SN75DP129RHHT datasheet(9/28 Pages) TI

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Hot Plug and Cable Adapter Detect

ELECTRICAL CHARACTERISTICS

SWITCHING CHARACTERISTICS

DP129

100kW

HPDInput

HPDOutput

100kW

tPD(HPD)

50%

VDD

HPD_IN

HPD_OUT

AUX / I

2C Pins

SN75DP129

SLAS583A – JANUARY 2008 – REVISED MARCH 2008

The SN75DP129 has a built-in level shifter for the HPD outputs. The output voltage level of the HPD pin is

defined by the voltage level of the VDD pin.

over recommended operating conditions (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VOH3.3

IOH = –100 µA, VDD×1 = 3.3 V

3.3

VOH2.5

High-level output voltage

IOH = –100 A, VDD×1 = 2.5 V

2.25

2.5

VOH1.8

IOH = –100 A, VDD×1 = 1.8 V

1.62

1.8

VOL

Low-level output voltage

IOH = 100 µA

0.4

High-level input current

VIH = 2.0 V, VDD = 3.6 V

–10

µA

Low-level input current

VIL = 0.8 V, VDD = 3.6 V

–10

µA

over recommended operating conditions (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

tPD(HPD)

Propagation delay

VDD = 3.6 V

Figure 6. HPD Test Circuit

Figure 7. HPD Timing Diagram

The SN75DP129 utilizes an active I2C repeater. The repeater isolates the parasitic effects of the system to aid

with system level compliance.

In addition to the I2C repeater, the SN75DP129 supports the connector detection I2C register. This register is

enabled using the I2C_EN pin. When active, an internal memory register is readable using the AUX_I2C pins.

This I2C register block functionality is described in the APPLICATION INFORMATION section.

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