XR22414DS Datasheet, PDF (9/13 Pages) Exar Corporation – USB 2.0 4-Port MTT Hub

3.3V
OVC1#
OVC2#
OVC3#
OVC4#
XR22414
PWR1#
PWR2#
PWR3#
PWR4#
ENA
OUTA
FLGA
IN
FLGB ^XRP2528 GND
ENB
OUTB
RSETA
RSETB
5V
To VBUS of
Port 1
To VBUS of
Port 2
Duplicate for
Port 3 and 4
Figure 2: Individual Power Control and Over-Current Protection Mode
XR22414
USB Hub Drivers
All Operating Systems provide a native USB hub device driver for the XR22414 device to operate. No other device drivers
are necessary for the XR22414.
Regulated 3.3V Power Output
The XR22414 internal voltage regulator provides 3.3VDC output power when the device is powered by 5V input. The 3.3V
output can be utilized by other circuitry. Refer to Electrical Characteristics on page 3 for maximum power capability.
Downstream Port LED Indicators
Four port indicator (LED1 - LED4) pins, provide status of connection of downstream devices. Ports with permanently
connected devices should ground their respective port LED indicator. Ports using LED indicators may configure status LEDs
in a number of configurations in conjunction with the DRV pin. Figure 3 and Figure 4 show alternate configurations for LED
status indicators. Green / amber LEDs in Figure 4 are implemented per USB hub specification USB 2.0 spec, chapter 11.
LED1
LED2
LED3
XR22414
LED4
DRV
Port 1 device is
non-removable
Port 2-4 devices are
removable but port LED
status is disabled
Port status LED
indicators disabled
Figure 3: Port status LED indicators disabled
REV1A
9/13