PI3LVD512
3.3V, 5-differential Channel LVDS
Switch Targeted for 24bit Displays
Features
•
•
•
•
•
•
Designed specifically to switch LVDS signals
V
DD
= 3.3V +/-10%
ESD tolerance on video I/O pins is up to 12kV HBM
-3dB BW of 870MHz (typ)
Low Xtalk, (-28dB typ)
Low and Flat ON-STATE resistance (Ron = 3ohm, Ron(Flat)
= 0.5ohm, typ)
• Low input/output capacitance (Con = 6pF, typ)
• Packaging (Pb-free and Green):
− 56 contact TQFN (ZFE)
− 42 contact TQFN (ZHE)
Description
Pericom’s PI3LVD512 is a 5-differential channel LVDS mux/
demux used to switch between multiple LVDS sources or end
points. In a notebook application where analog video signals
are found in both the notebook and the dock, a switch solution
is required to switch between the two video port locations. With
the high bandwidth of 870MHz, the signal integrity will remain
strong even through the long FR4 trace between the notebook and
the docking station. In addition to high signal performance, the
video signals are also protected against high ESD with integrated
diodes to V
DD
and GND that will support up to 12kV of ESD
HBM protection.
Applications
• Routes physical layer signals for high bandwidth
Block Diagram
A0
A1
0B1
1B1
0B2
1B2
A2
A3
2B1
3B1
2B2
3B2
A4
A5
4B1
5B1
4B2
5B2
A6
A7
6B1
7B1
6B2
7B2
A8
A9
8B1
9B1
8B2
9B2
Pin Description (56ZFE, top view)
GND
NC
NC
VDD
GND
VDD
GND
GND
A
0
A
1
VDD
NC
GND
GND
VDD
A
2
A
3
A
4
A
5
GND
A
6
A
7
GND
SEL
VDD
A
8
A
9
56 55 54 53 52 51 50 49
1
48
2
47
3
46
4
45
5
44
43
6
7
42
8
41
40
9
39
10
38
11
37
12
36
13
35
14
34
15
33
16
32
17
18
31
19
30
20
29
21 22 23 24 25 26 27 28
GND
8B
1
9B
1
GND
8B
2
9B
2
VDD
GND
NC
0B
1
1B
1
0B
2
1B
2
2B
1
3B
1
2B
2
3B
2
GND
GND
VDD
4B
1
5B
1
4B
2
5B
2
GND
6B
1
7B
1
6B
2
7B
2
SEL
10-0185
1
PS8979B
09/16/10
3.3V, 5-differential channel LVDS
switch targeted for 24bit displays
Pin Description (42ZHE, top view)
PI3LVD512
VDD
40
VDD
A
0
A
1
A
2
A
3
VDD
VDD
A
4
A
5
A
6
A
7
SEL
A
8
A
9
8B
1
NC
VDD
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
42
41
0B
1
39
NC
NC
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
1B
1
0B
2
1B
2
2B
1
3B
1
2B
2
3B
2
VDD
4B
1
5B
1
4B
2
5B
2
6B
1
7B
1
6B
2
7B
2
VDD
18
9b1
19
NC
20
8B2
21
9B2
Note:
NC pin (5) could be left floating or tied to GND
10-0185
2
PS8979B
09/16/10
3.3V, 5-differential channel LVDS
switch targeted for 24bit displays
Maximum Ratings
PI3LVD512
(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 func-
tional 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.
Truth Table
Input SEL
L
H
Input/Output An
nB
1
nB
2
A
n
= nB
1
A
n
= nB
2
Function
nB
2
high impedance mode
nB
1
high impedance mode
(T
A
= –40°C to +85°C, V
DD
= 3.3V ±10%)
Paramenter
V
IH
V
IL
V
IK
I
IH
I
IL
I
OFF
R
ON
R
FLAT(ON)
∆R
ON
Description
Input HIGH Voltage
Input LOW Voltage
Clamp Diode Voltage
Input HIGH Current
Input LOW Current
DC Electrical Characteristics for Video Switching over Operating Range
Test Conditions
(1)
Guaranteed HIGH level
Guaranteed LOW level
V
DD
= Max., I
SEL
= –18mA
V
DD
= Max., V
SEL
= V
DD
V
DD
= Max., V
SEL
= GND
V
DD
= 0V, VA ≤ 3.6
V
DD
= Min., 0.9V ≤ V
input
≤ 1.6V,
I
input
= –40mA
V
DD
= Min., V
input
@ 0V and 1.5V,
I
input
= –40mA
V
DD
= Min., 0.9V ≤ V
input
≤ 1.6V,
I
input
= –40mA
Min.
2
–0.5
-
-
-
-
-
-
-
Typ.
(2)
-
-
–0.7
-
-
-
2.8
0.5
0.9
Max.
-
0.8
–1.2
±5
±5
±5
3.5
-
2
Ω
µA
V
Units
Power Down Leakage Current
Switch On-Resistance(3)
On-Resistance Flatness(4)
On-Resistance match from center
ports to any other port(4)
10-0185
3
PS8979B
09/16/10
3.3V, 5-differential channel LVDS
switch targeted for 24bit displays
Capacitance
(T
A
= 25°C, f = 1MHz)
Parameters
(4)
Description
Input Capacitance
Port A/B Capacitance, Switch OFF
Switch Capacitance, Switch ON
V
SEL
= 0V
C
IN
C
OFF
C
ON
PI3LVD512
Test Conditions
(1)
Typ.
(2)
2.7
2
6
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 V
DD
= 3.3V, T
A
= 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.
Power Supply Characteristics
Parameters
I
CC
Description
Quiescent Power Supply Current
Test Conditions
(1)
V
DD
= Max., V
SEL
= GND or V
DD
Min.
-
Typ.
(2)
-
Max.
500
Units
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 V
DD
= 3.3V, T
A
= 25°C ambient and maximum loading.
Dynamic Electrical Characteristics Over the Operating Range
(TA=-40º to +85ºC, V
DD
=3.3V±10%, GND=0V)
Parameter
X
TALK
O
IRR
BW
Description
Crosstalk
OFF Isolation
Bandwidth –3dB
Test Conditions
f = 250MHz, See Fig. 2
f = 250MHz, See Fig. 3
See Fig. 1
Min.
-
-
-
Typ.
(2)
-28
-41
880
Max.
-
-
-
Units
dB
MHz
Switching Characteristics
Paramenter
t
PD
t
PZH
, t
PZL
t
PHZ
, t
PLZ
t
b-b
(2)
t
ch-ch
(2)
Propagation Delay(2,3)
Line Enable Time - SEL to Input, Output
Line Disable Time - SEL to Input, Output
Differential Bit-to-bit Skew
Differential channel to channel skew
Description
Min.
-
0.5
0.5
-
-
Typ.(2)
0.25
-
-
-
-
Max.
15
9
15
60
Units
ns
ps
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 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.
10-0185
4
PS8979B
09/16/10
3.3V, 5-differential channel LVDS
switch targeted for 24bit displays
Test Circuit for Electrical Characteristics
(1)
6.0V
V
DD
PI3LVD512
200-ohm
Pulse
Generator
V
IN
D.U.T
R
T
V
OUT
10pF
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. All input impulses are supplied by generators having the following characteristics: f = 10 MHz, Z
O
= 50Ω, t
R
≤ 2.5ns, t
F
≤ 2.5ns.
4. The outputs are measured one at a time with one transition per measurement.
Switch Positions
Test
t
PLZ
, t
PZL
(output on I-side)
t
PHZ
, t
PZH
(output on I-side)
Prop Delay
6.0V
GND
Open
Switch
Test Circuit for Dynamic Electrical Characteristics
HP4396B
R
HP11667A
50-ohm
50-ohm
50-ohm
CL =
See Graph Fig 4
PI3LVD512
T
S
Figure 1. Bandwidth -3dB Testing
10-0185
5
PS8979B
09/16/10
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