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AT43301-AU

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27
19
1137J–USB–01/06
AT43301
Figure 4-8. Hub EOP Delay and EOP Skew
EOP Delay:
T
EOPD
= T
EOP
- T
HDDX
EOP Skew:
T
HESK
= T
EOP +
-T
EOP-
Low-speed timings are determined in the same way for:
T
LEOPD
and T
LHESK
CROSSOVER
POINT
EXTENDED
DOWNSTREAM
PORT
A. DOWNSTREAM EOP DELAY WITH CABLE
50% POINT OF
INITIAL SWING
UPSTREAM
END OF
CABLE
UPSTREAM
PORT
V
SS
V
SS
V
SS
V
SS
B. DOWNSTREAM EOP DELAY WITHOUT CABLE
DOWNSTREAM
PORT
UPSTREAM
PORT OR END
OF CABLE
V
SS
V
SS
C. UPSTREAM EOP DELAY WITH OR WITHOUT CABLE
T
EOP-
T
EOP+
CROSSOVER
POINT
EXTENDED
DOWNSTREAM
PORT
T
EOP-
T
EOP+
CROSSOVER
POINT
EXTENDED
CROSSOVER
POINT
EXTENDED
T
EOP-
T
EOP+
CROSSOVER
POINT
EXTENDED
20
1137J–USB–01/06
AT43301
5. Schematic Diagrams
The following pages show schematic diagrams of an AT43301 based bus-powered hub and self-
powered hub.
Figure 5-1. Bus-powered Hub
VBUS
DM1
DP1
DM2
DP2
DM3
DP3
DM4
DP4
PWR
OVC
VBUS
Y1
6.000MHz
R1
22
R222
R4
100
C2
0.01UF
C3
2.2nF
R3
1.5K
L1
FB
R7 22
R8
22
R9
22
R10
22
R11
22
R12
22
R13
22
R14 22
R5
470
D1
LED
+
C12
4.7UF
RP1
15K
116
215
314
413
512
611
710
89
C1
0.27UF
USB-B
JP1
4
3
2
1
56
R16
47K
U1
AT43301
14
15
16
17
18
19
20
21
22
23
13
2
4
5
1
3
6
8
9
10
11
7
12
24
DM0
DP0
DM1
DP1
DM2
DP2
DM3
DP3
DM4
DP4
VSS
VSS
OSC1
OSC2
VCC
CEXT
LFT
PWR
OVC
LPSTAT
TEST
STAT
SELF/BUS
NC
D2
1N4148
L11 FB
21
1137J–USB–01/06
AT43301
Figure 5-2. Bus-powered Hub
VBUS
VBUS
PWR
OVC
DP1
DM2
DM4
DM1
DP2
DM3
DP3
DP4
+
C8
47uF
+
C9
47uF
+
C10
47uF
+
C11
47uF
U2
MIC2525-2
1
2 3
7 8
5 6
4
EN
FLG GND
IN OUT
NC OUT
NC
JP3
USB-2A
1
2
3
4
5
6
7
8
9
10
11
12
L13
FB
L4
FB
C5
0.1uF
L2
FB
C4
0.1uF
L12
FB
L3 FB
C6
0.1uF
JP2
USB-2A
1
2
3
4
5
6
7
8
9
10
11
12
C7
0.1uF
L15
FB
L5
FB
L14 FB
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27

AT43301-AU

Mfr. #:
Buy AT43301-AU
Manufacturer:
Microchip Technology / Atmel
Description:
USB Interface IC USB FOUR PORT HUB GANGED
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

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