PI3USB102
USB 2.0 High-Speed (480 Mbps) Signal Switch
Targeted for Battery Powered Applications
Features
• USB 2.0 compliant (high speed and full speed)
• R
ON
is 4.0Ω typical @ V
DD
= 3.0V
• Low bit-to-bit skew
• Low Crosstalk: –33dB @ 480 Mbps
• Off Isolation: –40dB @ 480 Mbps
• Near-Zero propagation delay: 250ps
• Switching speed: 9ns
• Channel On Capacitance: 5.5pF
• V
DD
Operating Range: 2.7V to 4.2V ±10%
• Data pin I/O ESD: 8kV contact
• -0.5dB BW of 300MHz
• I/O pins have over-voltage protection and can tolerate a short
to Vbus as long as resistor/diode is added between 3.3V
power rail and Pericom's V
DD
• Packaging (Pb-free & Green):
10-contact UQFN, 1.4mm x 1.8mm x 0.5mm (ZME10)
10-contact TQFN, 1.3mm x 1.6mm x 0.75mm (ZLE10)
Description
The PI3USB102 is a single differential channel 2:1 multiplexer/de-
multiplexer USB 2.0 Switch. Industry leading advantages include a
propagation delay of less than 250ps, resulting from its low channel
resistance and I/O capacitance. The device multiplexes differential
outputs from a USB Host device to one of two corresponding outputs.
The switch is bidirectional and offers little or no attenuation of the
high-speed signals at the outputs. It is designed for low bit-to-bit
skew, high channel-to-channel noise isolation and is compatible
with various standards, such as High Speed USB 2.0 (480 Mb/s).
The PI3USB102 offers over voltage protection per the USB 2.0
specification. With the chip powered on or off, all I/O pins can
withstand a short to Vbus (5V +/-10%). This feature can only be
offered if a 100-ohm pull up resistor is placed between V
DD
pin
to the power supply.
In situations where Vbus can be as high as 7V, Pericom recommends
changing the resistor value from 100ohm to 200ohm. Pericom can
still support over-voltage protection up to 7V, as long as the 200ohm
resistor is present.
Application
• Routes signals for USB 2.0
• Hand-held devices
Block Diagram
OE
Y+
Y-
M+
Pin Description
SEL
V
DD
9
M-
D+
D-
Y+
10
1
2
3
GND
Y-
OE
8
7
6
D+
D-
5
M+
SEL
4
M-
Truth Table
SEL
X
L
H
OE
H
L
L
Y+
Hi-Z
M+
D+
Y-
Hi-Z
M-
D-
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PS8950C
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PI3USB102
USB 2.0 High-Speed (480 Mbps) Signal Switch
Targeted for Battery Powered Applications
Maximum Ratings
(Above which useful life may be impaired. For user guidelines, not tested.)
Storage Temperature ......................................................–65°C to +150°C
Supply Voltage to Ground Potential .................................–0.5V to +4.6V
DC Input Voltage .................................................................–0.5V to +7V
DC Output Current ........................................................................120mA
Power Dissipation .............................................................................0.5W
Note:
Stresses greater than those listed under MAXIMUM
RATINGS may cause permanent damage to the device. This
is a stress rating only and functional operation of the device
at these or any other conditions above those indicated in the
operational sections of this specification is not implied. Ex-
posure to absolute maximum rating conditions for extended
periods may affect reliability.
DC Electrical Characteristics for USB 2.0 Switching over Operating Range
(T
A
= –40°C to +85°C, V
DD
= 3.0 - 4.4V)
Parameter
V
IH
V
IL
V
IK
I
IH
I
IL
R
ON
R
FLAT(ON)
ΔR
ON
I
OZ
Description
Input HIGH Voltage
Input LOW Voltage
Clamp Diode Voltage
Input HIGH Current
Input LOW Current
Switch On-Resistance
(3)
On-Resistance Flatness
(3)
On-Resistance match from center
ports to any other port
(3)
I/O leakage current when port is
off
Test Conditions
(1)
Guaranteed
HIGH level
V
DD
= 4.2V
V
DD
= 3.3V
Min.
1.8
1.6
0.8
-1.2
±5
±5
4.0
1.5
0.9
2.0
±2
uA
5.0
Ω
uA
V
Typ.
(2)
Max.
Units
Guaranteed HIGH level
V
DD
= Max., I
IK
= –18mA
V
DD
= Max., V
IH
= VDD
V
DD
= Max., V
IL
= GND
V
DD
= Min., -0.4V
≤
V
input
≤
1.0V
,
I
ON
= –40mA
V
DD
= Min., -0.4V
≤
V
input
≤
1.0V,
I
ON
= -40mA
V
DD
= Min., -0.4V
≤
V
input
≤
1.0V,
I
ON
= -40mA
V
DD
= 4.3V, V
input
= 0 to 3.6V,
switch = off, OE = HIGH
Notes:
1. For max. or min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type.
2. V
DD
= 3.0 - 4.4V, T
A
= 25°C ambient and maximum loading.
3. Measured by the voltage drop between D and D
n
pin at indicated current through the Switch On-Resistance is determined by the lower of the
voltages on the two (D, D
n
) pins.
Power Supply Characteristics
(V
DD
= 3.0 - 4.4V)
Parameters
I
CC
Description
Quiescent Power Supply Current
Test Conditions
(1)
V
DD
= Max., OE = GND or V
DD
V
DD
= Max, V
SEL
= 1.3V - 2.1V
Notes:
1. For max. or min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type.
Min.
Typ.
Max.
1
15
Units
uA
uA
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PI3USB102
USB 2.0 High-Speed (480 Mbps) Signal Switch
Targeted for Battery Powered Applications
Capacitance
(T
A
= 25°C, f = 1MHz)
Parameters
(3)
C
IN
C
OFF
C
ON
Description
Input Capacitance
Switch Capacitance, Switch OFF
Switch Capacitance, Switch ON
V
SEL
= 0V
Test Conditions
(1)
Typ.
(2)
2.2
2.4
5.5
Max.
3.2
3.4
7.0
pF
Units
Dynamic Electrical Characteristics Over the Operating Range
Parameters
X
TALK
O
IRR
BW
BW
Description
Crosstalk
OFF Isolation
–3dB Bandwidth
–0.5dB Bandwidth
Test Conditions
R
L
= 50Ω, f = 240 MHz
R
L
= 50Ω
R
L
= 50Ω
Min.
Typ.
(2)
–35
–40
810
300
Max.
Units
dB
MHz
MHz
Notes:
1. For max. or min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Typical values are at V
DD
= 3.3V, T
A
= 25°C ambient and maximum loading.
3. This parameter is determined by device characterization but is not production tested.
Switching Characteristics
Parameters
t
PD
t
PZH
, t
PZL
t
PHZ
, t
PLZ
t
SK
C-C
t
SKb-b
Propagation Delay
(2,3)
Line Enable Time - SEL, OE to D(+/-), M(+/-)
Line Disable Time - SEL, OE to D(+/-), M(+/-)
Output skew, channel-to-channel
(2)
Output skew, bit-to-bit (opposite transition of the same
output (t
PHL
-t
PLH
)
(2)
See Test Circuit for
Electrical Charac-
teristics
0.5
0.5
3.5
7.5
Description
Test Conditions
(1)
Min.
Typ.
0.25
50
9.0
14
20
ps
ns
Max.
Units
Notes:
1. For max. or min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Guaranteed by design.
3. The switch contributes no propagational delay other than the RC delay of the On-Resistance of the switch and the load capacitance. The time
constant for the switch alone is of the order of 0.25ns for 10pF load. Since this time constant is much smaller than the rise/fall times of typical
driving signals, it adds very little propagational delay to the system. Propagational delay of the switch when used in a system is determined by
the driving circuit on the driving side of the switch and its interactions with the load on the driven side.
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PS8950C
11/20/08
PI3USB102
USB 2.0 High-Speed (480 Mbps) Signal Switch
Targeted for Battery Powered Applications
Test Circuit for Dynamic Electrical Characteristics
S1
HP4396B
R1
T1
V
CC
HP11667A
PI3USB102
Test Circuit for Electrical Characteristics
6.0V
V
DD
200-ohm
Pulse
Generator
V
SEL
D.U.T.
R
T
V
OUT
10pF
C
Notes:
C
L
= Load capacitance: includes jig and probe capacitance.
R
T
= Termination resistance: should be equal to Z
OUT
of the Pulse Generator
All input impulses are supplied by generators having the following characteristics: PRR
≤
MHz, Z
O
= 50Ω, t
R
≤
2.5ns, t
F
≤
2.5ns.
The outputs are measured one at a time with on transition per measurement.
Switch Positions
Test
t
PLZ
, t
PZL
t
PHZ
, t
PZH
Prop Delay
Switch
6.0V
GND
Open
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PI3USB102
USB 2.0 High-Speed (480 Mbps) Signal Switch
Targeted for Battery Powered Applications
Switching Waveforms
SEL
1.25V
1.25V
2.5V
0V
3.5V
Input
t
PLH
Output
2.5V
2.5V
2.5V
1.5V
t
PHL
V
OH
2.5V
V
OL
Waveform 2
tPZH
VDD/2
Waveform 1
tPZL
VDD/2
tPHZ
VOH –0.3V
tPLZ
VOL +0.3V
VOH
VOL
VOH
VOL
Voltage Waveforms Propagation Delay Times
Voltage Waveforms Enable and Disable Times
Applications Information
Logic Inputs
The logic control inputs can be driven up to +3.6V regardless of the supply voltage. For example, given a +3.3V supply, the output
enables or select pins may be driven low to 0V and high to 3.6V. Driving IN Rail-to-Rail® minimizes power consumption.
Power Supply Sequencing
Proper power supply sequencing is recommended for all CMOS devices. Always apply V
DD
and GND before applying signals to
input/output or control pins.
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
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