TUSB1104 datasheet(9/55 Pages) TI

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5.7 USB Electrical Characteristics

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

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

USB Gen 2 Differential Receiver (CRX1p/n, CRX2p/n, SSTX1p/n, SSTX2p/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

1200

mVpp

V(RX-DC-CM)

Common-mode voltage bias in the

receiver (DC)

VRX_CM-INST

Max Instantaneous RX DC common

mode voltage change under all

operating conditions (OFF to ON,

Disabled to USB, etc…)

Measured at non-device side of AC

coupling capacitor with 200-kΩ load.

-300

500

R(RX-DIFF-DC)

Differential input impedance (DC)

Present after a GEN2 device is detected.

120

R(RX-CM-DC)

Receiver DC common mode

impedance

Present after a GEN2 device is detected.

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

Common-mode input impedance with

termination disabled (DC)

Present when no GEN2 device is detected

on transmitter.

Measured over the range of 0 – 500 mV

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;

RL(RX-DIFF)

Differential return Loss

50 MHz – 1.25 GHz at 85 Ω;

-22

5 GHz at 85 Ω;

-20

RL(RX-CM)

Common-mode return loss

50 MHz – 5 GHz at 85 Ω;

-12

EQ_SSTX15

SSTX1->CTX1 Receiver equalization

at 5 GHz

SSEQ1_SEL = 15; Gain at 5 GHz minus

Gain at 10 MHz;

13.6

EQ_RX15

CRX1 -> SSRX1 Receiver

equalization at 5 GHz

CEQ1_SEL = 15; Gain at 5 GHz minus

Gain at 10 MHz;

12.7

CAC-USB1

Required external AC capacitor on

SSTX1/2

265

CAC-USB2

Optional external AC capacitor on

CRX1 and CRX2.

297

363

USB Gen 2 Differential Transmitter (CTX1p/n, CTX2p/n, SSRX1p/n, SSRX2p/n)

VTX(DIFF-PP)

Transmitter dynamic differential

voltage swing range.

EQ15; VID = 1Vpp; LINR_L3

1200

mVpp

VTX(RCV-DETECT)

Amount of voltage change allowed

during receiver detection

600

VTX-CM-INST-ONOFF

Max Instantaneous TX DC common

mode voltage change under operating

condition: OFF to ON, ON to OFF,

during Rx.Detect; Disconnect to U0,

U2/U3 to Disconnect.

Measured single-ended at non-device side

of AC coupling capacitor with 200-kΩ

load.

-500

800

VTX(CM-IDLE-DELTA)

Transmitter idle common-mode

voltage change while in U2/U3 and not

actively transmitting LFPS

–300

600

VTX(DC-CM)

Common-mode voltage bias in the

transmitter (DC)

0.5

0.76

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(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

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