Datasheet

MAX4999
USB 2.0 Hi-Speed Differential
8:1 Multiplexer
_______________________________________________________________________________________ 9
GND
V
CC
+3.3V
USB7
+
-
D7_1
D7_0
USB6
+
-
D6_1
D6_0
USB5
+
-
D5_1
D5_0
25
26
28
29
31
32
USB0
+
-
D0_1
D0_0
USB1
+
-
D1_1
D1_0
USB2
+
-
D2_1
D2_0
16
15
13
12
10
9
USB3
+
-
D3_1 D3_0
USB4
-+
D4_0 D4_1
23 22 19 18
COMMON
-
+
453678
EN C0 C1 C2
1, 11, 14, 17,
21, 24, 27, 30
MAX4999
2, 20
Figure 4. The MAX4999 Multiplexes Between Eight Differential Channels (8:1)
USB D+, D- MUST BE REVERSED IF DEVICES ARE CONNECTED AS SHOWN,
THIS IS TRUE OF D0_ _ TO D7_ _. C0, C1, C2 ARE CONNECTED IN PARALLEL.
EN0 AND EN1 ARE USED TO SELECT BETWEEN DEVICE 0 AND DEVICE 1.
ONE PAIR SHOWN
+
-
16 15
D20
+
-
15 16
D20
4
5
1
8
5
4
1
+
+
C2 C1 C0 EN0 EN1
6
7
8
USB TYPE A
COMMON
7
6
3
3
MAX4999
DEVICE 0
MAX4999
DEVICE 1
Figure 5. Combining Two MAX4999 Devices for 16:1 USB Connections