TMDS DDC and Local I
2C Pins
ELECTRICAL CHARACTERISTICS
SLLS919A – DECEMBER 2008 – REVISED JANUARY 2009............................................................................................................................................ www.ti.com
DDC I2C Buffer or Repeater: The TMDS361 provides buffering on the DDC I2C interface for each of the input
ports connected. This feature isolates the capacitance on the source side from the sink side and thus helps in
how the DDC I2C buffer operates. Note that a key requirement on the sink side is that the VIL(Sink) (input to
TMDS361) should be less than 0.4 V. This requirement should be met for the DDC I2C buffer to function
properly. There are three settings of VIL(Sink) and VOL(Sink) that can be chosen based on OVS settings (See Table 8 Local I2C Interface: The TMDS361 includes a slave I2C interface to control device features like TMDS input port
selection, TMDS output edge-rate control, power management, DDC buffer OVS settings, etc. See
Table 8The TMDS361 is designed to be controlled via a local I2C interface or GPIO interface, based on the status of the
I2C_SEL pin. The local I2C interface in the TMDS361 is only a slave I2C interface. See the I2C INTERFACE NOTES section for a detailed description of I2C functionality. over recommended operating conditions (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
IL
Low-level input current
VCC = 3.6 V, VI = 0 V
–10
10
A
Ilkg(Sink)
Input leakage current
Sink pins
VCC = 3.6 V, VI = 4.95 V
–10
10
A
DC bias = 2.5 V, AC = 3.5 Vp-p,
CIO(Sink)
Input/output capacitance
Sink pins
15
pF
f = 100 kHz
VIH(Sink)
High-level input voltage
Sink pins
2.1
5.5
V
VIL1(Sink)
Low-level input voltage
Sink pins
OVS 1
–0.2
0.4
V
VOL1(Sink)
Low-level output voltage
Sink pins
IO = 3 mA, OVS = HIGH
0.6
0.7
V
VIL2(Sink)
Low-level input voltage
Sink pins
OVS 2
–0.2
0.4
V
VOL2(Sink)
Low-level output voltage
Sink pins
IO = 3 mA, OVS = LOW
0.5
0.6
V
VIL3(Sink)
Low-level input voltage
Sink pins
OVS 3
–0.2
0.3
V
VOL3(Sink)
Low-level output voltage
Sink pins
IO = 3 mA, OVS = high-Z
0.4
0.5
V
Ilkg(I2C)
Input leakage current
Port[1:3] pins
VCC = 3.6 V, VI = 4.95 V
–10
10
A
DC bias = 2.5 V, AC = 3.5 Vp-p,
CIO(I2C)
Input/output capacitance
Port[1:3] pins
15
pF
f = 100 kHz
VIH(I2C)
High-level input voltage
Port[1:3] pins
2.1
5.5
V
VIL(I2C)
Low-level input voltage
Port[1:3] pins
–0.2
1.5
V
VOL(I2C)
Low-level output voltage
Port[1:3] pins
IO = 3 mA
0.2
V
12
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