TUSB1104 datasheet(10/55 Pages) TI

10 / 55 page

5.7 USB Electrical Characteristics (continued)

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

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

RTX(CM)

Common-mode impedance of the

driver

Measured with respect to AC ground over

0–500 mV

VSSRX-LIMITED-VODL0

SSRX differential peak-to-peak

voltage when configured for limited

redriver and LINR_L0

TX_PRESHOOT_EN = 0;

TX_DEEMPHASIS_EN = 0;

750

mVpp

VSSRX-LIMITED-VODL1

SSRX differential peak-to-peak

voltage when configured for limited

redriver and LINR_L1

TX_PRESHOOT_EN = 0;

TX_DEEMPHASIS_EN = 0;

900

mVpp

VSSRX-LIMITED-VODL2

SSRX differential peak-to-peak

voltage when configured for limited

redriver and LINR_L2

TX_PRESHOOT_EN = 0;

TX_DEEMPHASIS_EN = 0;

1000

mVpp

VSSRX-LIMITED-VODL3

SSRX differential peak-to-peak

voltage when configured for limited

redriver and LINR_L3

TX_PRESHOOT_EN = 0;

TX_DEEMPHASIS_EN = 0;

1100

mVpp

VSSRX-DE-RATIO0

SSRX de-emphasis when configured

for limited redriver and de-emphasis

enabled.

TX_PRESHOOT_EN = 0;

TX_DEEMPHASIS_EN = 1;

TX_DEEPHASIS = 2'b00;

USB_SSRX_VOD = 2'b00 (LINR_L3);

Refer to Figure 6-7

-1.8

VSSRX-DE-RATIO1

SSRX de-emphasis when configured

for limited redriver and de-emphasis

enabled.

TX_PRESHOOT_EN = 0;

TX_DEEMPHASIS_EN =

1; TX_DEEPHASIS =

2'b01; USB_SSRX_VOD = 2'b00

(LINR_L3); Refer to Figure 6-7

-2.1

VSSRX-DE-RATIO2

SSRX de-emphasis when configured

for limited redriver and de-emphasis

enabled.

TX_PRESHOOT_EN = 0;

TX_DEEMPHASIS_EN =

1; TX_DEEPHASIS =

2'b10; USB_SSRX_VOD = 2'b00

(LINR_L3); Refer to Figure 6-7

-3.2

VSSRX-DE-RATIO3

SSRX de-emphasis when configured

for limited redriver and de-emphasis

enabled.

TX_PRESHOOT_EN = 0;

TX_DEEMPHASIS_EN =

1; TX_DEEPHASIS =

2'b11; USB_SSRX_VOD = 2'b00

(LINR_L3); Refer to Figure 6-7

-3.8

VSSRX-PRESH-RATIO0

SSRX pre-shoot level when configured

for limited redriver and pre-shoot

enabled.

TX_PRESHOOT_EN = 1;

TX_DEEMPHASIS_EN =

0; TX_PRESHOOT =

2'b00; USB_SSRX_VOD = 2'b00

(LINR_L3); Refer to Figure 6-6

1.6

VSSRX-PRESH-RATIO1

SSRX pre-shoot level when configured

for limited redriver and pre-shoot

enabled.

TX_PRESHOOT_EN = 1;

TX_DEEMPHASIS_EN =

0; TX_PRESHOOT =

2'b01; USB_SSRX_VOD = 2'b00

(LINR_L3); Refer to Figure 6-6

2.1

VSSRX-PRESH-RATIO2

SSRX pre-shoot level when configured

for limited redriver and pre-shoot

enabled.

TX_PRESHOOT_EN = 1;

TX_DEEMPHASIS_EN =

0; TX_PRESHOOT =

2'b10; USB_SSRX_VOD = 2'b00

(LINR_L3); Refer to Figure 6-6

2.5

VSSRX-PRESH-RATIO3

SSRX pre-shoot level when configured

for limited redriver and pre-shoot

enabled.

TX_PRESHOOT_EN = 1;

TX_DEEMPHASIS_EN =

0; TX_PRESHOOT =

2'b11; USB_SSRX_VOD = 2'b00

(LINR_L3); Refer to Figure 6-6

3.0

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 85 Ω

-28

RLTX(CM)

Common-mode return loss

50 MHz – 5 GHz at 85 Ω

-12

CTX-AC(COUPLING)

External required AC coupling

capacitor

265

AC Characteristics

Crosstalk_CRXTX

Differential crosstalk between CTX1/2

and CRX1/2 signal pairs

85 Ω; At 5 GHz; SSEQ[1:0] = 0; CEQ[1:0]

= 0;

-40

TUSB1104

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