STIR4200 SigmaTel, STIR4200 Datasheet - Page 6

• Manufacturer Part Number: STIR4200
• Description: USB / IrDA Bridge Controller
• Manufacturer: SigmaTel

STIr4200
USB/IrDA Bridge Controller
4. FUNCTIONAL DESCRIPTION
6
Symbol
V
V
V
V
3.3.
4.1.
RXDH
I
I
RXDL
TXDH
TXDL
CC
CC
Electrical Characteristics
Overview
Active Supply Current
Suspend Supply Current
Receive Data Logic High
Receive Data Logic Low
Transmit Data Logic High
Transmit Data Logic Low
USB
V+
D+
D-
GND
T
The STIr4200 consists of two major functional blocks, the USB controller and the
digital IR transceiver. The USB controller provides a Control, Bulk-In, and Bulk- Out
endpoints to the USB host. The digital IR transceiver consists of a transmit and
receive interface that connects to an analog IR front end. Figure 1shows a block dia-
gram of the device.
This USB/IrDA Bridge Controller has full interface capability to connect between a
USB bus , and an IrDA-compatible infrared transceiver device. A simplified sche-
matic of this arrangement is shown in Figure 2.
A
Parameter
= 25 ° C
A
V
DD
Table 3. Electrical Characteristics
Figure 2. Typical USB-IR Application
= 3.3V unless otherwise specified. Cap Load = 50pF
STIr4200S
Controller
USB-IrDA
Bridge
V
V
DD
DD
MIN
x 0.8
x 0.6
Vcc
GND
RXD
TXD
SD
TYP
12
14
V
DD
Voltage
Regulator
MAX
0.8
19
50
x 0.4
UNITS
mA
µA
V
V
V
V
3-4200-D1-2.0-0403
CONDITION