TUSB422 datasheet(7/71 Pages) TI1

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TUSB422

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SLLSEW6 – NOVEMBER 2016

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Electrical Characteristics (continued)

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

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VCONN

RDS(ON)

ON resistance of the VCONN power FET.

0.4

0.75

V(PASS)

Voltage to pass through VCONN power FET

I(VCONN)

VCONN current limit; VCONN is

disconnected above this voltage.

500

650

850

V(VCONN_PRES)

Threshold for detecting Vconn present.

2.4

C(VCONN)

Bulk capacitance on VCONN; Placed on

VCONN pin supply

200

µF

R(VCONN_DIS)

Resistance to GND when Vconn discharge

is enabled

4.6

5.1

5.6

KΩ

VBUSIN

C(BULK_SRC)

Source External bulk capacitance when

operating as VBUS Source.

150

µF

C(SNK)

Sink External bulk capacitance on VBUS at

connector

µF

C(SNKPD)

Sink External bulk capacitance on VBUS

after success PD negotiation

100

µF

R(BLEED)

Resistance to gnd when bleed discharge is

enabled

12.5

KΩ

V(SRCSLEWNEG)

VBUS discharge maximum slew rate

–30

mV/µs

V(VBUS_MEASURE_ACC)

VBUS_VOLTAGE register measurement

accuracy

–2%

OTSD

T(OTSD1)

TJ over temperature trip threshold resulting

in VCONN turn off and flag set.

150

°C

6.6 Timing Requirements

MIN

NOM

MAX

UNIT

CC pins in PD mode

Fbr_PD

Bit Rate

270

300

330

Kbps

tUI_PD

Unit Interval

3.03

3.3

3.7

µs

tRISE_PD

Rise time

10% to 90%; CRX(SHUNT) = 200 pF

300

tFALL_PD

Fall time

90% to 10%; CRX(SHUNT) = 200 pF

300

tRxFilter

Rx Bandwidth limiting filter

100

tInterFrameCap

Time from the end of last bit of a frame

until the state of the first bit of the next

pre-amble

µs

tStartDrive

Time before the start of the first bit of

the preamble when the transmitter

shall start driving the line.

-1

µs

tEndDriveBMC

Time to cease driving the line after the

end of the last bit of a frame

µs

tHoldLowBMC

Time to cease driving the line after the

final high-to-low transition

µs

nTransitionCount

Transitions for signal detect

Number of transitions to be detected to

declare bus non-idle

tFRSWAPTX

Fast Role Swap request transmit

duration

120

µs

tFRSWAPRX

Fast Role Swap detection time

µs

I2C (SDA and SCL)

FSCL

SCL clock frequency

0.001

MHz

tHD;STA

Hold time (repeated) start condition

0.26

µs

tLOW

Low period of SCL

0.5

µs

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