DATASHEET

ISL54215
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TERSIL
1-888-IN
FN6815.0
MP3/USB 2.0 High Speed Switch with
Negative Signal Handling and Low Power
Shutdown
Features
The Intersil ISL54215 dual SPDT (Single Pole/Double Throw)
switch combines low distortion audio and accurate USB 2.0
high speed data (480Mbps) signal switching in the same low
voltage device. When operated with a 2.5V to 5.0V single
supply, this analog switch allows audio signal swings below
ground, allowing for the use of a common USB and audio
headphone connector in Personal Media Players and other
portable battery powered devices.
• Low Distortion Negative Signal Capability
• High Speed (480Mbps) and Full Speed (12Mbps)
Signaling Capability per USB 2.0
• Low Power Shutdown State
• Low Distortion Headphone Audio Signals
- THD+N at 1mW into 32Load . . . . . . . . . . . . <0.013%
• Crosstalk (100kHz) . . . . . . . . . . . . . . . . . . . . . . . . . -95dB
• OFF-Isolation (100kHz) . . . . . . . . . . . . . . . . . . . . . . 95dB
The ISL54215 logic control pins are 1.8V compatible, which
allows for control via a standard microcontroller.
• Single Supply Operation (VDD) . . . . . . . . . . . . 2.5V to 5.0V
The ISL54215 has an audio enable control pin to open all
switches and put the part in a low power state. In this state,
the device draws typically 1nA of current.
• Available in µTQFN Package
The ISL54215 is available in a small 10 Ld 2.1mmx1.6mm
ultra-thin µTQFN package. It operates over a temperature
range of -40°C to +85°C.
• -3dB Bandwidth USB Switch . . . . . . . . . . . . . . . . . 736MHz
• Compliant with USB 2.0 Short Circuit Requirements
Without Additional External Components
• Pb-Free (RoHS Compliant)
Applications
Related Literature
• MP3 and other Personal Media Players
• Technical Brief TB363 “Guidelines for Handling and
Processing Moisture Sensitive Surface Mount Devices
(SMDs)”
• Cellular/Mobile Phones
• PDAs
• Audio/USB Switching
Application Block Diagram
3.3V
VDD
ISL54215
USB/HEADPHONE JACK
IN
VBUS
CTRL
µCONTROLLER
LOGIC CONTROL
4M
4M
D-
COM -
D+
USB
HIGH-SPEED
TRANSCEIVER
COM +
L
R
AUDIO
CODEC
GND
1
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.
Copyright Intersil Americas Inc. 2008. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
2
ISL54215
Pinouts
(Note 1)
CTRL
ISL54215
(10 LD 2.1mmx1.6mm µTQFN)
TOP VIEW
10
VDD
1
IN
2
4M
LOGIC
CONTROL
9 D8 D+
4M
COM -
3
7 L
COM +
4
6 R
GND
5
NOTE:
1. ISL54215 Switches Shown for IN = Logic “0” and CTRL = Logic “1”.
Truth Table
Ordering Information
ISL54215
IN
CTRL
L, R
D+, D-
0
0
OFF
OFF
0
1
ON
OFF
1
X
OFF
ON
IN, CTRL: Logic “0” when  0.5V or Floating, Logic “1” when  1.4V
with 2.7V to 3.6V Supply.
Pin Descriptions
PIN
NUMBER
NAME
1
VDD
2
IN
3
COM-
Voice and Data Common Pin
4
COM+
Voice and Data Common Pin
5
GND
6
R
Audio Right Input
7
L
Audio Left Input
8
D+
USB Differential Input
9
D-
USB Differential Input
10
CTRL
PART
NUMBER
(Note 2)
PART
MARKING
ISL54215IRUZ-T* GR
TEMP.
RANGE
(°C)
PACKAGE
(Pb-Free)
PKG.
DWG. #
-40 to +85 10 Ld µTQFN L10.2.1x1.6A
*Please refer to TB347 for details on reel specifications.
2. These Intersil Pb-free plastic packaged products employ special Pbfree 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.
FUNCTION
Power Supply
Digital Control Input
Ground Connection
Digital Control Input (Audio Enable)
3
December 11, 2008
ISL54215
Absolute Maximum Ratings
Thermal Information
VDD to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 5.5V
Input Voltages
D+, D- (Note 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 2V to 5.5V
L, R (Note 3) . . . . . . . . . . . . . . . . . . . . . . . - 2V to ((VDD) + 0.3V)
IN, CTRL (Note 3) . . . . . . . . . . . . . . . . . . -0.3V to ((VDD) + 0.3V)
Output Voltages
COM-, COM+ (Note 3) . . . . . . . . . . . . . . . . . . . . . . . . -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, I/0 to GND . . . . . . . . . . . . . . . . . . . . . . >4kV
Human Body Model, All Other Pins. . . . . . . . . . . . . . . . . . .>3.5kV
Human Body Model, VDD to GND. . . . . . . . . . . . . . . . . . . . >11kV
Machine Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . >250V
Charged Device Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . >2kV
Thermal Resistance (Typical, Notes 4, 5)
JA (°C/W)
JC (°C/W)
10 Ld 2.1mmx1.6mm µTQFN Package
154
48.3
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 Conditions
Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . -40°C to +85°C
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product reliability and
result in failures not covered by warranty.
NOTES:
3. 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.
4. JA 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.
5. For JC, 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 6), Unless Otherwise Specified.
PARAMETER
TEST CONDITIONS
TEMP
MIN
(°C) (Notes 7, 8) TYP
MAX
(Notes 7, 8) UNITS
ANALOG SWITCH CHARACTERISTICS
Audio Switches (L, R)
Analog Signal Range, VANALOG VDD = 3.3V, IN = 0.5V, CTRL = 1.4V
ON-Resistance, rON
VDD = 3.0V, IN = 0.5V, CTRL = 1.4V, ICOMx = 40mA, VL or
VR = -0.85V to 0.85V (Figure 3, Note 10)
rON Matching Between
Channels, rON
VDD = 3.0V, IN = 0.5V, CTRL = 1.4V, ICOMx = 40mA, VL or
VR = Voltage at max rON over signal range of -0.85V to 0.85V
(Notes 10, 11)
rON Flatness, rFLAT(ON)
VDD = 3.0V, IN = 0.5V, CTRL = 1.4V, ICOMx = 40mA, VL or
VR = -0.85V to 0.85V (Notes 9, 10)
Full
-1.5
-
1.5
V
25
-
2.5
2.8

Full
-
-
3.4

25
-
0.09
0.25

Full
-
-
0.26

25
-
0.02
0.05

Full
-
-
0.07

ON-Resistance, rON
VDD = 5.0V, IN = 0V, CTRL = VDD, ICOMx = 40mA, VL or
VR = -0.85V to 0.85V (Figure 3)
25
-
2.3
-

ON-Resistance, rON
VDD = 4.2V, IN = 0V, CTRL = VDD, ICOMx = 40mA, VL or
VR = -0.85V to 0.85V (Figure 3)
25
-
2.35
-

ON-Resistance, rON
VDD = 2.85V, IN = 0V, CTRL = VDD, ICOMx = 40mA, VL or
VR = -0.85V to 0.85V (Figure 3)
25
-
2.72
-

Full
0
-
VDD
V
25
-
5
6.5

Full
-
-
7

USB Switches (D+, D-)
Analog Signal Range, VANALOG VDD = 2.7V to 3.6V, IN = 1.4V, CTRL = 1.4V
ON-Resistance, rON
(High-Speed)
VDD = 3.3V, IN = 1.4V, CTRL = 1.4V, ICOMx = 40mA, VD+ or
VD- = 0V to 400mV (Figure 4, Note 10)
4
December 11, 2008
ISL54215
Electrical Specifications - 2.7V to 3.6V Supply Test Conditions: VDD = +3.0V, GND = 0V, VINH = VCTRLH = 1.4V, VINL = VCTRLL =
0.5V, (Note 6), Unless Otherwise Specified. (Continued)
PARAMETER
TEST CONDITIONS
TEMP
MIN
(°C) (Notes 7, 8)
TYP
MAX
(Notes 7, 8) UNITS
rON Matching Between
Channels, rON
(High-Speed)
VDD = 3.3V, IN = 1.4V, CTRL = 1.4V, ICOMx = 40mA, VD+ or
VD- = Voltage at max rON (Notes 10, 11)
25
-
0.05
0.25

Full
-
-
0.55

rON Flatness, rFLAT(ON)
(High-Speed)
VDD = 3.3V, IN = 1.4V, CTRL = 1.4V, ICOMx = 40mA, VD+ or
VD- = 0V to 400mV (Notes 9, 10)
25
-
0.45
0.55

Full
-
-
1.0

ON-Resistance, rON
(Full-Speed)
VDD = 3.3V, IN = 1.4V, CTRL = 1.4V, ICOMx = 1mA, VD+ or
VD- = 3.3V (Figure 4, Note 10)
25
-
25
30

Full
-
-
35

ON-Resistance, rON
VDD = 5.0V, IN = VDD, CTRL = VDD, ICOMx = 1mA, VD+ or
VD- = 5V (Figure 4)
25
-
20
-

ON-Resistance, rON
VDD = 4.2V, IN = VDD, CTRL = VDD, ICOMx = 1mA, VD+ or
VD- = 4.2V (Figure 4)
25
-
22
-

ON-Resistance, rON
VDD = 2.85V, IN = VDD, CTRL = VDD, ICOMx = 1mA, VD+ or
VD- = 2.85V (Figure 4)
25
-
28
-

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
0.5
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
-10
2
10
nA
Full
-70
-
70
nA
DYNAMIC CHARACTERISTICS
USB Turn-ON Time, tON
VDD = 3.0V, RL = 50, CL = 10pF (Figure 1)
25
-
30
-
ns
USB Turn-OFF Time, tOFF
VDD = 3.0V, RL = 50, CL = 10pF (Figure 1)
25
-
20
-
ns
Audio Turn-ON Time, tON
VDD = 3.0V, RL = 50, CL = 10pF (Figure 1)
25
-
2.5
-
µs
Audio Turn-OFF Time, tOFF
VDD = 3.0V, RL = 50, CL = 10pF (Figure 1)
25
-
30
-
ns
Break-Before-Make Time Delay, VDD = 3.0V, RL = 50, CL = 10pF (Figure 2)
tD
25
-
13
-
ns
Skew, (tSKEWOUT - tSKEWIN)
VDD = 3.0V, IN = 3V, CTRL = 3V, RL = 45,
CL = 10pF,tR = tF = 720ps at 480Mbps, (Duty Cycle = 50%)
(Figure 7)
25
-
50
-
ps
Total Jitter, tJ
VDD =3.0V, IN = 3V, CTRL = 3V, RL = 45,
CL = 10pF,tR = tF = 750ps at 480Mbps
25
-
210
-
ps
Propagation Delay, tPD
VDD = 3.0V, IN = 3V, CTRL = 3V, RL = 45,CL = 10pF
Figure 7)
25
-
250
-
ps
Audio Crosstalk
R to COM-, L to COM+
VDD = 3.0V, IN = 0V, CTRL = 3.0V, RL = 32, f = 20Hz to 20kHz,
VR or VL = 0.707VRMS (2VP-P) (Figure 6)
25
-
-100
-
dB
Crosstalk
(Audio to USB, USB to Audio)
VDD = 3.0V, RL = 50, f = 100kHz (Figure 6)
25
-
-95
-
dB
OFF-Isolation
VDD = 3.0V, RL = 50, f = 100kHz
25
-
95
-
dB
OFF-Isolation
VDD = 3.0V, RL = 32, f = 20Hz to 20kHz
25
-
115
-
dB
Total Harmonic Distortion
f = 20Hz to 20kHz, VDD = 3.0V, IN = 0V, CTRL = 3.0V,
VL or VR = 180mVRMS (509mVP-P), RL = 32
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 = 32
25
-
0.05
-
%
USB Switch -3dB Bandwidth
Signal = 0dBm, 0.2VDC offset, RL = 50,CL = 5pF
25
-
736
-
MHz
D+/D- OFF-Capacitance,
CDxOFF
f = 1MHz, VDD = 3.0V, IN = 0V, CTRL = 3.0V, VD- or
VD+ = VCOMx = 0V (Figure 5)
25
-
3
-
pF
25
-
5
-
pF
L/R OFF-Capacitance, CLOFF, f = 1MHz, VDD = 3.0V, IN = 3.0V, CTRL = 0V or 3V, VL or
CROFF
VR = VCOMx = 0V (Figure 5)
5
December 11, 2008
ISL54215
Electrical Specifications - 2.7V to 3.6V Supply Test Conditions: VDD = +3.0V, GND = 0V, VINH = VCTRLH = 1.4V, VINL = VCTRLL =
0.5V, (Note 6), Unless Otherwise Specified. (Continued)
PARAMETER
COM ON-Capacitance,
CCOMx(ON)
TEST CONDITIONS
f = 1MHz, VDD = 3.0V, IN = 3.0V, CTRL = 0V or 3V, VD- or
VD+ = VCOMx = 0V (Figure 5)
TEMP
MIN
(°C) (Notes 7, 8)
25
-
Full
2.5
TYP
7
MAX
(Notes 7, 8) UNITS
-
pF
5.0
V
POWER SUPPLY CHARACTERISTICS
Power Supply Range, VDD
Positive Supply Current, IDD
Positive Supply Current, IDD
(Low Power State)
VDD = 3.6V, IN = 0V or 3.6V, CTRL = 3.6V
VDD = 3.6V, IN = 0V, CTRL = 0V or float
Power OFF-Current, IDx ICOMx VDD = 0V, VDx = VCOMx = 5.25V, IN = CTRL = Float
25
-
7
13
µA
Full
-
-
15
µA
25
-
1
10
nA
Full
-
-
150
nA
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
0.9
2
µA
Input Current, ICTRLH
VDD = 3.6V, IN = 0V, CTRL = 3.6V
Full
-2
0.9
2
µA
CTRL Pull-Down Resistor,
RCTRL
VDD = 3.6V, IN = 0V, CTRL = 3.6V; measure current through the
internal pull-down resistor and calculate resistance value.
Full
-
4
-
M
IN Pull-Down Resistor, RIN
VDD = 3.6V, IN = 3.6V, CTRL = 3.6V; measure current through
the internal pull-down resistor and calculate resistance value.
Full
-
4
-
M
NOTES:
6. Vlogic = Input voltage to perform proper function.
7. The algebraic convention, whereby the most negative value is a minimum and the most positive a maximum, is used in this data sheet.
8. Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise specified. Temperature limits established by characterization
and are not production tested.
9. Flatness is defined as the difference between maximum and minimum value of ON-resistance over the specified analog signal range.
10. Limits established by characterization and are not production tested.
11. 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-.
6
December 11, 2008
ISL54215
Test Circuits and Waveforms
VINH
LOGIC
INPUT
50%
VINL
VINPUT
tOFF
SWITCH
INPUT VINPUT
SWITCH
INPUT
CTRL
VOUT
AUDIO OR USB
COMx
IN
VOUT
90%
90%
SWITCH
OUTPUT
C
VDD
tr < 20ns
tf < 20ns
VIN
CL
10pF
RL
50
GND
0V
tON
Logic input waveform is inverted for switches that have the opposite
logic sense.
Repeat test for all switches. CL includes fixture and stray
capacitance.
RL
V OUT = V (INPUT) -----------------------R L + r ON
FIGURE 1A. MEASUREMENT POINTS
FIGURE 1B. TEST CIRCUIT
FIGURE 1. SWITCHING TIMES
VDD
LOGIC
INPUT
CTRL
VINH
D- OR D+
VINPUT
90%
0V
CL
10pF
RL
50
IN
VOUT
VOUT
COMx
L OR R
VINL
SWITCH
OUTPUT
C
GND
VIN
tD
Repeat test for all switches. CL includes fixture and stray capacitance.
FIGURE 2B. TEST CIRCUIT
FIGURE 2A. MEASUREMENT POINTS
FIGURE 2. BREAK-BEFORE-MAKE TIME
VDD
VDD
C
C
rON = V1/40mA
rON = V1/40mA
CTRL
CTRL
D- OR D+
L OR R
VL OR VR
VD- OR VD+
IN 0V OR FLOAT
V1
40mA
40mA
COMx
IN
V1
VDD
COMx
GND
GND
Repeat test for all switches.
Repeat test for all switches.
FIGURE 3. AUDIO rON TEST CIRCUIT
7
FIGURE 4. USB rON TEST CIRCUIT
December 11, 2008
ISL54215
Test Circuits and Waveforms (Continued)
VDD
VDD
C
CTRL
C
CTRL
AUDIO OR USB
SIGNAL
GENERATOR
L OR R
IN
IMPEDANCE
ANALYZER
32
COMx
IN
0V OR VDD
0V
COMx
GND
R OR L
COMx
ANALYZER
NC
GND
RL
Repeat test for all switches.
Signal direction through switch is reversed, worst case values
are recorded. Repeat test for all switches.
FIGURE 6. AUDIO CROSSTALK TEST CIRCUIT
FIGURE 5. CAPACITANCE TEST CIRCUIT
VDD
C
tri
CTRL
90%
DIN+
DIN-
10%
50%
tskew_i
90%
VDD
DIN+
IN
15.8
COM+
143
50%
10%
DIN-
tfi
tro
15.8
OUT+
D+
CL
COM-
OUT-
DCL
143
45
45
90%
OUT+
OUT-
10%
GND
50%
tskew_o
50%
90%
tf0
10%
|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.
FIGURE 7A. MEASUREMENT POINTS
FIGURE 7B. TEST CIRCUIT
FIGURE 7. SKEW TEST
8
December 11, 2008
ISL54215
Typical Application Block Diagrams
3.3V
VDD
ISL54215
USB/HEADPHONE JACK
IN
CTRL
µCONTROLLER
LOGIC CONTROL
VBUS
4M
4M
D-
COM -
D+
USB
HIGH-SPEED
TRANSCEIVER
COM +
L
AUDIO
CODEC
R
GND
FIGURE 8. LOGIC CONTROL VIA MICROPROCESSOR
3.3V
VDD
ISL54215
USB/HEADPHONE JACK
IN
LOGIC CONTROL
VBUS
500k
4M
CTRL
µCONTROLLER
4M
D-
COM -
D+
USB
HIGH-SPEED
TRANSCEIVER
COM +
L
R
AUDIO
CODEC
GND
FIGURE 9. LOGIC CONTROL VIA VBUS VOLTAGE FROM COMPUTER OR USB HUB
Detailed Description
The ISL54215 device is a dual single pole/double throw
(SPDT) analog switch that operates from a single DC power
supply in the range of 2.5V to 5.0V. It was designed to
function as a dual 2 to 1 multiplexer to select between USB
differential data signals and audio L and R stereo signals. It
comes in tiny µTQFN package for use in MP3 players,
PDAs, cellular phones and other personal media players.
9
The part consists of two 2.5 audio switches and two 5
USB switches. The audio switches can accept signals that
swing below ground. They were designed to pass audio left
and right stereo signals, that are ground referenced, with
minimal distortion. The USB switches were designed to pass
high-speed USB differential data signals with minimal edge
and phase distortion.
The ISL54215 was specifically designed for MP3 players,
personal media players and cellular phone applications that
need to combine the audio headphone jack and the USB
December 11, 2008
ISL54215
data connector into a single shared connector, thereby
saving space and component cost. “Typical Application
Block Diagrams” on page 9 of this functionality are shown in
Figures 8 and 9.
The ISL54215 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 ISL54215 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.
Detailed descriptions of the two types of switches are
provided in the following sections.
Audio Switches
The two audio switches (L, R) are 2.5 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 -100dB over the
audio band. Crosstalk between the audio channel and USB
channel is -95dB at 100kHz. These switches have excellent
OFF-isolation, 115dB, over the audio band with a 32 load.
Over a signal range of ±1V (0.707VRMS) with VDD > 2.7V,
these switches have an extremely low rON resistance
variation. They can pass ground referenced audio signals with
very low distortion (<0.05% THD+N) when delivering 15.6mW
into a 32headphone speaker load. See Figures 10 through
13 for THD+N performance curves.
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 6 and 7) 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 over the
signal range of 0V to 400mV with a rON flatness of 0.45.
The rON matching between the D+ and D- switches over this
signal range is only 0.05 ensuring minimal impact by the
switches to USB high speed signal transitions. As the signal
level increases, the rON resistance increases. At a signal
level of 3.3V, the switch resistance is nominally 25.
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
10
minimum edge and phase distortion to meet USB 2.0 high
speed signal quality specifications. See Figure 14.
The USB switches can also pass USB full-speed signals
(12Mbps) with minimal distortion and meet all the USB
requirements for USB 2.0 full-speed signaling. See Figure 15
for Full-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 D- and D+ should not be
allowed to exceed the VDD voltage rail or go below ground
by more than -1.5V.
The USB switches are active (turned ON) whenever the IN
voltage is  to 1.4V.
ISL54215 Operation
The following will discuss using the ISL54215 in the “Typical
Application Block Diagrams” on page 9 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 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 2.5V in order to get
a USB data signal level above 2.5V.
LOGIC CONTROL
The state of the ISL54215 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 microprocessor. The part has three states or
modes of operation. The Audio Mode, USB Mode and the
Low Power Mode. Refer to the “Truth Table” on page 3.
The IN and CTRL pins are internally pulled low through a
4Mresistor to ground and can be left floating or tri-stated
by the µprocessor. The CTRL control pin is only active when
IN is logic “0”.
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) 2.5 audio switches are ON and the D- and D+ 5
switches are OFF (high impedance).
December 11, 2008
ISL54215
When nothing is plugged into the common connector or a
headphone is plugged into the common connector, the
microprocessor 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 ISL54215 low. As long as CTRL = Logic
“1,” the ISL54215 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 the CTRL pin = Logic “0” or
Logic “1”, the part will go into USB mode. In USB mode, the
D- and D+ 5 switches are ON and the L and R 2.5 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 and drive the IN pin
voltage high. The ISL54215 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 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
audio switches and the USB switches are OFF (high
impedance). In this state, the device draws typically 1nA of
current.
In Low Power mode, the OFF-isolation and crosstalk
between switch cells is minimal for negative swinging
signals. Care should be taken to avoid negative swinging
signals in this mode of operation. In typical applications, the
11
Low Power state will be applied to the ISL54215 part when
the portable media player is in its sleep or hibernate mode to
conserve battery power. In the sleep mode, no audio or USB
signals are applied to the part.
USING THE COMPUTER VBUS VOLTAGE TO DRIVE THE
“IN” PIN
Rather than using a microprocessor to control the IN logic
pin, one can directly drive the IN pin using the 5V VBUS
voltage from the computer or USB hub. See the Application
Block Diagram, Figure 9.
When a headphone or nothing is connected at the common
connector, the internal 4M pull-down will pull the IN pin low,
putting the ISL54215 in the Audio 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 or Low Power
mode, depending on the condition of the CTRL pin.
Note: The ISL54215 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 100k to 500k 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 500k 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.
December 11, 2008
ISL54215
Typical Performance Curves TA = +25°C, Unless Otherwise Specified.
0.020
0.019
RLOAD = 32
PLOAD = 1mWRMS
0.080
VDD = 2.6V
0.075
0.018
RLOAD = 32
VLOAD = 0.707VRMS
VDD = 2.6V
0.070
0.016
0.015
VDD = 2.7V
0.014
0.055
VDD = 3.6V
0.045
VDD = 5V
50
100
200
500 1k
2k
FREQUENCY (Hz)
5k
0.040
20
10k 20k
50
100
200
500
1k
2k
5k
10k 20k
FIGURE 11. THD+N vs SUPPLY VOLTAGE vs FREQUENCY
0.10
0.09
0.08
0.07
RLOAD = 32
VDD = 3V
3VP-P
0.09
VDD = 5V
FREQUENCY (Hz)
FIGURE 10. THD+N vs SUPPLY VOLTAGE vs FREQUENCY
RLOAD = 32
FREQ = 1kHz
VDD = 3V
0.06
0.05
0.07
THD+N (%)
0.08
THD+N (%)
VDD = 3V
VDD = 3.6V
0.011
0.10
VDD = 2.7V
0.050
0.012
0.11
0.060
VDD = 3V
0.013
0.010
20
0.065
THD+N (%)
THD+N (%)
0.017
2.5VP-P
0.06
0.04
0.03
2VP-P
0.05
0.02
0.04
0.03
0.02
20
1VP-P
50
100
200
500
1k
2k
FREQUENCY (Hz)
5k
10k 20k
FIGURE 12. THD+N vs SIGNAL LEVELS vs FREQUENCY
12
0.01
0.5
1.0
1.5
2.0
2.5
3.0
OUTPUT VOLTAGE (VP-P)
FIGURE 13. THD+N vs OUTPUT VOLTAGE
December 11, 2008
ISL54215
VOLTAGE SCALE (0.1V/DIV)
Typical Performance Curves TA = +25°C, Unless Otherwise Specified. (Continued)
TIME SCALE (0.2ns/DIV)
FIGURE 14. EYE PATTERN: 480Mbps WITH USB SWITCHES IN THE SIGNAL PATH
13
December 11, 2008
ISL54215
Typical Performance Curves TA = +25°C, Unless Otherwise Specified. (Continued)
VOLTAGE SCALE (0.5V/DIV.)
VDD = 3.3V
TIME SCALE (10ns/DIV)
FIGURE 15. EYE PATTERN: 12Mbps USB SIGNAL WITH USB SWITCHES IN THE SIGNAL PATH
1
0
USB SWITCH
0
-20
-2
NORMALIZED GAIN (dB)
NORMALIZED GAIN (dB)
-1
-3
-4
RL = 50
10M
100M
FREQUENCY (Hz)
FIGURE 16. FREQUENCY RESPONSE
14
VDCOFFSET = 1.5VDC
-40
-60
-80
-100
VSIGNAL = 0.2VP-P TO 2VP-P
1M
RL = 50
VSIGNAL = 0.2VP-P TO 2VP-P
1G
-120
0.001M
0.01M
0.1M
1M
10M
FREQUENCY (Hz)
100M 500M
FIGURE 17. OFF-ISOLATION USB SWITCHES
December 11, 2008
ISL54215
Typical Performance Curves TA = +25°C, Unless Otherwise Specified. (Continued)
0
NORMALIZED GAIN (dB)
-20
RL = 50
VSIGNAL = 0.2VP-P TO 2VP-P
Die Characteristics
SUBSTRATE POTENTIAL (POWERED UP):
-40
GND
-60
TRANSISTOR COUNT:
98
-80
PROCESS:
Submicron CMOS
-100
-120
0.001M
0.01M
0.1M
1M
10M
100M
500M
FREQUENCY (Hz)
FIGURE 18. OFF-ISOLATION AUDIO SWITCHES
For additional products, see www.intersil.com/en/products.html
Intersil products are manufactured, assembled and tested utilizing ISO9001 quality systems as noted
in the quality certifications found at www.intersil.com/en/support/qualandreliability.html
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
15
December 11, 2008
ISL54215
Ultra Thin Quad Flat No-Lead Plastic Package (UTQFN)
D
6
INDEX AREA
2X
A
L10.2.1x1.6A
B
N
10 LEAD ULTRA THIN QUAD FLAT NO-LEAD PLASTIC
PACKAGE
MILLIMETERS
E
SYMBOL
0.10 C
1
2X
2
0.10 C
TOP VIEW
C
A
SEATING PLANE
1
MAX
0.55
-
A1
-
-
0.05
-
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
-
A1
SIDE VIEW
k
0.20
-
-
L
0.35
0.40
0.45
4xk
2
NX L
N
0.50 BSC
-
NX b
2
Nd
4
3
Ne
1
3
0
-
12
NOTES:
5
BOTTOM VIEW
CL
NX (b)
(A1)
L
5
e
SECTION "C-C"
TERMINAL TIP
C C
4
Rev. 3 6/06
0.10 M C A B
0.05 M C
3
(ND-1) X e
-
10

e
-
N
(DATUM B)
N-1
NOTES
0.50
e
(DATUM A)
PIN #1 ID
NOMINAL
0.45
A3
0.10 C
0.05 C
MIN
A
FOR ODD TERMINAL/SIDE
b
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 within the zone indicated. The pin #1 identifier 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.
2.50
1.75
0.05 MIN
L
2.00
0.80
0.275
0.10 MIN
DETAIL “A” PIN 1 ID
0.25
0.50
LAND PATTERN 10
16
December 11, 2008
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