Features
ST3DV520E
MUX/DEMUX for 4 differential channel LVDS and DDC
■ Low R
■ V
CC
■ Enhanced ESD protection: > 8 kV (contact) and
: 4.0 Ω typical
ON
operating range: 3.0 to 3.6 V
15 kV (HBM)
■ Channel on capacitance: 9.5 pF typical
■ Switching time speed: 9 ns
■ Near to zero propagation delay: 250 ps
■ Very low crosstalk: -45 dB at 250 MHz
■ Bit-to-bit skew: 200 ps
■ > 600 MHz -3 dB typical bandwidth (or data
frequency)
■ Support up to 4 differential LVDS channel
■ Support 2 channel for DDC
■ Independent SEL control for LVDS and DDC
channels
■ Package: QFN56
Applications
■ Audio/video switching
■ High bandwidth physical layer signals routing
QFN56
Description
The ST3DV520E is a 4 differential channel LVDS
multiplexer/demultiplexer low R
switch used to switch between multiple LVDS
sources. It is designed for very low crosstalk, low
bit-to-bit skew and low I/O capacitance, to
maintain high signal integrity.
bidirectional
ON
The differential signal from the LVDS transceiver
is multiplexed into one of two selected outputs
while the unselected switch goes to Hi-Z status.
The device integrates 2 SPDT (single pole dual
throw) switches, for DDC channel.
SEL for LVDS and DDC channel is controlled
independently.
Table 1. Device summary
Order code Package Packing
ST3DV520EQTR QFN56 Tape and reel
December 2010 Doc ID 18318 Rev 1 1/19
www.st.com
19
Contents ST3DV520E
Contents
1 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Maximum rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.1 Recommended operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
2/19 Doc ID 18318 Rev 1
ST3DV520E Pin description
1 Pin description
Figure 1. Pin connection (top through view)
SEL1
6$$
DDC1
DDC2
'.$('
'.$&%
6$$
'.$$#
'.$
NC
6$$"!
'.$
'.$
DDC1_0
DDC2_0
'.$
DDC1_1
DDC2_1
6$$
'.$
&
&
('(
'
'.$
%
%
6$$
$#$
'.$
#
'.$
"
!
"
Table 2. Pin description
Pin Symbol Name and function
2, 3, 7, 8, 11, 12, 14, 15 A, B, C, D, E, F, G, H 8-bit bus
48, 47, 43, 42, 37, 36, 32, 31 A0, B0, C0, D0, E0, F0, G0, H0 8-bit multiplexed to bus 0
46, 45, 41, 40, 35, 34, 30, 29 A1, B1, C1, D1, E1, F1, G1, H1 8-bit multiplexed to bus 1
17 SEL1 LVDS channel selection
54 SEL2 DDC channel selection
6$$
'.$
SEL2
'.$
NC
NC
6$$
'.$
!
19, 20 DDC1, DDC2 DDC switch input
22, 23, 25, 26
DDC1_0, DDC2_0, DDC1_1,
4, 10, 18, 27, 38, 50, 56 V
1, 6, 9, 13, 16, 21, 24, 28, 33,
39, 44, 49, 53, 55
5, 51, 52 NC No internal connection
Doc ID 18318 Rev 1 3/19
DDC2_1
DD
DDC switch output
Supply voltage
GND Ground
Pin description ST3DV520E
Figure 2. Input equivalent circuit
SEL
A
B
A0
B0
A1
B1
C
D
C0
D0
C1
D1
E
F
E0
F0
E1
C
F1
G
H
G0
H0
G1
H1
DDC1
DDC2
SEL2
Table 3. LVDS switch function table
SEL1 Function
L 8-bit bus to 8-bit multiplexed bus 0
H 8-bit bus to 8-bit multiplexed bus 1
Table 4. DDC switch function table
SEL2 Function
L DDC switch input connected to DDC switch output X_0
H DDC switch input connected to DDC switch output X_1
DDC1_0
DDC1_1
DDC2_0
DDC2_1
AM08682V1
4/19 Doc ID 18318 Rev 1
ST3DV520E Maximum rating
2 Maximum rating
Stressing the device above the rating listed in the “absolute maximum ratings” table may
cause permanent damage to the device. These are stress ratings only and operation of the
device at these or any other conditions above those indicated in the operating sections of
this specification is not implied. Exposure to absolute maximum rating conditions for
extended periods may affect device reliability.
Table 5. Absolute maximum ratings
Symbol Parameter Value Unit
V
CC
V
V
I
O
P
T
stg
T
1. If VIO x IO does not exceed the maximum limit of PD.
Supply voltage to ground -0.5 to 4.6 V
DC input output voltage -0.5 to 4.6 V
IO
DC control input voltage -0.5 to 4.6 V
IC
DC output current
Power dissipation 0.5 W
D
(1)
Storage temperature -65 to 150 °C
Lead temperature (10 sec) 300 °C
L
2.1 Recommended operating conditions
Table 6. Recommended operating conditions
Symbol Parameter
V
V
V
T
Supply voltage to ground 3 - 3.6 V
CC
DC control input voltage (SEL1, 2) 0 - V
IC
DC input/output voltage 0 - V
IO
Operating temperature -40 - 85 ° C
A
120 mA
Val ue
Min Typ Max
CC
CC
Unit
V
V
Doc ID 18318 Rev 1 5/19
Electrical characteristics ST3DV520E
3 Electrical characteristics
Table 7. DC electrical characteristics
Symbol Parameter Test condition
Voltage input high (SEL1,
2)
Voltage input low
(SEL1, 2)
Clamp diode voltage
(SEL1, 2)
Input high current
(SEL1, 2)
Input low current
(SEL1, 2)
Leakage current through
the switch common
(1)
terminals (A to H)
(DDC1 to DDC2)
High level guaranteed 2.4 - - V
Low level guaranteed -0.5 - 0.8 V
VCC = 3.6 V
= -18 mA
I
IN
VCC = 3.6 V
= V
V
IN
CC
V
= 3.6 V
CC
= GND
V
IN
= 3.6 V
V
CC
A to H = V
CC
DDC1 to DDC2 = V
A0 to H0 = 0 V
A1 to H1 = floating
DDCx_0=0V
IOFF
V
V
V
I
I
IH
IL
IK
IH
IL
(SW)
DDCx1 = floating
IOFF
(SEL1)
SEL1 pin leakage current
SEL1 = V
V
CC
SEL1, 2 = 0 to 3.6 V
= 0 V
, SEL2 = V
CC
VCC = 3.0 V
R
ON
Switch ON resistance
(2)
= 1.5 to V
V
IN
IIN = -40 mA
VCC = 3.0 V
R
ΔR
FLAT
ON
ON resistance flatness
(3)
ON resistance match
between channel
ΔR
= R
ON
(2)(4)
ONMAX-RONMIN
(2)
at 1.5 and VCC
V
IN
= -40 mA
I
IN
VCC = 3.0 V
VIN = 1.5 to V
IIN = -40 mA
CC
CC
CC
CC
Val ue
Min Typ Max
- -0.8 -1.2 V
--±5µA
--±5µA
--±1µA
--±1
-4.06.5Ω
-0.5-Ω
-0.41Ω
Unit-40 to 85 °C
µA
1. Refer to Figure 4: Test circuit for leakage current (IOFF) on page 9
2. Measured by voltage drop between channels at indicated current through the switch. ON resistance is determined by the
lower of the voltages.
3. Flatness is defined as the difference between the R
ΔR
4.
measured at same VCC, temperature and voltage level.
ON
ONMAX
and R
of ON resistance over the specified range.
ONMIN
6/19 Doc ID 18318 Rev 1
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