參數(shù)資料
型號(hào)： FT232BM
廠(chǎng)商： Electronic Theatre Controls, Inc.
英文描述： Generation of FTDI’s Popular USB UART I.C.
中文描述： 在FTDI的流行的USB UART的新一代集成電路
文件頁(yè)數(shù)： 16/24頁(yè)
文件大?。?/td> 812K
代理商： FT232BM
DS232B Version 1.1 Future Technology Devices Intl. Ltd. 2002
Page 16 of 24
FT232BM USB UART ( USB - Serial) I.C.
Figure 8
USB Self Powered Configuration (1)
VCC
27R
USB "B"
Connector
27R
USB DM
RSTOUT#
8
FT232BM
USB DP
7
5
V
C
C
V
C
C
V
C
C
I
O
3
26
13
1
2
3
4
1k5
33nF
3v3OUT
6
470R
A
V
C
C
30
0.1uF
POWERCTL
14
G
N
D
G
N
D
A
G
N
D
9
17
29
VCC
RESET#
4
100k
10k
2N3904
Decoupling Capacitors
10uF
VCC
0.1uF
0.1uF
+
Figure 8 illustrates a typical USB self powered configuration. A USB Self Powered device gets its power from its own
POWER SUPPLY and does not draw current from the USB bus. Basic rules for USB Self power devices are as follows
–
a) A Self-Powered device should not force current down the USB bus when the USB Host or Hub Controller is
powered down.
b) A Self Powered Device can take as much current as it likes during normal operation and USB suspend as it has its
own POWER SUPPLY.
c) A Self Powered Device can be used with any USB Host and both Bus and Self Powered USB Hubs
POWERCTL ( pin 14 ) is pulled high to tell the device to use a USB Bus Power descriptor. The power descriptor in the
EEPROM should be programmed to a value of zero.
To meet requirement a), the 1k5 pull-up circuit on USB DP has to be modified to prevent the device forcing current into
the USB DP line via the 1k5 pull-up when the host or hub is powered down. Failure to do this may cause some USB
host or hub controllers to power up erratically. A NPN small signal transistor ( 2N3906 ) is used to sense the power on
the USB bus. It is connected as an emitter-follower circuit so that when there is power on the USB bus the transistor
will saturate and pull the 1k5 resistor to the voltage of RSTOUT#. When the USB power is off, the transistor will turn
off thus preventing current flow into the USB DP line.
相關(guān)PDF資料
PDF描述
FT232R Incorporating Clock Generator Output and FTDIChip-ID Security Dongle
FT232RL Incorporating Clock Generator Output and FTDIChip-ID Security Dongle
FT232RQ Incorporating Clock Generator Output and FTDIChip-ID Security Dongle
FT500AH-80 Phase Control SCR 320 Amperes Avg 3000-4000 Volts
FT500AN-60 PHASE CONTROL SCR
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
FT232BQ 制造商:FTDI 制造商全稱(chēng):FTDI 功能描述:USB UART ( USB - Serial) I.C.
FT232BQ-REEL 功能描述:USB 接口集成電路 USB to Serial UART IC QFN-32 RoHS:否 制造商:Cypress Semiconductor 產(chǎn)品:USB 2.0 數(shù)據(jù)速率: 接口類(lèi)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(fēng)格:SMD/SMT 封裝 / 箱體:WLCSP-20
FT232HL 制造商:FTDI 制造商全稱(chēng):FTDI 功能描述:FT232H Single Channel Hi-Speed USB to Multipurpose UART/FIFO IC
FT232HL-REEL 功能描述:USB 接口集成電路 USB HS to UART/FIFO SPI/JTAG/I2C LQFP-48 RoHS:否 制造商:Cypress Semiconductor 產(chǎn)品:USB 2.0 數(shù)據(jù)速率: 接口類(lèi)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(fēng)格:SMD/SMT 封裝 / 箱體:WLCSP-20
FT232HL-TRAY 功能描述:USB 接口集成電路 USB HS to UART/FIFO SPI/JTAG/I2C LQFP-48 RoHS:否 制造商:Cypress Semiconductor 產(chǎn)品:USB 2.0 數(shù)據(jù)速率: 接口類(lèi)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(fēng)格:SMD/SMT 封裝 / 箱體:WLCSP-20
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠(chǎng)商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*