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参数资料
| 型号： | FT245BL |
| 厂商： | Future Technology Devices International Ltd |
| 元件分类： | 微控制器/微处理器 |
| 中文描述： | SPECIALTY MICROPROCESSOR CIRCUIT, PQFP32 |
| 封装： | 7 X 7 MM, 0.80 MM PITCH, LEAD FREE, LQFP-32 |
| 文件页数： | 13/24页 |
| 文件大小： | 995K |
| 代理商： | FT245BL |
DS245B Version 1.7
Future Technology Devices Intl. Ltd. 2005
Page 20 of 24
FT245BM USB FIFO ( USB - Parallel ) I.C.
Figure 10
Self Powered Circuit with 3.3 V logic drive / supply voltage
Figure 10 is an example of a USB self powered design with 3.3V interface. In this case VCCIO is supplied by an
external 3.3V supply in order to make the device IO pins drive out at 3.3V logic level, thus allowing it to be connected
to a 3.3V MCU or other external logic. A USB self powered design uses its own power supplies, and does not draw
any of its power from the USB bus. In such cases, no special care need be taken to meet the USB suspend current
(0.5 mA) as the device does not get its power from the USB port.
As with bus powered 3.3V interface designs, 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 FT245BM to supply the 3.3V without any other components being
required. In this case, connect VCCIO to the 3v3OUT pin of the FT245BM.
Note that if SI/WU is not being used it should be pulled up to VCCIO.
VCC5V
27R
USB "B"
Connector
27R
USB DM
RSTOUT#
8
FT245BM
USB DP
7
5
V
C
I
O
13
1
2
3
4
1K5
33nF
3v3OUT
6
0.1uF
G
N
D
G
N
D
A
G
N
D
9
17
29
RESET#
4
10K
4K7
Decoupling Capacitors
10uF
VCC5V
0.1uF
+
VCC3V
SI/WU
V
C
V
C
3
26
470R
A
V
C
30
11
OBSOLETE
相关PDF资料 |
PDF描述 |
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| FT245BQ | |
| FT245BM | |
| FTL-1419-3D | FIBER OPTIC TRANSCEIVER, 1290-1340nm, 1250Mbps(Tx), 1250Mbps(Rx), PANEL MOUNT |
| FTLF1321P1BTL | FIBER OPTIC TRANSCEIVER, 1270-1360nm, 2667Mbps(Tx), 2667Mbps(Rx), SURFACE MOUNT, LC CONNECTOR |
| FTLF1321P1WTL | FIBER OPTIC TRANSCEIVER, 1270-1360nm, 2667Mbps(Tx), 2667Mbps(Rx), SURFACE MOUNT, LC CONNECTOR |
相关代理商/技术参数 |
参数描述 |
|---|---|
| FT245BL/TR | 制造商:Future Technology Devices International (FTDI Chip) 功能描述:IC USB FIFO SMD LQFP32 245 制造商:Future Technology Devices International (FTDI Chip) 功能描述:IC, USB FIFO, SMD, LQFP32, 245 制造商:Future Technology Devices International (FTDI Chip) 功能描述:IC, USB FIFO INTERFACE, 480MBPS, LQFP-32; USB Type:FIFO; USB Version:1.1, 2.0; Supply Voltage Min:4.35V; Supply Voltage Max:5.25V; Digital IC Case Style:LQFP; No. of Pins:32; Data Rate:480Mbps; No. of Ports:2; MSL:MSL 3 - 168 hours ;RoHS Compliant: Yes |
| FT245BL-REEL | 功能描述:USB 接口集成电路 USB to Parallel FIFO IC LQFP-32 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 |
| FT245BL-TRAY | 制造商:Future Technology Devices International (FTDI Chip) 功能描述:USB FIFO ( USB - PARALLEL ) I.C. |
| FT245BM | 功能描述:先进先出 Obsolete See FT245RL RoHS:否 制造商:IDT 电路数量: 数据总线宽度:18 bit 总线定向:Unidirectional 存储容量:4 Mbit 定时类型:Synchronous 组织:256 K x 18 最大时钟频率:100 MHz 访问时间:10 ns 电源电压-最大:3.6 V 电源电压-最小:6 V 最大工作电流:35 mA 最大工作温度:+ 85 C 封装 / 箱体:TQFP-80 封装: |
| FT245BM-TRAY | 功能描述:USB 接口集成电路 Obsolete See FT245RL 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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