参数资料
型号: FT232BQ-REEL
厂商: FTDI, Future Technology Devices International Ltd
文件页数: 18/34页
文件大小: 0K
描述: IC NEW DESIGNS REFER TO FT232RQ
标准包装: 1
系列: USBmadeEZ-UART
通道数: 1,UART
FIFO's: 256 字节
规程: RS232,RS422,RS485
电源电压: 4.35 V ~ 5.25 V
带自动流量控制功能:
带调制解调器控制功能:
带CMOS:
安装类型: 表面贴装
封装/外壳: 32-WFQFN 裸露焊盘
供应商设备封装: 32-QFN 裸露焊盘(5x5)
包装: 标准包装
其它名称: 768-1067-6
Copyright 2011 Future Technology Devices International Limited
25
Document No.: FT_000329
FT232BL
/BQ USB UART IC Datasheet Version 2.2
Clearance No.: FTDI#
171
8.2 USB RS422 Converter Configuration
Figure 8.2 USB-RS422 Converter Configuration
Figure 8.2 illustrates how to connect the UART interface of the FT232B to a TTL – RS422 Level Converter
I.C. to make a USB RS422 converter. There are many such level converter devices available – this
example uses Exar/Sipex SP491 devices which have enables on both the transmitter and receiver.
Because the transmitter enable is active high, it is connected to the SLEEP# pin. The receiver enable is
active low and is connected to the PWREN# pin. This ensures that both the transmitters and receivers are
enabled when the device is active, and disabled when the device is in USB suspend mode. If the design is
USB BUS powered, it may be necessary to use a P-Channel logic level MOSFET (controlled by PWREN#) in
the VCC line of the SP491 devices to ensure that the USB standby current of 500uA is met.
The SP491 is good for sending and receiving data at a rate of up to 5M Baud – in this case the maximum
rate is limited to 3M Baud by the FT232B
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FT232HL 制造商:FTDI 制造商全称:FTDI 功能描述:FT232H Single Channel Hi-Speed USB to Multipurpose UART/FIFO IC
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FT232HQ-REEL 功能描述:USB 接口集成电路 USB HS to UART/FIFO SPI/JTAG/I2C QFN-48 RoHS:否 制造商:Cypress Semiconductor 产品:USB 2.0 数据速率: 接口类型:SPI 工作电源电压:3.15 V to 3.45 V 工作电源电流: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:WLCSP-20
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