TUSB1044AI datasheet(8/66 Pages) TI1

8 / 66 page

over operating free-air temperature and voltage range (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

I2C Control Pins SCL, SDA

VIH-3.3V

High-level input voltage

VCC = 3.3V; VIO_SEL = "0" or "F"; I2C

Mode Enabled;

3.6

VIL-3.3V

Low-level input voltage

VCC = 3.3V; VIO_SEL = "0" or "F"; I2C

Mode Enabled;

0.8

VIH-1.8V

High-level input voltage

VCC = 3.3V; VIO_SEL = "R" or "1"; I2C

Mode Enabled;

1.2

3.6

VIL-1.8V

Low-level input voltage

VCC = 3.3V; VIO_SEL = "R" or "1"; I2C

Mode Enabled;

0.4

VOL

Low-level output voltage

I2C_EN ! = "0"; IOL = 3mA

0.4

IOL

Low-level output current

I2C_EN ! = "0"; VOL = 0.4V

II_I2C

Input current on SDA pin

0.1 × VI2C < Input voltage < 3.3V

–10

µA

Ci_I2C

Input capacitance

0.5

USB Gen 2 Differential Receiver (UTX1P/N, UTX2P/N, DRX1P/N, DRX2P/N)

VRX-DIFF-

Input differential peak-peak voltage

swing dynamic range

AC-coupled differential peak-to-peak

signal measured post CTLE through a

reference channel

2000

mVpp

VRX-DC-

Common-mode voltage bias in the

receiver (DC)

RRX-DIFF-

Differential input impedance (DC)

Present after a GEN 2 device is detected

on TXP/TXN

120

RRX-CM-

Receiver DC common-mode impedance

Present after a GEN 2 device is detected

on TXP/TXN

ZRX-HIGH-

IMP-DC-

POS

Common-mode input impedance with

termination disabled (DC)

Present when no GEN 2 device is

detected on TXP/TXN. Measured over the

range of 0V to 500mV with respect to

GND.

kΩ

VSIGNAL-

DET-DIFF-

Input differential peak-to-peak signal

detect assert level

10Gbps PRBS7 pattern; low loss input

channel;

VRX-IDLE-

DET-DIFF-

Input differential peak-to-peak signal

detect deassert level

10Gbps PRBS7 pattern; low loss input

channel;

VRX-LFPS-

DET-DIFF-

Low-frequency Periodic Signaling (LFPS)

Detect Threshold

Below the minimum is squelched.

100

300

CRX

RX input capacitance to GND

At 5GHz

0.3

RLRX-DIFF Differential return loss

50MHz to 2.5GHz at 90Ω

–13

RLRX-DIFF Differential return loss

5GHz at 90Ω

–12

RLRX-CM Common-mode return loss

50MHz to 5GHz at 90Ω

–10.5

EQSSP

Receiver equalization at maximum setting UEQ[1:0] and DEQ[1:0] at 5GHz.

USB Gen 2 Differential Transmitter (DTX1P/N, DTX2P/N, URX1P/N, URX2P/N)

VTX-DIFF-

Transmitter dynamic differential voltage

swing range

1500

mVpp

VTX-RCV-

DETECT

Amount of voltage change allowed during

Receiver Detection

At 3.3V

600

VTX-CM-

IDLE-DELTA

Transmitter idle common-mode voltage

change while in U2/U3 and not actively

transmitting LFPS

measured at the connector side of the AC

coupling caps with 50Ω load

–600

600

VTX-DC-

Common-mode voltage bias in the

transmitter (DC)

1.75

2.3

TUSB1044A

SLLSG07 – MARCH 2025

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