IP4778CZ38_2

© NXP B.V. 2009. All rights reserved.

Product data sheet

Rev. 02 — 12 February 2009

17 of 26

NXP Semiconductors

IP4778CZ38

HDMI ESD protection, DDC buffering and hot plug control

10.7 Application schematic

Figure 14 shows a typical application where the IP4778CZ38 provides a simplified

interface to an HDMI port. This application requires only a few external components to

adapt the HDMI port to the parameters of the HDMI receiver device or HDMI multiplexer.

Fig 14. Schematic of IP4778CZ38 application

001aah830

1.5

k

Ω

1.5

k

Ω

100

k

Ω

100

Ω

100

Ω

47

k

Ω

1

µF

1 k

Ω

47

k

Ω

27

k

Ω

BAV40

1

2

ENABLE

u/c: >3V3 = enabled

0V = disabled

4

TMDS_D2+

5

TMDS_D2

−

7

TMDS_D1+

8

TMDS_D1

−

10

IP4778CZ38

EDID

TMDS_D0+

11

12

TMDS_D0

−

13

TMDS_CLK+

14

TMDS_CLK

−

16

CEC_IN

17

DDC_CLK_IN

18

DDC_DAT_IN

19

37

HDMI

CONNECTOR

35

34

32

31

29

28

3, 6, 9, 12, 15,

24, 27, 30, 33, 36

TMDS_D2+

TMDS_D2

−

TMDS_D1+

TMDS_D1

−

TMDS_D0+

TMDS_D0

−

TMDS_CLK+

TMDS_CLK

−

CEC

DDC_CLK

DDC_DAT

HOTPLUG_DET

+5 V

26

25

23

7, 8

6

5

1, 2, 3, 4

22

21

20

HOT_PLUG_DET_IN