PTN3300A Datasheet, PDF (11/23 Pages) NXP Semiconductors – DVI/HDMI level shifter with inverting 1.1 V HPD

NXP Semiconductors
PTN3300A
DVI/HDMI level shifter with inverting 1.1 V HPD
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 V_DD, 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
(V_OL), differential output voltage swing, and rise and fall time accuracy.
6.3 Backdrive current protection
The PTN3300A is designed for backdrive prevention on all sink-side terminals. This
supports user scenarios where the display is connected and powered, but the PTN3300A
is unpowered. In these cases, the PTN3300A 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 PTN3300A or that of the inactive DVI or HDMI source.
PTN3300A_1
Product data sheet
Rev. 01 — 30 June 2008
© NXP B.V. 2008. All rights reserved.
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