0 V

VBUS_THR

VVBUS

Time

tVBUS_DB

6

TUSB321AI

SLLSER2A – OCTOBER 2015 – REVISED MAY 2017

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Electrical Characteristics (continued)

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

PARAMETER

TEST

CONDITIONS

MIN

TYP

MAX

UNIT

RP(ODext)

External pullup resistor on open drain IOs

(VCONN_FAULT, ID, OUT1, OUT2, DIR)

200

kΩ

RP(TLext)

Tri-level input external pull-up resistor (PORT)

4.7

kΩ

RP(cm_med)

External pull-up resistor on CURRENT_MODE pin to

advertise 1.5-A current

500

kΩ

RP(cm_high)

External pull-up resistor on CURRENT_MODE pin to

advertise 3.0-A current

10

kΩ

VBUS_DET IO Pins (Connected to System VBUS signal through external resistor)

VBUS(THR)

VBUS threshold range

2.95

3.30

3.80

V

RVBUS

External resistor between VBUS and VBUS_DET pin

855

887

920

KΩ

R(VBUS_PD)

Internal pulldown resistance for VBUS_DET

95

KΩ

VCONN

RON

On resistance of the VCONN power FET

1.25

Ω

V(TOL)

Voltage tolerance on VCONN power FET

5.5

V

V(PASS)

Voltage to pass through VCONN power FET

5.5

V

I(VCONN)

VCONN current limit; VCONN is disconnected above this

value

225

300

375

mA

CBULK

Bulk capacitance on VCONN; placed on VDD supply

10

200

µF

6.6 Switching Characteristics

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

PARAMETER

MIN

TYP

MAX

UNIT

tCCCB_DEFAULT

Power on default of CC1 and CC2 voltage debounce time

168

ms

tVBUS_DB

Debounce of VBUS_DET pin after valid V(BUS_THR) (See Figure 1.)

2

ms

tDRP_DUTY_CYCLE

Power-on default of percentage of time DRP advertises DFP during a TDRP

30%

tDRP

The period TUSB321AI in DRP mode completes a DFP to UFP and back

advertisement.

50

75

100

ms

Figure 1. VBUS Detect and Debounce