SN75DP122 Datasheet, PDF (7/35 Pages) Texas Instruments – DisplayPort 1:2 Switch With Integrated TMDS Translator

SN75DP122
www.ti.com
SLLS892 – FEBRUARY 2008
DEVICE POWER
The SN75DP122 is designed to operate off of two supply voltages. The DisplayPort port and the digital logic run
off of the 5V supply voltage. The TMDS level translator is powered off of the 3.3V supply.
ELECTRICAL CHARACTERISTICS
over recommended operating conditions (unless otherwise noted)
PARAMETER
I_DD
Supply current
I_CC
I_DD(2)
I_CC(2)
Supply current
I_DD*1
I_SD
Supply current
Shutdown current
TEST CONDITIONS
LP = 5 V, V_DD*1 = V_DD, Priority = 0 V
ML: V_ID = 600 mV, 2.7 Gbps PRBS
AUX: V_ID = 500 mV, 1 Mbps PRBS
DP/TMDS_HPD_SINK and CAD_SINK = 5 V
LP = 5 V, V_DD*1 = V_DD, Priority = 1 V
ML: V_ID = 500 mV, 2.5 Gbps PRBS
AUX: V_I = 2 V, 100 kHz
DP/TMDS_HPD_SINK and CAD_SINK = 5 V
V_DD*1 = 5.25 V
LP = 0 V
MIN TYP MAX UNIT
60
65
mA
0.1 0.25
2
4
mA
80
110
0.1
4 mA
1
16 µA
HOT PLUG AND CABLE ADAPTER DETECT
The SN75DP122 is designed to support the switching of the Hot Plug Detect and Cable adapter Detect signals.
The SN75DP122 has a built in level shifter for the HPD and CAD outputs. The output voltage level of the HPD
and CAD pins is defined by the voltage level of the V_DD*1 pin.
When the DisplayPort port is selected, the state of CAD_SINK is propagated to the CAD output pin. If the TMDS
port is selected, the CAD output pin stays HIGH as long as that port is selected.
Explanation of HPD and the internal logic of the SN75DP128 is located in the application section at the end of
the data sheet.
ELECTRICAL CHARACTERISTICS
over recommended operating conditions (unless otherwise noted)
V_OH5
V_OH3.3
V_OH2.5
V_OH1.8
V_OL
I_H
I_L
PARAMETER
High-level output voltage
High-level output voltage
High-level output voltage
High-level output voltage
Low-level output voltage
High-level input current
Low-level input current
TEST CONDITIONS
I_OH = –100 µA,
I_OH = –100 µA,
I_OH = –100 µA,
I_OH = –100 µA,
V_DD*1 = 5 V
V_DD*1 = 3.3 V
V_DD*1 = 2.5 V
V_DD*1 = 1.8 V
I_OH = 100 µA,
V_IH = 2.0 V,
V_DD = 5.25 V
V_IL = 0.8 V,
V_DD = 5.25 V
SWITCHING CHARACTERISTICS
over recommended operating conditions (unless otherwise noted)
t_PD(CAD)
t_PD(HPD)
t_T1(HPD)
t_T2(HPD)
t_M(HPD)
t_Z(HPD)
PARAMETER
Propagation delay
Propagation delay
HPD logic switch pause time
HPD logic switch time
Minimum output pulse duration
Low power to high-level propagation delay
TEST CONDITIONS
V_DD*1 = 5 V
V_DD*1 = 5 V
V_DD*1 = 5 V
V_DD*1 = 5 V
V_DD*1 = 5 V
V_DD*1 = 5 V
MIN TYP MAX UNIT
4.5
5V
3
3.3 V
2.25
2.5 V
1.62
1.8 V
0
0.4 V
–10
10 µA
–10
10 µA
MIN TYP
5
30
2
170
100
30 50
MAX
30
110
4.7
400
110
UNIT
ns
ns
ms
ms
ns
ns
Copyright © 2008, Texas Instruments Incorporated
Product Folder Link(s): SN75DP122
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