TMDS261 datasheet(10/42 Pages) TI

10 / 42 page

DEVICE POWER

ELECTRICAL CHARACTERISTICS

HOT-PLUG DETECT

ELECTRICAL CHARACTERISTICS

TMDS261

SLLS953 – DECEMBER 2008............................................................................................................................................................................................ www.ti.com

The TMDS261 is designed to operate from a single 3.3-V supply voltage. The TMDS261 has three power modes

of operation. These three modes are referred to as normal mode, standby mode, and low-power mode.

Normal mode is designed to be used during typical operating conditions. In normal mode, the device is fully

functional and consumes the greatest amount of power.

Standby mode is designed to be used when reduced power is desired, but DDC and HPD communication must

be maintained. Standby mode can be enabled via the I2C interface (See Table 8 through Table 11). or GPIO

interface (See Table 1). In standby mode, the high-speed TMDS data and clock channels are disabled to reduce

power consumption. The internal I2C logic and DDC function normally. HPD[1:3] follow HPD_SINK.

Low-power mode is designed to consume the least possible amount of power while still applying 3.3 V to the

device. Low-power mode can be enabled by either the LP pin or by local I2C (See Table 8 through Table 11). In

low-power mode, all of the inputs and outputs are disabled with the exception of the internal I2C logic and LP pin.

The clock-detect feature in the TMDS261 provides an automatic power-management feature in normal mode. if

no valid TMDS clock is detected, the terminations on the input TMDS data lines are disconnected, and the TMDS

outputs are high-Z. As soon as a valid TMDS clock is detected, the terminations on the TMDS data lines are

connected, the TMDS outputs come out of high-Z, and the device is fully functional and consumes the greatest

amount of power.

over recommended operating conditions (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

ICC

Normal-mode supply current

LP = HIGH TMDS: VID(pp) = 1200 mV, 3 Gbps TMDS data

170

216

pattern; HPD_SINK = HIGH, S1/S2 = LOW/HIGH, HIGH/HIGH

ISTBY

Standby supply current

LP = HIGH, TMDS: VID(pp) = 1200 mV, 3 Gbps TMDS data

5.5

pattern; HPD_SINK = HIGH, S1 = HIGH, S2 = LOW

ISD

Shutdown current

LP = LOW

300

555

µA

Normal-mode supply current,

LP = HIGH, No TMDS input clock, HPD_SINK = HIGH, S1/S2

INCLK

with no active TMDS input cloc

= LOW/HIGH, HIGH/HIGH

The TMDS261 is designed to support the hot-plug indication to the input ports (HDMI/DVI sources connected to

TMDS261) via the HPD[1:2] output pins. The state of the hot-plug output of the selected source follows the state

of the hot-plug input (HPD_SINK input pin) from the sink side. The state of the hot-plug output for the

non-selected source goes low (See Table 1).

The maximum VOH of the HPD depends on VCC. It is recommended that if VOH greater than 3.6 V is needed on

HPD, then an external circuit can be used to drive the VOH off of the +5 V from the HDMI source connected (as

shown in Figure 33).

over recommended operating conditions (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VOH(HPD)

High-level output voltage

IOH = 100 µA

VCC

VOL(HPD)

Low-level output voltage

IOL = 100 µA

0.4

High-level input current

VIH = 2 V, VCC = 3.6 V

–10

µA

Low-level input current

VIL = 0.8 V, VCC = 3.6 V

–10

µA

Output source impedance

800

1000

1200

Ω

Submit Documentation Feedback

Product Folder Link(s) :TMDS261

TMDS261 Datasheet(PDF) 10 Page - Texas Instruments

TMDS261 Datasheet(HTML) 10 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42

Datasheet Download

Link URL