1
PS8719A 03/01/05
Features
R
ON
is 4 typical
Low bit-to-bit skew: 200ps
Low Crosstalk: 22dB @ 250MHz
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
ESD>3000V . . . Human Body Model
>350 MHz bandwidth (or data frequency)
Packaging:
Pb-free and Green 56-contact TQFN (ZF)
56-contact TQFN (ZF)
Applications
Dual Physical Layer Device sharing to one interface
connector
Routes signals for 10/100/1000 Mbit Ethernet
Description
Pericom Semiconductor's PI3L series of switch circuits are produced
using the Company's advanced sub-micron CMOS technology,
achieving industry leading performance.
The PI3L500 is a 16- to 8- 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 Gigabit 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 10/100/1000 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.
Block Diagram
Pin Description
PI3L500
3.3V, 8-Channel, 2:1 Mux/DeMux
Gigabit Ethernet LAN Switch with Single Enable
GND
A
0
A
1
V
DD
N.C.
GND
A
2
A
3
GND
V
DD
A
4
A
5
GND
A
6
A
7
GND
SEL
V
DD
LED
0
LED
1
0
B
1
1
B
1
0
B
2
1
B
2
GND
2
B
1
3
B
1
2
B
2
3
B
2
GND
V
DD
4
B
1
5
B
1
4
B
2
5
B
2
GND
6
B
1
7
B
1
6
B
2
7
B
2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
V
DD
GND
LED
2
GND
2
LED
1
2
LED
2
V
DD
GND
GND
0
LED
1
1
LED
1
GND
0
LED
2
1
LED
2
V
DD
GND
21
22
23
24
25
26
27
28
56
55
54
53
52
51
50
49
SEL
A
7
A
6
A
1
A
0
1
B
1
0
B
1
1
B
2
0
B
2
7
B
1
6
B
1
7
B
2
6
B
2
LED
X
X
LED
1
X
LED
2
2
PS8719A 03/02/05
PI3L500
3.3V, 8-Channel, 2:1 Mux/DeMux
Gigabit Ethernet LAN Switch w/Single Enable
Storage Temperature........................................................ 65C to +150C
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.
Maximum Ratings
(Above which useful life may be impaired. For user guidelines, not tested.)
Pin Description
Pin Name
Description
A
X
Demux Inputs
X
B
Y
Mux Inputs
LED
Z
LED Demux Inputs
Z
LED
Y
LED Mux Inputs
GND
Ground
V
CC
Power
SEL
Select
Truth Table
SEL
Function
L
A
X
to
X
B
1
; LED
Z
to
Z
LED
1
H
A
X
to
X
B
2
; LED
Z
to
Z
LED
2
3
PS8719A 03/02/05
PI3L500
3.3V, 8-Channel, 2:1 Mux/DeMux
Gigabit Ethernet LAN Switch w/Single Enable
DC Electrical Characteristics for 1000 Base-T Ethernet Switching over Operating Range
(T
A
= 40C to +85C, V
CC
= 3.3V 10%)
Paramenter
Description
Test Conditions
Min.
Typ.
(2)
Max.
Units
V
IH
Input HIGH Voltage
Guaranteed HIGH level (Control Pins)
2.0
V
V
IL
Input LOW Voltage
Guaranteed LOW level (Control Pins)
0.5
0.8
V
IK
Clamp Diode Voltage
V
CC
= Max., I
IN
= 18mA
0.7
1.2
I
IH
Input HIGH Current
V
CC
= Max., V
IN
= V
CC
5
A
I
IL
Input LOW Current
V
CC
= Max., V
IN
= GND
5
R
ON
Switch On-Resistance
(3)
V
CC
= Min., 1.5V V
IN
V
CC
I
IN
= 40mA
4.0
6.5
R
FLAT(ON)
On-Resistance Flatness
(4)
V
CC
= Min., V
IN
@ 1.5V and V
CC
I
IN
= 40mA
0.5
R
ON
On-Resistance match from center
ports to any other port
(4)
V
CC
= Min., 1.5V V
IN
V
CC
I
IN
= 40mA
0.4
1.0
DC Electrical Characteristics for 10/100 Base-T Ethernet Switching over Operating Range
(T
A
= 40C to +85C, V
CC
= 3.3V 10%)
Paramenter
Description
Test Conditions
Min.
Typ.
(2)
Max.
Units
V
IH
Input HIGH Voltage
Guaranteed HIGH level (Control Pins)
2.0
V
V
IL
Input LOW Voltage
Guaranteed LOW level (Control Pins)
0.5
0.8
V
IK
Clamp Diode Voltage
V
CC
= Max., I
IN
= 18mA
0.7
1.2
I
IH
Input HIGH Current
V
CC
= Max., V
IN
= V
CC
5
A
I
IL
Input LOW Current
V
CC
= Max., V
IN
= GND
5
R
ON
Switch On-Resistance
(3)
V
CC
= Min., 1.25V V
IN
V
CC
I
IN
=
10mA to 30mA
4.0
6.5
R
FLAT(ON)
On-Resistance Flatness
(4)
V
CC
= Min., V
IN
@ 1.25V and V
CC
I
IN
= 10mA to 30mA
0.5
R
ON
On-Resistance match from cen-
ter ports to any other port
(4)
V
CC
= Min., 1.25V V
IN
V
CC
I
IN
=
10mA to 30mA
0.4
1.0
4
PS8719A 03/02/05
PI3L500
3.3V, 8-Channel, 2:1 Mux/DeMux
Gigabit Ethernet LAN Switch w/Single Enable
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
= 25C ambient and maximum loading.
3. Per TTL driven input (control inputs only); A and B pins do not contribute to I
CC
.
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
= 25C 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.
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.
Switching Characteristics
Capacitance
(T
A
= 25C, f = 1MHz)
Parameters
(5)
Description
Test Conditions
Typ.
Max.
Units
C
IN
Input Capacitance
V
IN
= 0V
2.0
3.0
pF
C
OFF(B1, B2)
Port B Capacitance, Switch OFF
4.0
6.0
C
ON(A/B)
A/B Capacitance, Switch ON
10.0
11.0
Power Supply Characteristics
Parameters
Description
Test Conditions
(1)
Min.
Typ.
(2)
Max. Units
I
CC
Quiescent Power Supply Current
V
CC
= Max., V
IN
= GND or V
CC
--
0.5
3.5
mA
Dynamic Electrical Characteristics Over the Operating Range
(T
A
= 40C to +85C, V
CC
= 3.3V 10%, GND = 0V)
Parameter
Description
Test Conditions
Min.
Typ.
(2)
Max. Units
X
TALK
Crosstalk
R
L
= 100, f = 250MHz
--
27
--
dB
O
IRR
OFF Isolation
--
32
--
BW
Bandwidth 3dB
R
L
= 100
--
350
--
MHz
Paramenter
Description
Min.
Typ.
(2)
Max.
Units
t
PD
Propagation Delay
(2,3)
0.25
ns
t
PZH
, t
PZL
Line Enable Time - SEL to A
N
, B
N
0.5
15.0
t
PHZ
, t
PLZ
Line Disable Time - SEL to A
N
, B
N
0.5
9.0
t
SK(o)
Output Skew between center port (A
4
to A
5
) to any other port
(2)
0.1
0.2
t
SK(p)
Skew between opposite transitions of the same output (t
PHL
- t
PLH
)
(2)
0.1
0.2
5
PS8719A 03/02/05
PI3L500
3.3V, 8-Channel, 2:1 Mux/DeMux
Gigabit Ethernet LAN Switch w/Single Enable
Test Circuit for Electrical Characteristics
(1)
Notes:
1. C
L
= Load capacitance: includes jig and probe capacitance.
2. R
T
= Termination resistance: should be equal to Z
OUT
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, Z
O
= 50, t
R
2.5ns, t
F
2.5ns.
5. The outputs are measured one at a time with one transition per measurement.
Test Circuit for Dynamic Electrical Characteristics
V
CC
D.U.T
T1
R1
S1
HP11667A
50-ohm
10pF
HP4195A
Switch Positions
Test
Switch
t
PLZ
, t
PZL
(output on B-side)
6.0V
t
PHZ
, t
PZH
(output on B-side)
GND
Prop Delay
Open
R
T
10pF
C
L
V
CC
V
IN
V
OUT
200-ohm
200-ohm
6.0V
Pulse
Generator
D.U.T
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