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PS8798 12/05/05
Block Diagram
PI3HDMI412FT
4-Differential Channel, 2:1 Mux/DeMux, DVI/HDMI
Compliant Signal Switch with Flow-through Pin Out
Features
4-Differential Channel 2:1 Mux/DeMux
TMDS Signaling
Data Rate: 1.65Gbps
Crosstalk: -36dB@1.65Gbps
Switching speed: 4ns
Isolation: -35dB@1.65Gbps
ESD: Data bits @ 8kV HBM, select bit @ 2kV HBM
Near-Zero Prop Delay: 250ps max.
Low bit-to-bit skew
Hot insertion capable
Enable/Disable Time: 9ns
Bidirectional
Packaging (Pb-free & Green):
- 42-pin TQFN (ZH)
- 48-pin BQSOP (B)
Description
Pericom Semiconductor's PI3HDMI series of switch circuits
are targeted for high-resolution video networks that are based
on DVI/HDMI standards, and TMDS signal processing. The
PI3HDMI412FT is an 8- to 4-Channel Mux/DeMux Switch. The
device multiplexes differential signals to one of two corresponding
outputs. The switch is bidirectional and offers little or no attenua-
tion of the high-speed signals at the outputs. It is designed for low
bit-to-bit skew and high channel-to-channel noise isolation.
The maximum DVI/HDMI data rate of 1.65Gbps provides the
resolution required by the next generation HDTV and PC graphics.
Three differential channels are used for data (video signals for DVI
or audio/video signals for HDMI), and one differential channel is
used for Clock for decoding the TMDS signals at the outputs.
Because of its passive bidirectional feature, this switch can be
used either at the video drivers side or at the receiver side. For PC
graphics applications, the device sits at the drivers side to switch
between multiple display units such as PC LCD monitor, projector,
TV, etc. For consumer video applications, the device sits at the
receiver end to switch between the source components such as
DVD, D-VHS, STB, etc.
Pin Description
V
SS
V
DD
V
SS
V
DD
V
SS
D0+
D0-
V
SS
D1+
D1-
V
SS
V
DD
SEL
V
SS
D2+
D2-
V
SS
D3+
D3-
V
SS
V
DD
V
SS
V
DD
V
SS
V
DD
V
SS
D0
+A
D0-
A
D1
+A
D1-
A
V
SS
D2
+A
D2-
A
D3
+A
D3
-A
V
SS
V
DD
D0
+B
D0-
B
D1
+B
D1-
B
V
SS
D2
+B
D2-
B
D3
+B
D3
-B
V
SS
V
DD
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
42-pin TQFN
48-pin BQSOP
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PS8798 12/05/05
PI3HDMI412FT
4-Differential Channel, 2:1 Mux/DeMux, DVI/HDMI
Compliant Signal Switch with Flow-through Pin Out
Truth Table
Function
SEL
N to N
A
L
N to N
B
H
Storage Temperature...........................................................65C to +150C
Supply Voltage to V
SS
Potential............................................0.5V to +2.5V
DC Input Voltage ........................................................................V
SS
to V
DD
DC Output Current.............................................................................120mA
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 specification is not im-
plied. 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.)
DC Electrical Characteristics for Switching over Operating Range
(T
A
= 40C to +85C)
Paramenter
Description
Test Conditions (1)
Min.
Typ
.(2)
Max.
Units
V
IH
3
Input HIGH Voltage
Guaranteed HIGH level
0.65(V
DD
-V
SS
)+V
SS
V
V
IL
3
Input LOW Voltage
Guaranteed LOW level
0.5+V
SS
0.35(V
DD
-V
SS
)+V
SS
V
IK
Clamp Diode Voltage V
DD
=Max., I
IN
=18mA
0.7+V
SS
1.2+V
SS
I
IH
Input HIGH Current
V
DD
=Max., V
IN
=V
DD
5
A
I
IL
Input LOW Current
V
DD
=Max., V
IN
=V
SS
5
Notes:
1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Typical values are at T
A
= 25C ambient and maximum loading.
3. V
IH
& V
IL
are for SEL input only.
Pin Description
Pin # (BQSOP)
Pin # (TQFN)
Pin Name
Description
2, 4, 12, 21, 23, 25,
36, 48
2, 8, 16, 18, 20, 30,
40, 42
V
DD
+ Power supply 3.30
1, 3, 5, 8, 11, 14, 17,
20, 22, 24, 26, 31, 37,
42, 47
1, 5, 10, 13, 17, 19,
21, 39, 41
V
SS
- Power supply
13
9
SEL
Select pin, see truth table
6, 7, 9, 10, 15, 16,
18, 19, 27-30, 32-35,
38-41, 43-46
3, 4, 6, 7, 11, 12, 14,
15, 22-29, 31-38,
Dx
+/-x
+ CLK
+/-x
Data + Clk bits for TMDS signal
DC Power Supply Characteristics
Paramenter
Description
Min.
Max.
Units
V
DD
Positive Power Supply
3.0
3.6
V
V
SS
Negative Power Supply
1.5
1.6
V
3
PS8798 12/05/05
PI3HDMI412FT
4-Differential Channel, 2:1 Mux/DeMux, DVI/HDMI
Compliant Signal Switch with Flow-through Pin Out
Power Supply Characteristics
Parameters
Description
Test Conditions
(1)
Min.
Typ.
(2)
Max.
Units
I
CC
Quiescent Power Supply Current
V
DD
= Max., V
IN
= V
DD
or V
SS
200
A
Notes:
1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Typical values are at T
A
= 25C ambient and maximum loading.
Dynamic Electrical Characteristics Over the Operating Range
(TA= -40 to +85C)
Parameter
Description
Test Conditions
Min.
Typ.
Max.
Units
X
TALK
Crosstalk
See Fig. 1 for Measurement
Setup,
@ 1.65 Gbps
-36
dB
O
IRR
OFF Isolation
See Fig. 2 for Measurement
Setup,
@ 1.65 Gbps
-35
Fig 1. Crosstalk Setup
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PS8798 12/05/05
PI3HDMI412FT
4-Differential Channel, 2:1 Mux/DeMux, DVI/HDMI
Compliant Signal Switch with Flow-through Pin Out
Fig 2. Off-isolation setup
Fig 3. Crosstalk
5
PS8798 12/05/05
PI3HDMI412FT
4-Differential Channel, 2:1 Mux/DeMux, DVI/HDMI
Compliant Signal Switch with Flow-through Pin Out
Notes:
1. For measurement setup, please see "Test Circuit For Electrical Characteristic" on page 6, and "Switching waveforms" on page 7
Switching Characteristics
(TA= -40 to +85C, V
SS
=0V, V
DD
=1.8V 10%)
Paramenter
Description
Min.
Max.
Units
tPZH, tPZL Line Enable Time - SEL to AN, BN
(1)
0.5
8.0
tPHZ, tPLZ Line Disable Time - SEL to AN, BN
(1)
0.5
4.0
Fig 4. Off Isolation
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