DATASHEET
HYBRID SWITCH WITH NEGATIVE SIGNAL HANDLING
IDTHS221P10
Description
The IDTHS221P10 is a high-performance hybrid switch
device, combined with hybrid low distortion audio and USB
2.0 high speed data (480 Mbps) signal switches, and
analog switches. When operated with a 1.8 V single supply,
this high performance switch allows audio signal swings
below-ground, allowing the use of a common USB and
audio headphone connector in personal media players and
other portable battery powered devices.
The IDTHS221P10 logic SEL control pin is 1.8 V
compatible which allows for control via a standard
µcontroller. With a VDD voltage in the range of 1.7 V to 1.95
V, the device can pass USB 3 V signal sources in the
portable device, with up to 5.5 V tolerant on USB and COM
signal pins. The part has an audio enable control pin to
open all the switches and put the part in a low power state.
The IDTHS221P10 is available in a small 10-pin µMLP
package.
Features
•
+1.7 V to +1.95 V single-supply operation (VDDx)
•
Low distortion negative signal handling capability with
Ron less than 2 ohm for Audio signal
•
•
•
•
•
Control pin to open all switches and enter low power state
Cross-talk audio channels (20 Hz to 20 kHz): -110dB
-3dB bandwidth USB switches: 700 MHz
Available in µMLP packages – RoHS compliant
Compliant with USB 2.0 short circuit requirements
without additional external components
•
Power off protection on common D+/R, D-/L ports
Applications
•
•
•
•
MP3 and other personal media players
PDA’s
Audio/USB Switching
Cellular and mobile phones
Block Diagram
SEL
Control
Circuit
D+
COM+
R
D-
COM-
L
R
COM-
R
COM+
VDDD
VDDA
GND
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IDTHS221P10 REV F 112108
IDTHS221P10
HYBRID SWITCH WITH NEGATIVE SIGNAL HANDLING
HYBRID SWITCH
Pin Assignment
(10-pin µMLP)
COM+
SEL
VDDD
D+
D-
R
COM-
VDDA
GND
L
Truth Table (COM+, COM-)
SEL
0
1
COM+
R
D+
COM-
L
D-
Pin Descriptions
Pin Number Pin Name
1
2
3
4
5
6
7
8
9
10
D-
R
L
GND
VDDA
COM-
COM+
SEL
VDDD
D+
Pin Description
3 V USB Signal. Bi-directional.
Audio signal pin (right). Uni-directional. ±1.5 V signal.
Audio signal pin (left). Uni-directional. ±1.5 V signal.
Ground pin. 0V reference.
Power pin for Audio R/L signal. +1.8 V VDD.
Audio and USB signal common pin. Bi-direction in USB mode,
uni-directional in Audio mode.
Audio and USB signal common pin. Bi-direction in USB mode,
uni-directional in Audio mode
Control signal pin. Internal pull-down resistor.
Power pin for USB. +1.8 V VDD.
3 V USB Signal. Bi-directional.
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HYBRID SWITCH
Detailed Description
The IDTHS221P10 device is a dual single pole/double throw
(SPDT) high performance switch device that can operate
from a single DC power supply in the range of 1.7 V to 1.95
V. 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 µMLP packages for
use in cell phones, MP3 players, PDAs, and other personal
media players.
The part consists of one hybrid dual 2Ω audio and 5Ω USB
switches. The hybrid switch can accept audio signals that
swing below ground and USB signals. They were designed
to pass audio left and right stereo signals, and 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 IDTHS221P10 was specifically designed for cell
phones and other personal media player applications that
need to combine the audio headphone jack and the USB
data connector into a single shared connector, thereby
saving space and component cost.
The IDTHS221P10 has a SEL pin that select between the
audio switches and the USB switches. This pin can be
driven LOW or HIGH to switch between the audio inputs and
USB data inputs.
switches that were designed to pass high-speed USB
differential signals in the range of ±0V to 400 mV. These
switches have low capacitance and high bandwidth to pass
USB high-speed signals (480 Mbps) with minimum edge
and phase distortion to meet USB 2.0 high-speed signal
quality specifications.
The maximum signal range for the USB switches is from 0V
to 3.6 V. The signal voltage at D- and D+ should not be allow
to exceed the 3.6 voltage rail or go below ground.
The USB switches are active (turned ON) whenever the SEL
voltage is >1.2 V.
Note:
Whenever the USB switches are ON the audio drivers
of the CODEC need to be at AC or DC ground or floating to
keep from interfering with the data transmission.
Logic Control
The state of the IDTHS221P10 device is determined by the
voltage at the SEL pin. Refer to truth table on page 2 of data
sheet. These logic pins are 1.8 V logic compatible, and can
be controlled by a standard µprocessor.
The SEL pin is internally pulled low through a 4MΩ resistor
to ground and can be left floating or tri-stated by the
µprocessor.
Logic control voltage levels:
SEL = Logic “0” (Low) when <0.5 V
SEL = Logic “1” (High) when >1.2 V
Audio Switches
The two audio switches (L, R) are 2Ω¸ switches that can
pass signals that swing below ground by as much as 1.5 V.
They were designed to pass ground reference stereo
signals with minimal insertion loss and very low distortion.
Crosstalk between the audio switches over the audio band
is typically < -110dB.
These audio switches are uni-directional switches. The
audio drivers should be connected at the L and R side of the
switch and the speaker loads should be connected at the
COM side of the switch. The audio switches are active
(turned ON) whenever the SEL voltage to <0.5 V.
Note:
Whenever the audio switches are ON the USB
transceivers need to be in the high impedance state or static
high or low state.
USB Switches
The two USB switches (D+, D-) are 5Ω¸ bidirectional
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IDTHS221P10
HYBRID SWITCH WITH NEGATIVE SIGNAL HANDLING
HYBRID SWITCH
Absolute Maximum Ratings
Stresses above the ratings listed below can cause permanent damage to the IDTHS221P10. These ratings, which
are standard values for IDT commercially rated parts, are stress ratings only. Functional operation of the device at
these or any other conditions above those indicated in the operational sections of the specifications is not implied.
Exposure to absolute maximum rating conditions for extended periods can affect product reliability. Electrical
parameters are guaranteed only over the recommended operating temperature range.
Item
VDD to GND
Ambient Operating Temperature Range
Continuous Current (audio switches)
Peak Current (audio switches)
Pulsed 1 ms, 10% duty cycle max.
Continuous Current (USB switches)
Peak Current (USB switches)
Pulsed 1 ms, 10% duty cycle max.
Voltages
Switch I/O Voltage - D+, D-, COM+, COM- (see note below)
Switch I/O Voltage - L, R (see note below)
SELx (see note below)
ESD Rating
HBM
MM
CDM
>8 kV
>400 V
>1 kV
Rating
-0.3 V to 6.0 V
-40°C to +85°C
±150 mA
±300 mA
±40 mA
±100 mA
-0.3 V to +6 V
-2 V to +2 V
-0.3 V to [(VDD) + 0.3 V]
Note:
These specifications are for absolute maximum rating. Not recommended for typical operation.
Recommended Operating Conditions
1
Symbol
V
CC
V
IN
Supply Voltage
DC Switch Voltage
DC Input Diode Current
Storage Temperature
Parameter
0V to V
DD
0V to V
DD
Rating
1.7 V to 1.95 V
-40°C to +85°C
Note 1: The input and output negative voltage ratings may be exceeded if the input and output diode current ratings
are observed. DC switch voltage may never exceed 1.95 V.
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IDTHS221P10 REV F 112108
IDTHS221P10
HYBRID SWITCH WITH NEGATIVE SIGNAL HANDLING
HYBRID SWITCH
Electrical Characteristics – 1.7 V to 1.95 V Supply
Unless stated otherwise,
VDD =1.7 V to 1.95 V, GND = 0V
Parameter
Symbol
Conditions
Min.
Typ.
Max.
Units
Audio Switches (L, R)
Audio Signal Range
On-Resistance
R
ON
Matching Between
Channels
R
ON
Flatness
Discharge Pull-down
Resistance
V
ANALOG
R
ON
R
ON
-1.5
2
0.2
1.5
V
Ω
Ω
R
FLAT(ON)
R
COM+,
R
COM-
V
ANALOG
R
ON
R
ON
R
FLAT(ON)
I
D+(OFF)
or
I
D-(OFF)
I
Dx
POP discharge pull-down resistor
1.5
10
Ω
kΩ
USB Switches (D+, D-)
USB Signal Range
On-Resistance
R
ON
Matching Between
Channels
R
ON
Flatness
OFF-leakage Current
ON-leakage Current
0
5
0.1
1.5
±50
±50
3.6
V
Ω
Ω
Ω
nA
nA
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IDTHS221P10 REV F 112108
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