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參數(shù)資料
| 型號(hào)： | 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)： | 23/51頁 |
| 文件大?。?/td> | 907K |
| 代理商： | FT2232C |
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DS2232C Version 1.4
Future Technology Devices International Ltd. 2005 Page 23 of 54
FT2232C Dual USB UART / FIFO I.C.
8.4 Interfacing to 3.3V Logic
Figure 10 - Bus Powered Circuit with 3.3V logic drive and IO supply voltage
Figure 10 shows how to configure the FT2232C to interface with a 3.3V logic devices. In this example, a discrete 3.3V
regulator is used to supply the 3.3V logic from the USB supply. VCCIOA and VCCIOB are connected to the output of
the 3.3V regulator, which in turn will cause the device interface IO pins on both channels to drive out at 3.3V level. It is
also possible to have one IO interface channel driving out at 5V level, and the other at 3.3V level. In this case one of
the VCCIO pins would be connected to 5V, and the other connected to 3.3V.
For USB bus powered circuits some considerations have to be taken into account when selecting the regulator –
a) The regulator must be capable of sustaining its output voltage with an input voltage of 4.35 volts. A Low Drop Out
(LDO) regulator must be selected.
b) The quiescent current of the regulator must be low in order to meet the USB suspend total current requirement of
<= 500μA during USB suspend.
An example of a regulator family that meets these requirements is the MicroChip (Telcom) TC55 Series. These
devices can supply up to 250mA current and have a quiescent current of under 1μA.
Ferrite Bead
470R
0.1uF
VCC
27R
USB "B"
Connector
27R
USB DM
8
FT2232C
USB DP
7
V
C
C
V
C
C
V
C
C
I
O
A
3
42
14
1
2
3
4
33nF
3v3OUT
6
A
V
C
C
46
10nF
0.1uF
In
Out
Gnd
3.3V LDO
Regulator
3.3V Power to
External Logic
V
C
C
I
O
B
31
RSTOUT#
1.5K
Decoupling
Capacitors
10uF
VCC
0.1uF
0.1uF
+
5
VCC
RESET#
TEST
4
47
G
N
D
G
N
D
A
G
N
D
18
25
34
G
N
D
G
N
D
9
45
VCC3V3
VCC3V3
VCC3V3
SI/WUA
SI/WUB
10
26
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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(fēng)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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