Information

Texas Instruments Signal Chain Guide 2013 | 113
Interface
Consumer/Computing – DisplayPort Switch/Redriver
Get more information: www.ti.com/product/SN75DP122A
DisplayPort 1:2 Switch with Integrated TMDS Translator
SN75DP122A
The SN75DP122A is a one dual-mode DisplayPort input to one dual-mode DisplayPort
output or one TMDS output. The TMDS output has a built-in level translator compliant
with Digital Video Interface (DVI) 1.0 and High Definition Multimedia Interface (HDMI)
1.3b. The DisplayPort output follows the input signal in a manner that provides the
highest level of signal integrity while supporting the EMI benefits of spread-spectrum
clocking. Through the SN75DP122A, data rates of up to 2.7 Gbps through each link
for a total throughput of up to 10.8 Gbps can be realized. The SN75DP122A supports
Display Port Spec 1.1a. In addition to the switching of the DisplayPort high-speed
signal lines, the SN75DP122A also supports the switching of the bidirectional auxiliary
(AUX), Hot Plug Detect (HPD) and Cable Adapter Detect (CAD) channels.
Key Features
• Oneinputporttooneoftwo 
output ports
• IntegratedTMDSleveltranslatorwith
receiver equalization
• DPportsupportsdataratesupto
2.7 Gbps
• DPportsupportsdual-mode 
DisplayPort
• DPportoutputwaveformmimics
input waveform characteristics
• TMDSportsupportsdataratesup
to 2.5 Gbps
• IntegratedI
2
C logic block for DVI/
HDMI connector recognition
Applications
• Personalcomputermarket
Desktop PC
Notebook PC
Docking station
Standalone video card
SN75DP122A functional block diagram
Computer/Notebook/Docking Station
DisplayPort
Enabled
Monitor or HDTV
HDMI/DVI
Monitor or HDTV
DP++
DP++
TMDS
GPU
SN75DP122A
Display Port Switch/Redriver
Device Description
No. of
DisplayPort
Dual Mode
Inputs
No. of
TMDS
Outputs
No. of
DisplayPort
Dual Mode
Outputs
HiRel
Avail. Package Price*
SN75DP118 DisplayPort 1:1 Repeater
1 — 1 N VQFN-36 1.20
SN75DP119 Embedded DisplayPort (eDP) Repeater
1 —  1 N VQFN-14, VQFN-36 0.80
SN75DP120 DisplayPort 1:1 Dual-Mode Repeater
1 —  1 N VQFN-36 1.50
SN75DP121 2-Lane Embedded DisplayPort (eDP) 2:1 Signal Conditioner
1 — 2 N QFN-32 Call
SN75DP122A DisplayPort 1:2 Switch with Integrated TMDS Translator 1 1 1 N QFN-56 1.90
SN75DP128A DisplayPort 1:2 Switch
1 — 2 N QFN-56 1.65
SN75DP129 DisplayPort to TMDS Translator
1 1  — N VQFN-36 1.30
SN75DP130 5.4 Gbps DisplayPort Redriver
1 — 1 N QFN-48 Call
SN75DP139 DisplayPort to TMDS Translator
1 1  — N VQFN-48 1.05
SN75DP219 2-Lane Embedded 5.4 Gbps DisplayPort (eDP) Signal Conditioner
1 — 1 N QFN-14 Call
DS32EV400 1/2/4 Lane DisplayPort Equalizer
— — — N LLP-48 4.50
DS34RT148 Display Port to HDMI Translator with Retimer 1 — — N
—
Call
*Suggested resale price in U.S. dollars in quantities of 1,000. See www.ti.com/hirel for HiRel options. Preview products are listed in bold blue.