參數(shù)資料
型號： FT245BQ
廠商： Future Technology Devices International Ltd
元件分類： 微控制器/微處理器
中文描述： SPECIALTY MICROPROCESSOR CIRCUIT, QCC32
封裝： 5 X 5 MM, LEAD FREE, QFN-32
文件頁數(shù)： 6/24頁
文件大?。?/td> 995K
代理商： FT245BQ
DS245B Version 1.7
Future Technology Devices Intl. Ltd. 2005
Page 14 of 24
FT245BM USB FIFO ( USB - Parallel ) I.C.
FIFO Data / Control Bus IO Pin Characteristics ( VCCIO = 3V to 3.6V )
Parameter Description
Min
Typ
Max
Units
Conditions
Voh
Output Voltage High
2.2
2.7
3.2
V
I source = 2mA
Vol
Output Voltage Low
0.3
0.4
0.5
V
I sink = 4 mA
Vin
Input Switching Threshold
1.0
1.2
1.5
V
***
Note 7
VHys
Input Switching Hysteresis
20
25
30
mV
***Note 7 – Inputs or IO Pins in Input Mode have an internal 200K pull-up resistor to VCCIO.
XTIN / XTOUT Pin Characteristics
Parameter Description
Min
Typ
Max
Units
Conditions
Voh
Output Voltage High
4.0
-
5.0
V
Fosc = 6MHz
Vol
Output Voltage Low
0.1
-
1.0
V
Fosc = 6MHz
Vin
Input Switching Threshold
1.8
2.5
3.2
V
RESET#, TEST, EECS, EESK, EEDATA, IO Pin Characteristics
Parameter Description
Min
Typ
Max
Units
Conditions
Voh
Output Voltage High
3.2
4.1
4.9
V
I source = 2mA
Vol
Output Voltage Low
0.3
0.4
0.6
V
I sink = 2 mA
Vin
Input Switching Threshold
1.3
1.6
1.9
V
***
Note 8
VHys
Input Switching Hysteresis
50
55
60
mV
***Note 8 – EECS, EESK and EEDATA pins have an internal 200K pull-up resistor to VCC
RSTOUT Pin Characteristics
Parameter Description
Min
Typ
Max
Units
Conditions
Voh
Output Voltage High
3.0
-
3.6
V
I source = 2mA
Vol
Output Voltage Low
0.3
-
0.6
V
I sink = 2 mA
USB IO Pin Characteristics
Parameter Description
Min
Typ
Max
Units Conditions
UVoh
IO Pins Static Output ( High)
2.8
3.6
V
RI = 1.5K to 3V3Out ( D+ )
RI = 15K to GND ( D- )
UVol
IO Pins Static Output ( Low )
0
0.3
V
RI = 1.5K to 3V3Out ( D+ )
RI = 15K to GND ( D- )
UVse
Single Ended Rx Threshold
0.8
2.0
V
UCom
Differential Common Mode
0.8
2.5
V
UVDif
Differential Input Sensitivity
0.2
V
UDrvZ
Driver Output Impedance
29
44
Ohm
***
Note 9
Note 9 – Driver Output Impedance includes the external 27R series resistors on USBDP and USBDM pins.
OBSOLETE
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