TUSB1106-Q1

www.ti.com

SCAS916

– AUGUST 2011

lines. The internal circuits of the TUSB1106-Q1 ensure that virtually no current (maximum 10

μA) is drawn via

the D+ and D

– lines. The power consumption through VCC(I/O) drops to the low-power (suspended) state level.

Both the VP and VM pins are driven HIGH to indicate this mode. Pin RCV is made LOW. Some hysteresis is

built into the detection of Vreg(3.3) lost.

Table 2. Pin States in Disable or Sharing Mode

PINS

DISABLE-MODE STATE

SHARING-MODE STATE

VCC(5.0)/Vreg(3.3)

5-V input/3.3-V output, 3.3-V input/3.3-V input

Not present

VCC(I/O)

Not present

1.65-V to 3.6-V input

Vpu(3.3)

High impedance (off)

High impedance (off)

D+, D

–

High impedance

High impedance

VP, VM

Invalid(1)

H

RCV

Invalid(2)

L

Inputs (VO/VPO, FSE0/VMO, SPEED,

High impedance

High impedance

SUSPND, OE, SOFTCON)

(1)

High impedance or driven LOW

(2)

High impedance or driven LOW

Table 3. Power-Supply Configuration Overview

VCC(5.0) or Vreg(3.3)

VCC(I/O)

CONFIGURATION

SPECIAL CHARACTERISTICS

Connected

Connected

Normal mode

D+, D

–, and Vpu(3.3) are in high impedance.

Connected

Not connected

Disable mode

VP, VM, and RCV are invalid.(1)

D+, D

–, and Vpu(3.3) are in high impedance.

Not connected

Connected

Sharing mode

VP and VM are driven HIGH. RCV is driven LOW.

(1)

High impedance or driven LOW

Power-Supply Input Options

The TUSB1106-Q1 has two power-supply input options.

•

Internal regulator

– VCC(5.0) is connected to 4 V to 5.5 V. The internal regulator is used to supply the internal

circuitry with 3.3 V (nominal). Vreg(3.3) becomes a 3.3-V output reference.

•

Regulator bypass

– VCC(5.0) and Vreg(3.3) are connected to the same supply. The internal regulator is bypassed

and the internal circuitry is supplied directly from the Vreg(3.3) power supply. The voltage range is

3 V to 3.6 V to comply with the USB specification.

The supply-voltage range for each input option is specified in Table 4.

Table 4. Power-Supply Input Options

INPUT OPTION

VCC(5.0)

VREG(3.3)

VCC(I/O)

Supply input for internal regulator

Voltage-reference output

Supply input for digital I/O pins

Internal regulator

(4 V to 5.5 V)

(3.3 V, 300

μA)

(1.65 V to 3.6 V)

Connected to Vreg(3.3) with

Supply input

Supply input for digital I/O pins

Regulator bypass

maximum voltage drop of 0.3 V

(3 V to 3.6 V)

(1.65 V to 3.6 V)

(2.7 V to 3.6 V)

Copyright

© 2011, Texas Instruments Incorporated

Submit Documentation Feedback

5

Product Folder Link(s): TUSB1106-Q1