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參數(shù)資料
| 型號： | AT43301-AC |
| 廠商： | ATMEL CORP |
| 元件分類： | 總線控制器 |
| 英文描述： | Low-cost USB Hub Controller |
| 中文描述： | UNIVERSAL SERIAL BUS CONTROLLER, PQFP32 |
| 封裝： | 7 X 7 MM, 1.40 MM THICKNESS, 0.80 MM PITCH, PLASTIC, MS-026BBA, LQFP-32 |
| 文件頁數(shù)： | 11/27頁 |
| 文件大?。?/td> | 206K |
| 代理商： | AT43301-AC |
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11
1137J–USB–01/06
AT43301
For proper operation of the PLL, an external RC filter consisting of a series RC network of 100
and 10 nF in parallel with a 2 nF capacitor must be connected from the LFT pin to V
SS
.
2.8
Status Pin
The status pin, STAT, is provided to allow feedback to the user. If an LED and a series resistor is
connected between STAT and VCC, the LED will light when the hub is enumerated. During an
overcurrent condition, the LED will blink. It will continue to blink until the host turns off the power
to the ports or until the hub is re-enumerated.
The I/O pins of the AT43301 should not be directly connected to voltages less than VSS or more
than the voltage at the CEXT pins. If it is necessary to violate this rule, insert a series resistor
between the I/O pin and the source of the external signal source that limits the current into the
I/O pin to less than 0.2 mA. Under no circumstance should the external voltage exceed 5.5V. To
do so will put the chip under excessive stress.
Figure 2-3.
External Oscillator and PLL Circuit
2.9
Power Supply
The AT43301 is powered from the USB bus, but has an internal voltage regulator to supply the
3.3V operating power to its circuitry. For proper operation, an external high quality, low ESR,
0.27 μF, or larger, capacitor should be connected to the output of the regulator, CEXT1 and
ground. The CEXT1 pin can also be used to supply the voltage to the 1.5 k
pull up resistor at
Port 0’s DP pin.
To provide the best operating condition for the AT43301, careful consideration of the power sup-
ply connections are recommended. Use short, low impedance connections to all power supply
lines: V
CC
and V
SS
. Use sufficient decoupling capacitance to reduce noise: 0.1 μF of high quality
ceramic capacitor soldered as close as possible to the VCC and VSS package pins are
recommended.
The AT43301 can also operate directly off a 3.3V power supply. In this case, leave the VCC pin
floating and connect the 3.3V power to CEXT1.
AT43301
OSC1
OSC2
LFT
Y1
6.000 MHz
R1
100
C1
10nF
C2
2nF
U1
相關PDF資料 |
PDF描述 |
|---|---|
| AT43301 | USB HUB CONTROLLER |
| AT43310 | USB Hub |
| AT43311 | USB Hub |
| AT43312A-AC | Self- and Bus-Bus-powered USB Hub Controller |
| AT43312A-AU | Self- and Bus-Bus-powered USB Hub Controller |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| AT43301-AU | 功能描述:USB 接口集成電路 USB FOUR PORT HUB GANGED RoHS:否 制造商:Cypress Semiconductor 產(chǎn)品:USB 2.0 數(shù)據(jù)速率: 接口類型:SPI 工作電源電壓:3.15 V to 3.45 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:WLCSP-20 |
| AT43301-SC | 功能描述:USB 接口集成電路 COM TEMP RoHS:否 制造商:Cypress Semiconductor 產(chǎn)品:USB 2.0 數(shù)據(jù)速率: 接口類型:SPI 工作電源電壓:3.15 V to 3.45 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:WLCSP-20 |
| AT43301-SU | 功能描述:USB 接口集成電路 USB FOUR PORT HUB GANGED RoHS:否 制造商:Cypress Semiconductor 產(chǎn)品:USB 2.0 數(shù)據(jù)速率: 接口類型:SPI 工作電源電壓:3.15 V to 3.45 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:WLCSP-20 |
| AT43310 | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:USB Hub |
| AT433104AA | 制造商:LINPAC STORAGE SYSTEMS 功能描述:BLUE CONTAINER 25L |
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