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參數資料
| 型號： | FT245BL-REEL |
| 廠商： | FTDI, Future Technology Devices International Ltd |
| 文件頁數： | 13/24頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC USB FS PARALLEL FIFO 32-LQFP |
| 標準包裝： | 1,000 |
| 系列： | * |
| 類型： | * |
| 應用： | * |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 32-LQFP |
| 供應商設備封裝： | 32-LQFP（7x7） |
| 包裝： | 帶卷 (TR) |
DS245BL Version 1.7
Future Technology Devices Intl. Ltd. 2005
Page 20 of 24
FT245BL 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 FT245BL to supply the 3.3V without any other components being
required. In this case, connect VCCIO to the 3v3OUT pin of the FT245BL.
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
FT245BL
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相關代理商/技術參數 |
參數描述 |
|---|---|
| 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:先進先出 Obsolete See FT245RL RoHS:否 制造商:IDT 電路數量: 數據總線寬度:18 bit 總線定向:Unidirectional 存儲容量:4 Mbit 定時類型:Synchronous 組織:256 K x 18 最大時鐘頻率:100 MHz 訪問時間:10 ns 電源電壓-最大:3.6 V 電源電壓-最小:6 V 最大工作電流:35 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-80 封裝: |
| FT245BM-TRAY | 功能描述:USB 接口集成電路 Obsolete See FT245RL RoHS:否 制造商:Cypress Semiconductor 產品:USB 2.0 數據速率: 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 安裝風格:SMD/SMT 封裝 / 箱體:WLCSP-20 |
| FT245BQ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:FT245BQ USB FIFO ( USB - Parallel ) I.C. |
| FT245BQ-REEL | 功能描述:USB 接口集成電路 USB to Parallel FIFO IC QFN-32 RoHS:否 制造商:Cypress Semiconductor 產品:USB 2.0 數據速率: 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 安裝風格:SMD/SMT 封裝 / 箱體:WLCSP-20 |
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