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參數(shù)資料
| 型號(hào)： | FT245BL-REEL |
| 廠商： | FTDI, Future Technology Devices International Ltd |
| 文件頁(yè)數(shù)： | 20/24頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC USB FS PARALLEL FIFO 32-LQFP |
| 標(biāo)準(zhǔn)包裝： | 1,000 |
| 系列： | * |
| 類(lèi)型： | * |
| 應(yīng)用： | * |
| 安裝類(lèi)型： | 表面貼裝 |
| 封裝/外殼： | 32-LQFP |
| 供應(yīng)商設(shè)備封裝： | 32-LQFP（7x7） |
| 包裝： | 帶卷 (TR) |
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DS245BL Version 1.7
Future Technology Devices Intl. Ltd. 2005
Page 5 of 24
FT245BL USB FIFO ( USB - Parallel ) I.C.
3.0 Block Diagram ( simplied )
x8 Clock
Multiplier
Serial Interface
Engine
( SIE )
USB
Protocol Engine
FIFO Transmit
Buffer
384 Bytes
FIFO Receive
Buffer
128 Bytes
3.3 Volt
LDO
Regulator
USB
Transceiver
USB DPLL
6MHZ
Oscillator
48MHz
12MHz
XTIN
XTOUT
USBDP
USBDM
3V3OUT
VCC
RESET#
TEST
GND
FIFO
Controller
D0
D1
D2
D3
D4
D5
D6
D7
EEPROM
Interface
RD#
WR
EECS
EESK
EEDATA
RXF#
TXE#
PWREN#
RESET
GENERATOR
RSTOUT#
3V3OUT
Send Immediate / WakeUP
3.1 Functional Block Descriptions
3.3V LDO Regulator
The 3.3V LDO Regulator generates the 3.3 volt
reference voltage for driving the USB transceiver
cell output buffers. It requires an external
decoupling capacitor to be attached to the 3V3OUT
regulator output pin. It also provides 3.3V power to
the RSTOUT# pin. The main function of this block
is to power the USB Transceiver and the Reset
Generator Cells rather than to power external logic.
However, external circuitry requiring 3.3V nominal
at a current of not greater than 5mA could also
draw its power from the 3V3OUT pin if required.
USB Transceiver
The USB Transceiver Cell provides the USB 1.1 /
USB 2.0 full-speed physical interface to the USB
cable. The output drivers provide 3.3 volt level slew
rate control signalling, whilst a differential receiver
and two single ended receivers provide USB data
in, SEO and USB Reset condition detection.
USB DPLL
The USB DPLL cell locks on to the incoming NRZI
USB data and provides separate recovered clock
and data signals to the SIE block.
6MHz Oscillator
The 6MHz Oscillator cell generates a 6MHz
reference clock input to the x8 Clock multiplier from
an external 6MHz crystal or ceramic resonator.
x8 Clock Multiplier
The x8 Clock Multiplier takes the 6MHz input
from the Oscillator cell and generates a 12MHz
reference clock for the SIE, USB Protocol Engine
and FIFO controller blocks. It also generates a
48MHz reference clock for the USB DPLL.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)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(jìn)先出 Obsolete See FT245RL RoHS:否 制造商:IDT 電路數(shù)量: 數(shù)據(jù)總線(xiàn)寬度:18 bit 總線(xiàn)定向:Unidirectional 存儲(chǔ)容量:4 Mbit 定時(shí)類(lèi)型:Synchronous 組織:256 K x 18 最大時(shí)鐘頻率:100 MHz 訪(fǎng)問(wèn)時(shí)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(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 |
| FT245BQ | 制造商:未知廠家 制造商全稱(chēng):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(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 |
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