ISL54207_技术文档

ISL54207

®

Data Sheet

December 5, 2006

FN6403.0

Low Voltage, Dual SPDT, USB/CVBS/

Audio Switches, with Negative Signal

Capability

Features

• High Speed (480Mbps) Signaling Capability per USB 2.0

• Low Distortion Negative Signal Capability

The Intersil ISL54207 dual SPDT (Single Pole/Double Throw)

switches combine low distortion audio/video and accurate

USB 2.0 high speed (480Mbps) data signal switching in the

same low voltage device. When operated with a 2.7V to 3.6V

single supply, these analog switches allow audio/video signal

swings below-ground, allowing the use of a common USB and

audio/video connector in digital cameras, camcorders and

other portable battery powered Personal Media Player

devices.

• Detection of V

BUS

Voltage on USB Cable

• Control Pin to Open all Switches and Enter Low Power

State

• Low Distortion Mono Audio Signal

- THD+N at 20mW into 32Ω Load . . . . . . . . . . . . . <0.1%

• Low Distortion Color Video Signal

- Differential Gain . . . . . . . . . . . . . . . . . . . . . . . . . . 0.28%

- Differential Phase. . . . . . . . . . . . . . . . . . . . . . . .0.04deg

The ISL54207 incorporates circuitry for detection of the USB

V

voltage, which is used to switch between the

• Cross-talk (4MHz) . . . . . . . . . . . . . . . . . . . . . . . . . . -78dB

BUS

audio/video and USB signal sources in the portable device.

The part has a control pin to open all the switches and put the

part in a low power down state.

• Single Supply Operation (V ) . . . . . . . . . . . . 2.7V to 3.6V

DD

• -3dB Bandwidth USB Switch. . . . . . . . . . . . . . . . . 630MHz

• Available in μTQFN and TDFN Packages

The ISL54207 is available in a small 10 Ld 2.1mm x 1.6mm

ultra-thin μTQFN package and a 10Ld 3mm x 3mm TDFN

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

+85°C.

• Pb-Free Plus Anneal Available (RoHS Compliant)

• Compliant with USB 2.0 Short Circuit Requirements

Without Additional External Components

Related Literature

• Technical Brief TB363 “Guidelines for Handling and

Processing Moisture Sensitive Surface Mount Devices

(SMDs)”

Applications

• Digital Camera and Camcorders

• Video MP3 and other Personal Media Players

• Cellular/Mobile Phones

• PDA’s

• Application Note AN557 “Recommended Test Procedures

for Analog Switches”

• Audio/Video/USB Switching

Application Block Diagram

VDD

μCONTROLLER

ISL54207

VBUS

CTRL

LOGIC CIRCUITRY

USB

D-

22kΩ

4MΩ

HIGH-SPEED

NO1

D+

TRANSCEIVER

COM1

COM2

NO2

50kΩ

NC1

NC2

NTSC OR PAL

VIDEO

AUDIO

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.

ISL54207

Pinouts (Note 1)

ISL54207

(10 LD μTQFN)

TOP VIEW

ISL54207

(10 LD TDFN)

TOP VIEW

CTRL

NO1

NO2

10

VDD

10

9

1

4M

VBUS

LOGIC

2

NO1

NO2

VDD

1

9

LOGIC

CONTROL

4M

CONTROL

COM 1

3

4

5

8

7

6

VBUS

COM 1

COM 2

2

3

4

8

4M

COM 2

GND

NC1

NC2

NC1

NC2

7

6

50k

5

NOTE:

1. ISL54207 Switches shown for V

= Logic “0” and CTRL = Logic “1”.

BUS

Truth Table

Pin Descriptions

ISL54207

VBUS

CTRL

NC1, NC2

OFF

NO1, NO2

OFF

PIN NO.

NAME

VDD

FUNCTION

0

1

0

1

X

1

2

Power Supply

ON

OFF

VBUS

COM1

COM2

GND

NC2

Digital Control Input

OFF

ON

3

Voice/Video and USB Common Pin

Ground Connection

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

4

V

: Logic “0” when ≤ V

+ 0.8V

+ 0.2V or Floating, Logic “1” when

BUS

≥V

DD

5

DD

6

Audio or Video Input

7

NC1

Audio or Video Input

8

NO2

USB Differential Input

9

NO1

USB Differential Input

10

CTRL

Digital Control Input (Audio Enable)

Ordering Information

PART NUMBER

(Note)

PART

MARKING

TEMP. RANGE (°C)

-40 to +85

PACKAGE (Pb-Free)

10 Ld 2.1 x 1.6mm μTQFN Tape and Reel

10 Ld 3mm x 3mm TDFN Tape and Reel

10 Ld 3mm x 3mm TDFN

PKG. DWG. #

L10.2.1x1.6A

L10.3x3A

ISL54207IRUZ-T

ISL54207IRZ-T

ISL54207IRZ

FP

207Z

-40 to +85

L10.3x3A

NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate

or NiPdAu termination finish, which are 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.

FN6403.0

December 5, 2006

2

ISL54207

Absolute Maximum Ratings

Thermal Information

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

Input Voltages

Thermal Resistance (Typical, Note 3)

θ

(°C/W)

JA

10 Ld μTQFN Package . . . . . . . . . . . . . . . . . . . . . . .

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

130

110

NCx, NOx(Note 2) . . . . . . . . . . . . . . . . . . . - 2V to ((V ) + 0.3V)

DD

VBUS (Note 2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -2V to 5.5V

CTRL (Note 2). . . . . . . . . . . . . . . . . . . . . . -0.3 to ((V ) + 0.3V)

Output Voltages

DD

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

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

COMx (Note 2) . . . . . . . . . . . . . . . . . . . . . . -2V to ((V ) + 0.3V)

DD

Continuous Current (NCx, COMx) . . . . . . . . . . . . . . . . . . . ±150mA

Peak Current (NCx, COMx)

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

Continuous Current (NOx) . . . . . . . . . . . . . . . . . . . . . . . . . . ±40mA

Peak Current (NOx)

Operating Conditions

Temperature Range

ISL54207IRUZ and ISL54207IRZ. . . . . . . . . . . . . . . -40°C to +85°C

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

ESD Rating:

HBM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . >7kV

MM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . >450V

CDM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . >2kV

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.

NOTES:

2. Signals on NOx, NCx, COMx, CTRL, VBUS exceeding V

DD

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

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 = +3.0V, GND = 0V, V

= 3.8V, V = 3.2V,

BUSL

DD

BUSH

= 0.5V, (Notes 4, 6), unless otherwise specified.

V

= 1.4V, V

CTRLH

CTRLL

TEMP (NOTE 5)

(NOTE 5)

PARAMETER

TEST CONDITIONS

(°C)

MIN

TYP

MAX

UNITS

ANALOG SWITCH CHARACTERISTICS

Audio/Video Switches (NC1, NC2)

Analog Signal Range, V

ANALOG

V

= 3.0V, V

= float, CTRL = 1.4V

= float, CTRL = 1.4V,

Full

25

-1.5

-

2.65

-

1.5

4

V

Ω

DD

BUS

ON Resistance, r

ON

-

DD

BUS

I

= 100mA, V = -0.85V to 0.85V,

COMx

NCx

Full

5.5

(See Figure 3)

r

Matching Between Channels,

V

= 3.0V, V

= float, CTRL = 1.4V, I

= 100mA,

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

ON

25

-

0.02

-

0.13

0.16

Ω

ON

Δr

DD

BUS

COMx

ON

NCx

Full

0.85V, (Note 8)

r

Flatness, r

V

= 3.0V, V

BUS

= 100mA, V

= float, CTRL = 1.4V,

= -0.85V to 0.85V, (Note 7)

25

Full

25

-

0.03

-

0.05

0.07

-

Ω

ON

FLAT(ON)

DD

I

COMx

NCx

Discharge Pull-Down Resistance,

, R

V

= 3.6V, V

BUS

= -0.85V, 0.85V, V

= floating, Measure current through the discharge

= float, CTRL = 1.4V, V

or

50

kΩ

DD

COM-

R

= -0.85V, 0.85V,

NC1 NC2

COM+

NCx

NOx

pull-down resistor and calculate resistance value.

USB Switches (NO1, NO2)

Analog Signal Range, V

V

= 3.0V, V

= 3.6V, V

= 5.0V, CTRL = 0V or 3V

= 4.4V, CTRL = 0V or 3.6V,

= 0V to 400mV

NOx

Full

25

0

-

4.6

-

V

Ω

ANALOG

DD

BUS

DD

ON Resistance, r

ON

5

DD

BUS

I

= 40mA, V

COMx

Full

-

6.5

(See Figure 4)

r

Matching Between Channels,

V

= 3.6V, V

BUS

= 4.4V, CTRL = 0V or 3.6V,

= Voltage at max r

25

-

0.06

-

0.5

Ω

ON

ΔR

DD

I

= 40mA, V

,

ON

COMx

NOx

Full

0.55

(Note 8)

r

Flatness, r

V

= 3.6V, V

= 4.4V, CTRL = 0V or 3.6V,

= 40mA, V = 0V to 400mV, (Note 7)

NOx

25

-

0.4

-

0.6

1.0

Ω

ON

FLAT(ON)

DD

BUS

I

COMx

Full

FN6403.0

December 5, 2006

3

ISL54207

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

= 3.8V, V

= 3.2V,

BUSL

DD

BUSH

V

= 1.4V, V

= 0.5V, (Notes 4, 6), unless otherwise specified.

CTRLH

CTRLL

(Continued)

TEMP (NOTE 5)

(NOTE 5)

PARAMETER

OFF Leakage Current, I

TEST CONDITIONS

(°C)

MIN

-10

-70

-10

-75

TYP

MAX

UNITS

nA

or

V

= 3.6V, V

= 0V, CTRL = 3.6V, V = 0.5V, 0V,

COMx

25

-

10

70

10

75

D+(OFF)

DD

BUS

= 0V, 0.5V, V = float

NCx

I

D-(OFF)

NOx

Full

25

nA

ON Leakage Current, I

V

= 3.3V, V

BUS

= 5.25V, CTRL = 0V or 3.6V,

, V = float

2

-

nA

Dx

DD

= 2.0V, V

NOx

COMx NCx

Full

nA

DYNAMIC CHARACTERISTICS

Turn-ON Time, t

V

= 2.7V, R = 50Ω, C = 10pF, (See Figure 1)

25

-

67

48

18

50

-

ns

ps

ON

Turn-OFF Time, t

DD

L

= 2.7V, R = 50Ω, C = 10pF, (See Figure 1)

OFF

Break-Before-Make Time Delay, t

L

= 2.7V, R = 50Ω, C = 10pF, (See Figure 2)

D

L

Skew, t

= 3.0V, V

= 5.0V, CTRL = 0V or 3V, R = 45Ω,

SKEW

BUS L

C

= 10pF, t = t = 720ps at 480Mbps,

L

R F

(Duty Cycle = 50%) (See Figure 7)

Total Jitter, t

V

C

= 3.0V, V = 5.0V, CTRL = 0V or 3V, R = 45Ω,

25

-

210

250

-78

-

ps

dB

J

DD

BUS

L

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

L

R

F

Propagation Delay, t

V

C

= 3.0V, V

= 5.0V, CTRL = 0V or 3V, R = 45Ω,

PD

DD

BUS L

= 10pF, (See Figure 7)

L

Crosstalk (Channel-to-Channel),

NC2 to COM1, NC1 to COM2

V

= 3.0V, V

= float, CTRL = 3.0V, R = 75Ω,

L

DD

BUS

= 300mV

f = 4MHz, V

,

NCx

P-P

(See Figure 6)

Differential Gain

V

R

= 300mV , V

= 75

= 0V to 0.7V, f = 3.58MHz,

OFFSET

25

-

0.28

0.04

0.06

338

-

%

°

IN

P-P OFFSET

L

Differential Phase

V

R

= 300mVp-p, V

= 75

IN

L

Total Harmonic Distortion

f = 20Hz to 20kHz, V

DD

CTRL = 3.0V, V

= 3.0V, V

= 0.707V

= float,

(2V ), R = 32Ω

RMS P-P

%

BUS

NCx

L

NCx (Audio/Video) Switch -3dB

Bandwidth

Signal = 8dBm, R = 75Ω, C = 5pF

MHz

L

NOx (USB) Switch -3dB Bandwidth Signal = 0dBm, 0.2V

DC

offset, R = 50Ω, C = 5pF

25

-

630

6

-

MHz

pF

L

NOx OFF Capacitance, C

NCx OFF Capacitance, C

COMxONCapacitance, C

f = 1MHz, V

= 3.0V, V

= float, CTRL = 3.0V,

DD

or V = V = 0V, (See Figure 5)

COMx

NOx(OFF)

NCx(OFF)

COMx(ON)

BUS

V

D-

D+

f = 1MHz, V

= 3.0V, V

= 5.0V, CTRL = 0V or 3V,

25

-

9

-

pF

DD

V or V = V

BUS

= 0V, (See Figure 5)

L

R

COMx

= 3.0V, V

f = 1MHz, V

= 5.0V, CTRL = 0V or 3V,

10

DD

or V = V = 0V, (See Figure 5)

COMx

BUS

V

D-

POWER SUPPLY CHARACTERISTICS

Power Supply Range, V

D+

Full

25

2.7

3.6

8

V

DD

Positive Supply Current, I

V

= 3.6V, V

= float or 5.25V, CTRL = 1.4V

= 0V or float, CTRL = 0V or float

-

6

-

μA

nA

DD

BUS

Full

25

10

7

Positive Supply Current, I

(Low Power State)

V

1

-

DD

BUS

Full

140

DIGITAL INPUT CHARACTERISTICS

V

Voltage Low, V

BUSL

V

= 2.7V to 3.6V

Full

-

V + 0.2

DD

V

BUS

DD

Voltage High, V

V

+ 0.8

-

BUSH

DD

CTRL Voltage Low, V

-

0.5

CTRLL

FN6403.0

December 5, 2006

4

ISL54207

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

= 3.8V, V

= 3.2V,

BUSL

DD

BUSH

V

= 1.4V, V

= 0.5V, (Notes 4, 6), unless otherwise specified.

CTRLH

CTRLL

(Continued)

TEMP (NOTE 5)

(NOTE 5)

PARAMETER

CTRL Voltage High, V

TEST CONDITIONS

(°C)

Full

MIN

1.4

-50

-2

TYP

-

MAX

UNITS

V

= 2.7V to 3.6V

-

50

2

CTRLH

DD

Input Current, I

, I

= 3.6V, V

= 0V or float, CTRL = 0V or float

= 5.25V, CTRL = 0V or float

= 0V or float, CTRL = 3.6V

= 5.25V, CTRL = 0V or float

= 0V or float, CTRL = 3.6V

20

1.1

4

nA

BUSL CTRLL

BUSH

BUS

μA

-2

-

μA

CTRLH

V

Pull-Down Resistor, R

-

MΩ

BUS

VBUS

CTRL Pull-Down Resistor, R

NOTES:

-

4

-

CTRL

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 data sheet.

6. Parts are 100% tested at +25°C. Limits across the full temperature range are guaranteed by design and correlation.

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

8. 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 NC1 and NC2 or between NO1 and NO2.

Test Circuits and Waveforms

C

V

DD

V

t < 20ns

r

t < 20ns

f

BUSH

LOGIC

INPUT

50%

V

CTRL

NO or NC

BUSL

V

INPUT

V

t

OUT

OFF

SWITCH

INPUT

COMx

SWITCH

INPUT

V

VBUS

INPUT

0V

V

OUT

90%

C

L

R

V

L

GND

BUS

10pF

50Ω

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

FN6403.0

December 5, 2006

5

ISL54207

Test Circuits and Waveforms (Continued)

V

DD

C

CTRL

NOx

V

OUT

INPUT

COMx

V

BUSH

NCx

LOGIC

INPUT

C

R

50Ω

L

10pF

VBUS

V

BUSL

GND

V

BUS

V

OUT

90%

SWITCH

OUTPUT

0V

t

D

Repeat test for all switches. C includes fixture and stray

L

capacitance.

FIGURE 2A. MEASUREMENT POINTS

FIGURE 2. BREAK-BEFORE-MAKE TIME

FIGURE 2B. TEST CIRCUIT

V

DD

C

r

= V /100mA

r

= V /40mA

ON

1

ON

1

CTRL

NCx

NOx

V

NOx

NCx

OV or Float

VBUS

4.4V to 5.25V

VBUS

V

1

100mA

40mA

COMx

GND

Repeat test for all switches.

FIGURE 3. AUDIO r

Repeat test for all switches.

FIGURE 4. USB r

TEST CIRCUIT

ON

FN6403.0

December 5, 2006

6

ISL54207

Test Circuits and Waveforms (Continued)

V

DD

V

DD

C

CTRL

SIGNAL

GENERATOR

75Ω

NCx or NOx

NCx

COMx

VBUS

COMx

IMPEDANCE

ANALYZER

0V or Float

V

or

BUSL

V

BUSH

COMx

GND

R or L

ANALYZER

N.C.

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 5. CAPACITANCE TEST CIRCUIT

FIGURE 6. AUDIO CROSSTALK TEST CIRCUIT

V

DD

C

t

ri

CTRL

VBUS

90%

50%

V

BUSH

15.8Ω

10%

90%

DIN+

DIN-

t

skew_i

OUT+

NO1

NO2

COM1

COM2

DIN+

50%

10%

45Ω

143Ω

15.8Ω

C

L

OUT-

DIN-

t

fi

45Ω

t

C

143Ω

ro

L

90%

10%

90%

50%

10%

GND

OUT+

OUT-

t

skew_o

|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.

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

t

f0

FIGURE 7A. MEASUREMENT POINTS

FIGURE 7B. TEST CIRCUIT

FIGURE 7. SKEW TEST

FN6403.0

December 5, 2006

7

ISL54207

Application Block Diagram

VDD

mCONTROLLER

ISL54207

VBUS

CTRL

LOGIC CIRCUITRY

22kΩ

USB

D-

4MΩ

HIGH-SPEED

TRANSCEIVER

NO1

NO2

D+

COM1

COM2

50kΩ

NC1

NC2

NTSC or PAL

VIDEO

AUDIO

GND

NC1 and NC2 Audio/Video Switches

Detailed Description

The two NC (normally closed) audio/video switches (NC1,

NC2) are 3Ω switches that can pass signals that swing

below ground by as much as 1.5V. They were designed to

pass ground reference audio signals and DC restored

composite base-band signals (CVBS), including negative

synchronizing pulse with minimal insertion loss and very low

distortion and degradation.

The ISL54207 device is a dual single pole/double throw

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

power supply in the range of 2.7V to 3.6V. It was designed to

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

differential data signals and mono audio/composite video

baseband signals (CVBS). It comes in tiny μTQFN and

TDFN packages for use in cameras, camcorders, video MP3

players, PDAs, cell phones, and other personal media

players.

The -3dB bandwidth into 75Ω is 338MHz (Figure 17).

Crosstalk between NC1 and NC2 @ 4MHz is -78dB

(Figure 16), which allows composite video to be routed

through one switch and mono-audio through the other switch

with little interference.

The part consists of two 3Ω audio/video switches and two

5Ω USB switches. The audio/video switches can accept

signals that swing below ground. They were designed to

pass ground reference audio or dc restored with synch

composite video signals with minimal distortion. The USB

switches were designed to pass high-speed USB differential

data signals with minimal edge and phase distortion.

The recommended maximum signal range is from -1.5V to

1.5V. You can apply positive signals greater than 1.5V but

the r

resistance of the switch increases rapidly above

ON

1.5V. The signal should not be allowed to exceed the V

rail or swing more negative than -1.5V.

DD

The ISL54207 was specifically designed for digital cameras,

camcorders, MP3 players, cell phones and other personal

media player applications that need to combine the

audio/video jacks and the USB data connector into a single

shared connector, thereby saving space and component

cost. A typical application block diagram of this functionality

is shown above.

Over a signal range of ±1V (0.707Vrms) with V

> 2.7V,

resistance

DD

these switches have an extremely low r

ON

variation. They can pass a ground referenced audio signal

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

15.6mW into a 32Ω headphone speaker load. See

Figures 10, 11, 12, and 13 THD+N performance curves.

The ISL54207 incorporates circuitry for the detection of the

Figure 8 and 9 shows the vector scope plots of a standard

NTSC color bar signal at both the input (Figure 8) and output

(Figure 9) of the ISL54207. The plots show that except for a

USB V

voltage, which is used to switch between the

BUS

audio/video drivers and USB transceiver of the media player.

The ISL54207 contains a logic control pin (CTRL) that when

driven Low while VBUS is Low, opens all switches and puts

little attenuation due to switch r

and test fixture cabling,

ON

there is virtually no degradation of the video waveform

through the switch.

the part into a low power state, drawing typically 1nA of I

current.

DD

A detailed description of the two types of switches is

provided in the following sections. The USB transmission

and audio/video playback are intended to be mutually

exclusive operations.

FN6403.0

December 5, 2006

8

ISL54207

NO1 and NO2 USB Switches

The two NO (normally open) USB switches (NO1, NO2) are

5Ω bidirectional switches that are designed to pass

high-speed USB differential signals in the range of ±0V to

400mV. The switches have low capacitance and high

bandwidth to pass USB high-speed signals (480Mbps) with

minimum edge and phase distortion to meet USB 2.0 signal

quality specifications. See Figure 14 for High-speed Eye

Pattern taken with switch in the signal path.

The maximum signal range for the USB switches is from

-1.5V to V . The signal voltage at NO1 and NO2 should

DD

not be allowed to exceed the V

ground by more than -1.5V.

voltage rail or go below

DD

The NO switches are active (turned ON) whenever the V

BUS

+ 0.8V. VBUS is internally pulled low, so

voltage is ≥ to V

DD

when VBUS is floating, the USB switches are OFF.

FIGURE 8. VECTOR-SCOPE PLOT BEFORE SWITCH

Note: Whenever the NO switches are ON, the audio and

video drivers need to be at AC or DC ground or floating to

keep from interfering with the data transmission.

ISL54207 Operation

The discussion that follows will discuss using the ISL54207 in

the typical application shown in the block diagram on page 8.

LOGIC CONTROL

The state of the ISL54207 device is determined by the

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

Refer to truth-table on page 2 of the data sheet.

The VBUS pin and CTRL pin are internally pulled low

through 4MΩ resistors to ground and can be left floating. The

CTRL control pin is only active when VBUS is logic “0”.

Logic control voltage levels:

VBUS = Logic “0” (Low) when VBUS ≤ V

Floating.

+ 0.2V or

+ 0.8V

DD

FIGURE 9. VECTOR-SCOPE PLOT AFTER SWITCH

VBUS = Logic “1” (High) when VBUS ≥ V

DD

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

CTRL = Logic “1” (High) when ≥ 1.4V

Figure 18 shows the differential gain (DG) and differential

phase (DP) plots at the output of the switch using an actual

NTSC composite video signal and a VM700A Video

Measurement Test Set. DG = 0.28% and DP = 0.04°.

Audio/Video Mode

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

part will be in the Audio/Video mode. In Audio/Video mode

the NC1 and NC2 3Ω audio/video switches are ON and the

NO1 and NO2 5Ω USB switches are OFF (high impedance).

These NC switches are uni-directional switches. The

audio/video sources should be connected at the NC side of

the switch (pins 7 and 8) and the speaker load and video

receiver should be connected at the COM side of the switch

(pins 3 and 4).

In a typical application, V

will be in the range of 2.7V to

DD

3.6V and will be connected to the battery or LDO of the

media player. When a audio/video jack is plugged into the

common connector, nothing gets connected at the VBUS pin

(it is floating) and as long as the CTRL = Logic “1,” the

ISL54207 part remains in the audio/video mode and the

media player audio and video drivers can drive the speaker

and video display.

The NC switches are active (turned ON) whenever the V

BUS

+ 0.2V or floating and the CTRL voltage ≥

voltage is ≤ to V

DD

to 1.4V.

Note: Whenever the NC switches are ON the USB

transceivers need to be in the high impedance state or static

high or low state.

FN6403.0

December 5, 2006

9

ISL54207

USB Mode

circuit is not active and no current will flow through the clamp

into the V supply.

DD

In a USB application, the situation can exist where the V

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

Logic “1,” the part will go into USB mode. In USB mode, the

NO1 and NO2 5Ω switches are ON and the NC1 and NC2

3Ω audio switches are OFF (high impedance). When a USB

cable from a computer or USB hub is connected at the

common connector, the voltage at the VBUS pin will be

driven to be in the range of 4.4V to 5.25V. The ISL54207 part

will go into the USB mode. In USB mode, the computer or

USB hub transceiver and the media player USB transceiver

are connected and digital data will be able to be transmitted

back and forth.

BUS

voltage from the computer could be applied at the VBUS pin

before the V voltage is up to its normal operating voltage

DD

range and current will flow through the clamp into the V

DD

power supply bus. This current could be quite high when

is OFF or at 0V and could potentially damage other

V

DD

components connected in the circuit. In the application

circuit, a 22kΩ resistor has been put in series with the VBUS

pin to limit the current to a safe level during this situation.

It is recommended that a current limiting resistor in the range

of 10kΩ to 50kΩ be connected in series with the VBUS pin. It

will have minimal impact on the logic level at the VBUS pin

during normal USB operation and protect the circuit during

When the USB cable is disconnected, the ISL54207

automatically turns the NO1 and NO2 switches OFF.

Low Power Mode

the time V

is present before V is up to its normal

DD

BUS

operating voltage.

If the VBUS pin = Logic “0” and CTRL pin = Logic “0,” the

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

the NCx switches and the NOx switches are OFF (high

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

current.

Note: No external resistor is required in applications where

will not exceed V by more than 2.55V.

V

BUS

DD

POWER

EXTERNAL V

SERIES RESISTOR

BUS

The ISL54207 contains a clamp circuit between VBUS and

VDD. Whenever the V voltage is greater than the V

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

to the ISL54207 part. Its voltage should be kept in the range

of 2.7V to 3.6V when used in a USB/Audio/Video application

BUS

DD

voltage by more than 2.55V, current will flow through this

clamp circuitry into the V power supply bus.

to ensure you get proper switching when the V

at its lower limit of 4.4V.

voltage is

BUS

DD

During normal USB operation, V

is in the range of 2.7V to

DD

is in the range of 4.4V to 5.25V. The clamp

3.6V and V

BUS

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

A

0.11

0.4

0.3

0.2

0.1

0

R

V

= 32Ω

R

V

= 32Ω

= 0.707V

LOAD

= 3V

LOAD

DD

RMS

0.1

3V

P-P

0.09

0.08

0.07

0.06

0.05

0.04

V

= 2.6V

DD

2.5V

V

= 2.7V

P-P

DD

V

= 3.6V

DD

2V

P-P

V

= 3V

DD

1V

P-P

20

200

FREQUENCY (Hz)

2k

20k

20

200

FREQUENCY (Hz)

2k

20k

FIGURE 10. THD+N vs SUPPLY VOLTAGE vs FREQUENCY

FIGURE 11. THD+N vs SIGNAL LEVELS vs FREQUENCY

FN6403.0

December 5, 2006

10

ISL54207

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

A

0.5

0.4

0.3

0.2

0.1

0

0.5

0.4

0.3

0.2

0.1

0

R

= 32Ω

R

= 32Ω

LOAD

FREQ = 1kHz

= 3V

LOAD

FREQ = 1kHz

= 3V

V

DD

0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

0

10

20

30

40

50

OUTPUT VOLTAGE (V

)

P-P

OUTPUT POWER (mW)

FIGURE 12. THD+N vs OUTPUT VOLTAGE

FIGURE 13. THD+N vs OUTPUT POWER

TIME (10ns/DIV)

FIGURE 14. EYE PATTERN: 480Mbps WITH NOx SWITCHES IN THE SIGNAL PATH

FN6403.0

December 5, 2006

11

ISL54207

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

A

1

0

NOx SWITCH

R

= 75Ω

= 0.2V

L

-10

0

V

to 2V

P-P P-P

IN

-20

-30

-40

-50

-60

-70

-80

-1

-2

-3

-4

-90

R

= 50Ω

L

V

= 0.2V

to 2V

IN

P-P P-P

-110

0.001

0.01

0.1

1

3

6 10

100

500

1M

10M

100M

1G

FREQUENCY (MHz)

FREQUENCY (Hz)

FIGURE 16. VIDEO TO AUDIO CROSSTALK

FIGURE 15. FREQUENCY RESPONSE

1

0

NCx SWITCHES

-1

-2

-3

-4

R

= 75Ω

L

V

= 0.2V

to 2V

P-P

IN

P-P

10M

FREQUENCY (Hz)

1M

100M

1G

FIGURE 17. FREQUENCY RESPONSE

FIGURE 18. DIFFERENTIAL PHASE AND DIFFERENTIAL GAIN

Die Characteristics

SUBSTRATE POTENTIAL (POWERED UP):

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

TRANSISTOR COUNT:

98

PROCESS:

Submicron CMOS

FN6403.0

December 5, 2006

12

ISL54207

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

FN6403.0

December 5, 2006

13

ISL54207

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

FN6403.0

December 5, 2006

14


型号：	ISL54207
厂家：	Intersil
描述：	Low Voltage, Dual SPDT, USB/CVBS/ Audio Switches, with Negative Signal Capability 低电压，双路SPDT ， USB / CVBS /音频开关，可处理负信号功能开关光电二极管
文件：	总14页 (文件大小：468K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

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