ISL54209IRTZ-T_技术文档

ISL54209

®

Data Sheet

December 20, 2007

FN6627.0

MP3/USB 2.0 High Speed Switch with

Negative Signal Handling and Low Power

Shutdown

Features

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

Signaling Capability per USB 2.0

The Intersil ISL54209 dual SPDT (Single Pole/Double Throw)

switch combines low distortion audio and accurate USB 2.0

high speed data (480Mbps) signal switching in the same low

voltage device. When operated with a 2.5V to 5.0V single

supply, this analog switch allows audio signal swings below

ground, allowing the use of a common USB and audio

headphone connector in Personal Media Players and other

portable battery powered devices.

• Low Distortion Negative Signal Capability

• Low Power Shutdown State

• Low Distortion Headphone Audio Signals

- THD+N at 20mW into 32Ω Load . . . . . . . . . . . . <0.07%

• Crosstalk (100kHz) . . . . . . . . . . . . . . . . . . . . . . . . . -95dB

• OFF Isolation (100kHz) . . . . . . . . . . . . . . . . . . . . . . 95dB

• Single Supply Operation (V ) . . . . . . . . . . . . 2.5V to 5.0V

DD

The ISL54209 logic control pins are 1.8V compatible, which

allows for control via a standard µcontroller. With a VDD

voltage in the range of 2.5V to 3.6V, the IN pin voltage can

• -3dB Bandwidth USB Switch. . . . . . . . . . . . . . . . . 736MHz

• Available in µTQFN and TDFN Packages

exceed the VDD rail allowing the USB 5V V

voltage from

BUS

a computer to directly drive the IN pin to switch between the

audio and USB signal sources in the portable device. The

part has an audio enable control pin to open all the switches

and put the part in a low power state.

• Compliant with USB 2.0 Short Circuit Requirements

Without Additional External Components

• Pb-Free (RoHS Compliant)

Applications

The ISL54209 is available in a small 10 Ld 2.1mmx1.6mm

ultra-thin µTQFN package and a 10 Ld 3mmx3mm TDFN

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

+85°C.

• MP3 and other Personal Media Players

• Cellular/Mobile Phones

• PDAs

Related Literature

• Technical Brief TB363 “Guidelines for Handling and

Processing Moisture Sensitive Surface Mount Devices

(SMDs)”

• Audio/USB Switching

Application Block Diagram

3.3V

VDD

ISL54209

IN

CTRL

µCONTROLLER

LOGIC CONTROL

V

BUS

4MΩ

D-

COM -

COM +

USB

HIGH-SPEED

D+

TRANSCEIVER

L

AUDIO

CODEC

R

50kΩ

GND

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.

ISL54209

Pinouts (Note 1)

ISL54209

(10Ld 3.0mmx3.0mm TDFN)

TOP VIEW

(10 Ld 2.1mmx1.6mm μTQFN)

TOP VIEW

10

4M

Ω

CTRL

D-

10

VDD

IN

1

4M

Ω

LOGIC

CONTROL

LOGIC

CONTROL

VDD

IN

D-

9

8

9

1

2

3

4

2

4MΩ

D+

COM -

COM +

3

4

5

8

7

6

4M

Ω

COM -

L

7

6

L

50k

Ω

50k

Ω

R

GND

R

COM +

50k

Ω

50k

5

NOTE:

1. ISL54209 Switches Shown for IN = Logic “0” and CTRL = Logic “1”.

Truth Table

Ordering Information

ISL54209

TEMP.

PART

NUMBER

PART

MARKING

RANGE

(°C)

PKG.

DWG. #

IN

0

CTRL

L, R

OFF

ON

D+, D-

OFF

ON

PACKAGE

0

1

X

ISL54209IRUZ-T GF

(Notes 2, 3)

-40 to +85 10 Ld µTQFN L10.2.1x1.6A

-40 to +85 10 Ld TDFN L10.3x3A

0

1

OFF

ISL54209IRTZ-T 4209

(Notes 2, 3)

IN, CTRL: Logic “0” when ≤ 0.5V or Floating, Logic “1” when ≥ 1.4V

with 2.7V to 3.6V Supply.

ISL54209IRTZ

(Note 2)

4209

Pin Descriptions

NOTES:

2. 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.

NUMBER

NAME

VDD

IN

FUNCTION

1

2

Power Supply

Digital Control Input

3

COM-

COM+

GND

R

Voice and Data Common Pin

Ground Connection

3. Please refer to TB347 for details on reel specifications.

4

5

6

Audio Right Input

7

L

Audio Left Input

8

D+

USB Differential Input

Digital Control Input (Audio Enable)

9

D-

10

CTRL

FN6627.0

December 20, 2007

2

ISL54209

Absolute Maximum Ratings

Thermal Information

V

to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 5.5V

Thermal Resistance (Typical, Notes 5 and 6)θ (°C/W)

JA

θ

(°C/W)

DD

JC

Input Voltages

10 Ld 2.1mmx1.6mm µTQFN Package

10 Ld 3mmx3mm TDFN . . . . . . . . . . .

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

154

89

48.3

25

D+, D-, L, R (Note 4) . . . . . . . . . . . . . . . . . . . . . . . . . - 2V to 5.5V

L, R (Note 4) . . . . . . . . . . . . . . . . . . . . . . . - 2V to ((V ) + 0.3V)

IN (Note 4). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -2V to 5.5V

CTRL (Note 4). . . . . . . . . . . . . . . . . . . . . -0.3V to ((V ) + 0.3V)

DD

Output Voltages

COM-, COM+ (Note 4) . . . . . . . . . . . . . . . . . . . . . . . . -2V to 5.5V

Continuous Current (Audio Switches). . . . . . . . . . . . . . . . . ±150mA

Peak Current (Audio Switches)

(Pulsed 1ms, 10% Duty Cycle, Max). . . . . . . . . . . . . . . . ±300mA

Continuous Current (USB Switches). . . . . . . . . . . . . . . . . . . ±40mA

Peak Current (USB Switches)

Operating Conditions

Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . -40°C to +85°C

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

ESD Ratings

Human Body Model. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . >2kV

Machine Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . >200V

Charged Device Model . . . . . . . . . . . . . . . . . . . . . . . . . . . .>1.5kV

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:

4. Signals on D+, D-, L, R, COM-, COM+, CTRL and IN exceeding V

ratings.

or GND by specified amount are clamped. Limit current to maximum current

DD

5. θ is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See

JA

Tech Brief TB379.

6. For θ , the “case temp” location is the center of the exposed metal pad on the package underside.

JC

Electrical Specifications - 2.7V to 3.6V Supply Test Conditions: V = +3.0V, GND = 0V, V

= V

= 1.4V, V

INL

= V = 0.5V,

CTRLL

DD

INH

CTRLH

(Note 7), Unless Otherwise Specified.

TEMP

(°C)

MIN

MAX

PARAMETER

TEST CONDITIONS

(Notes 8, 9) TYP (Notes 8, 9) UNITS

ANALOG SWITCH CHARACTERISTICS

Audio Switches (L, R)

Analog Signal Range, V

V

= 3.3V, IN = 0.5V, CTRL = 1.4V

Full

25

-1.5

-

1.5

-

V

ANALOG DD

ON-Resistance, r

V

= 5.0V, IN = 0V, CTRL = V , I

= 40mA, V or

2.3

Ω

ON

DD

DD COMx

L

= -0.85V to 0.85V (see Figure 3)

R

V

= 4.2V, IN = 0V, CTRL = V , I

DD COMx

= -0.85V to 0.85V (see Figure 3)

= 40mA, V or

25

-

2.35

2.72

-

Ω

DD

L

R

V

= 2.85V, IN = 0V, CTRL = V , I = 40mA, V or

DD COMx L

= -0.85V to 0.85V (see Figure 3)

DD

R

V

= 3.0V, IN = 0.5V, CTRL = 1.4V , I

COMx

= -0.85V to 0.85V (see Figure 3, Note 11)

= 40mA, V or

+25

Full

+25

Full

-

2.5

2.8

3.4

Ω

DD

L

R

-

0.09

-

r

Matching Between

V

= 3.0V, IN = 0.5V, CTRL = 1.4V , I

COMx

= 40mA, V or

0.25

0.26

ON

Channels, Δr

DD

L

= Voltage at max r over signal range of -0.85V to 0.85V

ON

R

ON

(Notes 11 and 12)

r

Flatness, r

V

= 3.0V, IN = 0.5V, CTRL = 1.4V , I

COMx

= -0.85V to 0.85V (Notes 10 and 11)

= 40mA, V or

+25

Full

+25

-

0.02

-

0.05

0.07

-

Ω

ON

FLAT(ON)

DD

L

R

Discharge Pull-Down

Resistance, R , R

V

= 3.6V, IN = 0V, CTRL = 1.4V , V

COM-

or V

COM+

= -0.85V,

50

kΩ

DD

0.85V, V or V = -0.85V, 0.85V, V and V = floating; measure

L

R

L

R

D+ D-

current through the discharge pull-down resistor and calculate

resistance value.

FN6627.0

December 20, 2007

3

ISL54209

Electrical Specifications - 2.7V to 3.6V Supply Test Conditions: V = +3.0V, GND = 0V, V

= V

= 1.4V, V

INL

= V = 0.5V,

CTRLL

DD

INH

CTRLH

(Note 7), Unless Otherwise Specified. (Continued)

TEMP

MIN

MAX

PARAMETER

TEST CONDITIONS

(°C)

(Notes 8, 9) TYP (Notes 8, 9) UNITS

USB Switches (D+, D-)

Analog Signal Range, V

V

= 2.7V to 3.6V, IN = 1.4V, CTRL = 1.4V

Full

+25

0

-

V

ANALOG DD

DD

-

ON-Resistance, r

V

= 5.0V, IN = V , CTRL = V , I

DD DD DD COMx

= 5V (see Figure 4)

= 1mA, V or

D+

20

Ω

ON

D-

V

= 4.2V, IN = V , CTRL = V , I

DD DD COMx

= 4.2V (see Figure 4)

= 1mA, V or

D+

25

-

22

28

-

Ω

DD

D-

V

= 2.85V, IN = V , CTRL = V , I

DD DD COMx

= 2.85V (see Figure 4)

= 1mA, V or

D+

DD

D-

V

= 3.3V, IN = 1.4V, CTRL = 1.4V, I

= 1mA, V or

D+

25

Full

25

-

25

30

35

Ω

DD

COMx

= 3.3V (see Figure 4, Note 11)

D-

-

ON-Resistance, r

V

= 3.3V, IN = 1.4V, CTRL = 1.4V, I

= 40mA, V or

D+

5

6.5

7

Ω

ON

DD

COMx

= 0V to 400mV (see Figure 4, Note 11)

D-

Full

25

-

Ω

r

Matching Between

V

= 3.3V, IN = 1.4V, CTRL = 1.4V, I

= 40mA, V or

D+

-

0.05

0.25

0.55

1.0

5

Ω

ON

Channels, Δr

DD

COMx

= Voltage at max r (Notes 11 and 12)

ON

D-

ON

Full

25

-

Ω

r

Flatness, r

FLAT(ON)

V

= 3.3V, IN = 1.4V, CTRL = 1.4V, I

COMx

= 0V to 400mV (Notes 10 and 11)

= 40mA, V or

D+

-

0.45

Ω

ON

DD

D-

Full

25

-

0.5

-

Ω

OFF-Leakage Current,

or I

V

= 3.6V, IN = 0V, CTRL = 3.6V, V

COM-

or V

COM+

= 0.5V, 0V,

-5

-60

-10

-70

nA

DD

D+

I

or V = 0V, 0.5V, V and V = float

D+(OFF)

D-(OFF)

D-

L

R

Full

25

60

ON-Leakage Current, I

V

= 3.6V, IN = V , CTRL = 0V or V , V or V = 2.7V,

DD DD D+ D-

2

10

DX

DD

or V

= Float, V and V = float

COM-

COM+

L R

Full

-

70

DYNAMIC CHARACTERISTICS

USB Turn-ON Time, t

V

= 3.0V, R = 50Ω, C = 10pF (see Figure 1)

25

-

52

20

2.5

50

44

-

ns

μs

ns

ON

DD

L

USB Turn-OFF Time, t

Audio Turn-ON Time, t

= 3.0V, R = 50Ω, C = 10pF (see Figure 1)

L L

OFF

ON

= 3.0V, R = 50Ω, C = 10pF (see Figure 1)

L

Audio Turn-OFF Time, t

= 3.0V, R = 50Ω, C = 10pF (see Figure 1)

L L

OFF

Break-Before-Make Time Delay, V

= 3.0V, R = 50Ω, C = 10pF (see Figure 2)

L L

t

D

Skew, t

V

C

= 3.0V, IN = 3V, CTRL = 3V, R = 45Ω,

25

-

50

-

ps

SKEW

DD

L

= 10pF, t = t = 720ps at 480Mbps, (Duty Cycle = 50%)

L

R

F

(see Figure 7)

Total Jitter, t

V

C

=3.0V, IN = 3V, CTRL = 3V, R = 50Ω,

25

-

210

250

-110

-95

-

ps

J

DD

L

= 10pF, t = t = 750ps at 480Mbps

L

R F

Propagation Delay, t

V

= 3.0V, IN = 3V, CTRL = 3V, R = 45Ω, C = 10pF

DD L L

PD

(see Figure 7)

Audio Crosstalk

R to COM-, L to COM+

V

= 3.0V, IN = 0V, CTRL = 3.0V, R = 32Ω, f = 20Hz to 20kHz,

dB

DD

L

or V = 0.707V

(2V ) (see Figure 6)

R

L

RMS

P-P

Crosstalk

V

= 3.0V, R = 50Ω, f = 100kHz (see Figure 6)

DD

L

(Audio to USB, USB to Audio)

OFF-Isolation

V

= 3.0V, R = 50Ω, f = 100kHz

25

-

95

-

dB

%

DD

L

OFF-Isolation

= 3.0V, R = 32Ω, f = 20Hz to 20kHz

114

0.06

L

Total Harmonic Distortion

f = 20Hz to 20kHz, V

= 3.0V, IN = 0V, CTRL = 3.0V,

DD

V or V = 0.707V

(2V

), R = 32 Ω

P-P

L

R

RMS

L

USB Switch -3dB Bandwidth

D+/D- OFF-Capacitance,

Signal = 0dBm, 0.2V

offset, R = 50Ω, C = 5pF

25

-

736

3

-

MHz

pF

DC

L

f = 1MHz, V = 3.0V, IN = 0V, CTRL = 3.0V, V or

DD

D-

C

V

= V

= 0V (see Figure 5)

DxOFF

D+

COMx

FN6627.0

December 20, 2007

4

ISL54209

Electrical Specifications - 2.7V to 3.6V Supply Test Conditions: V = +3.0V, GND = 0V, V

= V

= 1.4V, V

INL

= V = 0.5V,

CTRLL

DD

INH

CTRLH

(Note 7), Unless Otherwise Specified. (Continued)

TEMP

MIN

MAX

PARAMETER

TEST CONDITIONS

= 3.0V, IN = 3.0V, CTRL = 0V or 3V, V or

(°C)

(Notes 8, 9) TYP (Notes 8, 9) UNITS

L/R OFF-Capacitance, C

,

f = 1MHz, V

25

-

5

-

pF

LOFF

DD

= 0V (see Figure 5)

L

C

V = V

ROFF

R

COMx

COM ON-Capacitance,

f = 1MHz, V

= 3.0V, IN = 3.0V, CTRL = 0V or 3V, V or

D-

25

-

8

-

pF

DD

= 0V (see Figure 5)

C

V

= V

D+ COMx

COMx(ON)

POWER SUPPLY CHARACTERISTICS

Power Supply Range, V

Full

25

2.5

5.0

13

15

10

150

-

V

DD

Positive Supply Current, I

V

= 3.6V, IN = 0V or 3.6V, CTRL = 3.6V

-

7

-

µA

nA

µA

DD

Full

25

Positive Supply Current, I

(Low Power State)

V

= 3.6V, IN = 0V, CTRL = 0V or float

1

-

DD

Full

25

Power OFF-Current, I

I

V

= 0V, V = V

Dx COMx

= 5.25V, IN = CTRL = Float

7

Dx COMx DD

DIGITAL INPUT CHARACTERISTICS

Voltage Low, V , V

INL CTRLL

V

= 2.7V to 3.6V

Full

-

1.4

-50

-2

-

0.5

-

V

DD

Voltage High, V

, V

= 2.7V to 3.6V

-

INH CTRLH

Input Current, I , I

= 3.6V, IN = 0V, CTRL = 0V

20

0.9

4

50

2

nA

µA

MΩ

INL CTRLL

Input Current, I

= 3.6V, IN = 3.6, CTRL = 0V

INH

= 3.6V, IN = 0V, CTRL = 3.6V

2

CTRLH

CTRL Pull-Down Resistor,

= 3.6V, IN = 0V, CTRL = 3.6V; measure current through the

-

R

internal pull-down resistor and calculate resistance value.

CTRL

IN Pull-Down Resistor, R

V

= 3.6V, IN = 3.6V, CTRL = 3.6V; measure current through

Full

-

4

-

MΩ

IN

DD

the internal pull-down resistor and calculate resistance value.

NOTES:

7. V

= Input voltage to perform proper function.

logic

8. The algebraic convention, whereby the most negative value is a minimum and the most positive a maximum, is used in this data sheet.

9. Parts are 100% tested at +25°C. Over-temperature limits established by characterization and are not production tested.

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

11. Limits established by characterization and are not production tested.

12. r

matching between channels is calculated by subtracting the channel with the highest max r

value from the channel with lowest max r

ON ON

ON

value, between L and R or between D+ and D-.

FN6627.0

December 20, 2007

5

ISL54209

Test Circuits and Waveforms

C

V

DD

V

t < 20ns

r

t < 20ns

f

INH

LOGIC

INPUT

50%

V

CTRL

INL

V

INPUT

V

t

OUT

OFF

AUDIO OR USB

SWITCH

INPUT

COMx

SWITCH

INPUT

V

IN

INPUT

0V

V

OUT

90%

C

L

10pF

R

50Ω

V

L

GND

IN

SWITCH

OUTPUT

t

ON

Logic input waveform is inverted for switches that have the opposite

logic sense.

Repeat test for all switches. C includes fixture and stray

L

capacitance.

R

L

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

V

= V

OUT

(INPUT)

R

+ r

ON

L

FIGURE 1A. MEASUREMENT POINTS

FIGURE 1B. TEST CIRCUIT

FIGURE 1. SWITCHING TIMES

V

DD

C

CTRL

V

INH

D- OR D+

LOGIC

INPUT

V

OUT

INPUT

COMx

L OR R

IN

V

INL

C

10pF

R

50Ω

L

V

OUT

0V

90%

SWITCH

OUTPUT

GND

V

IN

t

D

Repeat test for all switches. C includes fixture and stray capacitance.

L

FIGURE 2A. MEASUREMENT POINTS

FIGURE 2B. TEST CIRCUIT

FIGURE 2. BREAK-BEFORE-MAKE TIME

V

DD

C

r

= V /40mA

r

= V /40mA

ON

1

ON

1

CTRL

D- OR D+

CTRL

L OR R

V

OR R

L

V

OR D+

D-

0V OR FLOAT

V

IN

DD

V

1

40mA

COMx

GND

Repeat test for all switches.

FIGURE 3. AUDIO r

TEST CIRCUIT

FIGURE 4. USB r

TEST CIRCUIT

ON

FN6627.0

December 20, 2007

6

ISL54209

Test Circuits and Waveforms (Continued)

V

DD

C

CTRL

L OR R

AUDIO OR USB

SIGNAL

GENERATOR

32Ω

COMx

IN

IMPEDANCE

ANALYZER

0V OR V

0V

DD

COMx

GND

R OR L

COMx

ANALYZER

NC

GND

R

L

Repeat test for all switches.

Signal direction through switch is reversed, worst case values

are recorded. Repeat test for all switches.

FIGURE 6. AUDIO CROSSTALK TEST CIRCUIT

FIGURE 5. CAPACITANCE TEST CIRCUIT

V

DD

C

t

ri

CTRL

IN

90%

50%

V

DD

10%

90%

DIN+

DIN-

OUT+

15.8Ω

D+

D-

COM+

COM-

t

skew_i

DIN+

DIN-

45Ω

143Ω

C

L

50%

10%

15.8Ω

OUT-

45Ω

t

C

fi

t

143Ω

L

ro

90%

GND

10%

90%

50%

10%

OUT+

OUT-

|tro - tri| Delay Due to Switch for Rising Input and Rising Output Signals.

|tfo - tfi| Delay Due to Switch for Falling Input and Falling Output Signals.

|tskew_0| Change in Skew through the Switch for Output Signals.

t

skew_o

t

f0

|tskew_i| Change in Skew through the Switch for Input Signals.

FIGURE 7A. MEASUREMENT POINTS

FIGURE 7B. TEST CIRCUIT

FIGURE 7. SKEW TEST

FN6627.0

December 20, 2007

7

ISL54209

Application Block Diagrams

3.3V

VDD

ISL54209

IN

CTRL

4MΩ

µCONTROLLER

LOGIC CONTROL

V

BUS

4MΩ

D-

COM -

COM +

USB

HIGH-SPEED

TRANSCEIVER

D+

L

AUDIO

CODEC

R

50kΩ

GND

FIGURE 8. LOGIC CONTROL VIA MICRO-PROCESSOR

3.3V

VDD

ISL54209

IN

CTRL

4MΩ

μCONTROLLER

LOGIC CONTROL

V

BUS

4MΩ

D-

COM -

COM +

USB

HIGH-SPEED

TRANSCEIVER

D+

L

AUDIO

CODEC

R

50kΩ

GND

FIGURE 9. LOGIC CONTROL VIA V

BUS

VOLTAGE FROM COMPUTER OR USB HUB

The part consists of two 2.5Ω audio switches and two 5Ω

USB switches. The audio switches can accept signals that

swing below ground. They were designed to pass audio left

and right stereo signals, that are ground referenced, with

minimal distortion. The USB switches were designed to pass

high-speed USB differential data signals with minimal edge

and phase distortion.

Detailed Description

The ISL54209 device is a dual single pole/double throw

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

supply in the range of 2.5V to 5.0V. It was designed to

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

differential data signals and audio L and R stereo signals. It

comes in tiny µTQFN and TDFN packages for use in MP3

players, PDAs, cellular phones and other personal media

players.

The ISL54209 was specifically designed for MP3 players,

personal media players and cellular phone applications that

need to combine the audio headphone jack and the USB

FN6627.0

December 20, 2007

8

ISL54209

data connector into a single shared connector, thereby

saving space and component cost. Typical Application Block

Diagrams of this functionality are shown in Figures 8 and 9.

The USB 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 13

for Full-speed Eye Pattern taken with switch in the signal path.

The ISL54209 has a single logic control pin (IN) that selects

between the audio switches and the USB switches. This pin

can be driven Low or High to switch between the audio

CODEC drivers and USB transceiver of the MP3 player or

cellular phone. The ISL54209 also contains a logic control

pin (CTRL) that when driven Low while IN is Low, opens all

switches and puts the part into a low power state, drawing

The maximum signal range for the USB switches is from

-1.5V to V . The signal voltage at D- and D+ should not be

DD

allow to exceed the V

more than -1.5V.

voltage rail or go below ground by

DD

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

voltage is ≥ to 1.4V.

typically 1nA of I

DD

current.

ISL54209 Operation

A detailed description of the two types of switches are

provided in the following sections.

The following will discuss using the ISL54209 in the Typical

Application Block Diagrams shown in Figures 8 and 9.

Audio Switches

VDD SUPPLY

The two audio switches (L, R) are 2.5Ω switches that can

pass signals that swing below ground by as much as 1.5V.

They were designed to pass ground reference stereo signals

with minimal insertion loss and very low distortion over a ±1V

signal range.

The DC power supply connected at VDD (pin 1) provides the

required bias voltage for proper switch operation. The part

can operate with a supply voltage in the range of 2.5V to

5.0V.

In a typical USB/Audio application for portable battery

Crosstalk between the audio channels is -110dB over the

audio band. Crosstalk between the audio channel and USB

channel is -95dB at 100kHz. These switches have excellent

off-isolation, 114dB, over the audio band with a 32Ω load.

powered devices, the V

voltage will come from a battery

DD

or an LDO and be in the range of 2.7V to 3.6V. For best

possible USB full-speed operation (12Mbps), it is

recommended that the V

voltage be ≥2.5V in order to get

DD

Over a signal range of ±1V (0.707V

these switches have an extremely low r

ON

) with VDD > 2.7V,

resistance

RMS

a USB data signal level above 2.5V.

LOGIC CONTROL

variation. They can pass ground referenced audio signals with

very low distortion (<0.06% THD+N) when delivering 15.6mW

into a 32Ω headphone speaker load. See Figures 10 and 11.

The state of the ISL54209 device is determined by the

voltage at the IN pin (pin 2) and the CTRL pin (pin 10).

These logic pins are 1.8V logic compatible when V

is in

DD

the range of 2.7V to 3.6V and can be controlled by a

These switches are bi-directional switches. In typical

applications, the audio drivers would be connected at the L

and R side of the switch (pins 7 and 8) and the speaker

loads would be connected at the COM side of the switch

(pins 3 and 4).

standard µprocessor. The part has three states or modes of

operation. The Audio Mode, USB Mode and the Low Power

Mode. Refer to the “Truth Table” on page 2.

The IN and CTRL pins are internally pulled low through a 4MΩ

resistor to ground and can be left floating or tri-stated by the

µprocessor. The CTRL control pin is only active when IN is logic

“0”.

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

voltage is ≤ 0.5V or floating and the CTRL voltage ≥ to 1.4V.

USB Switches

The two USB switches (D+, D-) are bidirectional switches

that can pass rail-to-rail signals. When powered with a 3.3V

The voltage at the IN pin can exceed the V

voltage by as

DD

much as 2.55V when VDD ≤ 3.6V. This allows the V

BUS

supply, these switches have a nominal r

of 5Ω over the

ON

flatness of 0.45Ω.

voltage from a computer or USB hub (4.4V to 5.25V) to drive

the IN pin while the VDD voltage is in the range of 2.5V to

signal range of 0V to 400mV with a r

ON

matching between the D+ and D- switches over this

The r

ON

3.6V. See “USING THE COMPUTER V

DRIVE THE “IN” PIN” page 10

VOLTAGE TO

BUS

signal range is only 0.05Ω ensuring minimal impact by the

switches to USB high speed signal transitions. As the signal

Logic control voltage levels:

level increases, the r

resistance increases. At signal level

ON

of 3.3V, the switch resistance is nominally 25Ω.

IN = Logic “0” (Low) when V ≤ 0.5V or Floating.

IN

IN = Logic “1” (High) when V ≥ 1.4V

CTRL = Logic “0” (Low) when ≤ 0.5V or Floating.

CTRL = Logic “1” (High) when ≥ 1.4V

IN

The USB 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 Figure 12.

Audio Mode

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

will be in the Audio mode. In Audio mode, the L (left) and R

FN6627.0

December 20, 2007

9

ISL54209

(right) 2.5Ω audio switches are ON and the D- and D+ 5Ω

In Low Power mode, the off-isolation and crosstalk between

switches are OFF (high impedance).

switch cells is minimal for negative swinging signals. Care

should be taken to avoid negative swinging signals in this

mode of operation. In typical applications, the Low Power

state will be applied to the ISL54209 part when the portable

media player is in its sleep or hibernate mode to conserve

battery power. In the sleep mode, no audio or USB signals

are applied to the part.

When nothing is plugged into the common connector or a

headphone is plugged into the common connector, the

µprocessor will sense that there is no voltage at the V

pin of the connector and will drive and hold the IN control pin

of the ISL54209 low. As long as the CTRL = Logic “1,” the

ISL54209 part will be in the audio mode and the audio

drivers of the media player can drive the headphones and

play music.

BUS

USING THE COMPUTER V

“IN” PIN

VOLTAGE TO DRIVE THE

BUS

USB Mode

External IN Pull-Down Resistor

Rather than using a micro-processor to control the IN logic

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

“1”, the part will go into USB mode. In USB mode, the D- and

D+ 5Ω switches are ON and the L and R 2.5Ω audio

switches are OFF (high impedance).

pin, one can directly drive the IN pin using the V

from the computer or USB hub.

voltage

BUS

When a headphone or nothing is connected at the common

connector, the internal 4Ω pull-down will pull the IN pin low

putting the ISL54209 in the Audio mode or Low Power

mode, depending on the condition of the CTRL pin.

When a USB cable from a computer or USB hub is

connected at the common connector, the µprocessor will

sense the presence of the 5V V

and drive the IN pin

BUS

voltage high. The ISL54209 part will go into the USB mode.

In USB mode, the computer or USB hub transceiver and the

MP3 player or cell phone USB transceiver are connected

and digital data will be able to be transmitted back and forth.

When a USB cable is connected at the common connector,

the voltage at the IN pin will be driven to 5V and the part will

automatically go into the USB mode.

When the USB cable is disconnected from the common

connector, the voltage at the IN pin will be pulled low by the

pull-down resistor and return to the Audio Mode or Low

Power Mode, depending on the condition of the CTRL pin.

When the USB cable is disconnected, the µprocessor will

sense that the 5V VBUS voltage is no longer connected and

will drive the IN pin low and put the part back into the Audio

or Low Power Mode.

Note: The voltage at the IN pin can exceed the VDD voltage

by as much as 2.55V when VDD ≤ 3.6V. This allows the

VBUS voltage from a computer or USB hub (4.4V to 5.25V)

Low Power Mode

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

will be in the Low Power mode. In the Low Power mode, the

audio switches and the USB switches are OFF (high

impedance). In this state, the device draws typically 1nA of

current.

to drive the IN pin while the V

2.5V to 3.6V.

voltage is in the range of

DD

FN6627.0

December 20, 2007

10

ISL54209

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

A

0.11

0.10

R

V

= 32Ω

= 0.707V

R

= 32Ω

LOAD

V = 3V

DD

RMS

0.10

0.09

0.08

0.07

0.06

0.05

0.04

3V

P-P

0.08

2.5V

P-P

0.06

0.04

2V

P-P

V

= 2.6V

DD

V

= 3.6V

DD

1V

P-P

V

= 2.7V

V

= 3V

DD

0.02

20

200

2000

20000

20

200

2000

20000

FREQUENCY (Hz)

FIGURE 10. THD+N vs SUPPLY VOLTAGE vs FREQUENCY

FIGURE 11. THD+N vs SIGNAL LEVELS vs FREQUENCY

TIME SCALE (0.2ns/DIV)

FIGURE 12. EYE PATTERN: 480Mbps WITH USB SWITCHES IN THE SIGNAL PATH

FN6627.0

December 20, 2007

11

ISL54209

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

A

V

= 3.3V

DD

TIME SCALE (10ns/DIV)

FIGURE 13. EYE PATTERN: 12Mbps USB SIGNAL WITH USB SWITCHES IN THE SIGNAL PATH

1

0

USB SWITCH

R

= 50Ω

L

V

= 0.2V

TO 2V

DC

SIGNAL

P-P

= 1.5V

P-P

-20

-40

-60

V

DCOFFSET

-1

-2

-3

-4

-80

-100

-120

R

= 50Ω

L

V

= 0.2V

TO 2V

P-P P-P

SIGNAL

0.001M

0.01M

0.1M

1M

10M

100M 500M

1M

10M

100M

1G

FREQUENCY (Hz)

FIGURE 15. OFF-ISOLATION USB SWITCHES

FIGURE 14. FREQUENCY RESPONSE

FN6627.0

December 20, 2007

12

ISL54209

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

A

0

R

= 50Ω

L

V

= 0.2V

TO 2V

P-P P-P

SIGNAL

-20

-40

Die Characteristics

SUBSTRATE POTENTIAL (POWERED UP):

GND

-60

TRANSISTOR COUNT:

98

-80

-100

-120

PROCESS:

Submicron CMOS

0.001M

0.01M

0.1M

1M

10M

100M 500M

FREQUENCY (Hz)

FIGURE 16. OFF-ISOLATION AUDIO SWITCHES

FN6627.0

December 20, 2007

13

ISL54209

Ultra Thin Quad Flat No-Lead Plastic Package (UTQFN)

L10.2.1x1.6A

D

A

B

10 LEAD ULTRA THIN QUAD FLAT NO-LEAD PLASTIC

PACKAGE

6

MILLIMETERS

INDEX AREA

N

E

SYMBOL

MIN

0.45

NOMINAL

MAX

0.55

NOTES

2X

0.10 C

A

A1

A3

b

0.50

-

1

2

2X

0.10 C

-

0.05

-

TOP VIEW

0.127 REF

-

0.15

2.05

1.55

0.20

0.25

2.15

1.65

5

0.10 C

0.05 C

D

2.10

-

C

A

E

1.60

-

SEATING PLANE

e

0.50 BSC

-

A1

k

0.20

0.35

-

0.40

10

4

-

SIDE VIEW

L

0.45

-

(DATUM A)

N

2

PIN #1 ID

Nd

Ne

θ

3

4xk

1

2

NX L

1

3

N

0

-

12

4

(DATUM B)

Rev. 3 6/06

N-1

NOTES:

5

NX b

e

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

2. N is the number of terminals.

3. Nd and Ne refer to the number of terminals on D and E side,

respectively.

0.10 M C A B

0.05 M C

3

(ND-1) X e

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

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

between 0.15mm and 0.30mm from the terminal tip.

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.

BOTTOM VIEW

C

L

(A1)

NX (b)

L

5

7. Maximum package warpage is 0.05mm.

e

8. Maximum allowable burrs is 0.076mm in all directions.

9. Same as JEDEC MO-255UABD except:

SECTION "C-C"

TERMINAL TIP

C C

No lead-pull-back, "A" MIN dimension = 0.45 not 0.50mm

"L" MAX dimension = 0.45 not 0.42mm.

FOR ODD TERMINAL/SIDE

10. For additional information, to assist with the PCB Land Pattern

Design effort, see Intersil Technical Brief TB389.

b

2.50

1.75

0.05 MIN

L

2.00

0.80

0.275

0.10 MIN

0.25

0.50

DETAIL “A” PIN 1 ID

10

LAND PATTERN

FN6627.0

December 20, 2007

14

ISL54209

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

FN6627.0

December 20, 2007

15


型号：	ISL54209IRTZ-T
厂家：	Intersil
描述：	MP3/USB 2.0 High Speed Switch with Negative Signal Handling and Low Power Shutdown MP3 / USB 2.0高速开关，可处理负信号处理和低功耗关断模式开关光电二极管输出元件
文件：	总15页 (文件大小：729K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

ISL54209IRTZ-T [INTERSIL]

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