IP4778CZ38_2

© NXP B.V. 2009. All rights reserved.

Product data sheet

Rev. 02 — 12 February 2009

6 of 26

NXP Semiconductors

IP4778CZ38

HDMI ESD protection, DDC buffering and hot plug control

[1]

Pins GND and TMDS_GND are internally connected.

[2]

This pin must always be connected to the IC pin located opposite via a PCB track to guarantee correct

functionality; see Figure 15.

[3]

[4]

7.

Limiting values

[1]

Connector side pins:

TMDS_D2+, TMDS_D2

−, TMDS_D1+, TMDS_D1−, TMDS_D0+, TMDS_D0−,

TMDS_CLK+, TMDS_CLK

−,

CEC_OUT,

DDC_DAT_OUT and DDC_CLK_OUT,

HOT_PLUG_DET_OUT.

[2]

Board side pins:

CEC_IN,

DDC_DAT_IN and DDC_CLK_IN,

HOT_PLUG_DET_IN,

ENABLE.

n.c.

32

32

not connected[2]

TMDS_D2

−

34

33

ESD protection TMDS channel D2

−[2]

TMDS_GND

33

34

ground for TMDS channel[1]

n.c.

35

35

not connected[2]

GND

36

36

ground for DDC, Hot Plug and CEC

circuits[1]

37

37

supply voltage for CEC circuit

TMDS_BIAS

38

38

bias input for TMDS ESD protection.

This pin must be connected to a

0.1

µF capacitor.

Table 2.

Symbol

Pin

Description

IP4778CZ38

IP4778CZ38/V

Table 3.

Limiting values

In accordance with the Absolute Maximum Rating System (IEC 60134).

Symbol

Parameter

Conditions

Min

Max

Unit

supply voltage

GND

− 0.5

5.5

V

input voltage

at input pins

GND

− 0.5

5.5

V

electrostatic discharge

voltage

connector side pins (to ground);

IEC 61000-4-2, level 4

[1]

contact

−8+8

kV

board side pins; IEC 61000-4-2, level 1

[2]

contact

−2+2

kV

total power dissipation

DDC operating at 100 kHz

-

8

mW

storage temperature

−55

+125

°C