GND

100KW

CAD= 0

AUX+

AUX-

50 W

3.3V

GND

2.5- 3.3V

SinkConnector

1MW

50 W

75-200nF

SourceConnector

SN75DP120

AUX+

AUX-

75-200nF

50 W

75-200nF

75-200nF

50 W

100KW

1MW

SN75DP120

www.ti.com

SLLSE08 – OCTOBER 2009

Figure 6. Auxiliary Channel Measurement

DisplayPort Main Link Pins

The SN75DP120 is designed to support DisplayPort’s high speed differential main link with four levels of output

voltage swing and four levels of pre-emphasis. The main link I/Os of the SN75DP120 are designed to be

compliant to the DisplayPort 1.1a specification.

ELECTRICAL CHARACTERISTICS

over recommended operating (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

OUTx (Mainlink Outputs)

Output differential peak-to-peak

400

mVp-p

voltage Level 1

Output differential peak-to-peak

600

mVp-p

voltage Level 2

PRBS7 pattern at 1.67 Gbps and 2.7 Gbps,

Measured at TP1 in Figure 8

Output differential peak-to-peak

800

mVp-p

voltage Level 3

Output differential peak-to-peak

1200

mVp-p

voltage Level 4

Output differential peak-to-peak

CAD_SINK = 3.6V

600

mVp-p

voltage TMDS mode

Level 3 (800mVpp),

1.67 Gbps

400

Output differential peak-to-peak

Pattern used is PRBS7,

mVp-p

voltage for DP Compliance v1.1

Measured at TP2 in Figure 8,

2.7 Gbps

350

Per Eye Mask Test in CTS1.1

Output differential peak-to-peak

voltage increase from Level 1 to

1.8

3.3

5.0

dB

Level 2

Output differential peak-to-peak

Measured at TP2,

voltage increase from Level 2 to

1.1

2.7

4.1

dB

Level 3

Refer to Section 3.2 in DP CTS1.1

Output differential peak-to-peak

voltage increase from Level 3 to

1.8

3.4

5.0

dB

Level 4

Copyright © 2009, Texas Instruments Incorporated

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