Datasheet

SN75DP139
SLLS977D –APRIL 2009–REVISED JULY 2013 www.ti.com
RECOMMENDED OPERATING CONDITIONS (continued)
over operating free-air temperature range (unless otherwise noted)
MIN NOM MAX UNIT
AUXILIARY AND I2C PINS
SDA_SINK, SCL_SINK 0 5.5
V
I
Input voltage V
SDA_SOURCE, SCL_SOURCE 3.6
d
R(I2C)
I
2
C data rate 100 kHz
HPD_SINK, HPDINV, OE_N
V
IH
High-level input voltage 2 5.5 V
V
IL
Low-level input voltage 0 0.8 V
DDC_EN, I2C_EN
V
IH
High-level input voltage 2 3.6 V
V
IL
Low-level input voltage 0 0.8 V
SRC, OVS
V
IH_SRC_OVS
High-level input voltage 3 3.6 V
V
IL_SRC_OVS
Low-level input voltage 0 0.5 V
DEVICE POWER
The SN75DP139 is designed to operate off of one supply voltage VCC.
The SN75DP139 offers features to enable or disable different functionality based on the status of the output
enable (OE_N) and DDC Enable (DDC_EN) inputs.
• OE_N affects only the High Speed Differential channels (Main Link/TMDS link). OE_N has no influence on
the HPD_SINK input, HPD_SOURCE output, or the DDC buffer.
• DDC_EN affects only the DDC channel. The DDC_EN should never change state during the I2C operation.
Disabling DDC_EN during a bus operation will hang the bus, while enabling the DDC_EN during bus traffic
will corrupt the I2C bus operation. DDC_EN should only be toggled while the bus is idle.
• TMDS output edge rate control has impact on the SN75DP139 Active power. See Figure 20. TMDS output
edge rate can be controlled by SRC pin. Slower output Edge Rate Setting helps in reducing the Active power
consumption.
HPD_SINK HPDINV OE_N DDC_EN IN_Dx OUT_Dx DDC HPD_SOURCE MODE
Input = H or L L L L 50 Ω termination Enabled High- Output = non inverted, Active
active impedance follows HPD_SINK
Input = H or L L L H 50 Ω termination Enabled enabled Output = non inverted, Active
active follows HPD_SINK
Input = H or L L H L 50 Ω termination High- High- Output = non inverted, Low Power
active: impedance impedance follows HPD_SINK
Terminations
connected to
common Mode
Voltage = 0V.
Input = H or L L H H 50 Ω termination High- enabled Output = non inverted, Low Power
active: impedance follows HPD_SINK with
Terminations DDC channel
connected to enabled
common Mode
Voltage = 0V.
Input = H or L H L L 50 Ω termination Enabled High- Output = inverted, Active
active impedance follows HPD_SINK
Input = H or L H L H 50 Ω termination Enabled enabled Output = inverted, Active
active follows HPD_SINK
12 Submit Documentation Feedback Copyright © 2009–2013, Texas Instruments Incorporated
Product Folder Links: SN75DP139