TUSB1106RGTR datasheet(4/34 Pages) TI

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TUSB1105, TUSB1106

ADVANCED UNIVERSAL SERIAL BUS TRANSCEIVERS

SCAS818D – MAY 2006 – REVISED FEBRUARY 2008

TERMINAL FUNCTIONS (continued)

TERMINAL

TUSB1105

TUSB1106

I/O

DESCRIPTION

PIN NO.

NAME(1)

RGT

RTZ

GND

Die pad

Ground supply(2)

Supply voltage for digital I/O pins (1.65 to 3.6 V). When VCC(I/O) is not

connected, the D+ and D– pins are in 3-state. This supply pin is

VCC(I/O)

independent of VCC(5.0) and Vreg(3.3) and must never exceed the Vreg(3.3)

voltage.

Speed selection (CMOS level with respect to VCC(I/O)). Adjusts the slew rate

of differential data outputs D+ and D– according to the transmission speed.

SPEED

Input pad, push pull, CMOS.

LOW – low speed (1.5 Mbit/s)

HIGH – full speed (12 Mbit/s)

Negative USB data bus connection (analog, differential). For low-speed

D–

AI/O

mode, connect to pin Vpu(3.3) via a 1.5-kΩ resistor.

Positive USB data bus connection (analog, differential). For full-speed

D+

AI/O

mode, connect to pin Vpu(3.3) via a 1.5-kΩ resistor.

VPO/VO

Driver data (CMOS level with respect to VCC(I/O), Schmitt trigger). See

Driving Function Table (pin OE = L) using single-ended input data interface

for TUSB1105 (pin MODE = L), and Driving Function Table (pin OE = L)

VPO

using differential input data interface for TUSB1105 (pin MODE = H) and

TUSB1106 input pad. Push pull, CMOS.

VMO/FSE0

Driver data (CMOS level with respect to VCC(I/O), Schmitt trigger). See

Driving Function Table (pin OE = L) using single-ended input data interface

for TUSB1105 (pin MODE = L), and Driving Function Table (pin OE = L)

VMO

using differential input data interface for TUSB1105 (pin MODE = H) and

TUSB1106 input pad. Push pull, CMOS.

Internal regulator option. Regulated supply-voltage output (3 V to 3.6 V)

during 5-V operation. A decoupling capacitor of at least 0.1 mF is required

Vreg(3.3)

for the regulator bypass option. Used as a supply-voltage input for

3.3 V ± 10% operation.

Internal regulator option. Supply-voltage input (4 V to 5.5 V). Can be

VCC(5.0)

connected directly to USB supply VBUS regulator bypass option. Connect

to Vreg(3.3).

Pullup supply voltage (3.3 V ± 10%). Connect an external 1.5-k

Ω resistor on

D+ (full speed) or D– (low speed). Pin function is controlled by input

SOFTCON.

Vpu(3.3)

SOFTCON = LOW – Vpu(3.3) floating (high impedance), ensures zero pullup

current

SOFTCON = HIGH – Vpu(3.3) = 3.3 V, internally connected to Vreg(3.3)

Software-controlled USB connection. A HIGH level applies 3.3 V to pin

Vpu(3.3), which is connected to an external 1.5-kΩ pullup resistor. This allows

SOFTCON

USB connect/disconnect signaling to be controlled by software input pad.

Push pull, CMOS.

(2)

TUSB1105 ground terminal is connected to the exposed die pad (heat sink). The package die pad is open on the TUSB1106.

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