Datasheet

TUSB1105, TUSB1106
SCAS818E –MAY 2006–REVISED SEPTEMBER 2010 www.ti.com
Table 5. Receiving Function (Pin OE = H)
DATA STATE
D+, D– RCV VP
(1)
VM
(1)
LOW FULL
SPEED SPEED
Differential
L L H J K
logic 0
Differential
H H L K J
logic 1
SE0 RCV*
(2)
L L X X
(1) VP = VM = H indicates the sharing mode (V
CC(5.0)
and V
reg(3.3)
are
disconnected).
(2) RCV* denotes the signal level on output RCV just before SE0 state
occurs. This level is stable during the SE0 period.
Power-Supply Configurations
The TUSB1105/1106 can be used with different power-supply configurations, which can be dynamically changed.
An overview is given in Table 7.
• Normal mode – Both V
CC(I/O)
and V
CC(5.0)
or (V
CC(5.0)
and V
reg(3.3)
) are connected. For 5-V operation, V
CC(5.0)
is
connected to a 5-V source (4 V to 5.5 V). The internal voltage regulator then produces 3.3 V for the USB
connections. For 3.3-V operation, both V
CC(5.0)
and V
reg(3.3)
are connected to a 3.3-V source (3 V to 3.6 V).
V
CC(I/O)
is independently connected to a voltage source (1.65 V to 3.6 V), depending on the supply voltage of
the external circuit.
• Disable mode – V
CC(I/O)
is not connected, V
CC(5.0)
or (V
CC(5.0)
and V
reg(3.3)
) are connected. In this mode, the
internal circuits of the TUSB1105 and TUSB1106 ensure that the D+ and D– pins are in 3-state and the
power consumption drops to the low-power (suspended) state level. Some hysteresis is built into the
detection of V
CC(I/O)
lost.
• Sharing mode – V
CC(I/O)
is connected, (V
CC(5.0)
and V
reg(3.3)
) are not connected. In this mode, the D+ and D–
pins are made 3-state and the TUSB1105 and TUSB1106 allow external signals of up to 3.6 V to share the
D+ and D– lines. The internal circuits of the TUSB1105 and TUSB1106 ensure that virtually no current
(maximum 10 mA) is drawn via the D+ and D– lines. The power consumption through V
CC(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 V
reg(3.3)
lost.
Table 6. Pin States in Disable or Sharing Mode
PINS DISABLE-MODE STATE SHARING-MODE STATE
V
CC(5.0)
/V
reg(3.3)
5-V input/3.3-V output, 3.3-V input/3.3-V input Not present
V
CC(I/O)
Not present 1.65-V to 3.6-V input
V
pu(3.3)
High impedance (off) High impedance (off)
D+, D– High impedance High impedance
VP, VM Invalid
(1)
H
RCV Invalid
(1)
L
Inputs (VO/VPO, FSE0/VMO, SPEED,
High impedance High impedance
MODE
(2)
, SUSPND, OE, SOFTCON)
(1) High impedance or driven LOW
(2) TUSB1105 only
Table 7. Power-Supply Configuration Overview
V
CC(5.0)
or V
reg(3.3)
V
CC(I/O)
CONFIGURATION SPECIAL CHARACTERISTICS
Connected Connected Normal mode
D+, D–, and V
pu(3.3)
are in high impedance.
Connected Not connected Disable mode
VP, VM, and RCV are invalid.
(1)
D+, D–, and V
pu(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
6 Submit Documentation Feedback Copyright © 2006–2010, Texas Instruments Incorporated
Product Folder Link(s): TUSB1105 TUSB1106