MAX3815 データシートの表示（PDF） - Maxim Integrated

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MAX3815

TMDS Digital Video Equalizer for DVI/HDMI Cables

Maxim Integrated 

TMDS Digital Video Equalizer for DVI/HDMI

Cables

TERMINATED

3.3V CML

RX2_IN+/-

INPUT

BUFFER

ADAPTIVE

EQ

LIMITING

AMPLIFIER

DRIVER

RX2_OUT+/-

TERMINATED

3.3V CML

RX1_IN+/-

INPUT

BUFFER

ADAPTIVE

EQ

LIMITING

AMPLIFIER

DRIVER

RX1_OUT+/-

TERMINATED

3.3V CML

RX0_IN+/-

INPUT

BUFFER

ADAPTIVE

EQ

LIMITING

AMPLIFIER

DRIVER

RX0_OUT+/-

TERMINATED

3.3V CML

RXC_IN+/-

INPUT

BUFFER

CLKLOS

CLOCK LOS

DETECTOR

MAX3815

LIMITING

AMPLIFIER

DRIVER

EQCONTROL

RXC_OUT+/-

OUTON

OUTLEVEL

Figure 1. Functional Diagram

analog nVGA links, must handle a variety of resolutions

and screen update rates. The actual range of digital

serial rates is roughly 250Mbps to 1.65Gbps. For appli-

cations requiring ultra-high resolutions (e.g., QXGA), a

“double-link” TMDS interface is used and is composed

of six data links plus the clock, requiring two MAX3815

ICs with the clock going to both ICs. See Figure 2.

The MAX3815 can be used to extend any TMDS inter-

face as used under the following trademarked names:

DVI (digital visual interface), DFP™ (digital flat-panel),

PanelLink, ADC™ (Apple display connector), and

HDMI (high-definition multimedia interface).

Loss-of-Clock Signal (CLKLOS) Output

Loss-of-clock signal is indicated by the CLKLOS out-

put. A low level on CLKLOS indicates that the signal

power on the RXC_IN pins has dropped below a

threshold. When there is sufficient input voltage to the

channel (typically greater than 100mVP-P differential),

CLKLOS is high. The CLKLOS output is suitable for

indicating problems with the transmission link caused

by, for example, a broken cable, a defective driver, or a

lost connection to the equalizer.

D0

D0

D1

D1

D2

D2

MAX3815

CLK

CLK

D3

MAX3815

D3

D4

D4

D5

D5

Figure 2. Connection Scheme for MAX3815 in Dual Link

Application

ADC is a trademark of Apple Computer, Inc.

DFP is a trademark of Video Electronics Standards Association

(VESA).

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