TUSB501

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SLLSEG5A – AUGUST 2013 – REVISED AUGUST 2013

AC ELECTRICAL CHARACTERISTICS

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

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Differential Receiver (RXP, RXN)

Input differential voltage swing

AC-coupled differential peak-to-peak

100

1200

signal

Common-mode voltage bias in the

3.3

V

receiver (DC)

Present after a SuperSpeed USB

Differential input impedance (DC)

72

91

120

Ω

device is detected on TXP/TXN

Common-mode input impedance

Present after a SuperSpeed USB

18

22.8

30

Ω

(DC)

device is detected on TXP, TXN

Present when no SuperSpeed USB

Common-mode input impedance

device is detected on TXP, TXN.

25

35

k

Ω

IMP-DC-POS

with termination disabled (DC)

Measured over the range of 0-500

mV with respect to GND.

Low Frequency Periodic Signaling

Below the minimum is squelched

100

300

DET-DIFF-pp

(LFPS) Detect Threshold

Differential Transmitter (TXP, TXN)

OS = Low, No load

930

Transmitter differential voltage swing

(transition-bit)

OS = High, No load

1300

Transmitter de-emphasis

DE = Floating, OS = Low

-3.5

dB

RATIO

TX input capacitance to GND

At 2.5 GHz

1.25

pF

Differential impedance of the driver

75

93

125

Ω

Common-mode impedance of the

Measured with respect to AC ground

18.75

31.25

Ω

driver

over 0-500 mV

TX short circuit current

TX ± shorted to GND

60

mA

Common-mode voltage bias in the

1.2

2.5

V

transmitter (DC)

AC common-mode voltage swing in

Within U0 and within LFPS

100

active mode

Differential voltage swing during

Tested with a high-pass filter

0

10

DIFF -AC-pp

electrical idle

Absolute delta of DC CM voltage

Restrict the test condition to meet

100

mV

DeltaU1-U0

during active and idle states

100 mV

DC electrical idle differential output

Voltage must be low pass filtered to

0

12

mV

DC

voltage

remove any AC component

Differential Transmitter (TXP, TXN)

Output rise, fall time

20%-80% of differential voltage

80

ps

see Figure 4

measured 1 inch from the output pin

20%-80% of differential voltage

Output Rise, Fall time mismatch

20

ps

measured 1 inch from the output pin

De-emphasis = -3.5 dB propagation

Differential propagation delay

delay between 50% level at input

290

ps

see Figure 2

and output

Idle entry and exit times

3.6

ns

see Figure 3

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