MAX3845 19-0798 Rev 0 4/07 DVI/HDMI 2:4 TMDS Fanout Switch and Cable Driver General Description Features The MAX3845 is a TMDS 2-to-4 fanout switch and Two DVI/HDMI TMDS-Compatible Inputs and Four cable driver for multimonitor distribution of DVI or DVI/HDMI TMDS-Compatible Outputs HDMI signaling up to 1.65Gbps. Both inputs and out- Save Power by Turning Off Unused Outputs puts are standard TMDS signaling as per DVI and HDMI standards. Because TMDS links are point-to-point, Each Output Independently Selects Input 1 or buffering is required for fanout applications. Input 2 Four DVI/HDMI TMDS outputs are provided for fanout Three Preemphasis Settings Extend Cable Reach distribution. Each TMDS output can be independently Up to 7m sourced from either input or can be turned off. Each TMDS input or output is composed of four differential Operation Up to 1.65Gbps channels that can be arbitrarily assigned to the three 14mm x 14mm, 100-Pin TQFP Package with data signals and the 1/10th-rate clock. The data rate Exposed Paddle for Heat Sinking depends on resolution, but it can vary from 250Mbps (VGA) to 1.65Gbps (UXGA or 1080p/60). 3.3V Power Supply Typical applications include multiroom display of the TMDS Data (x3) and Clock (x1) Can Be Arbitrarily same video source or industrial/commercial signage Assigned to the Four Identical Switched Paths (A, applications such as airport monitors or trading room B, C, and D) floor displays. The MAX3845 includes selectable output preemphasis that extends output cable reach up to an additional 7m. For DDC switching, use the companion MAX4814E 2:4 Ordering Information low-resistance CMOS crosspoint switch. DDC switching is not required for applications that connect DDC to one PKG PART TEMP RANGE PIN-PACKAGE reference monitor only. CODE The MAX3845 can be configured to create a 2 x 8 or MAX3845UCQ+ -10C to +85C 100 TQFP-EP C100E-3 4 x 4 switch (see the Typical Operating Circuit diagrams). +Denotes a lead-free package. The MAX3845 is available in a 14mm 14mm, 100-pin EP = Exposed pad. TQFP-EP package and operates over the -10C to +85C temperature range. Applications Typical Operating Circuit Digital Signage and Industrial Display 2:4 FANOUT/SWITCH APPLICATION PC Monitor Distribution CONTROL IN SEL 1:4 Home A/V Receivers SIGNALS PREEMPH 1:4 OUTPUT TO DISPLAY 1 DVI/HDMI Distribution Amplifiers DVI/HDMI Crosspoint Switches VIDEO SOURCE 1 OUTPUT TO DISPLAY 2 MAX3845 2:4 DVI/HDMI TMDS VIDEO SOURCE 2 OUTPUT TO DISPLAY 3 FANOUT SWITCH AND CABLE DRIVER OUTPUT TO DISPLAY 4 Pin Configuration appears at end of data sheet. HOTPLUG 1:4 BUFFER TMDS is a registered trademark of Silicon Image, Inc. 2:4 CMOS SWITCH x5 DDC DATA, DDC CLK, DVI is a trademark of Digital Display Working Group. HOTPLUG, 5V, GND, (CEC) HDMI is a trademark of HDMI Licensing, LLC. Typical Operating Circuits continued at end of data sheet. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com. EVALUATION KIT AVAILABLEDVI/HDMI 2:4 TMDS Fanout Switch and Cable Driver ABSOLUTE MAXIMUM RATINGS Supply Voltage Range (V ) ................................-0.3V to +5.5V Voltage Between Any Output CML I/O CC Voltage Range at HOTPLUGx Pins ......................-0.3V to +6.0V Complementary Pair.......................................................3.6V Voltage Range at LVTTL, LVCMOS, I/O Pins .......-0.3V to +5.5V Continuous Power Dissipation (T = +70C) A Voltage Range at CML Output Pins ......................-0.3V to +5.5V 100-Pin TQFP-EP (derate 45.5mW/C Voltage Range at CML Input Pins above +70C) ............................................................3636mW (CML short to GND duration < 1s)....................-0.3V to +4.0V Operating Junction Temperature .....................-55C to +150C Voltage Between Any Input CML I/O Storage Temperature Range ............................-55C to +150C Complementary Pair ......................................................3.3V Die Attach Temperature ..................................................+400C Voltage Range at LOSMUTE EN ..........................-0.3V to +5.5V Lead Temperature (soldering, 10s) .................................+300C 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 = -10C to +85C. Typical values are at V = +3.3V, external terminations = 50 1%, TMDS rate = CC A CC 250Mbps to 1.65Gbps, T = +25C, unless otherwise noted.) (Note 1) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS PREEMPH 1:4 = high, OUT LEVEL = high, Power-Supply Current I 454 626 mA CC current into V pins, 1200mV = V CC P-P IN Supply-Noise Tolerance DC to 500kHz 50 mV P-P SKIN-EFFECT EQUALIZER PEAKING Fixed Rx Equalizer Gain at 825MHz 1 Compensation PREEMPHx pin = low 0 dB Settable Tx Preemphasis PREEMPHx pin = open 3 PREEMPHx pin = high 6 JITTER PERFORMANCE 0dB cable loss, no 0.04 0.12 preemphasis 200 back 3dB cable loss, +3dB 0.05 0.12 termination preemphasis Residual Deterministic Jitter (Measured at end of cable 6dB cable loss, +6dB 0.07 0.12 having ideal skin-effect loss preemphasis and connectors, e.g., Gore Twin UI 0dB cable loss, no Coax, Amphenol Skewclear 0.07 0.2 preemphasis Twinax, with SMA connectors) (Note 2) No back 3dB cable loss, +3dB 0.08 0.2 termination preemphasis 6dB cable loss, +6dB 0.10 0.2 preemphasis Residual Random Jitter (Note 3) Measured with source T /T = 250ps 1.5 2 ps r f RMS CML INPUTS (SOURCE SIDE) Differential-Input Voltage Swing V At cable input 400 2000 mV ID P-P Common-Mode Input Voltage V V - 1000 V CM CC CC mV Input Voltage When Disconnected V - 10 V + 10 CC CC 2 MAX3845