6

TUSB522P

SLLSEV9A – JULY 2016 – REVISED OCTOBER 2016

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6.7 Electrical Characteristics, AC

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

signal measured post CTLE through a

reference channel

100

1200

mVpp

Common-mode voltage bias in the

receiver (DC)

0.7

V

Differential input impedance (DC)

Present after a GEN1 device is

detected on TXP/TXN

72

120

Ω

Receiver DC Common Mode

impedance

18

30

Ω

Common-mode input impedance with

termination disabled (DC)

Present when no GEN1 device is

detected on TXP/TXN. Measured over

the range of 0-500 mV with respect to

GND.

25

kΩ

Input Differential peak-to-peak Signal

Detect Assert Level

At 5 Gbps, no input channel loss clock

pattern

85

mV

Input Differential peak-to-peak Signal

Detect De-assert Level

85

mV

Low Frequency Periodic Signaling

(LFPS) Detect Threshold

Below the minimum is squelched.

100

300

mV

Peak RX AC common mode voltage

Measured at package pin

150

mV

Voltage change to allow receiver detect

Positive voltage to sense receiver

termination

600

mV

Voltage change to allow receiver detect

At 2.5 GHz

0.17

0.63

0.99

pF

Differential Return Loss

50 MHz – 1.25 GHz at 90 Ω

–19

dB

2.5 GHz at 90 Ω

–14

dB

Common Mode Return Loss

50 MHz – 1.25 GHz at 90 Ω

–13

dB

Differential Transmitter (TXP, TXN)

Transmitter differential voltage swing

(transition-bit)

OS Low, 0dB DE

0.8

0.9

Vpp

OS High, 0dB DE

1.1

1.2

Vpp

LFPS differential voltage swing

OS Low, High

0.8

1.2

Vpp

Transmitter differential voltage De-

Emphasis ratio

DE = Low

0

dB

DE = Floating

–3.5

dB

DE = High

–6.2

dB

Amount of voltage change allowed

during Receiver Detection

600

mV

Transmitter idle common-mode voltage

change while in U2/U3 and not actively

transmitting LFPS

–600

600

mV

Common-mode voltage bias in the

transmitter (DC)

0.7

V

Tx AC Common-mode voltage active

Max mismatch from Txp + Txn for both

time and amplitude

100

mVpp

AC Electrical idle differential peak-to-

peak output voltage

At package pins

0

10

mV

DC Electrical idle differential output

voltage

At package pins after low pass filter to

remove AC component

0

10

mV

DELTA)

Absolute DC common mode voltage

between U1 and U0

At package pin

200

mV

TX input capacitance to GND

At 2.5 GHz

1.25

pF

Differential impedance of the driver

72

120

Ω

Common-mode impedance of the

driver

Measured with respect to AC ground

over 0-500 mV

18

30

Ω

TX short circuit current

TX± shorted to GND

60

mA

TX input capacitance for return loss

Package Pins

0.63

1.02

F

Differential Return Loss

50 MHz – 1.25 GHz at 90 Ω

12

dB

1.25 – 2.5 GHz at 90 Ω

8

dB