MAX4886ETO+CFR [MAXIM]
Audio/Video Switch,;
| 型号： | MAX4886ETO+CFR |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Audio/Video Switch, |
| 文件： | 总12页 (文件大小：180K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-0807; Rev 0; 4/07
Quad, High-Speed HDMI/DVI 2:1 Digital
Video Switch
General Description
Features
The MAX4886 high-speed analog switch is ideal for
HDMI/DVI switching applications, permitting 2:1 or 1:2
switching. The MAX4886 contains four differential pairs
of 1:2 or 2:1 switches for RGB and clocking signals.
The MAX4886 connects either one monitor to one of
two digital video signals, or one HDMI/DVI source to
one of two loads (sink).
♦ Single +3.0V to +3.6V Power Supply
♦ Low On-Resistance (R ): 8Ω (typ)
ON
♦ Low On-Capacitance (C ): 2.5pF (typ)
ON
♦ Low Skew: 20ps (typ)
♦ 700µA Low Supply Current
The MAX4886 set of differential switches is based on
an nFET architecture with internal charge pump for gate
overdrive. This advanced architecture results in an
extremely low capacitance and on-resistance needed
for the excellent return loss requirements for digital
switching. An efficient internal charge-pump design
offers very low quiescent current for power-sensitive
notebook designs.
♦ 2.6GHz (typ) Ultra-High Bandwidth
♦ 0.6dB (typ) Ultra-Low Insertion Loss
♦ High-Frequency Companion Device to MAX4929
♦ Use MAX4886 and MAX4929 to Form a Complete
HDMI/DVI 2:1 Switch
♦ 42-Pin, 3.5mm x 9.0mm, Space-Saving TQFN
The MAX4886 features 8Ω (typ) on-resistance and 2.5pF
on-capacitance switches for routing RGB and CLK video
signals. The MAX4886 is a high-frequency companion
device to the MAX4929. These two devices combined
perform the full 2:1 HDMI/DVI switching function.
Ordering Information
PIN-
PACKAGE
PKG
CODE
PART
TEMP RANGE
The MAX4886 is available in a space-saving, 42-pin,
3.5mm x 9.0mm TQFN package and operates over the
extended -40°C to +85°C temperature range.
MAX4886ETO+ -40°C to +85°C 42 TQFN-EP* T42359OM-1
+Denotes a lead-free package.
*EP = Exposed paddle.
Applications
HDTV Monitors/Receivers
Video Projectors
Eye Diagram
Notebook Computers
Digital HDTV Switch Boxes/Tuners
Multimedia Audio/Video Switchers
Servers/Routers with DVI Interfaces
Digital Video Recorders
LVDS Switching
EYE DIAGRAM
(V = 3.3V, f = 2.6GHz
DD
600mV PRBS SIGNAL+)
P-P
1000 Base-BX, Switching
* PRBS = PSUEDORANDOM BIT SEQUENCE
UI = 606ps
Pin Configuration appears at end of data sheet.
________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Quad, High-Speed HDMI/DVI 2:1 Digital
Video Switch
ABSOLUTE MAXIMUM RATINGS
(All voltages referenced to GND.)
Continuous Power Dissipation (T = +70°C)
A
V
...........................................................................-0.3V to +4V
42-Pin Thin QFN-EP (derate 35.7mW/°C above
DD
SEL (Note 1) ...............................................-0.3V to (V
COM_, NC_, NO_ .......................................-0.3V to (V
Continuous Current Through Any Switch ....................... 120mA
Peak Current Through Any Switches
+ 0.3V)
+ 0.3V)
+70°C).....................................................................2857.1mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range.............................-65°C to +150°C
Junction Temperature .................................................... +150°C
Lead Temperature (soldering, 10s) .................................+300°C
DD
DD
(Pulsed at 1ms, 10% duty cycle)................................. 240mA
Note 1: Signal exceeding V
or GND are clamped by internal diodes. Limit forward-diode current to maximum current rating.
DD
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(V
= +3.0V to +3.6V, T = T
A
to T
. Typical values are at V
= +3.3V, T = +25°C, unless otherwise noted.) (Note 2)
DD
A
DD
MIN
MAX
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
600
8
MAX
3.6
UNITS
V
Supply Voltage Range
Quiescent Supply Current
ANALOG SWITCH
V
3.0
DD
DD
I
+3V ≤ V
≤ +3.6V; SEL = 0V or V
1100
µA
DD
DD
T
= +25°C
11
15
A
A
V
= +3V, 0V ≤ V
COM_
DD
T
T
= T
to
MIN
≤ V , I
= -40mA
DD COM_
MAX
On-Resistance (Note 3)
R
Ω
Ω
Ω
ON
T
= +25°C
8
11
A
V
= +3V,
DD
I
= -40mA,
COM_
T
T
= T
to
A
MIN
15
0 ≤ V
≤ 1.5V
COM_
MAX
T
= +25°C
0.28
0.28
0.02
0.02
0.40
0.8
0.40
0.8
0.60
1
A
A
V
= +3V, 1.5V
,
DD
= -40mA
DD
≤ V
≤ V
COM_
T
T
= T
to
MIN
I
COM_
MAX
On-Resistance Matching
(Notes 3, 4)
ΔR
ON
T
= +25°C
A
A
V
= +3V, 0 ≤ V
COM_
DD
T
T
= T
to
MIN
≤ 1.5V, I
= -40mA
COM_
MAX
T
= +25°C
A
V
= +3V,
DD
I
= -40mA,
COM_
T
T
= T
to
A
MIN
1.5V < V
< V
DD
COM_
MAX
On-Resistance Flatness
(Note 3)
R
FLAT(ON)
T
= +25°C
0.60
1
A
A
V
= +3V,
DD
I
= -40mA,
COM_
T
T
= T
to
MIN
0 ≤ V
≤ 1.5V
COM_
MAX
V
V
= +3.6V, V
= +0.3V, +3.3V,
DD
COM_
Leakage Current
I
-1
+1
µA
pF
L
or V
= +3.3V, 0.3V
NC_
NO_
SWITCH DYNAMIC
Off-Capacitance
C
f = 1MHz, V
= V
or V
NO_
1.5
OFF
COM_
NC_
2
_______________________________________________________________________________________
Quad, High-Speed HDMI/DVI 2:1 Digital
Video Switch
ELECTRICAL CHARACTERISTICS (continued)
(V
= +3.0V to +3.6V, T = T
A
to T
. Typical values are at V
= +3.3V, T = +25°C, unless otherwise noted.) (Note 2)
DD
A
DD
MIN
MAX
PARAMETER
SYMBOL
CONDITIONS
= V or V
NO_
MIN
TYP
2.5
MAX
UNITS
pF
On-Capacitance
C
f = 1MHz, V
COM_
ON
NC_
Propagation Delay
t
t
R = R = 50Ω (Figure 2)
100
ps
PD1, PD2
S
L
Skew between any two ports, R = R =
50Ω (Figure 3)
S
L
Output Skew Between Ports
Skew Between Same Ports
t
t
20
20
ps
ps
SKEW1
SKEW2
R = R = 50Ω, skew between any two
S
L
ports (Figure 3)
SWITCH AC PERFORMANCE
On-Channel -3dB Bandwidth
Insertion Loss
BW
R = R = 50Ω (Figure 4)
2.6
0.6
GHz
dB
S
L
I
R = R = 50Ω, f = 50MHz (Figure 4)
S L
LOS
R = R = 50Ω, single-ended, f = 50MHz
(Figure 4)
S
L
Off-Isolation
V
-58
-49
dB
dB
ISO
Crosstalk between any two switches,
Crosstalk
V
CT1
R = R = 50Ω, f = 50MHz (Figure 4)
S
L
LOGIC INPUTS (SEL)
Input-Low Voltage
V
V
V
= +3.0V
= +3.6V
0.8
+1
V
V
IL
DD
DD
Input-High Voltage
V
2.0
-1
IH
Input-Voltage Hysteresis
Input Leakage Current
V
100
mV
µA
HYST
LEAK
I
V
= +3.6V, V
or V
or V
= 0V
NO_
DD
COM_
NC_
Note 2: Maximum and minimum limits over temperature are guaranteed by design and characterization. Device is production tested
at T = +25°C.
A
Note 3: Negative current is going into COM_ and out of NO_ or NC_.
Note 4: Guaranteed by design.
_______________________________________________________________________________________
3
Quad, High-Speed HDMI/DVI 2:1 Digital
Video Switch
Typical Operating Characteristics
(T = +25°C, unless otherwise noted.)
A
ON-RESISTANCE vs. V
COM_
SUPPLY CURRENT vs. SUPPLY VOLTAGE
ON-RESISTANCE vs. TEMPERATURE
8.2
700
650
600
550
500
450
400
10
9
8
7
6
5
4
3
2
1
0
V
= 3.3V
V
= 3V
8.1
8.0
7.9
7.8
7.7
7.6
7.5
7.4
7.3
7.2
DD
DD
T
= +85°C
A
T
= +25°C
T
T
T
= +85°C
= +25°C
= -40°C
A
A
A
A
T
= -40°C
A
V
= 3.6V
DD
0
0.6
1.2
1.8
2.4
3.0
3.6
3.0
3.1
3.2
V
3.3
(V)
3.4
3.5
3.6
0
0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3.0 3.3
(V)
V
(V)
V
COM_
DD
COM_
FREQUENCY RESPONSE
LEAKAGE CURRENT vs. TEMPERATURE
0
-1
-2
-3
-4
-5
-6
-7
-8
10
1
0.1
1
10
100
1000
10,000
-40
-15
10
35
60
85
FREQUENCY (MHz)
TEMPERATURE (°C)
4
_______________________________________________________________________________________
Quad, High-Speed HDMI/DVI 2:1 Digital
Video Switch
Pin Description
PIN
NAME
FUNCTION
1, 4, 10, 14,
17, 19, 21,
39, 41
GND
Ground
5, 8, 13, 18,
20, 30, 40,
42
V
DD
Power-Supply Voltage Input. Bypass V to GND with a 0.1μF or larger ceramic capacitor.
DD
2
COM1+
COM1-
COM2+
COM2-
SEL
Data Signal Inputs/Outputs
3
Data Signal Inputs/Outputs
6
Data Signal Inputs/Outputs
7
Data Signal Inputs/Outputs
9
Select Input. Logic input for switch connection (see Table 1).
Data Signal Inputs/Outputs
11
12
15
16
22
23
24
25
26
27
28
29
31
32
33
34
35
36
37
38
EP
COM3+
COM3-
COM4+
COM4-
NO4-
Data Signal Inputs/Outputs
Data Signal Inputs/Outputs
Data Signal Inputs/Outputs
Differential Pair. Data Signal Inputs/Outputs.
Differential Pair. Data Signal Inputs/Outputs.
Differential Pair. Data Signal Inputs/Outputs.
Differential Pair. Data Signal Inputs/Outputs.
Differential Pair. Data Signal Inputs/Outputs.
Differential Pair. Data Signal Inputs/Outputs.
Differential Pair. Data Signal Inputs/Outputs.
Differential Pair. Data Signal Inputs/Outputs.
Differential Pair. Data Signal Inputs/Outputs.
Differential Pair. Data Signal Inputs/Outputs.
Differential Pair. Data Signal Inputs/Outputs.
Differential Pair. Data Signal Inputs/Outputs.
Differential Pair. Data Signal Inputs/Outputs.
Differential Pair. Data Signal Inputs/Outputs.
Differential Pair. Data Signal Inputs/Outputs.
Differential Pair. Data Signal Inputs/Outputs.
Exposed Paddle. Connect EP to GND.
NO4+
NO3-
NO3+
NC4-
NC4+
NC3-
NC3+
NO2-
NO2+
NO1-
NO1+
NC2-
NC2+
NC1-
NC1+
EP
_______________________________________________________________________________________
5
Quad, High-Speed HDMI/DVI 2:1 Digital
Video Switch
Table 1. Switch Truth Table
Functional Diagram
SEL
0
FUNCTION
V
DD
COM_ to NC_
COM_ to NO_
1
MAX4886
The MAX4886 switches are identical, and any of the
switches can be used to route RGB and CLK video
signals.
COM1+
COM1-
NC1+
NC1+
NO1+
NO1-
The device will also be useful in other high-speed
switching applications such as LVDS and LVPECL.
COM2+
COM2-
NC2+
NC2-
Analog-Signal Levels
Signal inputs over the full voltage range (0V to V ) are
DD
passed through the switch with minimal change in on-
resistance (see the Typical Operating Characteristics
section). The switches are bidirectional. Therefore,
COM_, NC_, and NO_ can be either inputs or outputs.
NO2+
NO2-
NC3+
NC3-
COM3+
COM3-
Logic Inputs (SEL)
The MAX4886 has a logic input that controls the switch
on/off function. Use SEL to switch COM_ to NO_ or
COM_ to NC_. Table 1 and the Functional Diagram
illustrate the MAX4886 Truth Table.
NO3+
NO3-
COM4+
COM4-
NC4+
NC4-
Applications Information
NO4+
NO4-
Power-Supply Bypassing and Sequencing
Proper power-supply sequencing is recommended for
all CMOS devices. Do not exceed the absolute
maximum ratings, because stresses beyond the listed
ratings can cause permanent damage to the device.
SEL
Always sequence V
on first, followed by the switch
DD
inputs and the logic inputs. Bypass at least one V
DD
GND
input to ground with a 0.1µF capacitor as close to the
device as possible. Use the smallest physical size pos-
sible for optimal performance.
It is also recommended to bypass more than one V
DD
Detailed Description
input. A good strategy is to bypass one V
a 0.1µF capacitor and at least a second V
input with
input with
DD
DD
The MAX4886 high-speed analog switch is ideal for
HDMI/DVI switching applications, permitting 2:1 or 1:2
switching. The MAX4886 contains four differential pairs
for HDMI or DVI switching. The MAX4886 connects either
one monitor to one of two digital video signals or one
HDMI/DVI output to one of two connectors or loads.
a 1nF to 10nF capacitor. (Use 0603 or smaller physical
size ceramic capacitor).
PC Board (PCB) Layout
High-speed switches such as the MAX4886 require
proper PCB layout for optimum performance. Ensure
that impedance-controlled PCB traces for high-speed
signals are matched in length, and as short as possi-
ble. Connect the MAX4886 exposed paddle to a solid
ground plane.
The MAX4886 differential switches are based on an
nFET architecture with an internal charge pump for gate
overdrive. This advanced architecture results in an
extremely low capacitance and on-resistance needed
for an excellent returns loss.
The MAX4886 features an 8Ω (typ) on-resistance and
2.5pF on-capacitance switches for routing RGB and
CLK video signals.
6
_______________________________________________________________________________________
Quad, High-Speed HDMI/DVI 2:1 Digital
Video Switch
Timing Circuits/Timing Diagrams
MAX4886
V
V
DD
DD
COM_
NC_
V
N_
V
OUT
OR NO_
R
C
L
L
SEL
GND
LOGIC
INPUT
C INCLUDES FIXTURE AND STRAY CAPACITANCE.
L
R
L
V
= V
N_
OUT
(
)
R + R
ON
L
Figure 1. Switching Time
+3.3V
V
DD
MAX4886
COM1+
COM1-
50Ω TRACE
NC1+
50Ω TRACE
50Ω TRACE
IN+
OUT+
OUT-
NC1- 50Ω TRACE
IN-
SEL
GND
IN+
COM1+
IN-
COM1-
NC1+
t
t
PD2
PD1
OUT+
OUT-
NC1-
Figure 2. Propagation Delay
_______________________________________________________________________________________
7
Quad, High-Speed HDMI/DVI 2:1 Digital
Video Switch
Timing Circuits/Timing Diagrams (continued)
+3.3V
V
DD
MAX4886
COM1+
COM1-
50Ω TRACE
NC1+
50Ω TRACE
50Ω TRACE
IN+
IN-
OUT+
OUT-
NC1- 50Ω TRACE
V
DD
SEL
IN+
COM1+
IN-
COM1-
NC1+
t
t
PLH1
PLH1
t
t
PLH2
PLH2
OUT+
OUT-
50%
50%
50%
50%
NC1-
Figure 3. Skew Measurements
Additional Applications
Information
In a typical application (see Figure 5), the MAX4886
and MAX4929 are used to route the TMDS signals and
low-frequency signals between two HDMI inputs.
Chip Information
PROCESS: BiCMOS
Connect exposed paddle to GND.
In another application (see Figure 6), the MAX4886 is
used in a notebook to route high-frequency DVI port on
the computer or to the connector on the docking sta-
tion. The MAX4886 routes four differential signals (RGB
and CLK) either to the DVI connector or to the docking
station port. The switch is inherently bilateral and may
be used as a 2:1 or 1:2 mux without penalties.
8
_______________________________________________________________________________________
Quad, High-Speed HDMI/DVI 2:1 Digital
Video Switch
Timing Circuits/Timing Diagrams (continued)
MAX4886
NC1+
3dB BANDWIDTH/INSERTION LOSS
COM1+
38
2
50Ω TRACE
50Ω TRACE
NETWORK
ANALYZER
NETWORK
ANALYZER
NC2+
36
CROSSTALK
COM2+
6
50Ω TRACE
50Ω TRACE
50Ω TRACE
NETWORK
ANALYZER
R13
49.9Ω
NC2-
35
COM2-
7
NETWORK
ANALYZER
R14
49.9Ω
NC3+
29
OFF-ISOLATION
COM3+
11
50Ω TRACE
NETWORK
ANALYZER
NETWORK
ANALYZER
R15
49.9Ω
Figure 4. On-Loss, Off-Isolation, and Crosstalk
Typical Application Diagrams
HDMI1
MAX4886
NC_
TMDS
TMDS R
X
8
R
LOW-FREQUENCY SIGNALS
G
COM_+
COM_-
B
CK
HDMI2
NC_
TMDS
8
MCU
HPIR
HPD
SEL
MAX4929
EDID
EEPROM
5V (HPIR), HPD,
DDC/SCL, DDC/SDA
Figure 5. TV/Monitor Application
_______________________________________________________________________________________
9
Quad, High-Speed HDMI/DVI 2:1 Digital
Video Switch
Typical Application Diagrams (continued)
NO1+
MAX4886
NO1-
NO2+
NO2-
NO3+
NO3-
NO4+
NO4-
DOCKING STATION
COM1+
COM1-
DVI
SIGNALS
COM2+
COM2-
COM3+
COM3-
NC1+
NCI-
NC2+
NC2-
NC3+
NC3-
COM4+
COM4-
DVI
CONNECTOR
MONITOR
NC4+
NC4-
SEL
SEL_DOCK
Figure 6. Notebook Application
Pin Configuration
TOP VIEW
38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22
39
40
21 GND
20
19 GND
18
GND
V
V
DD
DD
GND 41
42
MAX4886
*EP
V
V
DD
DD
+
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16 17
TQFN
*CONNECT EXPOSED PADDLE TO GROUND.
10 ______________________________________________________________________________________
Quad, High-Speed HDMI/DVI 2:1 Digital
Video Switch
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,
go to www.maxim-ic.com/packages.)
°
______________________________________________________________________________________ 11
Quad, High-Speed HDMI/DVI 2:1 Digital
Video Switch
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,
go to www.maxim-ic.com/packages.)
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2007 Maxim Integrated Products
is a registered trademark of Maxim Integrated Products, Inc.
Boblet
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