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PDF PTN3300B Data sheet ( Hoja de datos )
| Número de pieza | PTN3300B | |
| Descripción | DVI and HDMI level shifter | |
| Fabricantes | NXP Semiconductors | |
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PTN3300B
DVI and HDMI level shifter
Rev. 01 — 8 July 2008
www.DataSheet4U.com
Product data sheet
1. General description
The PTN3300B is a high-speed level shifter device which converts four lanes of low-swing
AC-coupled differential input signals to DVI and HDMI compliant open-drain
current-steering differential output signals, up to 2.25 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
PTN3300B 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 for 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 pass gate
technology allowing 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 PTN3300B 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 PTN3300B, 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 PTN3300B main high-speed differential lanes feature low-swing self-biasing
differential inputs which are compliant to the electrical specifications of DisplayPort
Standard v1.1 and/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
PTN3300B also supports power-saving modes in order to minimize current consumption
when no display is active or connected.
The PTN3300B supports level translation functions and features supporting both DVI and
HDMI. A derivative, PTN3300A, is available that is identical to the PTN3300B except that
the HPD_SOURCE_N output is the inverting function of input HPD_SINK, level shifted to
1.1 V. For a fully-featured HDMI/DVI level shifter function that supports active buffering of
the DDC lines and HDMI dongle detect, the PTN3301 should be used.
PTN3300B is powered from a single 3.3 V power supply consuming a small amount of
power (120 mW typical) and is offered in two different 48-terminal HWQFN packages, one
laminate based (no terminals visible from edge of the package), and one leadframe-based
(terminals visible from edge of the package).
1 page  
NXP Semiconductors
5. Pinning information
5.1 Pinning
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PTN3300B
DVI and HDMI level shifter
terminal 1
index area
GND
VDD
n.c.
n.c.
GND
REXT
HPD_SOURCE
SDA_SOURCE
SCL_SOURCE
n.c.
VDD
GND
1
2
3
4
5
6
7
8
9
10
11
12
PTN3300BHF
36 GND
35 n.c.
34 n.c.
33 VDD
32 DDC_EN
31 GND
30 HPD_SINK
29 SDA_SINK
28 SCL_SINK
27 GND
26 VDD
25 OE_N
002aad683
Transparent top view
Fig 3.
HWQFN48R package supply ground is connected to both GND pins and exposed center pad.
GND pins must be connected to supply ground for proper device operation. For enhanced thermal,
electrical, and board level performance, the exposed pad needs to be soldered to the board using
a corresponding thermal pad on the board and for proper heat conduction through the board,
thermal vias need to be incorporated in the PCB in the thermal pad region.
Pin configuration for HWQFN48R
PTN3300B_1
Product data sheet
Rev. 01 — 8 July 2008
© NXP B.V. 2008. All rights reserved.
5 of 23
5 Page 
NXP Semiconductors
www.DataSheet4U.com
PTN3300B
DVI and HDMI level shifter
6.2 Analog current reference
The REXT pin (pin 6) is an analog current sense port used to provide an accurate current
reference for the differential outputs OUT_Dx. For best output voltage swing accuracy, use
of a 10 kΩ resistor (1 % tolerance) connected between this terminal and GND is
recommended.
If an external 10 kΩ ± 1 % resistor is not used, this pin can be left open-circuit, or
connected to GND or VDD, either directly (0 Ω) or using pull-up or pull-down resistors of
value less than 10 kΩ. In any of these cases, the output will function normally but at
reduced accuracy over voltage and temperature of the following parameters: output levels
(VOL), differential output voltage swing, and rise and fall time accuracy.
6.3 Backdrive current protection
The PTN3300B is designed for backdrive prevention on all sink side terminals. This
supports user scenarios where the display is connected and powered, but the PTN3300B
is unpowered. In these cases, the PTN3300B will sink no more than a negligible amount
of leakage current, and will block the display (sink) termination network from driving the
power supply of the PTN3300B or that of the inactive DVI or HDMI source.
PTN3300B_1
Product data sheet
Rev. 01 — 8 July 2008
© NXP B.V. 2008. All rights reserved.
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