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参数资料
| 型号： | FT2232D-REEL |
| 厂商： | FTDI, Future Technology Devices International Ltd |
| 文件页数： | 16/61页 |
| 文件大小： | 0K |
| 描述： | IC USB FS DUAL UART/FIFO 48-LQFP |
| 产品培训模块： | USB Introduction |
| 标准包装： | 1 |
| 系列： | USBmadeEZ-FIFO，FT-X，X-Chip |
| 特点： | USB 至 UART 和（或）FIFO、SPI、I2C、JTAG |
| 通道数： | 2，DUART |
| FIFO's： | 384 字节 |
| 规程： | RS232，RS422，RS485 |
| 电源电压： | 4.35 V ~ 5.25 V |
| 带并行端口： | 是 |
| 带自动流量控制功能： | 是 |
| 带调制解调器控制功能： | 是 |
| 带CMOS： | 是 |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 48-LQFP |
| 供应商设备封装： | 48-LQFP |
| 包装： | 标准包装 |
| 产品目录页面： | 634 (CN2011-ZH PDF) |
| 配用： | 768-1030-ND - MOD USB HS FT2232H EVAL 813-1009-ND - MODULE USB-TO-FPGA TOOL W/MANUAL 813-1001-ND - MODULE USB ADAPTR FOR FT2232D LP 813-1000-ND - MODULE USB ADAPTER FOR FT2232D |
| 其它名称： | 768-1010-6 |
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Copyright 2010 Future Technology Devices International Limited
23
Document No.: FT_000173
FT2232D DUAL USB TO SERIAL UART
/FIFO IC Datasheet
Version 2.05
Clearance No.: FTDI# 127
6.2 Interfacing to 3.3V Logic
Figure 6.3 Bus Powered Circuit with 3.3V logic drive and IO supply voltage
Figure 6.3 shows how to configure the FT2232D to interface with 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.
In some cases, where only a small amount of current is required (< 5mA) , it may be possible to
use the in-built regulator of the FT2232D to supply the 3.3V without any other components being
required. In this case, connect VCCIOA or VCCIOB to the 3V3OUT pin of the FT2232D.
Note: It should be emphasised that the 3.3V supply for VCCIO in a bus powered design with a 3.3V
logic interface should come from an LDO which is supplied by the USB bus, or from the 3V3OUT pin
of the FT232BM, and not from any other source. Please also note that if the SI/WU pins are not
being used they should be pulled up to the same supply as their respective VCCIO pin.
相关PDF资料 |
PDF描述 |
|---|---|
| FT2232HQ-REEL | IC USB HS DUAL UART/FIFO 64-QFN |
| FT232BL-REEL | IC USB FS SERIAL UART 32-LQFP |
| FT232HL-REEL | IC HS USB TO UART/FIFO 48LQFP |
| FT232RL-REEL | IC USB FS SERIAL UART 28-SSOP |
| FT245BL-REEL | IC USB FS PARALLEL FIFO 32-LQFP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| FT2232D-TRAY | 制造商:Future Technology Devices International (FTDI Chip) 功能描述:DUAL USB TO SERIAL UART/FIFO IC |
| FT2232H | 制造商:FTDI 制造商全称:FTDI 功能描述:DUAL HIGH SPEED USB TO MULTIPURPOSE UART |
| FT2232H MINI MODULE | 功能描述:界面开发工具 USB Hi-Speed FT2232H Evaluation Module RoHS:否 制造商:Bourns 产品:Evaluation Boards 类型:RS-485 工具用于评估:ADM3485E 接口类型:RS-485 工作电源电压:3.3 V |
| FT2232H_10 | 制造商:FTDI 制造商全称:FTDI 功能描述:DUAL HIGH SPEED USB TO MULTIPURPOSE UART/FIFO IC |
| FT2232H_12 | 制造商:FTDI 制造商全称:FTDI 功能描述:Dual High Speed USB to Multipurpose UART/FIFO IC |
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