参数资料
型号: FT232RQ-REEL
厂商: FTDI, Future Technology Devices International Ltd
文件页数: 22/43页
文件大小: 0K
描述: IC USB FS SERIAL UART 32-QFN
产品培训模块: USB Introduction
USB-UART Interface Solutions
标准包装: 1
系列: USBmadeEZ-UART
特点: USB 至 UART
通道数: 1,UART
FIFO's: 256 字节
规程: RS232,RS422,RS485
电源电压: 3.3 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-VFQFN 裸露焊盘
供应商设备封装: 32-QFN 裸露焊盘(5x5)
包装: 标准包装
产品目录页面: 634 (CN2011-ZH PDF)
配用: 768-1023-ND - MOD USB RS232 DEV/EVAL FT232RL
768-1022-ND - MOD USB UART MINI B DEV FT232R
768-1021-ND - MOD USB UART MINI DEV FT232R
768-1019-ND - MOD USB UART DEV FT232R
其它名称: 768-1008-6
Copyright 2010 Future Technology Devices International Limited
29
Document No.: FT_000053
FT232R USB UART IC Datasheet Version 2.10
Clearance No.: FTDI# 38
7.3 USB to RS422 Converter
FT232R
GND
100nF
VCC
USBDM
USBDP
VCCIO
NC
RESET#
NC
OSCI
OSCO
3V3OUT
A
G
N
D
G
N
D
G
N
D
G
N
D
T
E
S
T
TXD
RXD
RTS#
CTS#
DTR#
DSR#
DCD#
RI#
CBUS0
CBUS1
CBUS2
CBUS3
CBUS4-
1
2
3
4
GND
SHIELD
GND
100nF
4.7uF
+
5
10nF +
Ferrite Bead
Vcc
PWREN#
RS422 LEVEL
CONVERTER
Vcc
SP491
5
3
4
7
6
TXDM
TXDP
RXDP
RXDM
120R
10
9
11
12
SLEEP#
RS422 LEVEL
CONVERTER
SP491
3
4
7
6
Vcc
10K
2
5
120R
11
12
9
10
RTSM
RTSP
CTSP
CTSM
GND
DB9M
SHIELD
TXDM
TXDP
RXDP
RXDM
RTSM
RTSP
CTSP
CTSM
2
Figure 7.3 USB to RS422 Converter Configuration
An example of using the FT232R as a USB to RS422 converter is shown in Figure 7.3. In this application,
two TTL to RS422 Level Converter ICs are used on the serial UART interface of the FT232R to convert the
TTL levels of the FT232R to RS422 levels. There are many suitable level converter devices available. This
example uses Sipex SP491 devices which have enables on both the transmitter and receiver. Since the
SP491 transmitter enable is active high, it is connected to a CBUS pin in SLEEP# configuration. The
SP491 receiver enable is active low and is therefore connected to a CBUS pin PWREN# configuration. This
ensures that when both the SP491 transmitters and receivers are enabled then the device is active, and
when the device is in USB suspend mode, the SP491 transmitters and receivers are disabled. If a similar
application is used, but 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 2.5mA is met.
The SP491 is specified to transmit and receive data at a rate of up to 5 Mbaud. In this example the
maximum data rate is limited to 3 Mbaud by the FT232R.
相关PDF资料
PDF描述
SC16C550BIA44,512 IC UART SINGLE W/FIFO 44-PLCC
SC16C550BIA44,518 IC UART SINGLE W/FIFO 44-PLCC
SC16IS750IPW,128 IC UART I2C/SPI 24-TSSOP
SC16IS740IPW/Q900, IC UART SINGLE W/FIFO 16-TSSOP
XR16L788CQ-F IC UART 64B 3.3V OCTAL 100QFP
相关代理商/技术参数
参数描述
FT232RQ-TRAY 制造商:Future Technology Devices International (FTDI Chip) 功能描述:
FT-23-43 制造商:Amidon 功能描述:Bulk
FT234XD-R 制造商:Future Technology Devices International (FTDI Chip) 功能描述:IC USB SERIAL BASIC UART 12DFN 制造商:Future Technology Devices International (FTDI Chip) 功能描述:USB to Serial UART Interface
FT234XD-T 功能描述:USB 接口集成电路 USB to Basic Serial UART IC 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
FT-23-77 制造商:Amidon 功能描述: