HDMI2C2-14HD datasheet(8/31 Pages) STMICROELECTRONICS

Part #	HDMI2C2-14HD

Description	ESD protection and signal booster for HDMI??1.4 sink interface

PDF	31 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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8 / 31 page

Application information

HDMI2C2-14HD

8/31

DocID024813 Rev1

Figure 6. Benefit of the dynamic pull-up on the DDC bus

In order to activate the DDC bus, both following conditions must be respected: the VDD_5V

must be higher than the VDD_ON threshold (see Table 3) and all inputs and outputs of the

bidirectional level shifters (SCL, SDA, SCL_IC, SDA_IC) must be set to a high level at the

same time.

The DDC outputs (SCL and SDA on cable side) integrate a protection against ESD which is

compliant with IEC61000-4-2 standard, level 4 (8kV contact).

Rise time

out of I2C specification

Risk of communication failure

I2C driver without dynamic pull-up

I2C driver with dynamic pull-up

Signal on the cable

IC control

5V_IN

VDD_IC

IC control

Signal on the cable

5V_IN

VDD_IC

R PU_BUS

5V_IN

HDMI™ cable model

750pF

R PU_BUS

5V_IN

HDMI™ cable model

750pF

Rise time compliant with I2C specification

Signal integrity even on 750pF load capacitance

HDMI2C2-14HD Datasheet(PDF) 8 Page - STMicroelectronics