XR22417 Datasheet, PDF (4/17 Pages) Exar Corporation – USB 2.0 7-Port Hub

XR22417
Pin Functions
LQFP-48 LQFP-64
Pin Number Pin Number
48
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
11
-
12
-
13
-
14
-
15
15
16
11
17
12
18
-
19
13
20
14
21
-
22
16
23
17
24
-
25
18
26
19
27
20
28
21
29
22
30
23
31
Pin Name
LED5
LED_CTL
TEST#/SDA
LED1/SCL
LED2
LED3
VCC18
LED4
VCC5
3V3_OUT
GND
PWR3#
OVC3#
PWR4#
OVC4#
VCC33
DM4
DP4
GND
DM3
DP3
VCC33
DM2
DP2
GND
DM1
DP1
VCC33
VCC18
XTALIN
XTALOUT
Type Description
O Port 5 LED indicator. May be used in conjunction with LED_CTL pin.
O LED hub active indicator. May be used in conjunction with port status LEDs.
I/O OD
Test mode enable. Active low and I²C serial data. Leave unconnected for normal device
operation if no external EEPROM is used.
I/O OD Port 1 LED indicator and I²C serial clock. May be used in conjunction with LED_CTL pin.
O Port 2 LED indicator. May be used in conjunction with LED_CTL pin.
O Port 3 LED indicator. May be used in conjunction with LED_CTL pin.
PWR 1.8V power input.
O Port 4 LED indicator. May be used in conjunction with LED_CTL pin.
PWR
PWR
PWR
OD
I
OD
I
5V power input.
3.3V power output from internal 5V to 3.3V regulator. Must be decoupled with minimum
of 10 µF.
Ground.
Power enable for port 3 downstream device, active low. Asserted if OVC3# input is
asserted or device is not configured.
Downstream port 3 over current indicator, active low.
Power enable for port 4 downstream device, active low. Asserted if OVC4# input is
asserted or device is not configured.
Downstream port 4 overcurrent indicator, active low.
PWR 3.3V power input.
I/O Downstream port 4 USBD- data.
I/O Downstream port 4 USBD+ data.
PWR Ground.
I/O Downstream port 3 USBD- data.
I/O Downstream port 3 USBD+ data.
PWR 3.3V power input.
I/O Downstream port 2 USBD- data.
I/O Downstream port 2 USBD+ data.
PWR Ground.
I/O Downstream port 1 USBD- data.
I/O Downstream port 1 USBD+ data.
PWR 3.3V power input.
PWR 1.8V power input.
I
12 MHz ± 50 ppm crystal input with load capacitance rating of 16-20 pF.
O 12 MHz crystal feedback output.
NOTE:
Type: I = Input, O = Output, I/O = Input/Output, PWR = Power, OD = Open-Drain.
REV1A
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