TUSB1046AI-DCI datasheet(7/48 Pages) TI1

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TUSB1046A-DCI

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SLLSF13 – JUNE 2017

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6.7 AC Electrical Characteristics

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

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

USB Gen 2 Differential Receiver (RX1P/N, RX2P/N, SSTXP/N)

V(RX-DIFF-PP)

Input differential peak-peak voltage

swing linear dynamic range

AC-coupled differential peak-to-peak

signal measured post CTLE through a

reference channel

2000

mVpp

V(RX-DC-CM)

Common-mode voltage bias in the

receiver (DC)

R(RX-DIFF-DC)

Differential input impedance (DC)

Present after a GEN2 device is

detected on TXP/TXN

120

R(RX-CM-DC)

Receiver DC common mode

impedance

Present after a GEN2 device is

detected on TXP/TXN

Z(RX-HIGH-IMP-DC-POS)

Common-mode input impedance with

termination disabled (DC)

Present when no GEN2 device is

detected on TXP/TXN. Measured over

the range of 0-500mV with respect to

GND.

kΩ

V(SIGNAL-DET-DIFF-PP)

Input differential peak-to-peak signal

detect assert level

At 10 Gbps, no input loss, PRBS7

pattern

V(RX-IDLE-DET-DIFF-PP)

Input differential peak-to-peak signal

detect de-assert Level

At 10 Gbps, no input loss, PRBS7

pattern

V(RX-LFPS-DET-DIFF-PP)

Low frequency periodic signaling

(LFPS) detect threshold

Below the minimum is squelched

100

300

V(RX-CM-AC-P)

Peak RX AC common-mode voltage

Measured at package pin

150

C(RX)

RX input capacitance to GND

At 5 GHz

0.5

RL(RX-DIFF)

Differential return Loss

50 MHz – 1.25 GHz at 90 Ω

–19

5 GHz at 90 Ω

–10

RL(RX-CM)

Common-mode return loss

50 MHz – 5 GHz at 90 Ω

–10

EQ(SS_TX)

Receiver equalization for upstream

facing port

SSEQ[1:0] at 5 GHz

EQ(SS_RX)

Receiver equalization for downstream

facing ports

EQ[1:0] at 5 GHz

USB Gen 2 Differential Transmitter (TX1P/N, TX2P/N, SSRXP/N)

VTX(DIFF-PP)

Transmitter dynamic differential voltage swing range.

1600

mVPP

VTX(RCV-DETECT)

Amount of voltage change allowed during receiver detection

600

VTX(CM-IDLE-DELTA)

Transmitter idle common-mode voltage change while in U2/U3 and not actively

transmitting LFPS

–600

600

VTX(DC-CM)

Common-mode voltage bias in the transmitter (DC)

1.75

VTX(CM-AC-PP-ACTIVE)

Tx AC common-mode voltage active

Max mismatch from Txp + Txn for both

time and amplitude

100

mVPP

VTX(IDLE-DIFF-AC-PP)

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

VTX(CM-DC-ACTIVE-IDLE-

DELTA)

Absolute DC common-mode voltage

between U1 and U0

At package pin

200

RTX(DIFF)

Differential impedance of the driver

120

CAC(COUPLING)

AC coupling capacitor

265

RTX(CM)

Common-mode impedance of the

driver

Measured with respect to AC ground

over

0–500 mV

ITX(SHORT)

TX short circuit current

TX± shorted to GND

CTX(PARASITIC)

TX input capacitance for return loss

At package pins, at 5 GHz

1.25

RLTX(DIFF)

Differential return loss

50 MHz – 1.25 GHz at 90 Ω

-15

5 GHz at 90 Ω

-13

RLTX(CM)

Common-mode return loss

50 MHz – 5 GHz at 90 Ω

-13

AC Characteristics

Crosstalk

Differential crosstalk between TX and

RX signal pairs

at 5 GHz

–30

C(P1dB-LF)

Low frequency 1-dB compression

point

at 100 MHz, 200 mVPP < VID

< 2000 mVPP

1300

mVPP

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