PTN3361B Datasheet, PDF (11/29 Pages) NXP Semiconductors – HDMI/DVI level shifter with dongle detect support and active DDC buffer

NXP Semiconductors
PTN3361B
HDMI/DVI level shifter with dongle detect and DDC buffer
7.1.2 Output Enable function (OE_N)
When input OE_N is asserted (active LOW), the IN_Dx and OUT_Dx signals are fully
functional. Input termination resistors are enabled and the internal bias circuits are turned
on.
When OE_N is de-asserted (inactive HIGH), the OUT_Dx outputs are in a
high-impedance state and drive zero output current. The IN_Dx input buffers are disabled
and IN_Dx termination is disabled. Power consumption is minimized.
Remark: Note that OE_N has no influence on the HPD_SINK input, HPD_SOURCE
output, or the SCL and SDA level shifters. OE_N only affects the high-speed TMDS
channel.
7.1.3 DDC channel enable function (DDC_EN)
The DDC_EN pin is active HIGH and can be used to isolate a badly behaved slave. When
DDC_EN is LOW, the DDC channel is turned off. The DDC_EN input should never change
state during an I²C-bus operation. Note that disabling DDC_EN during a bus operation will
hang the bus, while enabling DDC_EN during bus traffic would corrupt the I²C-bus
operation. Hence, DDC_EN should only be toggled while the bus is idle. (See I²C-bus
specification).
PTN3361B_2
Product data sheet
Rev. 02 — 7 October 2009
© NXP B.V. 2009. All rights reserved.
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