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19-0807; Rev 0; 4/07
Quad, High-Speed HDMI/DVI 2:1 Digital Video Switch
General Description
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). 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. The MAX4886 features 8 (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. The MAX4886 is available in a space-saving, 42-pin, 3.5mm x 9.0mm TQFN package and operates over the extended -40C to +85C temperature range. Single +3.0V to +3.6V Power Supply Low On-Resistance (RON): 8 (typ) Low On-Capacitance (CON): 2.5pF (typ) Low Skew: 20ps (typ) 700A Low Supply Current 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
Features
MAX4886
Ordering Information
PART TEMP RANGE PINPACKAGE PKG CODE
MAX4886ETO+ -40C to +85C 42 TQFN-EP* T42359OM-1
Applications
HDTV Monitors/Receivers Video Projectors Notebook Computers Digital HDTV Switch Boxes/Tuners Multimedia Audio/Video Switchers Servers/Routers with DVI Interfaces Digital Video Recorders LVDS Switching 1000 Base-BX, Switching
+Denotes a lead-free package. *EP = Exposed paddle.
Eye Diagram
EYE DIAGRAM (VDD = 3.3V, f = 2.6GHz 600mVP-P PRBS SIGNAL+)
* 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 MAX4886
ABSOLUTE MAXIMUM RATINGS
(All voltages referenced to GND.) VDD ...........................................................................-0.3V to +4V SEL (Note 1) ...............................................-0.3V to (VDD + 0.3V) COM_, NC_, NO_ .......................................-0.3V to (VDD + 0.3V) Continuous Current Through Any Switch .......................120mA Peak Current Through Any Switches (Pulsed at 1ms, 10% duty cycle).................................240mA Continuous Power Dissipation (TA = +70C) 42-Pin Thin QFN-EP (derate 35.7mW/C above +70C).....................................................................2857.1mW Operating Temperature Range ...........................-40C to +85C Storage Temperature Range .............................-65C to +150C Junction Temperature .................................................... +150C Lead Temperature (soldering, 10s) .................................+300C
Note 1: Signal exceeding VDD or GND are clamped by internal diodes. Limit forward-diode current to maximum current rating.
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
(VDD = +3.0V to +3.6V, TA = TMIN to TMAX. Typical values are at VDD = +3.3V, TA = +25C, unless otherwise noted.) (Note 2)
PARAMETER Supply Voltage Range Quiescent Supply Current ANALOG SWITCH VDD = +3V, 0V VCOM_ VDD, ICOM_ = -40mA On-Resistance (Note 3) RON VDD = +3V, ICOM_ = -40mA, 0 VCOM_ 1.5V VDD = +3V, 1.5V VCOM_ VDD, ICOM_ = -40mA VDD = +3V, 0 VCOM_ 1.5V, ICOM_= -40mA VDD = +3V, ICOM_ = -40mA, 1.5V < VCOM_ < VDD RFLAT(ON) VDD = +3V, ICOM_ = -40mA, 0 VCOM_ 1.5V IL TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX -1 0.02 0.02 0.28 0.28 8 8 11 15 11 15 0.40 0.8 0.40 0.8 0.60 1 0.60 1 +1 A SYMBOL VDD IDD +3V VDD +3.6V; SEL = 0V or VDD CONDITIONS MIN 3.0 600 TYP MAX 3.6 1100 UNITS V A
On-Resistance Matching (Notes 3, 4)
RON
On-Resistance Flatness (Note 3)
Leakage Current SWITCH DYNAMIC Off-Capacitance
VDD = +3.6V, VCOM_ = +0.3V, +3.3V, VNC_ or VNO_ = +3.3V, 0.3V f = 1MHz, VCOM_ = VNC_ or VNO_
COFF
1.5
pF
2
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Quad, High-Speed HDMI/DVI 2:1 Digital Video Switch
ELECTRICAL CHARACTERISTICS (continued)
(VDD = +3.0V to +3.6V, TA = TMIN to TMAX. Typical values are at VDD = +3.3V, TA = +25C, unless otherwise noted.) (Note 2)
PARAMETER On-Capacitance Propagation Delay Output Skew Between Ports Skew Between Same Ports SWITCH AC PERFORMANCE On-Channel -3dB Bandwidth Insertion Loss Off-Isolation Crosstalk LOGIC INPUTS (SEL) Input-Low Voltage Input-High Voltage Input-Voltage Hysteresis Input Leakage Current VIL VIH VHYST ILEAK VDD = +3.6V, VCOM_ or VNC_ or VNO_ = 0V -1 VDD = +3.0V VDD = +3.6V 2.0 100 +1 0.8 V V mV A BW ILOS VISO VCT1 RS = RL = 50 (Figure 4) RS = RL = 50, f = 50MHz (Figure 4) RS = RL = 50, single-ended, f = 50MHz (Figure 4) Crosstalk between any two switches, RS = RL = 50, f = 50MHz (Figure 4) 2.6 0.6 -58 -49 GHz dB dB dB SYMBOL CON tPD1, tPD2 tSKEW1 tSKEW2 CONDITIONS f = 1MHz, VCOM_ = VNC_ or VNO_ RS = RL = 50 (Figure 2) Skew between any two ports, RS = RL = 50 (Figure 3) RS = RL = 50, skew between any two ports (Figure 3) MIN TYP 2.5 100 20 20 MAX UNITS pF ps ps ps
MAX4886
Note 2: Maximum and minimum limits over temperature are guaranteed by design and characterization. Device is production tested at TA = +25C. Note 3: Negative current is going into COM_ and out of NO_ or NC_. Note 4: Guaranteed by design.
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Quad, High-Speed HDMI/DVI 2:1 Digital Video Switch MAX4886
Typical Operating Characteristics
(TA = +25C, unless otherwise noted.)
ON-RESISTANCE vs. VCOM_
MAX4886 toc01
ON-RESISTANCE vs. TEMPERATURE
9 8 ON-RESISTANCE () 7 6 5 4 3 2 1 0 400 0 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3.0 3.3 VCOM_ (V) TA = -40C TA = +85C TA = +25C
MAX4886 toc02
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX4886 toc03
8.2 8.1 8.0 ON-RESISTANCE () 7.9 7.8 7.7 7.6 7.5 7.4 7.3 7.2 0 0.6 1.2 1.8 VCOM_ (V) 2.4 3.0 VDD = 3.6V VDD = 3V VDD = 3.3V
10
700 650 SUPPLY CURRENT (A) TA = +85C 600 TA = +25C 550 500 450 TA = -40C
3.6
3.0
3.1
3.2
3.3 VDD (V)
3.4
3.5
3.6
LEAKAGE CURRENT vs. TEMPERATURE
MAX4886 toc04
FREQUENCY RESPONSE
-1 -2 ON-LOSS (dB) -3 -4 -5 -6 -7
MAX4886 toc05
10
0
LEAKAGE CURRENT (nA)
1
0.1 -40 -15 10 35 TEMPERATURE (C) 60 85
-8 1 10 100 FREQUENCY (MHz) 1000 10,000
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Quad, High-Speed HDMI/DVI 2:1 Digital Video Switch
Pin Description
PIN 1, 4, 10, 14, 17, 19, 21, 39, 41 5, 8, 13, 18, 20, 30, 40, 42 2 3 6 7 9 11 12 15 16 22 23 24 25 26 27 28 29 31 32 33 34 35 36 37 38 EP NAME GND Ground FUNCTION
MAX4886
VDD COM1+ COM1COM2+ COM2SEL COM3+ COM3COM4+ COM4NO4NO4+ NO3NO3+ NC4NC4+ NC3NC3+ NO2NO2+ NO1NO1+ NC2NC2+ NC1NC1+ EP
Power-Supply Voltage Input. Bypass VDD to GND with a 0.1F or larger ceramic capacitor. Data Signal Inputs/Outputs Data Signal Inputs/Outputs Data Signal Inputs/Outputs Data Signal Inputs/Outputs Select Input. Logic input for switch connection (see Table 1). Data Signal Inputs/Outputs 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.
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Quad, High-Speed HDMI/DVI 2:1 Digital Video Switch MAX4886
Functional Diagram
VDD
Table 1. Switch Truth Table
SEL 0 1 COM_ to NC_ COM_ to NO_ FUNCTION
MAX4886
COM1+ COM1NC1+ NC1+ NO1+ NO1COM2+ COM2NC2+ NC2NO2+ NO2COM3+ COM3NC3+ NC3NO3+ NO3COM4+ COM4NC4+ NC4NO4+ NO4-
The MAX4886 switches are identical, and any of the switches can be used to route RGB and CLK video signals. The device will also be useful in other high-speed switching applications such as LVDS and LVPECL.
Analog-Signal Levels
Signal inputs over the full voltage range (0V to VDD) are passed through the switch with minimal change in onresistance (see the Typical Operating Characteristics section). The switches are bidirectional. Therefore, COM_, NC_, and NO_ can be either inputs or outputs.
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.
Applications Information
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. Always sequence VDD on first, followed by the switch inputs and the logic inputs. Bypass at least one VDD input to ground with a 0.1F capacitor as close to the device as possible. Use the smallest physical size possible for optimal performance. It is also recommended to bypass more than one VDD input. A good strategy is to bypass one VDD input with a 0.1F capacitor and at least a second VDD input with a 1nF to 10nF capacitor. (Use 0603 or smaller physical size ceramic capacitor).
SEL
GND
Detailed Description
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. 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 8 (typ) on-resistance and 2.5pF on-capacitance switches for routing RGB and CLK video signals.
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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 possible. Connect the MAX4886 exposed paddle to a solid ground plane.
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Quad, High-Speed HDMI/DVI 2:1 Digital Video Switch MAX4886
Timing Circuits/Timing Diagrams
MAX4886
VDD V DD COM_ RL SEL LOGIC INPUT GND CL
VN_
NC_ OR NO_
VOUT
CL INCLUDES FIXTURE AND STRAY CAPACITANCE. RL VOUT = VN_ RL + RON
(
)
Figure 1. Switching Time
+3.3V VDD
MAX4886
IN+ 50 TRACE COM1+ NC1+ 50 TRACE OUT+
IN-
50 TRACE
COM1-
NC1-
50 TRACE
OUT-
GND
SEL
COM1+
IN+
COM1-
IN-
NC1+
OUT+
tPD1
tPD2
NC1-
OUT-
Figure 2. Propagation Delay
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Quad, High-Speed HDMI/DVI 2:1 Digital Video Switch MAX4886
Timing Circuits/Timing Diagrams (continued)
+3.3V VDD
MAX4886 IN+ 50 TRACE COM1+ NC1+ 50 TRACE OUT+
IN-
50 TRACE
COM1VDD
NC1-
50 TRACE
OUT-
SEL
COM1+
IN+
COM1-
INtPLH1 OUT+ tPLH2 tPLH1 tPLH2
NC1+
50%
50%
50%
50%
NC1-
OUT-
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. 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 station. 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.
Chip Information
PROCESS: BiCMOS Connect exposed paddle to GND.
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Quad, High-Speed HDMI/DVI 2:1 Digital Video Switch MAX4886
Timing Circuits/Timing Diagrams (continued)
MAX4886
3dB BANDWIDTH/INSERTION LOSS NETWORK ANALYZER 50 TRACE NC1+ 38 50 TRACE NETWORK ANALYZER
COM1+ 2
CROSSTALK NETWORK ANALYZER 50 TRACE
COM2+ 6
NC2+ 36 R13 49.9
NETWORK ANALYZER
50 TRACE
COM27
NC235 R14 49.9
OFF-ISOLATION NETWORK ANALYZER 50 TRACE R15 49.9
COM3+ 11
NC3+ 29 50 TRACE NETWORK ANALYZER
Figure 4. On-Loss, Off-Isolation, and Crosstalk
Typical Application Diagrams
HDMI1 MAX4886 TMDS RX R COM_+ COM_HDMI2 G B CK
TMDS 8 LOW-FREQUENCY SIGNALS
NC_
TMDS 8
NC_
MCU HPIR HPD MAX4929 SEL 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 MAX4886
Typical Application Diagrams (continued)
MAX4886
NO1+ NO1NO2+ NO2DOCKING STATION NO3+ NO3NO4+ NO4-
COM1+ COM1DVI SIGNALS
COM2+ COM2-
COM3+ COM3-
NC1+ NCINC2+ NC2NC3+ NC3NC4+ NC4-
COM4+ COM4-
DVI CONNECTOR
MONITOR
SEL_DOCK
SEL
Figure 6. Notebook Application
Pin Configuration
TOP VIEW
NC1+ NC2+ NO1+ NO2+ NC3+ NC4+ NO3+ NO4+ COM4NC1NC2NO1NO2NC3NC4NO3NO421 GND 20 VDD 19 GND *EP + 1 GND 2 COM1+ 3 COM14 GND 5 VDD 6 COM2+ 7 COM28 VDD 9 SEL COM3+ COM3GND GND COM4+ VDD 18 VDD GND VDD
38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 GND 39 VDD 40 GND 41 VDD 42
MAX4886
10 11 12 13 14 15 16 17
TQFN
*CONNECT EXPOSED PADDLE TO GROUND.
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Quad, High-Speed HDMI/DVI 2:1 Digital Video Switch MAX4886
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.) 42L THIN QFN.EPS 11
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Quad, High-Speed HDMI/DVI 2:1 Digital Video Switch MAX4886
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 (c) 2007 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc.
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