Datasheet

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MAX3816A

C 2-Wire Extender for DDC in DVI,

HDMI, and VGA Interfaces

________________________________________________________________

Maxim Integrated Products

19-4109; Rev 0; 7/08

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

EVALUATION KIT

AVAILABLE

General Description

The MAX3816A DDC*/I

C extender automatically compen-

sates for excess load capacitance of long DVI™, HDMI™,

and VGA cables. A single MAX3816A placed at the dis-

play side of the link restores signal integrity bidirectionally

for both DDC clock and data over 0 to 60 meters of cable.

The MAX3816A features compensation for cable

capacitance with a guaranteed range up to 3000pF,

typically beyond 5000pF. The MAX3816A detects state-

change assertion by the logical “AND” of the source

side and display side. It asserts the new state with a

rail-to-rail slew-rate-limited driver capable of meeting

C rise- and fall-time requirements under the full load

of the cable. After assertion of the new state, a holdoff

period of 2.5µs prevents a subsequent state change

while the cable channel settles.

Under full load at 100kbps, the MAX3816A consumes

25mW, excluding pullup resistors. It is available in a

16-pin TSSOP package and operates from 0°C to +70°C.

Applications

Front-Projector DVI/HDMI Inputs

High-Definition Televisions, Displays, and

Computer Monitors

DVI/HDMI Cable-Extender Modules and Active

Cable Assemblies

Features

♦ DDC or I

C Cable Extension Up to 60 Meters at

100kbps for Both Clock and Data Channels

♦ Single-Sided Solution Requires Only One

MAX3816A at the Display Side

♦ Compensates for Cable Capacitance, 0 to 3000pF

Guaranteed (8x I

C Specification), or Beyond

5000pF Typical

♦ Parallel and Serial Operating Modes

♦ Prevents Ringing Due to Reflections by

Terminating Transmission Line Impedance After

Transitions

♦ Use with MAX3815 TMDS

Equalizer to Form a

Complete Digital Video Extension Solution

♦ 3.0V to 5.5V Power Supply

♦ Optional Voltage Translation Between 5V Cable

DDC and 3.3V Display DDC Levels

Typical Application Circuit (Parallel Mode)

Ordering Information

PART TEMP RANGE PIN-PACKAGE

MAX3816ACUE+ 0°C to +70°C 16 TSSOP

Denotes a lead-free/RoHS-compliant package.

Pin Configuration appears at end of data sheet.

*DDC (Display Data Channel) is part of the VESA Standard.

TMDS is a registered trademark of Silicon Image, Inc.

DVI is a trademark of Digital Display Working Group.

HDMI is a trademark of HDMI Licensing, LLC.

DRVR_EN

CLOCK_C

DATA_C

GND_REF

CLOCK_D

DATA_D

DDC SCL

DDC SDA

DDC +5V

CONNECTOR TO DISPLAY

DVI, HDMI, OR M1 CONNECTOR, < 3m

47kΩ47kΩ

10μF

LONG CABLE FROM VIDEO SOURCE:

DVI, HDMI, OR CAT-5 CABLE UP TO 60m

(200ft)

SHIELD GNDS

DDC SCL

DDC SDA

DDC +5V

SHIELD GNDS

DDC GND

CABLE HEAD OR EXTENDER BOX

OR V

(SEE DESCRIPTION)

MAX3816A

*TO MEET DVI/HDMI SPECIFICATIONS FOR THE DDC +5V LINK, THE V

SIDE OF THE MAX3816A MUST BE EXTERNALLY POWERED. IF NOT APPLICABLE, CONNECT TO DDC +5V.

5V*

MODE

Summary of content (18 pages)

PAGE 1
9-4109; Rev 0; 7/08 KIT ATION EVALU E L B AVAILA I2C 2-Wire Extender for DDC in DVI, HDMI, and VGA Interfaces Features ♦ DDC or I2C Cable Extension Up to 60 Meters at sates for excess load capacitance of long DVI™, HDMI™, and VGA cables. A single MAX3816A placed at the display side of the link restores signal integrity bidirectionally for both DDC clock and data over 0 to 60 meters of cable.
PAGE 2
MAX3816A I2C 2-Wire Extender for DDC in DVI, HDMI, and VGA Interfaces ABSOLUTE MAXIMUM RATINGS Voltage Range (relative to VSS) at VDD, VCC, CLOCK_D, DATA_D, CLOCK_C, DATA_C, DRVR_EN, MODE ..................................................-0.5V to +6.0V Continuous Power Dissipation (TA = +70°C) (derate 11.1mW/°C above +70°C) ..............................889mW Voltage Range (relative to VSS) at GND_REF .......-0.5V to +0.5V Operating Junction Temperature (TJ) Range ....
PAGE 3
I2C 2-Wire Extender for DDC in DVI, HDMI, and VGA Interfaces (VCC = +3.0V to +5.5V, VDD = +3.0V to +5.5V, TA = 0°C to +70°C. Typical values are at TA = +25°C, VCC = +5.0V, VDD = +3.3V, unless otherwise noted.) PARAMETER SYMBOL TYP MAX 3.0V to 3.6V supply 700 1000 4.5V to 5.5V supply 700 3.0V to 3.6V supply 200 4.5V to 5.
PAGE 4
Typical Operating Characteristics (continued) (VCC = +5.0V, VDD = +3.3V, TA = +25°C, unless otherwise noted.) WITH MAX3816A 1V/div 2μs/div WITHOUT MAX3816A WITHOUT MAX3816A 2μs/div 2μs/div WITH MAX3816A CABLE SIDE TRANSITION TIME vs. CABLE CAPACITANCE 1200 30% TO 70% RISE OR FALL (ns) 1V/div MAX3816A toc07 CLOCK_C TRANSIENT RESPONSE WITH AND WITHOUT MAX3816A, 62pF CABLE LOAD WITHOUT MAX3816A 3.3kΩ PULLUP RESISTOR AT EACH END OF CABLE.
PAGE 5
I2C 2-Wire Extender for DDC in DVI, HDMI, and VGA Interfaces SERIES MODE TRANSIENT RESPONSE (3000pF CABLE CAPACITANCE) VIDEO SOURCE CLOCK 5V/div CLOCK_C AT MAX3816A 2V/div REFLECTION ABERRATION AT CLOCK_C PIN NOT SEEN AT SOURCE VIDEO SOURCE DATA 5V/div DISPLAY CLOCK 5V/div MAX3816A toc10 MAX3816A toc09 REFLECTION ABSORBED BY MAX3816A CLOCK_C AT REMOTE CLIENT 2V/div ACTUAL SIGNAL AT VIDEO SOURCE DISPLAY DATA 5V/div 2μs/div 1μs/div 50m CABLE ON SOURCE SIDE, 330pF CAPACITANCE ON DISPLAY SIDE, VCC =
PAGE 6
I2C 2-Wire Extender for DDC in DVI, HDMI, and VGA Interfaces MAX3816A Pin Description PIN NAME FUNCTION 1 DRVR_EN 2 VCC 3 CLOCK_C I2C Cable-Side Clock with Cable Driver, CMOS Input/Output. Connect a 47k pullup resistor to VCC. 4 GND_REF Cable-Side Ground Return. Connect directly to cable DDC ground wire. The MAX3816A circuitry uses the video source DDC GND as a threshold reference. Also connect 10μF or larger bypass capacitors as shown in Figure 6.
PAGE 7
I2C 2-Wire Extender for DDC in DVI, HDMI, and VGA Interfaces 3) Low state. Level sensing off (Holdoff). Level sensing remains off until the completion of the holdoff period, which is 2.5µs on both the clock and data channels. In series mode, drivers maintain low level (at or below VHOLD). Either the client pulldowns sustain the level below VOL, or the MAX3816A sustains the level at VHOLD if no other driver on the same node is pulling down.
PAGE 8
MAX3816A I2C 2-Wire Extender for DDC in DVI, HDMI, and VGA Interfaces Locally, connect a 47kΩ pullup resistor from CLOCK_C and DATA_C to V CC . This assumes that a 1.65kΩ pullup resistor resides at the opposite end of each channel. Locally, connect a 2.2kΩ pullup resistor from CLOCK_D and DATA_D to VDD for VDD = 3.3V, or a 3.3kΩ pullup resistor to VDD for VDD = 5V. Display Drivers The MAX3816A’s level-sensing circuitry monitors the incoming data for state transitions.
PAGE 9
I2C 2-Wire Extender for DDC in DVI, HDMI, and VGA Interfaces MAX3816A VXX CABLE/ SOURCE SIDE (NOTE 1) DDC VIH = 70% VXX VTRIGIH = 75% VXX DDC VIL = 30% VXX VTRIGIH = 12.5% VCC CLOCK_C, 17.5% VDD CLOCK_D DDC VOL(max) = 0.4V GND 3 STATE NUMBER 1 2 6 4 5 1 VXX DDC VIH = 70% VXX DISPLAY SIDE (NOTE 1) DDC VIL = 30% VXX VHOLD = 15% VCC CLOCK_C, 20% VDD CLOCK_D DDC VOL(max) = 0.4V GND HOLDOFF TIMER 0μs 1.75μs 2.5μs 0μs 1.75μs 2.
PAGE 10
MAX3816A I2C 2-Wire Extender for DDC in DVI, HDMI, and VGA Interfaces DRVR_EN VDD CMOS VSS MAX3816A DRIVER ENABLE VCC CABLE DRIVER VCC VDD DRIVER_ENABLE (INTERNAL) DISPLAY DRIVER CABLE TERMINATION RESISTORS CLOCK_C CONTROLLER AND LEVEL SHIFTER CLOCK_D VSS GND_REF VSS VSS VTRIGIH LEVEL SENSE LEVEL SENSE VTRIGIH LPF LPF VDD VTRIGIL VTRIGIL DRIVER_ENABLE (INTERNAL) CMOS VCC CABLE DRIVER VCC VDD VSS MODE DRIVER_ENABLE (INTERNAL) DISPLAY DRIVER CABLE TERMINATION RESISTORS DATA_
PAGE 11
I2C 2-Wire Extender for DDC in DVI, HDMI, and VGA Interfaces tHOLDOFF WITH MAX3816A VTRIGIH CLOCK_C OR DATA_C VTRIGIL MAX3816A tHOLDOFF WITHOUT MAX3816A Figure 3. Holdoff Operation tHOLDOFF_D O = DECISION POINT DATA CLOCK tHOLDOFF_C Figure 4.
PAGE 12
MAX3816A I2C 2-Wire Extender for DDC in DVI, HDMI, and VGA Interfaces LONG CABLE FROM VIDEO SOURCE: DVI, HDMI, OR M1 CONNECTOR CABLE UP TO 60m (200ft) DISPLAY I2C BUS REFERENCE TO 3.3V DISPLAY 3.3V DDC +5V VCC 47kΩ VDD 47kΩ 2.2kΩ 2.2kΩ MAX3816A DDC SCL CLOCK_C DDC SDA DATA_C CLOCK_D I2C SCL DATA_D I2C SDA MODE DRVR_EN VCC GND_REF VSS VDD OR VSS (SEE DESCRIPTION) VSS 10μF VDD DDC GND 10μF 1μF GROUND PLANE SHIELD GNDS DISPLAY GND DISPLAY CIRCUIT BOARD Figure 5.
PAGE 13
I2C 2-Wire Extender for DDC in DVI, HDMI, and VGA Interfaces MAX3816A LONG CABLE FROM VIDEO SOURCE: DVI, HDMI, OR CAT-5 CABLE UP TO 60m (200ft) CONNECTOR TO DISPLAY DVI, HDMI, OR M1 CONNECTOR, < 3m 5V* DDC +5V DDC +5V 47kΩ VCC 47kΩ VDD 3.3kΩ 3.
PAGE 14
MAX3816A I2C 2-Wire Extender for DDC in DVI, HDMI, and VGA Interfaces +5V +5V 3.3kΩ SER PAR 1 0 3.3kΩ 1 0 MAX4719 +5V +5V ENA DRVR_EN 47kΩ 47kΩ MODE BYP CLK_C CLK_D DATA_C DATA_D LONG CABLE FROM SOURCE CONNECTOR TO DISPLAY MAX3816A SERIES MODE: PARALLEL MODE: BYPASS MODE: ISOLATE MODE: DRVR_EN = HI (ENA), MODE = LO (SER) DRVR_EN = HI (ENA), MODE = HI (PAR) DRVR_EN = LO (BYP), MODE = HI (PAR) DRVR_EN = LO (BYP), MODE = LO (SER) Figure 7.
PAGE 15
I2C 2-Wire Extender for DDC in DVI, HDMI, and VGA Interfaces MAX3816A LONG CABLE FROM VIDEO SOURCE: DVI, HDMI, OR CAT-5 CABLE UP TO 60m (200ft) CONNECTOR TO DISPLAY DVI, HDMI, OR M1 CONNECTOR, < 3m 5V* DDC +5V DDC +5V 47kΩ 47kΩ DDC SCL DDC SCL DDC SDA DDC SDA VCC VDD MAX3816A CLOCK_C DATA_C VCC DATA_D MODE DRVR_EN 10μF DDC GND CLOCK_D GND_REF VSS VDD VDD OR VSS (SEE DESCRIPTION) DDC GND 10μF SHIELD GNDS SHIELD GNDS CABLE HEAD OR EXTENDER BOX *TO MEET DVI/HDMI SPECIFICATIONS FOR THE DDC
PAGE 16
I2C 2-Wire Extender for DDC in DVI, HDMI, and VGA Interfaces MAX3816A Interface Schematics VDD VCC MAX3816A MAX3816A SENSE SENSE VSS RETURN VCC VSS CLOCK_D OR DATA_D CLOCK_C OR DATA_C DRIVER BACK TERMINATION VSS DRIVERS Figure 10. CLOCK_D/DATA_D Equivalent Interface Structure RETURN Figure 9. CLOCK_C/DATA_C Equivalent Interface Structure VDD MAX3816A DRVR_EN VSS Figure 11.
PAGE 17
I2C 2-Wire Extender for DDC in DVI, HDMI, and VGA Interfaces SOURCE CLIENT DDC MASTER IN VIDEO SOURCE: PC, DVD, STB DDC +5V RPULLUP LONG CABLE UP TO 60 METERS (200ft) DVI OR HDMI CABLE, OR CAT-5 DDC+5V DDC EXTENDER ONE MAX3816A USED AT DISPLAY SIDE OF CABLE IN CABLE HEAD, OR EXTENDER BOX, OR DISPLAY DISPLAY CLIENT CONNECTOR (OR SHORT CABLE < 3m) TO PROJECTOR, LCD, PLASMA RPULLUP DDC +5V FROM SOURCE DDC +5V DDC+5V 47kΩ VDD VCC 47kΩ 3.3kΩ RPULLUP 3.
PAGE 18
MAX3816A I2C 2-Wire Extender for DDC in DVI, HDMI, and VGA Interfaces Typical In-Display Operating Circuits (continued) DVI-D EXTENDER BOX UP TO 60m DVI-D CABLE MAX3816A UP TO 3m DVI-D CABLE DDC EXTENDER PC MONITOR MAX3815 TMDS EQUALIZER VIDEO SOURCE DIGITAL CABLE DIGITAL SATELLITE DVD PC Pin Configuration Chip Information TRANSISTOR COUNT: 5759 PROCESS: CMOS TOP VIEW + DRVR_EN 1 16 MODE VCC 2 15 VSS_T 14 CLOCK_D CLOCK_C 3 GND_REF 4 MAX3816A DATA_C 5 Package Information For the latest pa