ISL54208IRZ - INTERSIL - Datasheet.Live

FN6410.0

ISL54208

Low Voltage, Dual SPDT, USB/CVBS/

Audio Switches, with Negative Signal

Capability

The Intersil ISL54208 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.

The ISL54208 logic control pins are 1.8V logic compatible

which allows control via a standard μcontroller. With a VDD

voltage in the range of 2.7V to 3.6V the IN pin voltage can

exceed the VDD rail allowing for the USB 5V VBUS voltage

from a computer to directly drive the IN pin to switch

between the audio/video and USB si gnal sources in the

portable device. The part has an enable control pin to open

all the switches and put the part in a low power state.

The ISL54208 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 to

+85°C.

Related Literature

• Technical Brief TB363 “Guidelines for Handling and

Processing Moisture Sensitive Surface Mount Devices

(SMDs)”

• Application Note AN557 “Recommended Test Procedures

for Analog Switches”

Features

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

• Low Distortion Negative Signal Capability

• 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. . . . . . . . . . . . . . . . . . . . . . . . . .0.04°

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

• Single Supply Operation (VDD) . . . . . . . . . . . . 1.8V to 5.5V

• -3dB Bandwidth USB NOx Switches . . . . . . . . . . . 630MHz

• Available in μTQFN and TDFN Packages

• Pb-Free Plus Anneal (RoHS Compliant)

• Compliant with USB 2.0 Short Circuit Requirements

Without Additional External Components

Applications

• Digital Camera and Camcorders

• Video MP3 and other Personal Media Players

• Cellular/Mobile Phones

•PDA’s

• Audio/Video/USB Switching

Application Block Diagram

LOGIC CIRCUITRY

ISL54208

USB

TRANSCEIVER

HIGH-SPEED

AUDIO

USB AND AUDIO/VIDEO JACK

COM1

COM2

GND

NO1

NO2

NC1

NC2

VDD

CTRL

μCONTROLLER

4MΩ

50kΩ

NTSC or PAL

VIDEO

D+

D-

VBUS

Data Sheet December 18, 2006

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.

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

2FN6410.0

December 18, 2006

Pinouts (Note 1)

ISL54208

(10 LD μTQFN)

TOP VIEW

ISL54208

(10 LD TDFN)

TOP VIEW

NOTE:

1. ISL54208 Switches shown for IN = Logic “0” and CTRL = Logic “1”.

NO1

COM 1 NC1

CTRL

8NO2

COM 2 NC2

GND

VDD LOGIC

CONTROL

50k

NO1

COM 1

NC1

8NO2

COM 2

NC2

VDD

LOGIC

CONTROL

50k

GND

4M CTRL

Truth Table

ISL54208

IN CTRL NC1, NC2 NO1, NO2

00OFFOFF

0 1 ON OFF

1XOFFON

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

supply.

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

2.7V to 3.6V supply.

Pin Descriptions

ISL54208

PIN NO. NAME FUNCTION

1 VDD Power Supply

2 IN Digital Control Input

3 COM1 Voice/Video and USB Common Pin

4 COM2 Voice/Video and USB Common Pin

5 GND Ground Connection

6 NC2 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/Vidio Enable)

Ordering Information

PART NUMBER

(Note) PART

MARKING TEMP. RANGE (°C) PACKAGE (Pb-Free) PKG. DWG. #

ISL54208IRUZ-T FR -40 to +85 10 Ld 2.1x1.6mm μTQFN Tape and Reel L10.2.1x1.6A

ISL54208IRZ-T 4208 -40 to +85 10 Ld 3mmx3mm TDFN Tape and Reel L10.3x3A

ISL54208IRZ 4208 -40 to +85 10 Ld 3mmx3mm TDFN 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.

ISL54208

3FN6410.0

December 18, 2006

Absolute Maximum Ratings Thermal Information

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

Input Voltages

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

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

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

Output Voltages

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

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

Peak Current (NCx, COMx)

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

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

Peak Current (NOx)

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

ESD Rating:

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

MM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . >400V

CDM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .>1.4kV

Thermal Resistance (Typical, Note 3) θJA (°C/W)

10 Ld μTQFN Package . . . . . . . . . . . . . . . . . . . . . . . 130

10 Ld 3x3 TDFN Package. . . . . . . . . . . . . . . . . . . . . 110

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

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

Operating Co nditions

Temperature Range ISL54208IRUZ and

ISL54208IRZ. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -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.

NOTES:

2. Signals on NOx, NCx, COMx, CTRL, IN exceeding VDD or GND by specified amount are clamped. Limit current to maximum current ratings.

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

Electrical Specifications - 2.7V to 3.6V Supply Test Conditions: VDD = +3.3V, GND = 0V, VINH = 1.4V, VINL = 0.5V, VCTRLH = 1.4V,

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

PARAMETER TEST CONDITIONS TEMP

(°C) (NOTE 5)

MIN TYP (NOTE 5)

MAX UNITS

ANALOG SWITCH CHARACTERISTICS

Audio/Video Switches (NC1, NC2)

Analog Signal Range, VANALOG VDD = 3.0V, IN = 0.5V, CTRL = 1.4V Full -1.5 - 1.5 V

ON Resistance, RON VDD = 3.0V, IN = 0.5V, CTRL = 1.4V, ICOMx = 100mA,

VNCx = -0.85V to 0.85V,

(See Figure 3)

25 - 2.65 4 Ω

Full - - 5.5 Ω

RON Matching Between Channels,

ΔRON VDD = 3 . 0 V, IN = 0.5V, CT R L = 1.4V, ICOMx = 100mA,

VNCx = Voltage at max RON over signal ran ge o f -0.85V

to 0.85V, (Note 8)

25 - 0.02 0.13 Ω

Full - - 0.16 Ω

RON Flatness, RFLAT(ON) VDD = 3.0V, IN = 0.5V, CTRL = 1.4V, ICOMx = 100mA,

VNCx = -0.85V to 0.85V, (Note 7) 25 - 0.03 0.05 Ω

Full - - 0.07 Ω

Discharge Pull-Down Resistance,

RNC1, RNC2 VDD = 3.6V, IN = 0V, CTRL = 3.6V, VCOM- or VCOM+ =

-0.85V, 0.85V, VNCx = -0.85V, 0.85V,

VNOx = floating, Measure curre nt t hroug h th e discharge

pull-down resistor and calculate re sistance value.

25 - 50 - kΩ

USB Switches (NO1, NO2)

Analog Signal Range, VANALOG VDD = 3.6V, IN = 1.4V, CTRL = 1.4V Full 0 - VDD V

ON Resistance, RON VDD = 3.6V, IN = 1.4V, CTRL = 1.4V, ICOMx = 40mA,

VNOx = 0V to 400mV

(See Figure 4)

25 - 4.6 5 Ω

Full - - 6.5 Ω

RON Matching Between Channels,

ΔRON VDD = 3.6V, IN = 1.4V, CTRL = 1.4V,

ICOMx = 40mA, VNOx = Voltage at max RON,

(Note 8)

25 - 0.06 0.5 Ω

Full - - 0.55 Ω

RON Flatness, RFLAT(ON) VDD = 3.6V, IN = 1.4V, CTRL = 1.4V,

ICOMx = 40mA, VNOx = 0V to 400mV, (Note 7) 25 - 0.4 0.6 Ω

Full - - 1.0 Ω

ISL54208

4FN6410.0

December 18, 2006

OFF Leakage Current, INOx(OFF) VDD = 3.6V, IN = 0V, CTRL = 3.6V, VCOMx = 0.5V, 0V,

VNOx = 0V, 0.5V, VNCx = float 25 -10 - 10 nA

Full -70 - 70 nA

ON Leakage Current, INOx VDD = 3.3V, IN = 3.3V, CTRL = 0V or 3.3V, VNOx = 2.0V,

VCOMx , VNCx = float 25 -10 2 10 nA

Full -75 - 75 nA

DYNAMIC CHARACTERISTICS

Tu rn-ON Ti me, tON VDD = 2.7V, RL = 50Ω, CL = 10pF, (See Figure 1) 25 - 67 - ns

Turn-OFF Time, tOFF VDD = 2.7V, RL = 50Ω, CL = 10pF, (See Figure 1) 25 - 48 - ns

Break-Before-Make Time Delay, tDVDD = 2.7V, RL = 50Ω, CL = 10pF, (See Figure 2) 25 - 18 - ns

Skew, tSKEW VDD = 3.3V, IN = 3.3V, CTRL = 3.3V, RL = 45Ω,

CL = 10pF, tR = tF= 750ps at 480Mbps,

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

25 - 50 - ps

Total Jitter, tJVDD = 3.3V, IN = 3.3V, CTRL = 3.3V, RL = 45Ω,

CL = 10pF, tR = tF = 750ps at 480Mbps 25 - 210 - ps

Propagation Delay, tPD VDD = 3.3V, IN = 3.3V, CTRL = 3.3V, RL = 45Ω,

CL= 10pF, (See Figure 7) 25 - 250 - ps

Crosstalk (Channel-to-Channel),

NC2 to COM1, NC1 to COM2 VDD = 3.3V, IN = 0V, CTRL = 3.3V, RL = 75Ω,

f = 4MHz, VNCx = 300mVP-P, (See Figure 6) 25 - -78 - dB

Differential Gain VSIGNAL = 300mVp-p, VOFFSET = 0V to 0.7V,

f = 3.58MHz, RL = 75 25 - 0.28 - %

Differential Phase VSIGNAL = 300mVp-p, VOFFSET = 0V to 0.7V,

f = 3.58MHz, RL = 75 25 - 0.04 - deg

Total Harmonic Distortion f = 20Hz to 20kHz, VDD = 3.0V, IN = 0V,

CTRL = 3.0V, VNCx = 0.707VRMS (2VP-P), RL = 32Ω

25 - 0.06 - %

NCx (Audio/Video) Switch -3dB

Bandwidth Signal = 8dBm, RL = 75Ω, CL = 5pF, (See Figure 14) 25 - 338 - MHz

NOx (USB) Switch -3dB Bandwidth Signal = 0dBm, 0.2VDC offset, RL = 50Ω, CL = 5pF 25 - 630 - MHz

NOx OFF Capacitance, CNOx(OFF) f = 1MHz, VDD = 3.0V, IN = 0V, CTRL = 3.0V,

VNOx = VCOMx = 0V, (See Figure 5) 25 - 6 - pF

NCx OFF Capacitance, CNCx(OFF) f = 1MHz, VDD = 3.0V, IN = 3.0V, CTRL = 3.0V,

VNCx = VCOMx = 0V, (See Figure 5) 25 - 9 - pF

COMx ON Capacitance, CCOMx(ON) f = 1MHz, VDD = 3.0V, IN = 3.0V, CT RL = 3.0V,

VNOx = VCOMx = 0V, (See Figure 5) 25 - 10 - pF

POWER SUPPLY CHARACTERISTICS

Power Supply Range, VDD Full 1.8 5.5 V

Positive Supply Current, IDD VDD = 3.6V, IN = 0V or 3.6V, CTRL = 3.6V 25 - 6 8 μA

Full - - 10 μA

Positive Supply Current, IDD

(Low Power State) VDD = 3.6V, IN = 0V, CTRL = 0V or float 25 - 1 7 nA

Full - - 140 nA

DIGITAL INPUT CHARACTERISTICS

Voltage Low, VINL, VCTRLL VDD = 2.7V to 3.6V Full - - 0.5 V

Voltage High, VINH , VCTRLH VDD = 2.7V to 3.6V Full 1.4 - - V

Input Current, IINL, ICTRLL VDD = 3.6V, IN = 0V, CTRL = 0V Full -50 20 50 nA

Input Current, IINH VDD = 3.6V, IN = 3.6V, CTRL = 0V Full -50 20 50 nA

Electrical Specifications - 2.7V to 3.6V Supply Test Conditions: VDD = +3.3V, GND = 0V, VINH = 1.4V, VINL = 0.5V, VCTRLH = 1.4V,

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

PARAMETER TEST CONDITIONS TEMP

(°C) (NOTE 5)

MIN TYP (NOTE 5)

MAX UNITS

ISL54208

5FN6410.0

December 18, 2006

Input Current, ICTRLH VDD = 3.6V, IN = 0V, CTRL = 3.6V Full -2 1.1 2 μA

CTRL Pull-Down Resistor, RCTRL VDD = 3.6V, IN = 0V, CTRL = 3.6V Full - 4 - MΩ

NOTES:

4. VLOGIC = Input voltage to perform proper function.

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. Parameters with limits 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. RON matching between channels is calculated by subtracting the channel with the highest max RON value from the channel with lowest max

RON value, between NC1 and NC2 or between NO1 and NO2.

Test Circuits and Waveforms

Logic input waveform is inverted for switches that have the opposite

logic sense.

FIGURE 1A. MEASUREMENT POINTS

Repeat test for all switches. CL includes fixture and stray

capacitance.

FIGURE 1B. TEST CIRCUIT

FIGURE 1. SWITCHING TIMES

FIGURE 2A. MEASUREMENT POINTS

Repeat test for all switches. CL includes fixture and stray

capacitance. FIGURE 2B. TEST CIRCUIT

FIGURE 2. BREAK-BEFORE-MAKE TIME

Electrical Specifications - 2.7V to 3.6V Supply Test Conditions: VDD = +3.3V, GND = 0V, VINH = 1.4V, VINL = 0.5V, VCTRLH = 1.4V,

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

PARAMETER TEST CONDITIONS TEMP

(°C) (NOTE 5)

MIN TYP (NOTE 5)

MAX UNITS

50%

tr <20ns

tf <20ns

tOFF

90%

VDD

VINPUT

tON

LOGIC

INPUT

SWITCH

INPUT

SWITCH

OUTPUT

90%

VOUT

VOUT V(INPUT) RL

RLRON()

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

SWITCH

INPUT

VIN

VOUT

RL CL

COMx

NO or NC

50Ω10pF

GND

VDD C

CTRL

VINPUT

90%

VDD

LOGIC

INPUT

SWITCH

OUTPUT 0V

VOUT

VIN

COMx

RLCL

VOUT

10pF

50Ω

NOx

NCx

VDD

GND

VINPUT

CTRL

ISL54208

6FN6410.0

December 18, 2006

FIGURE 3. AUDIO/VIDEO RON TEST CIRCUIT FIGURE 4. USB RON TEST CIRCUIT

FIGURE 5. CAPACITANCE TEST CIRCUIT FIGURE 6. NCx CROSSTALK TEST CIRCUIT

Test Circuits and Waveforms (Continued)

VDD C

NCx

COMx

GND

VNCx

RON = V1/100mA

100mA

Repeat test for all switches.

CTRL

VDD C

VDD

NOx

COMx

GND

VNOx

RON = V1/40mA

40mA

Repeat test for all switches.

CTRL

VDD C

GND

NCx or NOx

COMx

IMPEDANCE

ANALYZER 0V or

Repeat test for all switches.

CTRL

VDD

ANALYZER

VDD C

NCx

SIGNAL

GENERATOR

RLGND

COMx 75Ω

COMx NCx

Signal direction through switch is reversed, worst case values

are recorded. Repeat test for all switches.

CTRL

ISL54208

7FN6410.0

December 18, 2006

FIGURE 7A. MEASUREMENT POINTS FIGURE 7B. TEST CIRCUIT

FIGURE 7. SKEW TEST

Test Circuits and Waveforms (Continued)

DIN+

DIN-

OUT+

OUT-

50%

90%

10%

90%

50%

90%

50%

tri

tfitro

tf0

tskew_i

tskew_o

OUT+

COM2

NO1

GND

VDD C

NO2

COM1

OUT-

DIN+

DIN-

|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 throug h the Switch for Input Signa ls.

15.8Ω

143W

143Ω

45Ω

CTRL

VDD

ISL54208

8FN6410.0

December 18, 2006

Application Block Diagrams

Detailed Description

The ISL54208 device is a dual single pole/double throw

(SPDT) analog switch device that can operate from a single

dc power supply in the range of 1.8V to 5.5V. 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 part consists of two 3Ω au dio/video switches and two

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

signals that swing below groun d. 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 disto rtio n.

The ISL54208 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. Typical application block diagrams of this functionality

is shown above.

The ISL54208 logic control pins are 1.8V logic compatible

and can be driven by a standard μcontroller. It has a single

logic control pin (IN) that selects between the audio/video

switches and the USB switches. The ISL54208 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 typically 1nA of IDD current.

A detailed description of the two types of switches is

provided in the sections below. The USB transmission and

ISL54208

USB

TRANSCEIVER

HIGH-SPEED

AUDIO

USB AND AUDIO/VIDEO JACK

COM1

COM2

GND

NO1

NO2

NC1

NC2

VDD

CTRL

LOGIC CIRCUITRY

μCONTROLLER

4MΩ

50kΩ

NTSC or PAL

VIDEO

D+

D-

ISL54208

USB

TRANSCEIVER

HIGH-SPEED

AUDIO

USB AND AUDIO/VIDEO JACK

COM1

COM2

GND

NO1

NO2

NC1

NC2

VDD

CTRL

LOGIC CIRCUITRY

μCONTROLLER

22kΩ

4MΩ4MΩ

50kΩ

NTSC or PAL

VIDEO

D+

D-

LOGIC CONTROL VIA MICRO-PROCESSOR

LOGIC CONTROL VIA VBUS VOLTAGE FROM COMPUTER OR USB HUB

VBUS

ISL54208

9FN6410.0

December 18, 2006

audio/video playback are intended to be mutually exclusive

operations.

NC1 and NC2 Audio/Video Switches

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 -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 recommended maximum signal range is from -1.5V to

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

the rON resistance of the switch increases rapidly above

1.5V. The signal should not be allowed to excee d the VDD

rail or swing more negative than -1.5V.

Over a signal range of ±1V (0.707Vrms) with VDD >2.7V,

these switches have an extremely low rON resistance

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.

Figures 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 ISL54208. The plots show that except for a

little attentuation, due to switch RON and test fixture cabling,

there is virtually no degradati on of the video wave form

through the switch.

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 VM7 00A Video

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

The 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).

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

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

Note: Whenever the NC switches are ON the USB

transceiver drivers need to be in the high impedance state or

static high or low state.

NO1 and NO2 USB Switches

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

5Ω bidirectional switches that were designed to pass high-

speed USB differential signals in the range of ±0V to 400mV.

These switches have low capacitance and high bandwidth to

pass USB high-speed signals (480Mbps) with minimum

edge and phase distortion to meet high-speed USB 2.0 high-

speed signal quality specifi c ations. 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 VDD. The signal voltage at NO1 and NO2 sh ould

not be allow to exceed the VDD voltage rail or go below

ground by more than -1.5V.

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

voltage is to ≥1.4V.

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.

FIGURE 8. VECTOR-SCOPE PLOT BEFORE SWITCH

FIGURE 9. VECTOR-SCOPE PLOT AFTER SWITCH

ISL54208

10 FN6410.0

December 18, 2006

ISL54208 Operation

The discussion that follows wi ll discuss using the ISL54 208 in

the typical applicatio n shown in the block diagrams on

page 8.

VDD SUPPLY

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 1.8V to

5.5V.

In a typical USB/Audio/Video application for portable battery

powered devices the VDD voltage will come from a battery 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 VDD voltage be ≥3.3V in order to get

a USB data signal level above 2.5V.

LOGIC CONTROL

The state of the ISL54208 device is determined by the

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

to truth-table on page 2 of data sheet. These logic pins are

1.8V compatible with VDD in the ra nge of 2.7V to 3.6V and

can be controlled by a standard μprocessor.

The CTRL pin is internally pulled low through a 4MΩ

resistors 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 IN pin does not have an internal pull-down resistor and

must not be allowed to float. It must be driven High or Low.

The voltage at the IN pin can exceed the VDD voltage by as

much as 2.55V. This allows the VBUS 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 2.7V to 3.6V. An

external pull-down resistor is required from the IN pin to

ground when directly driving the IN pin with the computer

VBUS voltage. See the section titled “USING THE

COMPUTER VBUS VOLTAGE TO DRIVE THE “IN’ PIN”.

Logic control voltage levels:

IN = Logic “0” (Low) when ≤0.5V

IN = Logic “1” (High) when IN ≥1.4V

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

CTRL = Logic “1” (High) when ≥1.4V

Audio/Video Mode

If the IN pin = Logic “0” and CTRL pin = Logic “1,” th e 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 ar e OFF (high impedance).

When nothing is plugged into the common connector or a

audio/video jack is plugged into the common connector, the

μprocessor will sense that there is no voltage at the VBUS

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

of the ISL54208 low. As long as the CTRL = Logic “1,” the

ISL54208 part will be in the audio/video mode and the media

player audio and video drivers can drive the speaker and

video display.

USB Mode

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 NO1 and

NO2 5Ω switches are ON and the NC1 and NC2 3Ω

audio/video switches are OFF (high impedance).

When a USB cable from a computer or USB hub is

connected at the common connector, the μprocessor will

sense the present of the 5V VBUS and drive the IN pin

voltage high. The ISL54208 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.

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/Video or Low Power Mode.

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

NCx switches and the NOx switches are OFF (high

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

current.

USING THE COMPUTER VBUS VOLTAGE TO DRIVE THE

“IN” PIN

External IN Pull-Down Resistor

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

pin you can directly drive the IN pin using the VBUS voltage

from the computer or USB hub. In order to do this you must

connected an external pull-down resistor from the IN pin to

ground.

When an audio/video jack or nothing is connected at the

common connector the external pull-down resistor will pull

the IN pin low putting the ISL54208 in the Audio/Video Mode

or Low Power Mode depending on the condition of the CTRL

pin.

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/Video Mode or

Low Power Mode depending on the condition of the CTRL

pin.

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

by as much as 2.55V. This allows the VBUS 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 2.7V to 3.6V.

ISL54208

11 FN6410.0

December 18, 2006

EXTERNAL SERIES RESISTOR AT IN LOGIC CONTROL

The ISL54208 contains a clamp circuit between IN and VDD.

Whenever the IN voltage is greater than the VDD voltage by

more than 2.55V, current will flow through this clamp circuitry

into the VDD power supply bus.

During normal USB operation, VDD is in the range of 2.7V to

3.6V and IN (VBUS voltage from computer or USB hub) is in

the range of 4.4V to 5.25V, the clamp circuit is not active and

no current will flow through the clamp into the VDD supply.

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

voltage from the computer could be applied at the IN pin

before the VDD voltage is up to its normal operating voltage

range and current will flow through the clamp into the VDD

power supply bus. This current could be quite high when

VDD is OFF or at 0V and could potentially damage other

components connected in the circuit. In the application

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

to limit the current to a safe level duri ng this situation.

It is recommended that a current limiting resistor in the range

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

have minimal impact on the logic level at the IN pin during

normal USB operation and protect the circuit during the time

VBUS is present before VDD is up to its normal operating

voltage.

Note: No external resistor is required in applications where

IN pin voltage will not exceed VDD by more than 2.55V.

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

FIGURE 10. THD+N vs SUPPLY VOLTAGE vs FREQUENCY FIGURE 11. THD+N vs SIGNAL LEVELS vs FREQUENCY

FIGURE 12. THD+N vs OUTPUT VOLTAGE FIGURE 13. THD+N vs OUTPUT POWER

THD+N (%)

FREQUENCY (Hz)

20 200 2K 20K

0.04

0.05

0.06

0.07

0.08

0.09

0.1

0.11

VDD = 2.6V

VDD = 2.7V

VDD = 3.6V

VDD = 3V

RLOAD = 32Ω

VLOAD = 0.707VRMS

THD+N (%)

FREQUENCY (Hz)

20 200 2K 20K

RLOAD = 32Ω

VDD = 3V

0.1

0.2

0.3

0.4

2VP-P

1VP-P

3VP-P

2.5VP-P

THD+N (%)

OUTPUT VOLTAGE (VP-P)

00.511.522.533.5

0.1

0.2

0.3

0.4

0.5 RLOAD = 32Ω

FREQ = 1kHz

VDD =3V

THD+N (%)

OUTPUT POWER (mW)

0 1020304050

0.1

0.2

0.3

0.4

0.5 RLOAD = 32Ω

FREQ = 1kHz

VDD =3V

ISL54208

12 FN6410.0

December 18, 2006

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

FIGURE 15. FREQUENCY RESPONSE FIGURE 16. VIDEO TO AUDIO CROSSTALK

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

TIME (10ns/DIV)

VOLTAGE (835mV/DIV)

FREQUENCY (Hz)

-1

NORMALIZED GAIN (dB)

1M 10M 100M 1G

VIN = 0.2VP-P to 2VP-P

RL = 50Ω

-2

-3

-4

1NOx Switch

FREQUENCY (MHz)

-60

NORMALIZED GAIN (dB)

0.01 0.1 1 500

-70

-80

-40

-90

-110

-10

-20

-30

-50

100.001 10036

VIN = 0.2VP-P to 2VP-P

RL = 75Ω

ISL54208

13 FN6410.0

December 18, 2006

FIGURE 17. FIGURE 18.

Die Characteristics

SUBSTRATE POTENTIAL (POWERED UP):

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

TRANSISTOR COUNT:

PROCESS:

Submicron CMOS

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

FREQUENCY (Hz)

-1

NORMALIZED GAIN (dB)

1M 10M 100M 1G

VIN = 0.2VP-P to 2VP-P

RL = 75Ω

-2

-3

-4

1NCx Switches

GAIN (%)

PHASE (DEG)

ISL54208

14 FN6410.0

December 18, 2006

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

0.10 C

0.10 M CAB

0.05 M C

(ND-1) X e

0.05 CA

0.10 C

SEATING PLANE

INDEX AREA

PIN #1 ID

(DATUM A)

(DATUM B)

N-1

NX L

NX b

TOP VIEW

BOTTOM VIEW

SIDE VIEW

NX (b)

SECTION "C-C"

FOR ODD TERMINAL/SIDE

TERMINAL TIP

(A1)

DETAIL “A” PIN 1 ID

0.05 MIN

0.10 MIN

0.10 C

4xk

L10.2.1x1.6A

10 LEAD ULTRA THIN QUAD FLAT NO-LEAD PLASTIC

PACKAGE

SYMBOL

MILLIMETERS

NOTESMIN NOMINAL MAX

A 0.45 0.50 0.55 -

A1 - - 0.05 -

A3 0.127 REF -

b 0.15 0.20 0.25 5

D 2.05 2.10 2.15 -

E 1.55 1.60 1.65 -

e 0.50 BSC -

k0.20

---

L 0.35 0.40 0.45 -

N102

Nd 4 3

Ne 1 3

0-12

Rev. 3 6/06

NOTES:

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.

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 wi thin the zone indicated. The pin #1 identif ier may be

either a mold or mark feature.

7. Maximum package warpage is 0.05mm.

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

9. Same as JEDEC MO-255UABD except:

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

"L" MAX dimension = 0.45 not 0.42mm.

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

Design effort, see Intersil Technical Brief TB389.

2.00

0.80

1.75

0.25

0.50

0.275

2.50

LAND PATT ERN

ISL54208

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 lice nse is gran t ed by i mpli catio n or other wise u nder an y p a tent or patent rights of I nter sil or its subsidiaries.

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

FN6410.0

December 18, 2006

ISL54208

Thin Dual Flat No-Lead Plastic Package (TDFN)

NX (b)

SECTION "C-C"

FOR ODD TERMINAL/SIDE

TERMINAL TIP

(A1)

BOTTOM VIEW

AREA

INDEX

0.10

0.08

SIDE VIEW

0.10

C0.10

TOP VIEW

AREA

INDEX

NX L

E2/2

REF.

(Nd-1)Xe

(DATUM A)

(DATUM B)

0.10

BAC

N-1

PLANE

SEATING

NX b

D2/2

NX k

L1 9L

L10.3x3A

10 LEAD THIN DUAL FLAT NO-LEAD PLASTIC PACKAGE

SYMBOL

MILLIMETERS

NOTESMIN NOMINAL MAX

0.70 0.75 0.80

- - 0.05

0.20 REF

0.20 0.25 0.30

5, 8

2.95 3.0 3.05

2.25 2.30 2.35

7, 8

2.95 3.0 3.05

1.45 1.50 1.55

7, 8

0.50 BSC

0.25 - -

0.25 0.30 0.35

Rev. 3 3/06

NOTES:

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

2. N is the number of terminals.

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

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 wi thin the zone indicated. The pin #1 identif ier may be

either a mold or mark feature.

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

improved electrical and thermal performance.

8. Nominal dimensions are provided to assist with PCB Land

Pattern Design efforts, see Intersil Technical Brief TB389.

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

dimensions.