PI2PCIE412-D
Enhanced, 1.8V, PCIe®, 4-Differential Channel, 2:1
Mux/DeMu Switch, w/ Single Enable
Features
•
•
•
•
•
•
•
•
•
4 Differential Channel, 2:1 Mux/DeMux
PCI Express
®
signal compliance
Low Bit-to-Bit Skew , 10ps max (between '+' and '-' bits)
Low Crosstalk: -65dB@10 MHz
Low Off Isolation: -65dB@10 MHz
V
DD
Operating Range: +1.5V to +2.0V
ESD Tolerance: 8kV HBM I/O; 2kV HBM select pin
Low channel-to-channel skew, 35ps max
Packaging (Pb-free & Green):
– 42-contact, TQFN (ZH42)
Description
Pericom Semiconductor’s PI2PCIE412-D is an 8 to 4 differential
channel multiplexer/demultiplexer switch. This solution can
switch 2 full PCI Express
®
lanes to one of two locations. Using
a unique design technique, Pericom has been able to minimize
the impedance of the switch such that the attenuation observed
through the switch is negligible. The unique design technique
also offers a layout targeted for PCI Express signals, which
minimizes the channel to channel skew as well as channel to
channel crosstalk as required by the PCI Express specification.
Application
Switch a PCIe
®
lane output between two PCI Express lane inputs.
Block Diagram
A
0
A
1
A
2
A
3
0
B
1
Pin Description
V
DD
GND
V
DD
GND
42 41 40 39
1
B
1
3B
1
0
B
2
1
B
2
2
B
2
3
B
2
4
B
1
5
B
1
6
B
1
7
B
1
4
B
2
5
B
2
6
B
2
7
B
2
2
B
1
A
4
A
5
A
6
A
7
SEL
GND
A
0
A
1
GND
V
DD
A
2
A
3
V
DD
SEL
GND
A
4
A
5
V
DD
GND
A
6
A
7
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
GND
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
0
B
1
1
B
1
2
B
1
3
B
1
0
B
2
1
B
2
2
B
2
3
B
2
V
DD
4
B
1
5
B
1
6
B
1
7
B
1
4
B
2
5
B
2
6
B
2
7
B
2
18 19 20 21
Function
A
N
to
N
B
1
A
N
to
N
B
2
SEL
L
H
13-0004
1
V
DD
GND
V
DD
GND
Truth Table
PS8788C
12/07/12
Enhanced, 1.8V, PCIe®, 4-Differential Channel,
2:1 Mux/DeMux Switch, w/ Single Enable
PI2PCIE412-D
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 +2.5V
DC Input Voltage .............................................................. –0.5V to V
DD
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. Expo-
sure to absolute maximum rating conditions for extended
periods may affect reliability.
(T
A
= –40°C to +85°C, V
DD
= 1.5V to 2.0V)
Paramenter
VIH
VIL
VIK
IIH
IIL
Description
Input HIGH Voltage
Input LOW Voltage
Clamp Diode Voltage
Input HIGH Current
Input LOW Current
DC Electrical Characteristics for Switching over Operating Range
Test Conditions
(1)
Guaranteed HIGH level
Guaranteed LOW level
V
DD
= Max., I
IN
= –18mA
V
DD
= Max., V
IN
= V
DD
V
DD
= Max., V
IN
= GND
Min
0.65 x V
DD
–0.5
–0.7
0.35 x
V
DD
–1.2
±5
±5
µA
V
Typ
(2)
Max
Units
Power Supply Characteristics
Parameters
I
CC
Description
Quiescent Power Supply Current
Test Conditions
(1)
V
DD
= Max., V
IN
= GND or V
DD
Min.
Typ.
(2)
200
Max.
Units
µA
Dynamic Electrical Characteristics Over the Operating Range
(TA= -40º to +85ºC, VDD = 1.8V±10%, GND=0V)
Parameter
X
TALK
O
IRR
BW
Description
Crosstalk
OFF Isolation
Bandwidth @
–3dB
Test Conditions
See Fig. 1 for Measurement Setup, f = 10 MHz
See Fig. 2 for Measurement Setup, f = 10 MHz
Min.
Typ.
(2)
-65
-65
1.4
Max.
Units
dB
GHz
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
= 1.8V,
T
A
= 25°C ambient and maximum loading.
13-0004
2
PS8788C
12/07/12
Enhanced, 1.8V, PCIe®, 4-Differential Channel,
2:1 Mux/DeMux Switch, w/ Single Enable
PI2PCIE412-D
HP4396B
S
HP11667A
50-ohm
50-ohm
50-ohm
R
PI2PCIE412-D
100
-ohm
T
100
-ohm
Fig 1. Crosstalk Setup
HP4396B
S
HP11667A
50-ohm
50-ohm
50-ohm
100
-ohm
R
T
PI2PCIE412-D
Fig 2. Off-isolation setup
13-0004
3
PS8788C
12/07/12
Enhanced, 1.8V, PCIe®, 4-Differential Channel,
2:1 Mux/DeMux Switch, w/ Single Enable
PI2PCIE412-D
Fig 3. Crosstalk
Fig 4. Off Isolation
13-0004
4
PS8788C
12/07/12
Enhanced, 1.8V, PCIe®, 4-Differential Channel,
2:1 Mux/DeMux Switch, w/ Single Enable
PI2PCIE412-D
Switching Characteristics
(TA= -40º to +85ºC, VDD = 1.8V±10%)
Paramenter
tPZH, tPZL
tPHZ, tPLZ
tb-b
tch-ch
Description
Line Enable Time - SEL to AN, BN
Line Disable Time - SEL to AN, BN
Bit-to-bit skew within the same differential pair
Channel-to-channel skew
Min.
0.5
0.5
Max.
8.0
4.0
10
35
Units
ns
ps
ps
Test Circuit for Electrical Characteristics
(1-5)
2 x V
DD
V
DD
200-ohm
Pulse
Generator
V
IN
R
T
D.U.T
V
OUT
4pF
C
L
200-ohm
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. Output 1 is for an output with internal conditions such that the output is low except when disabled by the output control.
output 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
= 50Ω, t
R
≤ 2.5ns, t
F
≤ 2.5ns.
5. The outputs are measured one at a time with one transition per measurement.
Switching Waveforms
SEL
Output 1
tPZL
V
DD2
V
DD
/2
tPLZ
V
OL
+ 0.15V
V
OH
– 0.15V
V
DD
/2
V
DD
0V
VOH
VOL
VOH
VOL
tPZH
Output 2
tPHZ
V
DD/2
Voltage Waveforms Enable and Disable Times
Switch Positions
Test
t
PLZ
, t
PZL
(output on B-side)
t
PHZ
, t
PZH
(output on B-side)
Prop Delay
13-0004
Switch
2 x V
DD
GND
Open
5
PS8788C
12/07/12
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