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AT43USB301-SC Datasheet

  • AT43USB301-SC

  • Low-cost USB Hub Controller(261.97 k)

  • 250.83KB

  • 21頁(yè)

  • ETC

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Features
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Full Compliance with USB Spec Rev 1.1
Four Downstream Ports
Full-speed and Low-speed Data Transfers
Bus-powered Controller
Bus-powered or Self-powered Hub Operation
Port Overcurrent Monitoring
Port Power Switching
5V Operation with On-chip 3.3V Regulator
24-pin SOIC
Description
The AT43301 is a 5-port USB hub chip supporting one upstream and four down-
stream ports. The AT43301 connects to an upstream hub or host/root hub via Port0,
while the other ports connect to external downstream USB devices. The hub re-trans-
mits the USB differential signal between Port0 and Ports[1:4] in both directions. The
AT43301 is designed for very low-cost bus-powered or self-powered hub applications
and comes in a 24-pin SOIC package.
The AT43301 supports the 12 Mb/s full speed as well as 1.5 Mb/s slow speed USB
transactions. To reduce EMI, the AT43301鈥檚 oscillator frequency is 6 MHz even
though some internal circuitry operates at 48 MHz.
Low-cost USB
Hub Controller
AT43301
Pin Configurations
Top View
VCC
VSS
CEXT1
OSC1
OSC2
LFT
STAT
PWR
OVC
LPSTAT
TEST
SELF/BUS
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
NC
DP4
DM4
DP3
DM3
DP2
DM2
DP1
DM1
DP0
DM0
VSS
Rev. 1137C鈥?8/99
1

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