HDMI2C2-14HD Datasheet, PDF (17/31 Pages) STMicroelectronics – ESD protection and signal booster for HDMI™ 1.4 sink interface

HDMI2C2-14HD
Electrical characteristics
Table 7. DDC bus (SDA and SCL lines) electrical characteristics⁽¹⁾
Symbol
Parameter
Test conditions
Value
Unit
Min. Typ. Max.
V_{Tup_BUS} Upward input voltage threshold on bus side
V_{Tdown_BUS} Downward input voltage threshold on bus side
1.5
V_{HYST_BUS} Input hysteresis on bus side
1.0
V_{OL_BUS} Output low level
Current sunk by SDA and SCL
pin is 3 mA
T_{RISE_BUS} Output rise-time (30% to 70%)
C_BUS = 750 pF⁽²⁾
R_UP = 2 KΩ //47 KΩ + 10%⁽³⁾
T_{FALL_BUS} Output fall-time (30% to 70%)
V_{Tup_IC} Upward input voltage threshold on IC side
55 60
V_{Tdown_IC} Downward input voltage thresholds IC side
35 40
V_{OL_IC} Output low level on IC side
Current sunk by SDA_IC or
SCL_IC pins is 500 µA
3.5
V
V
1.3
V
0.35
V
500
ns
50
ns
65 %V_{DD_IC}
45 %V_{DD_IC}
20
mV
C_{IN_DDC} Input capacitance on DDC link
V_{EN_DCC(5)} DCC enabling
V_{DD_5V} = 0 V
V_{DD_IC} = 0 V
V_{DD_CEC} = 0 V
V_BIAS = 0 V, f = 1 MHz
V_OSC = 30 mV
9 17⁽⁴⁾
pF
4.1
V
1. T_amb = 25 °C, V_{DD_5V} = 5 V, V_{DD_IC} = 1.8 V, unless otherwise specified
2. Maximum load capacitance allowed on I2C entire link (cable + connector) is 750 pF in HDMI 1.4 specification.
3. Two pull-up resistors in parallel (sink 47 kΩ + source 2 kΩ).
4. Maximum capacitance allowed at connector output is 50 pF in HDMI 1.4 specification
5. In order to activate the DCC lines, the level on DCC_EN pin has to reach the V_{EN_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.
DocID024813 Rev1
17/31
31