PI3L100
3.3V, Wide Bandwidth, Quad
2:1 Mux/DeMux LAN Switch
Features
• Replaces Mechanical Relays
• High-performance, Low-cost Solution for switching between
Different LAN Signals
• Ultra-low Quiescent Power (0.1µA typical)
• Low Crosstalk: –100dB @ 10 MHz
• Low Insertion Loss or On-Resistance: 5 typical
• Single Supply Operation: 3.3V ±10%
• Off Isolation: –50dB @ 10 MHz
• Wide-bandwidth data rates >200 MHz
• Packaging (Pb-free & Green available):
– 16-pin 150 mil wide plastic QSOP (Q)
– 16-pin 173 mil wide plastic TSSOP (L)
Description
Pericom Semiconductor’s PI3L100 is a Quad 2:1 multiplexer/
demultiplexer LanSwitch with three-state outputs. This device
can be used for switching between various standards, such as 10
Base-T and 100 Base-T. Generally, this part can be used to replace
mechanical relays in low voltage LAN applications that have physical
layer, unshielded twisted pair media (UTP) with either CAT 3 or
CAT 5 grade cable.
Block Diagram
I
A
0
I
A
1
I
B
0
I
B
1
I
C
0
I
C
1
I
D
0
I
D
1
Pin Configuration
S
E
IA0
IA1
YA
IB0
S
IB1
YB
GND
Y
A
Y
B
Y
C
Y
D
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
VCC
E
ID0
ID1
YD
IC0
IC1
YC
Truth Table
(1)
E
H
L
L
S
X
L
H
YA
Hi-Z
I
A
0
I
A
1
Pin Description
YB
Hi-Z
I
B
0
I
B
1
YC
Hi-Z
O
C
0
I
C
1
YD
Hi-Z
I
D
0
I
D
1
Function
Disable
S=0
S=1
IAn-IDn
S
E
YA-YD
GND
V
CC
Pin Name
Description
Data Inputs
Select Inputs
Enable
Data Outputs
Ground
Power
Note:
1. H = High Voltage Level, L = Low Voltage Level
1
PS8504E
02/02/05
PI3L100
3.3V, Wide Bandwidth, Quad
2:1 Mux/DeMux LAN Switch
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
Storage Temperature .......................................................... –65°C to +150°C
Ambient Temperature with Power Applied ............................. 0°C to +70°C
Supply Voltage to Ground Potential (Inputs & Vcc Only) ... –0.5V to +4.6V
Supply Voltage to Ground Potential (Outputs & D/O Only) –0.5V to +4.6V
DC Input Voltage .................................................................. –0.5V to +4.6V
DC Output Current............................................................................ 120 mA
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
(Over the Operating Range, T
A
= -40°C to +85°C, V
CC
= 3.3V ±5%)
Parameters
V
IH
V
IL
I
IH
I
IL
I
OZH
V
IK
I
OS
V
H
R
ON
∆R
ON
Description
Input HIGH Voltage
Input LOW Voltage
Input HIGH Current
Input LOW Current
High Impedance Output Current
Clamp Diode Voltage
Short Circut Current
(3)
Input Hysteresis atr Control Pins
Switch On-Resistance
On-Resistance Match
V
CC =
Min., V
IN
= 0V, I
ON
= 48mA
V
CC =
Min., V
IN
= 2.4, I
ON
=15mA
V
IN
= 3.0V, E = LOW
Test Conditions
(1)
Min.
2.0
-0.5
Guaranteed Logic HIGH Level
Guaranteed Logic LOW Level
V
CC
= Max., V
IN
= V
CC
V
CC
= Max., V
IN
= GND
0 ≤ A, B ≤ V
CC
V
CC
= Min., I
IN
= -18mA
A (B) = 0V, B (A) = V
CC
100
Typ.
(2)
Max.
0.8
±1
±1
±1
-1.2
Units
V
µA
V
mA
mV
150
5
10
1
7
15
Ω
Notes:
1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for applicable device type.
2. Typical values are at V
CC
= 3.3V,
T
A
= 25°C ambient temperature.
3. Not more than one output should be shorted at one time. Duration of the test should not exceed one second.
Capacitance
(T
A
= 25°C, f = 1 MHz)
Parameters
(1)
C
IN
C
OFF
C
ON
C
OFF
Description
Input Capacitance
Capacitance, Switch Off (Y)
Capacitance, Switch On
Capacitance, Switch Off, (I
N
)
V
IN
= 0V
Test Conditions
Typ.
-
-
-
-
Max.
3
17
25
8
pF
Units
Note:
1. This parameter is determined by device characterization but is not production tested.
2
PS8504E
02/02/05
PI3L100
3.3V, Wide Bandwidth, Quad
2:1 Mux/DeMux LAN Switch
Power Supply Characteristics
Parameters
I
CC
∆I
CC
Description
Quisecent Power Supply
Current
Supply Current per Input
@ TTL HIGH
Supply Current per Input
per MHz
(1)
Test Condidtions
(1)
V
CC
= Max.
V
CC
= Max.
V
CC
=Max.,
Input Pins Open E = GND Control
Input Toggling 50% Duty Cycle
V
IN
= GND or
V
CC
V
IN
= V
CC
-0.6
Min.
Typ.
(2)
0.1
Max. Units
3.0
750
µA
µA
mA/
MHZ
I
CCD
0.25
Notes:
1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device.
2. Typical values are at V
CC
= 3.3V, +25°C ambient.
3. Per TTL driven input (V
IN
= 3.0V,
control inputs only); A and B pins do not contribute to I
CC
.
4. This current applies to the control inputs only and represent the current required to switch internal capacitance at the specified frequency. The
A and B inputs generate no significant AC or DC currents as they transition. This parameter is not tested, but is guaranteed by design.
Switching Characteristics over Operating Range
Paramters
T
PLH
T
PY
T
PHZ
T
PLZ
X
TALK
O
IRR
B
W
t
ON
t
OFF
Description
Propagation Delay
(2, 3)
; In to Y
Bus Enable Time; S to Y
Bus Disable Time; E to Y
Crosstalk
Off Isolation
-3dB Bandwidth
Turn On Time
Turn Off Time
C
L
= 50pf
R
L
= 500Ω
R
L
= 100Ω; f = 30MHz
See Figure 2
R
L
= 100Ω; f = 30MHz
R
L
= 100Ω; See Figure 2
R
L
= 100Ω
C
L
= 35pF, See Figure 1
1.0
1.0
1
1
-90
-45
213
5
5
MHz
ns
Conditions
(1)
Com.
Min.
Typ.
Max.
0.25
4.5
4.5
dB
ns
Units
Notes:
1. See test circuit and waveforms.
2. This parameter is guaranteed but not tested.
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 50pF 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 interaction with the load on the driven side.
3
PS8504E
02/02/05
PI3L100
3.3V, Wide Bandwidth, Quad
2:1 Mux/DeMux LAN Switch
Applications
LAN Switch
The PI3L100 was designed to switch between various stan-
dards such as 10 Base-T, 100 Base-T, 100 VG-Any LAN,
and Token Ring. Also general purpose applications such
as loopback, line termination, and line clamps that might
normally use mechanical relays are also ideal uses for this
LAN Switch (see Figure 4). Generally speaking, this LAN
Switch can be used for data rates to 200 Mbps and data signal
levels from 0V to 3.6V.
LAN Standards
10 Base-T
100 Base-T
100 VG-Any LAN
Data Rate per twisted pair (UTP)
10 Mbps
100 Mbps
25 Mbps
V
CC
Bias Voltage vs. R
ON
To keep R
ON
to a minimum, it is recommended that the V
CC
voltage be increased to a voltage between 3.3V and 3.6V.
Ideally an input voltage between 0.2V and 3.6V will keep
R
ON
flat.
Signal Distortion
Distortion of the input signal is equated to 20 LOG
Δ
R
ON
/R
L
. So keeping R
ON
flat as the data signal level var-
ies is critical to low distortion. It should also be noted that
increasing the data rate increases harmonic distortion which
also effects the signal amplitude.
Test Circuits
3.3V
Vcc
3V
I
N
S
D
75Ω
V
OUT
35pF
DIGITAL
INPUT
ANALOG
OUTPUT
50%
50%
90%
90%
PI3L100
GND
EN
t
ON
t
OFF
Figure 1. Switching Time
HP4195A
S1
R1
T1
HP11667A
PI3L100
100Ω
Figure 2. Gain/Phase Crosstalk, Off Isolation
4
PS8504E
02/02/05
PI3L100
3.3V, Wide Bandwidth, Quad
2:1 Mux/DeMux LAN Switch
V
CC
= 3.3V
0.1µF
DSO
S
IA0
IA1
YA
1
2
3
4
5
6
7
8
16 V
CC
15 Z
14 ID0
Vo
100Ω
100Ω
PI3L100
13 ID1
12 YD
11 IC0
10 IC1
9
YC
IB0
IB1
YB
GND
100Ω
100Ω
PULSE
GENERATOR
Figure 3. Differential Crosstalk Measurement
TRANSMIT 2
TX1
PI3L100
RX1
RECEIVE 2
OFFSET ADJUST
Figure 4a. Full Duplex Transceiver
TX1
120Ω
RX1
100Ω
Figure 4b. Loop Back
Figure 4c. Line Termination
Figure 4d. Line Clamp
5
PS8504E
02/02/05
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