ISL54213IRTZ - Intersil Corporation

FN6663.0

ISL54213

MP3/USB 2.0 High Speed Switch with

Negative Signal Handling and Mute

Function

The Intersil ISL54213 dual SPDT (Single Pole/Dou ble Throw)

switch combines low distortion audio a nd accurate USB 2.0

high speed dat a (480Mb p s) signa l sw itching in the same low

voltage device . When ope rated with a 2.5V to 5.0V single

supply, this analog switch allows au dio signal sw ings below

ground, allowing the use of a common USB and audio

headphone co nnector in Personal Media Players and other

portable battery-powered devices.

The ISL54213 logic control pins are 1.8V compatible, which

allows for control via a standard µcontroller .

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

and put the part in a mute state. It’s high off-isolation

(95dB @ 100kHz) provides superior muting of audio signals.

The ISL54213 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 -4 0°C to

+85°C.

Related Literature

• Technical Brief TB363 “Guidelines fo r Handling and

Processing Moisture Sensitive Surface Mount Devices

(SMDs)”

Features

• High S peed (480Mbp s) and Full Speed (12Mbps)

Signaling Capability per USB 2.0

• Low Distortion Negative Signal Capability

• Mute Function

• Low Distortion Headphone Audio Signals

- THD+N at 1mW into 32Ω Load . . . . . . . . . . . . <0.013%

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

• OFF-isolation (100kHz) . . . . . . . . . . . . . . . . . . . . . . 95dB

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

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

• Available in µTQFN and TDFN Packages

• Compliant with USB 2.0 Short Circuit Requirements

Without Additional External Components

• Pb-Free (RoHS Compliant)

Applications

• MP3 and other Personal Media Players

• Cellular/Mobile Phones

•PDAs

• Audio/USB Switching

Application Block Diagram

ISL54213

USB

TRANSCEIVER

AUDIO

USB/HEADPHONE

COM -

COM +

GND

D-

D+

VDD

CTRL

LOGIC CONTROL

µCONTROLLER

4MΩ

CODEC

VBUS

3.3V

50kΩ50kΩ

4MΩ

JACK

Data Sheet March 26, 2008

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.

2FN6663.0

March 26, 2008

Pinouts (Note 1)

ISL54213

(10 LD 2.1mmx1.6mm µTQFN)

TOP VIEW

ISL54213

(10 LD 3.0mmx3.0mm TDFN)

TOP VIEW

NOTE:

1. ISL54213 Switches Shown for IN = Logic “0” and CTRL = Logic “1”.

D-

COM - L

CTRL

8D+

COM + R

GND

VDD LOGIC

CONTROL

50k

D-

COM -

8D+

COM +

VDD 1

GND

10 CTRL

LOGIC

CONTROL

50k

Truth Table

ISL54213

IN CTRL L, R D+, D-

00OFFOFF

0 1 ON OFF

1XOFFON

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

with 2.7V to 3.6V Supply.

Pin Descriptions

NUMBER NAME FUNCTION

1 VDD Power Supply

2 IN Digital Control Input

3 COM- Voice and Data Common Pin

4 COM+ Voice and Data Common Pin

5 GND Ground Connection

6 R Audio Right Input

7 L Audio Left Input

8 D+ USB Differential Input

9 D- USB Differential Input

10 CTRL Digital Control Input (Audio Enable)

Ordering Information

PART

NUMBER PART

MARKING

TEMP.

RANGE

(°C) PACKAGE

(Pb-free) PKG.

DWG. #

ISL54213IRUZ-T

(Notes 3, 4) GH -40 to +85 10 Ld µTQFN L10.2.1x1.6A

ISL54213IRTZ-T

(Notes 2, 4) 4213 -40 to +85 10 Ld TDFN L10.3x3A

ISL54213IRTZ

(Note 2) 4213 -40 to +85 10 Ld TDFN L10.3x3A

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.

3. These Intersil Pb-free plastic packaged products employ special

Pb-free material sets; molding compounds/die attach materials and

NiPdAu plate - e4 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.

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

ISL54213

3FN6663.0

March 26, 2008

Absolute Maximum Ratings Thermal Information

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

Input Voltages

D+, D- (Note 5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 2V to 5.5V

L, R (Note 5) . . . . . . . . . . . . . . . . . . . . . . . - 2V to ((VDD) + 0.3V)

IN, CTRL (Note 5) . . . . . . . . . . . . . . . . . . -0.3V to ((VDD) + 0.3V)

Output Voltages

COM-, COM+ (Note 5) . . . . . . . . . . . . . . . . . . . . . . . . -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)

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

ESD Ratings

Human Body Model. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . >3kV

Machine Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . >250V

Charged Device Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . >2kV

Thermal Resistance (Typical, Notes 6 and 7 )θJA (°C/W) θJC (°C/W)

10 Ld 2.1mmx1.6mm µTQFN Package 154 48.3

10 Ld 3mmx3mm TDFN . . . . . . . . . . . 58 18

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

Operating Co nditions

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

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

result in failures not covered by warranty.

NOTES:

5. Signals on D+, D-, L, R, COM-, COM+, CTRL and IN exceeding VDD or GND by specified amount are clamped. Limit current to maximum current

ratings.

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

Tech Brief TB379.

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

Electrical Specifications - 2.7V to 3.6V Supply Test Conditions: VDD = +3.0V, GND = 0V, VINH = VCTRLH = 1. 4V , VINL = VCTRLL = 0.5V ,

(Note 8), Unless Othe rwise Specified.

PARAMETER TEST CONDITIONS TEMP

(°C) MIN

(Notes 9, 10) TYP MAX

(Notes 9, 10) UNITS

ANALOG SWITCH CHARACTERISTICS

Audio Switches (L, R)

Analog Signal Range, V ANALOG VDD = 3.3V, 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 = 40mA, VL or

VR = -0.85V to 0.85V (see Figure 3, Note 12) +25 - 2.5 2.8 Ω

Full - - 3.5 Ω

rON Matching Between

Channels, ΔrON VDD = 3.0V, IN = 0.5V, CTRL = 1.4V , ICOMx = 40mA , V L or

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

(Notes 12 and 13)

+25 - 0.1 0.25 Ω

Full - - 0.27 Ω

rON Flatness, rFLAT(ON) VDD = 3.0V, IN = 0.5V, CTRL = 1.4V , ICOMx = 40mA, VL or

VR = -0.85V to 0.85V (Notes 11 and 12) +25 - 0.02 0.05 Ω

Full - - 0.07 Ω

ON-resistance, rON VDD = 5.0V, IN = 0V, CTRL = VDD, ICOMx = 40mA, VL or

VR = -0.85V to 0.85V (see Figure 3) 25 - 2.3 - Ω

ON-resistance, rON VDD = 4.2V, IN = 0V, CTRL = VDD, ICOMx = 40mA, VL or

VR = -0.85V to 0.85V (see Figure 3) 25 - 2.35 - Ω

ON-resistance, rON VDD = 2.85V, IN = 0V, CTRL = VDD, ICOMx = 40mA, VL or

VR = -0.85V to 0.85V (see Figure 3) 25 - 2.72 - Ω

Discharge Pull-Down

Resistance, RL, RRVDD = 3.6V, IN = 0V, CTRL = 0V , VL or VR = -0.85V, 0.85V, VD+

and VD- = floating; measure current through the discharge pull-

down resistor and calculate resistance value.

+25 - 65 - kΩ

USB Switches (D+, D-)

Analog Signal Range, V ANALOG VDD = 2.7V to 3.6V, IN = 1.4V, CTRL = 1.4V Full 0 - VDD V

ON-resistance, rON

(High-Speed) VDD = 3.3V, IN = 1.4V, CTRL = 1.4V, ICOMx = 40mA, VD+ or

VD- = 0V to 400mV (see Figure 4, Note 12) 25 - 5.5 6.5 Ω

Full - - 7 Ω

ISL54213

4FN6663.0

March 26, 2008

rON Matching Between

Channels, ΔrON VDD = 3.3V, IN = 1.4V, CTRL = 1.4V, ICOMx = 40mA, VD+ or

VD- = Voltag e at ma x rON (Notes 12 and 13) 25 - 0.05 0.25 Ω

Full - - 0.55 Ω

rON Flatness, rFLAT(ON) VDD = 3.3V, IN = 1.4V, CTRL = 1.4V, ICOMx = 40mA, VD+ or

VD- = 0V to 400mV (Notes 11 and 12) 25 - 0.5 0.55 Ω

Full - - 1.0 Ω

ON-resistance, rON

(Full-Speed) VDD = 3.3V, IN = 1.4V, CTRL = 1.4V, ICOMx = 1mA, VD+ or

VD- = 3.3V (see Figure 4, Note 12) 25 - 25 30 Ω

Full - - 35 Ω

ON-resistance, rON VDD = 5.0V, IN = VDD, CTRL = VDD, ICOMx = 1mA, VD+ or

VD- = 5V (see Figure 4) +25 - 20 - Ω

ON-resistance, rON VDD = 4.2V, IN = VDD, CTRL = VDD, ICOMx = 1mA, VD+ or

VD- = 4.2V (see Figure 4) 25 - 22 - Ω

ON-resistance, rON VDD = 2.85V, IN = VDD, CTRL = VDD, ICOMx = 1mA, VD+ or

VD- = 2.85V (see Figure 4) 25 - 28 - Ω

OFF-Leakage Current,

ID+(OFF) or ID-(OFF) VDD = 3.6V, IN = 0V, CTRL = 3.6V, VCOM- or VCOM+ = 0.5V, 0V,

VD+ or VD- = 0V, 0.5V, VL and VR = float 25 -5 1.5 5 nA

Full -60 - 60 nA

ON-Leakage Current, IDX VDD = 3.6V, IN = VDD, CTRL = 0V or VDD, VD+ or VD- = 2.7V,

VCOM- or VCOM+ = Float, VL and VR = float 25 -11 2.5 11 nA

Full -70 - 70 nA

DYNAMIC CHARACTERISTI CS

USB Turn-ON Time, tON VDD = 3.0V, RL = 50Ω, CL = 10pF (see Figure 1) 25 - 52 - ns

USB Turn-OFF Time, tOFF VDD = 3.0V, RL = 50Ω, CL = 10pF (see Figure 1) 25 - 20 - ns

Audio Turn-ON Time, tON VDD = 3.0V, RL = 50Ω, CL = 10pF (see Figure 1) 25 - 2.5 - μs

Audio Turn-OFF Time, tOFF VDD = 3.0V, RL = 50Ω, CL = 10pF (see Figure 1) 25 - 50 - ns

Break-Before-Make Time Delay,

tDVDD = 3.0V, RL = 50Ω, CL = 10pF (see Figure 2) 25 - 44 - ns

Skew, tSKEW VDD = 3.0V, IN = 3V, CTRL = 3V, RL = 45Ω,

CL = 10pF, tR = tF= 720ps at 480Mbps, (Duty Cycle = 50%)

(see Figure 7)

25 - 50 - ps

Total Jitter, tJVDD =3.0V, IN = 3V, CTRL = 3V, RL = 50Ω,

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

Propagation Delay, tPD VDD = 3.0V, IN = 3V, CTRL = 3V, RL = 45Ω, CL = 10pF

(see Figure 7) 25 - 250 - ps

Audio Crosstalk

R to COM-, L to COM+ VDD = 3.0V , IN = 0V , CTRL = 3.0V , RL = 32Ω, f = 20Hz to 20kHz,

VR or VL = 0.707VRMS (2VP-P) (see Figure 6) 25 - -112 - dB

Crosstalk

(Audio to USB, USB to Audio) VDD = 3.0V, RL = 50Ω, f = 100kHz (see Figure 6) 25 - -95 - dB

OFF-isolation VDD = 3.0V, RL = 50Ω, f = 100kHz 25 - 95 - dB

OFF-isolation VDD = 3.0V, RL = 32Ω, f = 20Hz to 20kHz 25 - 112 - dB

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

VL or VR = 180mVRMS (509mVP-P), RL = 32Ω

25 - 0.013 - %

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

VL or VR = 0.707VRMS (2VP-P), RL = 32Ω

25 - 0.06 - %

USB Switch -3dB Bandwidth Signal = 0dBm, 0.2VDC offset, RL = 50Ω, CL = 5pF 25 - 736 - MHz

D+/D- OFF-capacitance,

CDxOFF f = 1MHz, V DD = 3.0V, IN = 0V, CTRL = 3.0V, VD- or

VD+ = VCOMx = 0V (see Figure 5) 25 - 3 - pF

L/R OFF-capacitance, CLOFF,

CROFF f = 1MHz, VDD = 3.0V, IN = 3.0V, CTRL = 0V or 3V, VL or

VR = VCOMx = 0V (see Figure 5) 25 - 5 - pF

COM ON-capacitance,

CCOMx(ON) f = 1MHz, VDD = 3.0V, IN = 3.0V, CTRL = 0V or 3V, VD- or

VD+ = VCOMx = 0V (see Figure 5) 25 - 8 - pF

Electrical Specifications - 2.7V to 3.6V Supply Test Conditions: VDD = +3.0V , GND = 0V, VINH = VCTRLH = 1.4V , VINL = VCTRLL = 0.5V,

(Note 8), Unless Oth erwise Specified. (Continued)

PARAMETER TEST CONDITIONS TEMP

(°C) MIN

(Notes 9, 10) TYP MAX

(Notes 9, 10) UNITS

ISL54213

5FN6663.0

March 26, 2008

POWER SUPPLY CHARACTERISTICS

Power Supply Range, VDD Full 2.5 5.0 V

Positive Supply Current, IDD

(Audio Mode) VDD = 3.6V, IN = 0V, CTRL = 3.6V 25 - 6 13 µA

Full - - 15 µA

Positive Supply Current, IDD

(USB Mode) VDD = 3.6V, IN = 3.6V, CTRL = 3.6V 25 - 2 4.5 µA

Full - - 5.5 µA

Positive Supply Current, IDD

(Mute State) VDD = 3.6V, IN = 0V, CTRL = 0V 25 - 2 4.5 µA

Full - - 7 µA

Power OFF-current, IDx ICOMx VDD = 0V, VDx = VCOMx = 5.25V, IN = CTRL = Float 25 - 7 - µA

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 = 3.6, CTRL = 0V Full -2 1.1 2 µA

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; measure current through the

internal pull-down resistor and calculat e resistance value. Full - 4 - MΩ

IN Pull-Down Resistor, RIN VDD = 3.6V, IN = 3.6V, CTRL = 3.6V; measure current through

the internal pull-down resisto r and calculat e resistance value. Full - 4 - MΩ

NOTES:

8. Vlogic = Input voltage to perform proper function.

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

10. Parts are 100% tested at +25°C. Temperature limits established by characterization and are not production tested.

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

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

13. 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 L and R or between D+ and D-.

Electrical Specifications - 2.7V to 3.6V Supply Test Conditions: VDD = +3.0V , GND = 0V, VINH = VCTRLH = 1.4V , VINL = VCTRLL = 0.5V,

(Note 8), Unless Oth erwise Specified. (Continued)

PARAMETER TEST CONDITIONS TEMP

(°C) MIN

(Notes 9, 10) TYP MAX

(Notes 9, 10) UNITS

ISL54213

6FN6663.0

March 26, 2008

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

FIGURE 3. AUDIO rON TEST CIRCUIT FIGURE 4. USB rON TEST CIRCUIT

50%

tr < 20ns

tf < 20ns

tOFF

90%

VINH

VINPUT

VINL

tON

LOGIC

INPUT

SWITCH

INPUT

SWITCH

OUTPUT

90%

VOUT

VOUT V(INPUT) RL

RLrON

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

SWITCH

INPUT

VIN

VOUT

RL CL

COMx

AUDIO OR USB

50Ω10pF

GND

VDD C

CTRL

VINPUT

90%

VINH

VINL

LOGIC

INPUT

SWITCH

OUTPUT 0V

VOUT VIN

COMx

RLCL

VOUT

10pF

50W

D- OR D+

L OR R

VDD

GND

VINPUT

CTRL

VDD C

0V OR

L OR R

COMx

GND

VL OR VR

rON = V1/40mA

40mA

Repeat test for all switches.

CTRL

FLOAT

VDD C

VDD

D- OR D+

COMx

GND

VD- OR VD+

rON = V1/40mA

40mA

Repeat test for all switches.

CTRL

ISL54213

7FN6663.0

March 26, 2008

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

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

FIGURE 7. SKEW TEST

Test Circuits and Waveforms (Continued)

VDD C

GND

AUDIO OR USB

COMx

IMPEDANCE

ANALYZER 0V OR VDD

Repeat test for all switches.

CTRL

ANALYZER

VDD C

L OR R

SIGNAL

GENERATOR

RLGND

COMx 32Ω

COMx R OR L

Signal direction through switch is reversed, worst case values

are recorded. Repeat test f or all switches.

CTRL

DIN+

DIN-

OUT+

OUT-

50%

90%

10%

90%

50%

90%

50%

tri

tfitro

tf0

tskew_i

tskew_o

OUT+

COM-

D+

GND

VDD C

D-

COM+

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 through the Switch for Input Signals.

15.8Ω

143Ω

45Ω

CTRL

VDD

ISL54213

8FN6663.0

March 26, 2008

Detailed Description

The ISL54213 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 a tiny µTQFN and TDFN packages for use in MP3

players, PDAs, cellular phone s and other personal media

players.

The part consists of two 2.5Ω audio switches and two 5.5Ω

USB switches. The audio switches can accep t sign als 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.

The ISL54213 was specifically designed for MP3 players,

personal media playe r s and cellular phone app lications that

need to combine the audio headphone jack and the USB

Application Block Diagrams

FIGURE 8. LOGIC CONTROL VIA MICROPROCESSOR

FIGURE 9. LOGIC CONTROL VIA VBUS VOLTAGE FROM COMPUTER OR USB HUB

50kΩ

ISL54213

USB

TRANSCEIVER

HIGH-SPEED

AUDIO

USB/HEADPHONE JACK

COM -

COM +

GND

D-

D+

VDD

CTRL

LOGIC CONTROL µCONTROLLER

4MΩ

CODEC

VBUS

3.3V

50kΩ

4MΩ

ISL54213

USB

TRANSCEIVER

HIGH-SPEED

AUDIO

USB/HEADPHONE JACK

COM -

COM +

GND

D-

D+

VDD

CTRL

LOGIC CONTROL µCONTROLLER

4MΩ

CODEC

VBUS

3.3V

50kΩ

4MΩ

500kΩ

ISL54213

9FN6663.0

March 26, 2008

data connector into a single shared connector, thereby

saving space and component cost. T ypical Application Block

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

The ISL54213 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 ISL54213 also contains a logic co ntrol

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

switches and puts the part into the mute state.

A detailed description of the two types of switches are

provided in the following sections.

Audio Switches

The two audi o sw it ches (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.

Crosstalk between the audio channels is -112dB over the

audio band. Crosstalk between the audio channel and USB

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

off-isolation, 112dB, over the audio band with a 32Ω load.

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

these switches have an extremely low rON resi st ance

variation. They can pass groun d referenced audio signals with

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

into a 32Ω headphone speaker loa d. See Figures 1 0 and 11.

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).

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

supply, these switches have a nominal rON of 5.5Ω over the

signal range of 0V to 400mV with a rON flatness of 0.5Ω. The

rON matching between the D+ and D- switches over this

signal range is only 0.05Ω ensuring minimal impact by the

switches to USB high speed signal transitions. As the signal

level increases, the rON resistance increases. At signal level

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

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.

The USB switches can also pass USB full-speed sig nals

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

requirements for USB 2.0 full-speed signalin g. See Figure 13

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

The maximum signal range for the USB switches is from

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

allow to exceed the VDD voltage rail or go below ground by

more than -1.5V.

The USB switches are active (turned ON) whenever th e IN

voltage is ≥ to 1.4V.

ISL54213 Operation

The following will discuss using the ISL54213 in the Typical

Application Block Diagrams shown in Figures 8 and 9.

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 2.5V to

5.0V.

In a typical USB/Audio application fo r 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 ope ration (12Mbps), it is

recommended that the VDD voltage be ≥2.5V in order to get

a USB data signal level above 2.5V.

LOGIC CONTROL

The state of the ISL54213 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 VDD is in

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

standard µprocessor. The part has three states or modes of

operation. The Audio Mode, USB Mode and Mute Mode.

Refer to the “T ruth Table” on p age 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

microprocessor . The CTRL control pin is only active when IN is

logic “0”.

Logic control voltage levels:

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

IN = Logic “1” (High) when VIN ≥ 1.4V

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

CTRL = Logic “1” (High) when ≥ 1.4V

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

(right) 2.5Ω audio switches are ON and the D- and D+ 5.5Ω

switches are OFF (high impedance).

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 VBUS

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

ISL54213

10 FN6663.0

March 26, 2008

of the ISL54213 low. As long as the CTR L = Logic “1,” the

ISL54213 part will be in the audio mode and the audio

drivers of the media player can drive the headphones and

play music.

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 D- and

D+ 5.5Ω switches are ON and the L and R 2.5Ω audio

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 presence of the 5V VBUS voltage and drive the IN

pin voltage high. The ISL54213 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 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 Mute mode.

Mute Mode

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

will be in the Mute mode. In the Mu te mode, the audio

switches and the USB switches are OFF (high impedance).

In this state the switches have excellent off-isolation (112dB

over the audio band with a 32Ω load) for muting of audio

signals.

USING THE COMPUTER VBUS VOLTAGE TO DRIVE THE

“IN” PIN

Rather than using a microprocessor to control th e IN logic

pin, one can directly drive the IN pin using the VBUS voltage

from the computer or USB hub. See the application block

diagram in Figure 9.

When a headphone or nothing is conne cted at the common

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

putting the ISL54213 in the Audio or Mute 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 or Mute mode,

depending on the condition of the CTRL pin.

Note: The ISL54213 contains an internal diode between the

IN pin and VDD pin. Whenever the IN voltage is greater than

the VDD voltage by more than 0.7V, current will flow through

this diode into the VDD power supply bus. An external series

resistor in the range of 100kΩ to 500kΩ is required at the IN

logic pin to limit the current when driving it with the VBUS

voltage. 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 2.5V to 3.6V. A 500kΩ resistor will

limit the current to 2.76µA and still allow the IN logic voltage

to go to around 3.67V which is will above the required VINH

level of 1.4V. A smaller series resistor can be used but more

current will flow.

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

THD+N (%)

FREQUENCY (Hz)

20 200 2k 20k

RLOAD = 32Ω

VLOAD = 0.707VRMS

0.04

0.05

0.06

0.07

0.08

0.09

0.10

0.11

VDD = 2.6V

VDD = 2.7V VDD = 3.6V

VDD = 3V

THD+N (%)

FREQUENCY (Hz)

20 200 2k 20k

RLOAD = 32Ω

VDD = 3V

0.02

0.04

0.06

0.08

0.10

2VP-P

1VP-P

3VP-P

2.5VP-P

ISL54213

11 FN6663.0

March 26, 2008

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

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

TIME SCALE (0.2ns/DIV)

VOLTAGE SCALE (0.1V/DIV)

ISL54213

12 FN6663.0

March 26, 2008

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

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

TIME SCALE (10ns/DIV)

VOLTAGE SCALE (0.5V/DI V)

VDD = 3.3V

ISL54213

13 FN6663.0

March 26, 2008

FIGURE 14. AUDIO CHANNEL OFF-ISOLA TION vs

FREQUENCY FIGURE 15. OFF-ISOLATION AUDIO SWITCHES

FIGURE 16. FREQUENCY RESPONSE FIGURE 17. OFF-ISOLATION USB SWITCHES

Die Characteristics

SUBSTRATE POTENTIAL (POWERED UP):

GND

TRANSISTOR COUNT:

PROCESS:

Submicron CMOS

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

OFF-ISOLATION (dB)

-140

-65

-135

-130

-125

-120

-115

-110

-105

-100

-95

-90

-85

-80

-75

-70

20 20k50 100 200 500 1k 2k 5k 10k

FREQUENCY (Hz)

RLOAD = 32Ω

VLOAD = 0.707VRMS

FREQUENCY (Hz)

-60

NORMALIZED GAIN (dB)

0.01M 0.1M 1M 500M

-80

-40

-100

-120

-20

10M0.001M 100M

VSIGNAL = 0.2VP-P TO 2VP-P

RL = 50Ω

FREQUENCY (Hz)

-1

NORMALIZED GAIN (dB)

1M 10M 100M 1G

-2

-3

-4

1USB SWITCH

RL = 50Ω

VSIGNAL = 0.2VP-P TO 2VP-P

FREQUENCY (Hz)

-60

NORMALIZED GAIN (dB)

0.01M 0.1M 1M 500M

-80

-40

-100

-120

-20

10M0.001M 100M

VSIGNAL = 0.2VP-P TO 2VP-P

RL = 50Ω

VDCOFFSET = 1.5VDC

ISL54213

14 FN6663.0

March 26, 2008

ISL54213

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 PATTERN

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 righ t s of Inter si l or i t s sub sidi ari es.

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

FN6663.0

March 26, 2008

ISL54213

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.