HDMI2C2-14HD datasheet(17/31 Pages) STMICROELECTRONICS

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HDMI2C2-14HD

Electrical characteristics

Table 7. DDC bus (SDA and SCL lines) electrical characteristics(1)

Symbol

Parameter

Test conditions

Value

Unit

Min. Typ.

Max.

VTup_BUS

Upward input voltage threshold on bus side

3.5

VTdown_BUS Downward input voltage threshold on bus side

1.5

VHYST_BUS Input hysteresis on bus side

1.0

1.3

VOL_BUS

Output low level

Current sunk by SDA and SCL

pin is 3 mA

0.35

TRISE_BUS Output rise-time (30% to 70%)

CBUS = 750 pF

(2)

RUP = 2 KΩ //47 KΩ + 10%

(3)

500

TFALL_BUS Output fall-time (30% to 70%)

VTup_IC

Upward input voltage threshold on IC side

%VDD_IC

VTdown_IC

Downward input voltage thresholds IC side

%VDD_IC

VOL_IC

Output low level on IC side

Current sunk by SDA_IC or

SCL_IC pins is 500 µA

CIN_DDC

Input capacitance on DDC link

VDD_5V = 0 V

VDD_IC = 0 V

VDD_CEC = 0 V

VBIAS = 0 V, f = 1 MHz

VOSC = 30 mV

917(4)

VEN_DCC

(5)

DCC enabling

4.1

Tamb = 25 °C, VDD_5V = 5 V, VDD_IC = 1.8 V, unless otherwise specified

Maximum load capacitance allowed on I2C entire link (cable + connector) is 750 pF in HDMI 1.4 specification.

Two pull-up resistors in parallel (sink 47 k

Ω + source 2 kΩ).

Maximum capacitance allowed at connector output is 50 pF in HDMI 1.4 specification

In order to activate the DCC lines, the level on DCC_EN pin has to reach the

VEN_DCC min value. The inputs and ouputs

of the bidirectional level shifters must be set to a high level after the power-on, and the HPD line has to be activated one

time.

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