEED

TRANSCEIVER

4MW

HSD1

HSD2

COMD1

USB

FULL-SPEED

TRANSCEIVER

D+

FSD1

FSD2

COMD2

GND

PORTABLE MEDIA DEVICE

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

1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.

1

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

ISL76120

Pinouts

ISL76120

(10 LD TDFN)

TOP VIEW

LOGIC

V

EN

10

9

1

2

3

4

5

DD

CONTROL

4M

IN

HSD1

8

COMD1

COMD2

GND

HSD2

FSD1

FSD2

7

6

NOTE:

1. ISL76120 Switches Shown for IN = Logic “0” and EN = Logic “1”.

Ordering Information

PART NUMBER

(Note)

ISL76120ARTZ

ISL76120ARTZ-T*

*Please refer to TB347 for details on reel specifications.

PART MARKING

6120

TEMP. RANGE (°C)

-40 to +105

PACKAGE (Pb-Free)

10 Ld 3x3 TDFN

10 Ld 3x3 TDFN Tape and Reel

PKG. DWG. #

L10.3x3A

-40 to +105

NOTE: These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100%

matte tin plate plus anneal (e3 termination finish, which is RoHS compliant and 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-020.

Truth Table

Pin Descriptions

ISL76120

FSD1, FSD2

ISL76120

EN

1

IN

0

HSD1, HSD2

OFF

PIN NO.

NAME

FUNCTION

ON

OFF

1

2

V

Power Supply

DD

1

ON

IN

Select Logic Control Input

0

X

OFF

3

COMD1 USB Common Port

COMD2 USB Common Port

Logic “0” when ≤0.5V, Logic “1” when ≥1.4V with a 2.7V to 3.6V

4

Supply. X = Don’t Care

5

GND

FSD2

FSD1

HSD2

HSD1

EN

Ground Connection

6

Full Speed USB Differential Port

High Speed USB Differential Port

Bus Switch Enable

7

8

9

10

FN6711.1

May 29, 2008

2

ISL76120

Absolute Maximum Ratings

Thermal Information

V

to GND. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 6.0V

Thermal Resistance (Typical, Note 3)

θ

(°C/W)

55

DD

Input Voltages

FSD2, FSD1, HSD2, HSD1 (Note 2) . . . . . - 1V to ((V ) +0.3V)

JA

10 Ld 3x3 TDFN Package . . . . . . . . . . . . . . . . . . . .

DD

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

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

Pb-Free Reflow Profile. . . . . . . . . . . . . . . . . . . . . . . . .see link below

http://www.intersil.com/pbfree/Pb-FreeReflow.asp

IN, EN (Note 2). . . . . . . . . . . . . . . . . . . . . -0.3V to ((V ) +0.3V)

DD

Output Voltages

COMD1, COMD2 (Note 2) . . . . . . . . . . . . . . . . . . . . . . . -1V to 5V

Continuous Current (HSD2, HSD1, FSD2, FSD1). . . . . . . . . ±40mA

Peak Current (HSD2, HSD1, FSD2, FSD1)

Operating Conditions

(Pulsed 1ms, 10% Duty Cycle, Max) . . . . . . . . . . . . . . . . ±100mA

Temperature Range. . . . . . . . . . . . . . . . . . . . . . . . -40°C to +105°C

V

Supply Voltage Range . . . . . . . . . . . . . . . . . . . . . 2.7V to 5.5V

DD

CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product reliability and

result in failures not covered by warranty.

NOTES:

2. Signals on FSD1, FSD2, HSD1, HSD2, COMD1, COMD2, EN, IN exceeding V

maximum current ratings.

or GND by specified amount are clamped. Limit current to

DD

3. 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 - 2.7V to 3.6V Supply Test Conditions: V = +3.3V, GND = 0V, V

= 1.4V, V = 0.5V, V

= 0.5V, (Note 4)Parameters with MIN and/or MAX limits are 100% tested at

= 1.4V,

DD

INH

INL ENH

V

ENL

+25°C, unless otherwise specified. Temperature limits established by characteriza-

tion and are not production tested.

TEMP

(°C)

MIN

(Note 5)

MAX

(Note 5) UNITS

PARAMETER

TEST CONDITIONS

TYP

ANALOG SWITCH CHARACTERISTICS

NC Switches (FSD1, FSD2)

Analog Signal Voltage Range,

V

= 3.3V, IN = 0V, EN = 3.3V

Full

0

-

V

DD

V

ANALOG

ON-Resistance, r

V

= 3.3V, IN = 0.5V, EN = 1.4V, I

= 40mA,

= 0V to 3.3V, (See Figure 4)

+25

Full

+25

Full

-

7

10

15

Ω

ON

DD

COMx

or V

FSD2

FSD1

7.8

0.1

0.7

r

Matching Between Channels, Δr

V = 3.3V, IN = 0.5V, EN = 1.4V, I

= 40mA,

over signal range

1.2

1.4

ON

ON DD COMx

V

or V = Voltage at max r

FSD2 ON

FSD1

of 0V to 3.3V, (Note 7)

Flatness, r

FLAT(ON)

V

= 3.3V, IN = 0.5V, EN = 1.4V, I

COMx

= 40mA,

+25

Full

+25

Full

+25

Full

-

4

6

Ω

DD

or V

= 0V to 3.3V, (Note 6)

FSD1

FSD2

-

4.1

0.4

0.6

2

8

Ω

OFF Leakage Current, I

V+ = 3.6V, IN = 3.6V, EN = 0V and 3.6V, V

3V, V

FSX

= 0.3V,

-20

-70

-20

-70

20

70

20

70

nA

FSX(OFF)

FSX(ON)

COMx

= 3V, 0.3V

ON Leakage Current, I

V+ = 3.6V, IN = 0V, EN = 3.6V, V

V

= 0.3V, 3V,

COMx

= 0.3V, 3V

FSX

4.7

NO Switches (HSD1, HSD2)

Analog Signal Voltage Range,

V

= 3.3V, IN = 3.3V, EN = 3.3V

= 3.3V, IN = 1.4V, EN = 1.4V, I

Full

0

-

V

DD

V

ANALOG

ON-Resistance, r

V

= 1mA,

+25

Full

+25

Full

+25

Full

-

25

29

30

35

6

Ω

ON

DD

COMx

or V

= 3.3V (See Figure 3)

HSD2

HSD1

ON-Resistance, r

V

= 3.3V, IN = 1.4V, EN = 1.4V, I

= 40mA,

4.5

5.1

0.2

0.7

DD

COMx

or V

= 0V to 400mV (See Figure 3)

HSD1

HSD2

9

r

Matching Between Channels, Δr

V = 3.3V, IN = 1.4V, EN = 1.4V, I

ON DD COMx

= 40mA,

1.3

1.5

ON

V

or V

= Voltage at max r , Voltage at max

HSD2

over signal range of 0V to 400mV (Note 7)

HSD1 ON

r

ON

FN6711.1

May 29, 2008

3

ISL76120

Electrical Specifications - 2.7V to 3.6V Supply Test Conditions: V = +3.3V, GND = 0V, V

= 1.4V, V

INL

= 0.5V, V = 1.4V,

ENH

DD

INH

V

= 0.5V, (Note 4)Parameters with MIN and/or MAX limits are 100% tested at

ENL

+25°C, unless otherwise specified. Temperature limits established by characteriza-

tion and are not production tested. (Continued)

TEMP

(°C)

MIN

(Note 5)

MAX

(Note 5) UNITS

PARAMETER

Flatness, r

TEST CONDITIONS

TYP

0.4

0.43

0.3

1

r

V

= 3.3V, IN = 1.4V, EN = 1.4V, I

= 40mA,

+25

Full

+25

Full

+25

Full

-

1

Ω

ON

FLAT(ON)

DD

COMx

= 0V to 400mV, (Note 6)

HSD1

or V

HSD2

-

1.5

20

70

20

70

Ω

OFF Leakage Current, I

or

V

= 3.6V, IN = 0V, EN = 0 and 3.6V, V

or

= 0.3V, 3V

-20

-70

-20

-70

nA

HSD2(OFF)

DD

COMD1

I

= 3V, 0.3V, V or V

HSD2 HSD1

HSD1(OFF)

COMD2

ON Leakage Current, I

or

V

= 3.6V, IN = 3.6V, EN = 3.6V, V

or

= 0.3V, 3.0V

4.8

5

HSD2(ON)

DD

COMD1

I

= 0.3V, 3.0V, V or V

HSD2 HSD1

HSD1(ON)

COMD2

DYNAMIC CHARACTERISTICS

Turn-ON Time, t

V

= 3.3V, R = 45Ω, C = 10pF, (See Figure 1)

+25

-

25

15

7

-

ns

ps

ON

Turn-OFF Time, t

DD

L

= 3.3V, R = 45Ω, C = 10pF, (See Figure 1)

OFF

Break-Before-Make Time Delay, t

L

= 3.3V, R = 45Ω, C = 10pF, (See Figure 2)

D

L

Skew, t

= 3.3V, IN = 3.3V, EN = 3.3V, R = 45Ω, C = 10pF,

50

SKEW

(HSx Switch)

L

t

= t = 720ps at 480Mbps, (Duty Cycle = 50%)

R

F

(See Figure 7)

Total Jitter, t

(HSx Switch)

V

=3.3V, IN = 3.3V, EN = 3.3V, R = 45Ω, C = 10pF,

+25

-

210

250

0.15

-

ps

ns

J

DD

t = t = 720ps at 480Mbps

R

L

F

Propagation Delay, t

(HSx Switch)

V

= 3.3V, IN = 3.3V, EN = 3.3V, R = 45Ω, C = 10pF,

L L

PD

DD

(See Figure 7)

Skew, t

V

= 3.3V, IN = 0V, EN = 3.3V, R = 39Ω, C = 50pF,

L L

SKEW

(FSx Switch)

DD

= t = 12ns at 12Mbps, (Duty Cycle = 50%)

t

R

F

(See Figure 7)

Rise/Fall Time Mismatch, t

(FSx Switch)

V

= 3.3V, IN = 0V, EN = 3.3V, R = 39Ω, C = 50pF,

+25

-

10

1.6

0.9

-

%

ns

M

DD

t = t = 12ns at 12Mbps, (Duty Cycle = 50%)

R

L

F

Total Jitter, t

V

= 3.3V, IN = 0V, EN = 3.3V, R = 39Ω, C = 50pF,

L L

J

DD

t = t = 12ns at 12Mbps

R

(FSx Switch)

F

Propagation Delay, t

(FSx Switch)

V

= 3.3V, IN = 0V, EN = 3.3V, R = 39Ω, C = 50pF,

L L

PD

DD

(See Figure 7)

Crosstalk

V

= 3.3V, R = 45Ω, f = 1MHz (See Figure 6)

+25

-

-70

-98

550

880

6

-

dB

DD

L

Off Isolation

V

= 3.3V, R = 45Ω, f = 100kHz

L

FSx Switch -3dB Bandwidth

HSx Switch -3dB Bandwidth

Signal = -10dBm, 1.0VDC offset, R = 45Ω, C = 5pF

MHz

pF

L

Signal = -10dBm, 0.2VDC offset, R = 45Ω, C = 5pF

L

HSx OFF Capacitance, C

FSx OFF Capacitance, C

COM ON Capacitance, C

f = 1MHz, V

V

= 3.3V, IN = 0V, EN = 3.3V, V

or

HSxOFF

DD

HSD1

= V

= 0V, (See Figure 5)

HSD2

COMx

f = 1MHz, V

V

= 3.3V, IN = 3.3V, EN = 3.3V, V

or

+25

-

9

-

pF

FSxOFF

DD

FSD1

= V

= 0V, (See Figure 5)

FSD2

COMx

f = 1MHz, V

V

= 3.3V, IN = 3.3V, EN = 3.3V, V

or

12

15

COMX(ON)

DD

HSD1

= V

= 0V, (See Figure 5)

HSD2

COMx

f = 1MHz, V

= 3.3V, IN = 0V, EN = 3.3V, V

or

DD

FSD1

V

= V

= 0V, (See Figure 5)

FSD2

COMx

POWER SUPPLY CHARACTERISTICS

Power Supply Range, V

Full

+25

Full

2.7

-

5.5

60

V

DD

Positive Supply Current, I

V

= 3.6V, IN = 0V or 3.6V, EN = 0V or 3.6V

DD

-

20

114

nA

DD

250

FN6711.1

May 29, 2008

4

ISL76120

Electrical Specifications - 2.7V to 3.6V Supply Test Conditions: V = +3.3V, GND = 0V, V

= 1.4V, V

= 0.5V, V

= 1.4V,

ENH

DD

INH

INL

V

= 0.5V, (Note 4)Parameters with MIN and/or MAX limits are 100% tested at

ENL

+25°C, unless otherwise specified. Temperature limits established by characteriza-

tion and are not production tested. (Continued)

TEMP

(°C)

MIN

(Note 5)

MAX

(Note 5) UNITS

PARAMETER

TEST CONDITIONS

TYP

DIGITAL INPUT CHARACTERISTICS

Input Voltage Low, V , V

INL ENL

V

= 2.7V to 3.6V

+25

Full

-

0.5

V

DD

Input Voltage High, V , V

= 2.7V to 3.6V

1.4

-

V

INH ENH

Input Current, I , I

INL ENL

= 3.6V, IN = 0V, EN = 0V

= 3.6V, IN = 3.6V

= 3.6V, EN = 3.6V

-

10

1

nA

μA

Input Current, I

NOTES:

INH

ENH

4. V

= Input voltage to perform proper function.

LOGIC

5. The algebraic convention, whereby the most negative value is a minimum and the most positive a maximum, is used in this datasheet.

6. Flatness is defined as the difference between maximum and minimum value of on-resistance over the specified analog signal voltage range.

7. r matching between channels is calculated by subtracting the channel with the highest max r value from the channel with lowest max r

ON

value, between HSD2 and HSD1 or between FSD2 and FSD1.

Test Circuits and Waveforms

V

DD

VIN

t < 20ns

r

t < 20ns

f

H

LOGIC

INPUT

50%

VIN

L

EN

V

INPUT

V

t

OUT

OFF

HSx or FSx

SWITCH

INPUT

COMx

SWITCH

INPUT

V

INPUT

IN

V

OUT

90%

C

L

10pF

R

45Ω

VIN

L

GND

SWITCH

OUTPUT

0V

t

ON

Repeat test for all switches. C includes fixture and stray

L

Logic input waveform is inverted for switches that have the opposite

logic sense.

capacitance.

R

L

-----------------------

V

= V

OUT

(INPUT)

R

+ r

ON

L

FIGURE 1A. MEASUREMENT POINTS

FIGURE 1B. TEST CIRCUIT

FIGURE 1. SWITCHING TIMES

FN6711.1

May 29, 2008

5

ISL76120

Test Circuits and Waveforms (Continued)

V

DD

C

VIN

H

EN

LOGIC

INPUT

FSD1 or FSD2

V

OUT

INPUT

COMx

VIN

L

HSD1 or HSD2

C

R

L

45Ω

10pF

IN

90%

SWITCH

OUTPUT

GND

VIN

V

OUT

0V

t

D

Repeat test for all switches. C includes fixture and stray

L

capacitance.

FIGURE 2B. TEST CIRCUIT

FIGURE 2A. MEASUREMENT POINTS

FIGURE 2. BREAK-BEFORE-MAKE TIME

V

DD

V

DD

C

r

= V /I

COMx

ON

1

r

= V /40mA

1

ON

HSx

FSx

V

HSX

V

FSX

IN

1.4V

V

IN

0.5V

1

V

1

I

COMx

40mA

COMx

EN

GND

EN

GND

1.4V

Repeat test for all switches.

FIGURE 4. FSx SWITCH r

ON

TEST CIRCUIT

FIGURE 3. HSx SWITCH r

TEST CIRCUIT

ON

FN6711.1

May 29, 2008

6

ISL76120

Test Circuits and Waveforms (Continued)

V

DD

V

DD

C

EN

SIGNAL

GENERATOR

45Ω

HSx or FSx

HSx

COMx

IN

IMPEDANCE

ANALYZER

VIN OR

VIN

L

VIN

H

COMx

GND

FSx

COMx

ANALYZER

NC

GND

R

L

Signal direction through switch is reversed, worst case values

are recorded. Repeat test for all switches.

Repeat test for all switches.

FIGURE 6. CROSSTALK TEST CIRCUIT

FIGURE 5. CAPACITANCE TEST CIRCUIT

t

ri

90%

50%

10%

90%

V

DIN+

DIN-

DD

C

t

skew_i

50%

10%

EN

VIN

t

fi

t

ro

15.8Ω

143Ω

OUT+

D2

D1

90%

COMD2

DIN+

DIN-

10%

90%

45Ω

50%

C

L

OUT+

OUT-

t

skew_o

15.8Ω

143Ω

OUT-

COMD1

50%

45Ω

C

L

10%

t

f0

GND

|t -t | Change Due to Switch for Rising Input and Rising Output

ro ri

Signals.

|t -t | Change Due to Switch for Falling Input and Falling Output

fo fi

Signals.

|t

| Skew through the Switch for Output Signals.

skew_0

| Skew through the Switch for Input Signals.

skew_i

FIGURE 7B. TEST CIRCUIT

FIGURE 7A. MEASUREMENT POINTS

FIGURE 7. SKEW TEST

FN6711.1

May 29, 2008

7

ISL76120

Application Block Diagram

3.3V

µCONTROLLER

V

DD

ISL76120

EN

IN

LOGIC CIRCUITRY

VBUS

D-

USB

4MΩ

HIGH-SPEED

TRANSCEIVER

HSD1

HSD2

COMD1

USB

D+

FSD1

FSD2

FULL-SPEED

TRANSCEIVER

COMD2

GND

PORTABLE MEDIA DEVICE

differential signals and meet the USB 2.0 full-speed signal

quality specifications. See Figure 8.

Detailed Description

The ISL76120 device is a dual single pole/double throw

(SPDT) analog switch that operates from a single DC power

supply in the range of 2.7V to 5.5V. It was designed to

function as a dual 2-to-1 multiplexer to select between a

USB high-speed transceiver and a USB full-speed

transceiver in automotive applications. It is offered in a

TDFN package for use in automotive Portable Media Player

docking stations and Apple iPod type players. The device

has an enable pin to open all switches.

The FSx switches can also pass USB high speed signals

(480Mbps) but do not quite meet the USB 2.0 high speed

signal quality eye diagram compliance requirement.

The maximum signal range for the FSx switches is from -1V

to V . The signal voltage should not be allowed to exceed

DD

the V

voltage rail or go below ground by more than -1V.

DD

When operated with a 2.7V to 3.6V supply, the FSx switches

are active (turned ON) whenever the IN logic control voltage

is ≤0.5V and the EN logic voltage ≥1.4V.

The part consists of two full speed (FSx) switches and two

high speed (HSx) switches. The FSx switches can swing

from 0V to V . They were designed to pass USB

HSx Switches (HSD1, HSD2)

DD

full speed (12Mbps) differential data signals with minimal

distortion. The HSx switches have high bandwidth and low

capacitance to pass USB high-speed (480Mbps) differential

data signals with minimal edge and phase distortion.

The two HSx switches (HSD2, HSD1) are bi-directional

switches that can pass rail-to-rail signals. The on-resistance

is low and well matched between the HSD1 and HSD2

switches over the USB high speed signal range, ensuring

minimal impact by the switches to USB high speed signal

transitions. As the signal level increases, the r_ONswitch

resistance increases.

The ISL76120 was designed for automotive USB

applications such as docking stations for Portable Media

Players and other general purpose USB connections that

have both high-speed and full-speed transceivers and need

to multiplex between these USB sources to a single USB

host (computer). A typical application block diagram of this

functionality is shown on page 8.

The HSx switches were specifically designed to pass USB

2.0 high-speed (480Mbps) differential signals typically in the

range of 0V to 400mV. They have low capacitance and high

bandwidth to pass the USB high-speed signals with

minimum edge and phase distortion to meet USB 2.0 high

speed signal quality specifications. See Figures 9 and 10.

A detailed description of the two types of switches are

provided in the following sections.

The HSx switches can also pass USB full-speed signals

(12Mbps) with minimal distortion and meet all the USB

requirements for USB 2.0 full-speed signaling. See Figure 11.

FSx Switches (FSD1, FSD2)

The two FSx switches (FSD1, FSD2) are bidirectional

switches that can pass rail-to-rail signals. They were

specifically designed to pass USB full-speed (12Mbps)

FN6711.1

May 29, 2008

8

ISL76120

The maximum signal range for the HSx switches is from -1V

Full-speed Mode

to V . The signal voltage should not be allow to exceed the

DD

voltage rail or go below ground by more than -1V.

If the IN pin = Logic “0” and the EN pin = Logic “1”, the part

will be in the full-speed mode. In this mode, the FSD1 and

FSD2 switches are ON and the HSD1 and HSD2 switches

V

DD

The HSx switches are active (turned ON) whenever the IN

voltage is ≥1.4V and the EN logic voltage ≥1.4V when

operated with a 2.7V to 3.6V supply.

are OFF (high impedance). In a typical application, V

will

DD

be in the range of 2.8V to 3.6V and will be connected to the

battery or LDO of the portable media device. When a

computer or USB hub is plugged into the common USB

connector and the part is in the full-speed mode, a link will

be established between the full-speed driver section of the

media player and the computer. The device will be able to

transmit and receive data from the computer at a data rate of

12Mbps.

ISL76120 Operation

The discussion that follows will discuss using the ISL76120 in

the typical application shown in the“Application Block

Diagram” on page 8.

POWER

The power supply connected at the V

(pin 1) provides the

DD

DC bias voltage required by the ISL76120 part for proper

operation. The ISL76120 can be operated with a V

High-speed Mode

If the IN pin = Logic “1” and the EN pin = Logic “1”, the part

will go into high-speed mode. In high-speed mode, the

HSD1 and HSD2 switches are ON and the FSD1 and FSD2

switches are OFF (high impedance). When a USB cable

from a computer or USB hub is connected at the common

USB connector and the part is in the high-speed mode, a link

will be established between the high-speed driver section of

the media player and the computer. The device will be able

to transmit and receive data from the computer at a data rate

of 480Mbps.

DD

voltage in the range of 2.7V to 5.5V. When used in a USB

application, the V voltage should be kept in the range of

DD

3.0V to 5.5V to ensure you get the proper signal levels for

good signal quality.

A 0.01µF or 0.1µF decoupling capacitor should be

connected from the V

pin to ground to filter out any power

DD

supply noise from entering the part. The capacitor should be

located as close to the V

pin as possible.

DD

LOGIC CONTROL

All Switches OFF Mode

The state of the ISL76120 device is determined by the

voltage at the IN pin (pin 2) and the EN pin (pin 10). IN is

only active when the EN pin is logic “1” (High). Refer to the

“Truth Table” on page 2.

If the IN pin = Logic “0” or Logic “1” and the EN pin = Logic “0”,

all of the switches will turn OFF (high impedance).

The all OFF state can be used to switch between the two

USB sections of the media player. When disconnecting from

one USB device to the other USB device, you can

momentarily put the ISL76120 switch in the “all off” state in

order to get the computer to disconnect from the one device

so it can properly connect to the other USB device when that

channel is turned ON.

The EN pin is internally pulled low through a 4MΩ resistor to

ground. For logic “0” (Low) it can be driven low or allowed to

Float. The IN pin must be driven low or high and cannot be

left floating.

Logic control voltage levels:

EN = Logic “0” (Low) when V

≤0.5V or Floating.

≥1.4V

EN

EN = Logic “1” (High) when V

EN

IN = Logic “0” (Low) when V ≤0.5V.

IN

IN = Logic “1” (High) when V ≥1.4V

IN

FN6711.1

May 29, 2008

9

ISL76120

Typical Performance Curves T = +25°C, Unless Otherwise Specified

A

V

= 3.3V

DD

FIGURE 8. EYE PATTERN: 12MBPS USB SIGNAL WITH FSx SWITCHES IN THE SIGNAL PATH

V

= 3.3V

DD

FIGURE 9. EYE PATTERN WITH FAR END MASK: 480MBPS USB SIGNAL WITH HSx SWITCHES IN THE SIGNAL PATH

FN6711.1

May 29, 2008

10

ISL76120

Typical Performance Curves T = +25°C, Unless Otherwise Specified (Continued)

A

V

= 3.3V

DD

FIGURE 10. EYE PATTERN WITH NEAR END MASK: 480MBPS USB SIGNAL WITH HSx SWITCHES IN THE SIGNAL PATH

V

= 3.3V

DD

FIGURE 11. EYE PATTERN: 12MBPS USB SIGNAL WITH HSx SWITCHES IN THE SIGNAL PATH

FN6711.1

May 29, 2008

11

ISL76120

Typical Performance Curves T = +25°C, Unless Otherwise Specified (Continued)

A

5.5

5.0

4.5

4.0

3.5

3.0

2.5

-10

R

= 45Ω

= 0.2V

L

-20

-30

-40

V

TO 2V

P-P P-P

IN

+105°C

+85°C

-50

+25°C

-40°C

-60

-70

-80

-90

-110

0

0.1

0.2

0.3

0.4

0.001M

0.01M

0.1M

1M

10M

100M 500M

V

(V)

COM

FREQUENCY (Hz)

FIGURE 12. HSx SWITCH ON-RESISTANCE vs SWITCH

VOLTAGE

FIGURE 13. OFF-ISOLATION

-10

R

V

= 45Ω

= 0.2V

L

TO 2V

P-P

-20

-30

-40

IN

P-P

-50

-60

-70

-80

-90

-110

0.001M

0.01M

0.1M

1M

10M

100M 500M

FREQUENCY (Hz)

FIGURE 14. CROSSTALK

Die Characteristics

SUBSTRATE POTENTIAL (POWERED UP):

GND (TDFN Paddle Connection: Tie to GND or Float)

TRANSISTOR COUNT:

98

PROCESS:

Submicron CMOS

FN6711.1

May 29, 2008

12

ISL76120

Thin Dual Flat No-Lead Plastic Package (TDFN)

L10.3x3A

2X

0.10 C

A

10 LEAD THIN DUAL FLAT NO-LEAD PLASTIC PACKAGE

A

D

MILLIMETERS

2X

0.10

C B

SYMBOL

MIN

0.70

-

NOMINAL

MAX

0.80

0.05

NOTES

A

A1

A3

b

0.75

-

0.20 REF

0.25

3.0

-

E

-

6

INDEX

AREA

0.20

2.95

2.25

2.95

1.45

0.30

3.05

2.35

3.05

1.55

5, 8

D

-

TOP VIEW

B

A

D2

E

2.30

3.0

7, 8

-

// 0.10

0.08

C

E2

e

1.50

0.50 BSC

-

7, 8

-

C

k

0.25

-

A3

C

SIDE VIEW

L

0.30

10

0.35

8

SEATING

PLANE

N

2

D2

D2/2

2

Nd

5

3

7

8

(DATUM B)

Rev. 3 3/06

NOTES:

1

6

1. Dimensioning and tolerancing conform to ASME Y14.5-1994.

2. N is the number of terminals.

INDEX

AREA

NX k

E2

3. Nd refers to the number of terminals on D.

(DATUM A)

4. All dimensions are in millimeters. Angles are in degrees.

E2/2

5. Dimension b applies to the metallized terminal and is measured

between 0.15mm and 0.30mm from the terminal tip.

NX L

6. The configuration of the pin #1 identifier is optional, but must be

located within the zone indicated. The pin #1 identifier may be

either a mold or mark feature.

N

N-1

NX b

5

8

e

7. Dimensions D2 and E2 are for the exposed pads which provide

improved electrical and thermal performance.

(Nd-1)Xe

REF.

M

0.10

C A B

8. Nominal dimensions are provided to assist with PCB Land

Pattern Design efforts, see Intersil Technical Brief TB389.

BOTTOM VIEW

C

L

9. Compliant to JEDEC MO-229-WEED-3 except for D2

dimensions.

(A1)

NX (b)

L1

L

9

5

e

SECTION "C-C"

TERMINAL TIP

FOR ODD TERMINAL/SIDE

C C

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

FN6711.1

May 29, 2008

13


型号：	ISL76120
厂家：	Intersil
描述：	Automotive Grade USB 2.0 High/Full Speed Multiplexer 汽车级USB 2.0高速/全速多路复用器复用器
文件：	总13页 (文件大小：1081K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

ISL76120 [INTERSIL]

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