CBTL04DP211

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© NXP B.V. 2011. All rights reserved.

Product data sheet

Rev. 1 — 30 March 2011

10 of 17

NXP Semiconductors

CBTL04DP211

DisplayPort 2 : 1 multiplexer

12. Application information

12.1 Special considerations

Certain cable or dongle misplug scenarios make it possible for a 5 V input condition to

occur on pins AUX+ and AUX

, as well as HPD_IN. When AUX+ and AUX are

connected through a minimum of 2.2 k

 each, the CBTL04DP211 will sink current but will

not be damaged. Similarly, HPD_IN may be connected to 5 V via at least a 1 k

 resistor.

(Correct functional operation to specification is not expected in these scenarios.) The

latter also prevents the HPD_OUT output from loading down the system HPD signal when

power to the CBTL04DP211 is off.

Fig 3.

Application diagram

OUT_0-

AUX+

AUX-

OUT_0+

002aag022

HPD_IN

2 : 1

MUX

OUT_1-

OUT_1+

2 : 1

MUX

2 : 1

MUX

2 : 1

MUX

CBTL04DP211

GND

100 kΩ

100 kΩ

GPU A

GPU B