FT245BQ USB FIFO ( USB - Parallel ) I.C.
FIFO Data / Control Bus IO Pin Characteristics ( VCCIO = 3V to 3.6V )
Parameter Description
Min
2.2
0.3
1.0
20
Typ
2.7
0.4
1.2
25
Max
3.2
0.5
1.5
30
Units
V
Conditions
I source = 2mA
I sink = 4 mA
*** Note 7
Voh
Vol
Output Voltage High
Output Voltage Low
V
Vin
Input Switching Threshold
Input Switching Hysteresis
V
VHys
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
4.0
0.1
1.8
Typ
Max
5.0
1.0
3.2
Units
Conditions
Fosc = 6MHz
Fosc = 6MHz
Voh
Vol
Vin
Output Voltage High
-
-
V
V
V
Output Voltage Low
Input Switching Threshold
2.5
RESET#, TEST, EECS, EESK, EEDATA, IO Pin Characteristics
Parameter Description
Min
3.2
0.3
1.3
50
Typ
4.1
0.4
1.6
55
Max
4.9
0.6
1.9
60
Units
V
Conditions
I source = 2mA
I sink = 2 mA
*** Note 8
Voh
Vol
Output Voltage High
Output Voltage Low
V
Vin
Input Switching Threshold
Input Switching Hysteresis
V
VHys
mV
***Note 8 – EECS, EESK and EEDATA pins have an internal 200K pull-up resistor to VCC
RSTOUT Pin Characteristics
Parameter Description
Min
3.0
0.3
Typ
Max
3.6
Units
Conditions
Voh
Vol
Output Voltage High
Output Voltage Low
-
-
V
V
I source = 2mA
I sink = 2 mA
0.6
USB IO Pin Characteristics
Parameter Description
Min
Typ
Max
Units Conditions
UVoh
UVol
IO Pins Static Output ( High)
2.8
3.6
V
V
RI = 1.5K to 3V3Out ( D+ )
RI = 15K to GND ( D- )
IO Pins Static Output ( Low )
0
0.3
RI = 1.5K to 3V3Out ( D+ )
RI = 15K to GND ( D- )
UVse
Single Ended Rx Threshold
Differential Common Mode
Differential Input Sensitivity
Driver Output Impedance
0.8
0.8
0.2
29
2.0
2.5
V
V
V
UCom
UVDif
UDrvZ
44
Ohm *** Note 9
Note 9 – Driver Output Impedance includes the external 27R series resistors on USBDP and USBDM pins.
DS245BQ Version 1.7
© Future Technology Devices Intl. Ltd. 2005
Page 14 of 24
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