PTN3361BBS: HDMI/DVI level shifter with dongle detect support and active DDC buffer

The PTN3361B is a high-speed level shifter device which converts four lanes of low-swing AC-coupled differential input signals to DVI v1.0 and HDMI v1.3a compliant open-drain current-steering differential output signals, up to 1.65 Gbit/s per lane. Each of these lanes provides a level-shifting differential buffer to translate from low-swing AC-coupled differential signaling on the source side, to TMDS-type DC-coupled differential current-mode signaling terminated into 50 Ω to 3.3 V on the sink side. Additionally, the PTN3361B provides a single-ended active buffer for voltage translation of the HPD signal from 5 V on the sink side to 3.3 V on the source side and provides a channel with active buffering and level shifting of the DDC channel (consisting of a clock and a data line) between 3.3 V source-side and 5 V sink-side. The DDC channel is implemented using active I²C-bus buffer technology providing capacitive isolation, redriving and level shifting as well as disablement (isolation between source and sink) of the clock and data lines.

The low-swing AC-coupled differential input signals to the PTN3361B typically come from a display source with multi-mode I/O, which supports multiple display standards, e.g., DisplayPort, HDMI and DVI. While the input differential signals are configured to carry DVI or HDMI coded data, they do not comply with the electrical requirements of the DVI v1.0 or HDMI v1.3a specification. By using PTN3361B, chip set vendors are able to implement such reconfigurable I/Os on multi-mode display source devices, allowing the support of multiple display standards while keeping the number of chip set I/O pins low. See Figure 1.

The PTN3361B main high-speed differential lanes feature low-swing self-biasing differential inputs which are compliant to the electrical specifications of DisplayPort Standard v1.1and/or PCI Express Standard v1.1, and open-drain current-steering differential outputs compliant to DVI v1.0 and HDMI v1.3a electrical specifications. The I²C-bus channel actively buffers as well as level-translates the DDC signals for optimal capacitive isolation. Its I²C-bus control block also provides for optional software HDMI dongle detect by issuing a predetermined code sequence upon a read command to an I²C-bus specified address. The PTN3361B also supports power-saving modes in order to minimize current consumption when no display is active or connected.

The PTN3361B is a fully featured HDMI as well as DVI level shifter. It is functionally comparable to PTN3360B but provides additional features supporting HDMI dongle detection and active DDC buffering. For HDMI dongles, support of HDMI dongle detection via the DDC channel is mandatory, hence HDMI dongle applications should enable this feature for correct operation in accordance with DisplayPort interoperability guidelines.

PTN3361B is powered from a single 3.3 V power supply consuming a small amount of power (90 mW typ.) and is offered in a 48-terminal HVQFN48 package.

PTN3361BBS: Product Block Diagram
sot619-1_3d
High-speed TMDS level shifting
  • Converts four lanes of low-swing AC-coupled differential input signals to DVI v1.0 and HDMI v1.3a compliant open-drain current-steering differential output signals
  • Pin-programmable pre-emphasis feature
  • TMDS level shifting operation up to 1.65 Gbit/s per lane (165 MHz character clock)
  • TMDS level shifting operation up to 2.25 Gbit/s per lane (225 MHz character clock) using pre-emphasis feature
  • Integrated 50 Ω termination resistors for self-biasing differential inputs
  • Back-current safe outputs to disallow current when device power is off and monitor is on
  • Disable feature to turn off TMDS inputs and outputs and to enter low-power state
DDC level shifting
  • Integrated active DDC buffering and level shifting (3.3 V source to 5 V sink side)
  • Rise time accelerator on sink-side DDC ports
  • 0 Hz to 400 kHz I²C-bus clock frequency
  • Back-power safe sink-side terminals to disallow backdrive current when power is off or when DDC is not enabled
HDMI dongle detect support
  • Incorporates I²C slave ROM
  • Responds to DDC read to address 81h with predetermined byte sequence
  • Feature enabled by pin DDET (must be enabled for correct operation in accordance with DisplayPort interoperability guideline
HPD level shifting
  • HPD non-inverting level shift from 0 V on the sink side to 0 V on the source side, or from 5 V on the sink side to 3.3 V on the source side
  • Integrated 200 kΩ pull-down resistor on HPD sink input guarantees 'input LOW' when no display is plugged in
  • Back-power safe design on HPD_SINK to disallow backdrive current when power is off
General
  • Power supply 3.3 V +- 10 pct
  • ESD resilience to 7 kV HBM, 1 kV CDM
  • Support for optional HDMI dongle detection via DDC/I²C-bus channel
  • Power-saving modes (using output enable)
  • Back-current-safe design on all sink-side main link, DDC and HPD terminals
  • Transparent operation: no re-timing or software configuration required
Data Sheets (1)
Name/DescriptionModified Date
HDMI/DVI level shifter with dongle detect support and active DDC buffer (REV 2.0) PDF (146.0 kB) PTN3361B07 Oct 2009
Application Notes (1)
Name/DescriptionModified Date
DisplayPort PCB layout guidelines (REV 1.0) PDF (89.0 kB) AN1079805 Mar 2009
Package Information (1)
Name/DescriptionModified Date
plastic thermal enhanced very thin quad flat package; no leads; 48 terminals; body 7 x 7 x 0.85 mm (REV 1.0) PDF (205.0 kB) SOT619-108 Feb 2016
Packing (1)
Name/DescriptionModified Date
HVQFN48; Reel dry pack, SMD, 13" Q1/T1 standard orientation Orderable part number ending, 518 or Y Ordering... (REV 1.0) PDF (193.0 kB) SOT619-1_51821 Oct 2013
Ordering Information
ProductStatusPackage versionRise/fall time (ps)FeaturesStandby current (uA)Other featuresOperating Temperature (Cel)Data transfer rate (Mb/s)Operating frequency (MHz)RGB OutputCrystal oscillatorNumber of channels in applicationOutput voltage (black-to-white) Vp-p typ (V)Supply current (mA)Pixel frequency (MHz)InputsOutputsApplication
PTN3361BBSActiveSOT619-1
Package Information
Product IDPackage DescriptionOutline VersionReflow/Wave SolderingPackingProduct StatusPart NumberOrdering code(12NC)MarkingChemical ContentRoHS / Pb Free / RHFLeadFree Conversion DateEFRIFR(FIT)MTBF(hour)MSLMSL LF
PTN3361BBSSOT619-1Reel 13" Q1/T1 in DrypackActivePTN3361BBS,518 (9352 878 24518)PTN3361BBSPTN3361BBSAlways Pb-free0.04.02.5E822
HDMI/DVI level shifter with dongle detect support and active DDC buffer PTN3361BBS
DisplayPort PCB layout guidelines PTN3361BBS
SOT619-1 LPC2106FHN48
HVQFN48; Reel dry pack, SMD, 13" Q1/T1 standard orientation Orderable part number ending, 518 or Y Ordering... tef7000hn
PTN3361BBS
TDA18260HN