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參數(shù)資料
| 型號： | FT2232C |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | FT2232C Dual USB UART / FIFO I.C. |
| 中文描述： | FT2232C雙USB的UART / FIFO的集成電路 |
| 文件頁數(shù)： | 26/51頁 |
| 文件大小： | 907K |
| 代理商： | FT2232C |
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DS2232C Version 1.4
Future Technology Devices International Ltd. 2005 Page 26 of 54
FT2232C Dual USB UART / FIFO I.C.
8.5 Power Switching
Figure 12 - Bus Powered Circuit with Power Control
USB Bus powered circuits need to be able to power down in USB suspend mode in order to meet the <= 500μA total
suspend current requirement (including external logic). Some external logic can power itself down into a low current
state by monitoring the PWREN# pin. For external logic that cannot power itself down in that way, the FT2232C
provides a simple but effective way of turning off power to external circuitry during USB suspend.
Figure 12 shows how to use a discrete P-Channel Logic Level MOSFET to control the power to external logic circuits.
www.irf.com) IRLML6402, or equivalent. It is recommended that
a “soft start” circuit consisting of a 1K series resistor and a 0.1 μF capacitor are used to limit the current surge when
the MOSFET turns on. Without the soft start circuit there is a danger that the transient power surge of the MOSFET
turning on will reset the FT2232C, or the USB host / hub controller. The values used here allow attached circuitry to
power up with a slew rate of ~12.5 V per millisecond, in other words the output voltage will transition from GND to 5V
in approximately 400 microseconds.
USB "B"
Connector
Ferrite Bead
470R
0.1uF
VCC
27R
27R
USB DM
8
FT2232C
USB DP
7
V
C
C
V
C
C
V
C
C
I
O
B
3
42
31
1
2
3
4
33nF
3V3OUT
6
A
C
C
46
10nF
PWREN#
41
0.1uF
Switched 5V Power to
External Logic
P-Channel Power
MOSFET
s
g
d
0.1uF
Soft Start
Circuit
1K
V
C
C
I
O
A
14
RSTOUT#
1.5K
RESET#
VCC
Decoupling Capacitors
10uF
VCC
0.1uF
0.1uF
+
4
5
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| FT245BL | FT245BL USB FIFO ( USB - Parallel ) I.C. |
| FT245BM | FT245BM USB FIFO ( USB - Parallel ) I.C. |
| FT245BQ | FT245BQ USB FIFO ( USB - Parallel ) I.C. |
| FT6116 | 2K X 8 CMOS SRAM |
| FT8U100AX | FT8U100AX USB Compound Hub Controller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| FT2232C_04 | 制造商:FTDI 制造商全稱:FTDI 功能描述:Dual USB UART / FIFO I.C. |
| FT2232D | 制造商:Future Technology Devices International 功能描述:UART 2-CH 3.3V/5V 48-Pin LQFP 制造商:Future Technology Devices International 功能描述:UART 2-CH 3.3V/5V 48-Pin LQFP Bulk 制造商:Future Technology Devices International (FTDI Chip) 功能描述:USB Full Speed to Dual Channel Serial UART/FIFO/JTAG/SPI/I2C IC - LQFP-48 |
| FT2232D/TR | 制造商:Future Technology Devices International (FTDI Chip) 功能描述:USB-UART/FIFO SMD 2232 LQFP48 制造商:Future Technology Devices International (FTDI Chip) 功能描述:USB-UART/FIFO, SMD, 2232, LQFP48 制造商:Future Technology Devices International (FTDI Chip) 功能描述:USB-UART/FIFO, SMD, 2232, LQFP48; USB Type:FIFO; USB Version:2.0; Supply Voltage Min:3V; Supply Voltage Max:5.25V; Digital IC Case Style:LQFP; No. of Pins:48; Data Rate:12Mbps; No. of Ports:2; Operating Temperature Min:-40C ;RoHS Compliant: Yes |
| FT2232D-REEL | 功能描述:USB 接口集成電路 USB to Dual UART/ FIFO/SPI/JTAG/I2C 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 |
| FT2232D-TRAY | 制造商:Future Technology Devices International (FTDI Chip) 功能描述:DUAL USB TO SERIAL UART/FIFO IC |
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