PI3L510
3.3V, 4-Channel, 2:1, Mux/DeMux
Fast Ethernet LAN Switch w/ Single Enable
Features
•
•
•
•
•
•
•
•
•
•
•
•
R
ON
is 4Ω (typical)
Low bit-to-bit skew: 200ps
Low Crosstalk: –27dB @ 250 MHz
Near-Zero propagation delay: 250ps
Switching speed: 9ns
Channel On Capacitance: 10pF (typical)
Live Insertion Capable
Status Indicator LEDs switched with Ethernet Pairs
V
CC
Operating Range: +3.0V to +3.6V
>3kV ESD protection (human body model
>350 MHz bandwidth (or data frequency)
Packaging (Pb-free & Green available):
– 36-contact TQFN (ZF)
Description
The PI3L510 is a 8- to 4-Channel multiplexer/demultiplexer LAN
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.
The device multiplexes differential outputs from a Fast Ethernet
transceiver (PHY) device to one of two corresponding B1 or B2
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 10/100 Base-T (Ethernet).
Generally, this part can be used to replace mechanical relays in
low-voltage LAN applications that interface a physical layer over
CAT 5 or CAT 6 unshielded twisted pair cable through an isolation
transformer.
Applications
• Dual Physical Layer Device sharing to one interface
connector
• Routes signals for 10/100 Mbit Ethernet
Block Diagram
A
0
A
1
0
B
1
1
B
1
0
B
2
1
B
2
Pin Description
2LED1
2LED2
LED2
GND
GND
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
A0
A1
GND
A2
A3
GND
SEL
VCC
GND
VCC
VCC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
VCC
0B1
1B1
0B2
1B2
GND
2B1
3B1
2B2
3B2
A
2
A
3
2
B
1
3
B
1
2
B
2
3
B
2
LED
z
z
LED
1
LED0
LED1
1LED2
GND
0LED1
1LED1
GND
0LED2
SEL
07-0077
1
VCC
PS8720C
GND
z
LED
2
03/26/07
PI3L510
3.3V, 4-Channel, 2:1, Mux/DeMux
Fast Ethernet LAN Switch w/ Single Enable
Pin Description
Pin Name
A
X
X
B
Y
Truth Table
Description
Demux Inputs
Mux Inputs
LED Demux Inputs
LED Mux Inputs
Ground
Power
Select
SEL
L
H
Function
A
X
to
X
B
1
; LED
Z
to
Z
LED
1
A
X
to
X
B
2
; LED
Z
to
Z
LED
2
LED
Z
Z
LED
Y
GND
V
DD
SEL
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 RAT-
INGS 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
speci
fi
cation is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect reliability.
DC Electrical Characteristics for 10/100 Base-T Ethernet Switching over Operating Range
(T
A
= –40°C to +85°C, V
CC
= 3.3V ±10%)
Paramenter
V
IH
V
IL
V
IK
I
IH
I
IL
R
ON
R
FLAT(ON)
∆R
ON
Description
Input HIGH Voltage
Input LOW Voltage
Clamp Diode Voltage
Input HIGH Current
Input LOW Current
Switch On-Resistance
(3)
On-Resistance Flatness
(4)
Test Conditions
(1)
Guaranteed HIGH level (Control Pins)
Guaranteed LOW level (Control Pins)
V
CC
= Max., I
IN
= –18mA
V
CC
= Max., V
IN
= V
CC
V
CC
= Max., V
IN
= GND
V
CC
= Min., 1.25V
≤
V
IN
≤
V
CC.
I
IN
= –10mA to –30mA
V
CC
= Min., V
IN
@ 1.25V and V
CC,
I
IN
= –10mA to –30mA
4.0
0.5
0.4
1.0
Min.
2.0
–0.5
–0.7
0.8
–1.2
±5
±5
6.5
Ω
μA
V
Typ.
(2)
Max. Units
On-Resistance match from center V
CC
= Min., 1.25V
≤
V
IN
≤
V
CC,
ports to any other port
(4)
I
IN
= –10mA to –30mA
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
CC
= 3.3V, T
A
= 25°C ambient and maximum loading.
3. Measured by the voltage drop between A
N
and B
N
pins at indicated current through the switch. ON resistance is determined by the lower of the
voltages on the two (A
N
& B
N
) pins.
4. This parameter is determined by device characterization but is not production tested.
07-0077
2
PS8720c
03/26/07
PI3L510
3.3V, 4-Channel, 2:1, Mux/DeMux
Fast Ethernet LAN Switch w/ Single Enable
Capacitance
(T
A
= 25°C, f = 1MHz)
Parameters
(1)
C
IN
C
OFF(B1, B2)
C
ON(A/B)
Description
Input Capacitance
Port B Capacitance, Switch OFF
A/B Capacitance, Switch ON
V
IN
= 0V
Test Conditions
Typ.
2.0
4.0
10.0
Max.
3.0
6.0
11.0
pF
Units
Notes:
1. This parameter is determined by device characterization but is not production tested.
Power Supply Characteristics
Parameters
I
CC(3)
Description
Quiescent Power Supply Current
Test Conditions
(1)
V
CC
= Max., V
IN
= GND or V
CC
Min.
Typ.
(2)
0.5
Max.
3.5
Units
mA
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
CC
= 3.3V, T
A
= 25°C ambient and maximum loading.
3. Per TTL driven input (control inputs only); A and B pins do not contribute to I
CC
.
Dynamic Electrical Characteristics Over the Operating Range
(T
A
= –40°C to +85°C,
Parameter
X
TALK
O
IRR
BW
Description
Crosstalk
OFF Isolation
Bandwidth –3dB
Test Conditions
(1)
R
L
= 100Ω, f = 250 MHz
R
L
= 100Ω, f = 250 MHz
R
L
= 100Ω
V
CC
= 3.3V ±10%, GND = 0V)
Min.
Typ.
(2)
–27
–32
350
Max.
Units
dB
dB
MHz
Notes:
1. For max. or min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type
2. Guaranteed by design.
Switching Characteristics
Paramenter
t
PD
t
PZH
, t
PZL
t
PHZ
, t
PLZ
t
SK(o)
t
SK(p)
Description
Propagation Delay
(2,3)
Line Enable Time - SEL to A
N
, B
N
Line Disable Time - SEL to A
N
, B
N
Output Skew between center port to any other port
(2)
Skew between opposite transitions of the same output
(t
PHL
- t
PLH
)
(2)
0.5
0.5
0.1
0.1
Min.
Typ.
(1)
0.25
15.0
9.0
0.2
0.2
ns
Max.
Units
Notes:
1. Guaranteed by design.
2. 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.
07-0077
3
PS8720c
03/26/07
PI3L510
3.3V, 4-Channel, 2:1, Mux/DeMux
Fast Ethernet LAN Switch w/ Single Enable
Test Circuit for Electrical Characteristics
(1)
6.0V
V
CC
200-ohm
Pulse
Generator
V
IN
V
OUT
D.U.T
R
T
10pF
C
L
200-ohm
Notes:
•
C
L
= Load capacitance: includes jig and probe capacitance.
•
R
T
= Termination resistance should be equal to Z
OUT
of the Pulse Generator
Switch Positions
Test
t
PLZ
, t
PZL
(output on I-side)
t
PHZ
, t
PZH
(output on I-side)
Prop Delay
Switch
6.0V
GND
Open
Test Circuit for Dynamic Electrical Characteristics
HP4195A
S1
R1
T1
V
CC
HP11667A
D.U.T.
10pF
50-ohm
07-0077
4
PS8720c
03/26/07
PI3L510
3.3V, 4-Channel, 2:1, Mux/DeMux
Fast Ethernet LAN Switch w/ Single Enable
Switching Waveforms
SEL
2.5V
1.25V
tPZL
VDD/2
1.25V
0V
3.5V
Input
t
PLH
Output
2.5V
2.5V
2.5V
1.5V
t
PHL
V
OH
2.5V
V
OL
Output
tPZH
Output
tPLZ
VOL +0.3V
tPHZ
VDD/2
VOH –0.3V
VOH
VOL
VOH
VOL
Voltage Waveforms Propagation Delay Times
3.5V
2.5V
Data In
tPLHX
tPHLX
VOH
2.5V
Data Out
at Channel X
I
VOL
tSK(o)
VOH
2.5V
Data Out
at Channel Y
tPLHy
tPHLy
tSK(o) = I tPLHy – tPLHx I or I tPHLy – tPHLx I
VOL
1.5V
Voltage Waveforms Enable and Disable Times
3.5V
2.5V
Input
1.5V
tPLH
tPHL
VOH
Output
tSK(p) = I tPHL – tPLH I
2.5V
VOL
Output Skew - t
SK(o)
•
•
•
•
Pulse Skew - t
SK(p)
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.
All input impulses are supplied by generators having the following characteristics: PRR
≤
10 MHz, Z
O
= 50-ohm, t
R
≤
2.5ns, t
F
≤
2.5ns.
The outputs are measured one at a time with one transition per measurement.
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 the control pin(s) 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 V
CC
before applying signals to
the input/output or control pins.
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd
07-0077
5
PS8720c
03/26/07
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