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PTN3300BHF2 Datasheet(PDF) 10 Page - NXP Semiconductors |
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PTN3300BHF2 Datasheet(HTML) 10 Page - NXP Semiconductors |
10 / 23 page PTN3300B_1 © NXP B.V. 2008. All rights reserved. Product data sheet Rev. 01 — 8 July 2008 10 of 23 NXP Semiconductors PTN3300B DVI and HDMI level shifter 6.1.2 Output Enable function (OE_N) When input OE_N is asserted (active LOW), the IN_Dx and OUT_Dx signals are fully functional provided that HPD_SINK input is HIGH. 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. Internal bias circuits for the differential inputs and outputs are turned off. 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. 6.1.3 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). 6.1.4 Enable/disable truth table [1] A LOW level on input HPD_SINK disables both the TMDS and DDC channels. [2] A HIGH level on input OE_N disables only the TMDS channels. [3] A LOW level on input DDC_EN disables only the DDC channel. [4] OUT_Dx channels ‘enabled’ means outputs OUT_Dx toggling in accordance with IN_Dx differential input voltage switching. [5] DDC channel ‘enabled’ means SDA_SINK is connected to SDA_SOURCE and SCL_SINK is connected to SCL_SOURCE. [6] The HPD_SOURCE output logic state follows the HPD_SINK input logic state regardless of Active or Standby mode. Table 3. HPD_SINK, OE_N and DDC_EN enabling and power saving functions truth table Inputs Channels Mode HPD_SINK [1] OE_N [2] DDC_EN [3] IN_Dx OUT_Dx[4] DDC[5] HPD_SOURCE [6] LOW X X high-impedance high-impedance; zero output current high-impedance LOW Standby HIGH LOW LOW 50 Ω termination to VRX(bias) enabled high-impedance HIGH Active HIGH LOW HIGH 50 Ω termination to VRX(bias) enabled enabled HIGH Active HIGH HIGH LOW high-impedance high-impedance; zero output current high-impedance HIGH Standby HIGH HIGH HIGH high-impedance high-impedance; zero output current enabled HIGH Standby with DDC channel enabled |
Similar Part No. - PTN3300BHF2 |
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Similar Description - PTN3300BHF2 |
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