TUSB1044 datasheet(8/67 Pages) TI1

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TUSB1044

SLLSF47A – FEBRUARY 2018 – REVISED FEBRUARY 2018

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Electrical Characteristics (continued)

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

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VOL

Low-level output voltage

I2C_EN ! = 0; IOL = 3 mA

0.4

IOL

Low-level output current

I2C_EN ! = 0; VOL = 0.4 V

II_I2C

Input current on SDA pin

0.1*VI2C < Input voltage < 3.3 V

-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 0-500 mV with respect to

GND.

kΩ

VSIGNAL-

DET-DIFF-

Input Differential peak-to-peak Signal

Detect Assert Level

10 Gbps PRBS7 pattern; low loss input

channel;

VRX-IDLE-

DET-DIFF-

Input Differential peak-to-peak Signal

Detect De-assert Level

10 Gbps 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 5 GHz

0.3

RLRX-

DIFF

Differential Return Loss

50 MHz – 2.5 GHz at 90 Ω

-13

RLRX-

DIFF

5 GHz at 90 Ω

-12

RLRX-CM

Common Mode Return Loss

50 MHz – 5 GHz at 90 Ω

-10.5

EQSSP

Receiver equalization at maximum

setting

UEQ[1:0] and DEQ[1:0]. at 5 GHz.

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 3.3 V

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 50 ohm load

-600

600

VTX-DC-

Common-mode voltage bias in the

transmitter (DC)

1.75

2.3

VTX-CM-

AC-PP-

ACTIVE

Tx AC Common-mode voltage active

Rx EQ setting matches input channel

loss; Max mismatch from Txp + Txn for

both time and amplitude; -40

℃ to 85℃;

100

mVpp

VTX-IDLE-

DIFF-AC-

AC Electrical idle differential peak-to-

peak output voltage

At package pins

VTX-IDLE-

DIFF-DC

DC Electrical idle differential output

voltage

At package pins after low-pass filter to

remove AC component

RTX-DIFF

Differential impedance of the driver

120

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