PERICOM PI3USB20LEX

PI3USB20
3.3V, Wide Bandwidth, 4-Channel,
2:1 Mux/DeMux USB 2.0 Switch w/ Single Enable
Features
Description
• RON is 4Ω typical
The PI3USB20 is a 8- to 4-Channel multiplexer/demultiplexer Video
Switch with Hi-Z outputs. Industry leading advantages include a
propagation delay of less than 250ps, resulting from its low channel
resistance and I/O capacitance.
• Low bit-to-bit skew: 200ps
• Low Crosstalk: –27dB @ 250MHz
• Near-Zero propagation delay: 250ps
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-tochannel noise isolation and is compatible with various standards,
such as high speed USB 2.0 (480 Mb/s).
• Switching speed: 9ns
• Channel On-Capacitance: 6pF (typical)
• VCC Operating Range: +3.0V to +3.6V
• ESD>2000V . . . Human Body Model
• >500 MHz bandwidth (or data frequency)
• Package (Pb-free & Green available):
-16-pin, 173-mil wide plastic TSSOP (L)
Application
• Routes signals for USB 2.0
Pin Description
Block Diagram
Y0
0I0
Y1
1I0
0I1
1I1
Y2
2I0
Y3
3I0
2I1
3I1
SEL
VDD
1
16
0l0
GND
2
15
1I0
Y0
3
14
0I1
Y1
4
13
1I1
Y2
5
12
2 I0
Y3
6
11
3I0
GND
7
10
2I1
SEL
8
9
3I1
Truth Table
Function
SEL
Yn to nI0
L
Yn to nI1
H
1
PS8697B
02/01/05
PI3USB20
3.3V, Wide Bandwidth, 4-Channel,
2:1 Mux/DeMux USB 2.0 Switch
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 +4.0V
DC Input Voltage ................................................. –0.5V to +5.5V
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. Exposure to absolute maximum rating
conditions for extended periods may affect reliability.
DC Electrical Characteristics for USB 2.0 Switching over Operating Range
(TA = –40°C to +85°C, VCC = 3.3V ±10%)
Paramenter
Test
Conditions
Description
Min.
Typ.(2)
Max.
Units
0.8
V
VIH
Input HIGH Voltage
Guaranteed HIGH level
VIL
Input LOW Voltage
Guaranteed HIGH level
VIK
Clamp Diode Voltage
VCC = Max., IIN = –18mA
IIH
Input HIGH Current
VCC = Max., VIN = VCC
±5
IIL
Input LOW Current
VCC = Max., VIN = GND
±5
RON
Switch On-Resistance(3)
VCC = Min., 1.25V ≤ VIN ≤ VCC,
IIN = –40mA
RFLAT(ON)
On-Resistance Flatness(4)
VCC = Min., VIN @ 1.5V and VCC,
IIN = -40mA
1.0
On-Resistance match from center
ports to any other port(4)
VCC = Min., 1.5V ≤ VIN ≤ VCC,
IIN = -40mA
0.9
ΔRON
2.0
-0.7
-1.2
4
μA
8
Ω
2
Capacitance (TA = 25°C, f = 1MHz)
Parameters(4)
Description
CIN
Input Capacitance
COFF
Port I Capacitance, Switch OFF
CON
Switch Capacitance, Switch ON
Test Conditions
VIN = 0V
Typ.
Max.
2.0
3.0
4.0
6.0
6.0
10.0
Units
pF
Notes:
1. For max. or min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Typical values are at VCC = 3.3V, TA = 25°C ambient and maximum loading.
3. Measured by the voltage drop between A and B pins at indicated current through the switch. On-Resistance is determined by the lower of the
voltages on the two (A & B) pins.
4. This parameter is determined by device characterization but is not production tested.
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PS8697B
02/01/05
PI3USB20
3.3V, Wide Bandwidth, 4-Channel,
2:1 Mux/DeMux USB 2.0 Switch
Power Supply Characteristics
Parameters
Description
Test Conditions (1)
ICC
Quiescent Power Supply Current
VCC = Max., VIN = GND or VCC
Typ. (2)
Min.
Max.
Units
800
µA
Notes:
1. For max. or min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Typical values are at VCC = 3.3V, TA = 25C ambient and maximum loading.
3. Per TTL driven input (control inputs only); A and B pins do not contribute to ICC.
Dynamic Electrical Characteristics Over the Operating Range
(TA = –40°C to +85°C, VCC = 3.3V ±10%, GND = 0V)
Parameters
Description
XTALK
Crosstalk
OIRR
OFF Isolation
BW
Bandwidth -3dB
Test Conditions
Min.
Typ.(1)
Max.
Units
-27
RL = 100Ω, f = 250 MHz
dB
-32
RL = 100Ω
500
MHz
Switching Characteristics
Parameters
tPD
Test
Conditions
Description
Min.
Propagation Delay(2,3)
Typ.(1)
Max.
Units
0.25
tPZH, tPZL
Line Enable Time - SEL to YN, NI0, IN
0.5
15.0
tPHZ, tPLZ
Line Disable Time - SEL to YN, NI0, IN
0.5
9.0
port(2)
tSK(o)
Output Skew between center port to any other
tSK(p)
Skew between opposite transitions of the same output (tPHL
- tPLH) (2)
0.1
0.2
0.1
0.2
ns
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 bus 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 bus 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.
3
PS8697B
02/01/05
PI3USB20
3.3V, Wide Bandwidth, 4-Channel,
2:1 Mux/DeMux USB 2.0 Switch
Test Circuit for Electrical Characteristics(1)
6.0V
VCC
200-ohm
Pulse
Generator
VIN
D.U.T
VOUT
10pF
CL
RT
200-ohm
Notes:
1. CL = Load capacitance: includes jig and probe capacitance.
2. RT = Termination resistance: should be equal to ZOUT of the Pulse Generator
3. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control.
Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control.
4. All input impulses are supplied by generators having the following characteristics: PRR ≤ MHz, ZO = 50Ω, tR ≤ 2.5ns, tF ≤ 2.5ns.
5. The outputs are measured one at a time with on transition per measurement.
Switch Positions
Test
Switch
tPLZ, tPZL (output on I-side)
6.0V
tPHZ, tPZH (output on I-side)
GND
Prop Delay
Open
Test Circuit for Dynamic Electrical Characteristics
HP4195A
S1
VCC
R1
T1
PI3USB20
HP11667A
10pF
4
50-ohm
PS8697B
02/01/05
PI3USB20
3.3V, Wide Bandwidth, 4-Channel,
2:1 Mux/DeMux USB 2.0 Switch
Switching Waveforms
2.5V
SEL
1.25V
3.5V
2.5V
Input
0V
2.5V
tPLH
tPHL
1.5V
Output
2.5V
tPZL
tPLZ
VOH
VDD/2
VOH
Output
1.25V
tPZH
2.5V
VOL
VOL +0.3V
tPHZ
VOH –0.3V
VDD/2
VOH
VOL
Output
Voltage Waveforms Propagation Delay Times
VOL
Voltage Waveforms Enable and Disable Times
3.5V
2.5V
Data In
tPLHX
3.5V
1.5V
tPHLX
2.5V
Data Out
at Channel X
I
tSK(o)
tPLH
1.5V
tPHL
VOH
VOL
2.5V
Output
VOH
VOL
2.5V
Data Out
at Channel Y
2.5V
Input
VOH
tSK(p) = I tPHL – tPLH I
VOL
tPLHy
tPHLy
tSK(o) = I tPLHy – tPLHx I or I tPHLy – tPHLx I
Output Skew - tSK(o)
Pulse Skew - tSK(p)
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 advised for all CMOS devices. It is recommended to always apply VCC before applying signals
to the input/output or control pins.
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd
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PS8697B
02/01/05
PI3USB20
3.3V, Wide Bandwidth, 4-Channel,
2:1 Mux/DeMux USB 2.0 Switch
Package Mechanical: 16-pin TSSOP (L)
16
.169
.177
1
4.3
4.5
.193
.201
4.9
5.1
.004
.008
.047
max.
1.20
0.45 .018
0.75 .030
SEATING
PLANE
.0256
BSC
0.65
.007
.012
.002
.006
0.09
0.20
.252
BSC
6.4
0.05
0.15
0.19
0.30
Ordering Information
Ordering Code
Package Code
Package Description
PI3USB20L
L
16-pin TSSOP
PI3USB20LE
L
Pb-free & Green, 16-pin TSSOP
Notes:
1. Thermal characteristics can be found on the company web site at www.pericom.com/packaging/
Pericom Semiconductor Corporation • 1-800-435-2336 • www.pericom.com
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PS8697B
02/01/05