CBTL05024

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© NXP Semiconductors N.V. 2014. All rights reserved.

Product data sheet

Rev. 4 — 27 March 2014

6 of 21

NXP Semiconductors

CBTL05024

High performance MUX/deMUX switch for Thunderbolt applications

5.2 Pin description

Table 3.

Pin description

Symbol

Pin

Type

Description

Data path signals

AUX



1

differential I/O

AUX differential signals. The input to this pin must

be AC-coupled externally.

AUX+

2

differential I/O

TB



7

differential I/O

Thunderbolt differential signals. These output

signals must be AC-coupled externally.

TB+

8

differential I/O

AUXIO



23

differential I/O

Differential signals for TB MUX.

AUXIO+

22

differential I/O

DDC_CLK

5

single-ended I/O

Pair of single-ended terminals for DDC clock and

data signals.

DDC_DAT

4

single-ended I/O

DP



10

differential I/O

High-speed differential pair. The input to this pin

must be AC-coupled externally.

DP+

11

differential I/O

DPMLO



20

differential I/O

Differential signals for DP MUX.

DPMLO+

19

differential I/O

LSRX

13

single-ended output Single-ended TB low speed receive signal.

LSTX

14

single-ended I/O

Single-ended TB low speed transmit signal.

Control signals

HPDOUT

12

CMOS output

Output buffer for HPD.

HPD

17

CMOS input

HPD input with 5 V tolerance.

CA_DET

18

CMOS input

When CA_DET = HIGH, DDC_CLK and DDC_DAT

is selected. When CA_DET = LOW, AUX path is

selected.

CA_DETOUT

16

CMOS output

3.3 V CMOS output buffer for CA_DET.

TB_ENA

15

CMOS input

The control input signal to enable Thunderbolt path

for TB MUX.

AUXIO_EN

24

CMOS input

The control signal for TB MUX.

DP_PD

6

CMOS input

The control signal for DP MUX. This MUX must

work during initial power-up that might have

3.3 V supply option

3

Power

3.3 V supply. Pin 3 must be connected to system

power supply.

Ground connections

GND

9, 21

Ground

Supply ground (0 V).

GND

center

pad

Ground

The center pad must be connected to GND plane

for both electrical grounding and thermal relief.