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Page 11
Table 10 - FT232R UART and CBUS I/O Pin Characteristics (VCCIO = 2.8V, Standard Drive Level)
Parameter
Voh
Vol
Vin
VHys
Description
Output Voltage High
Output Voltage Low
Input Switching Threshold
Input Switching Hysteresis
Min
2.1
0.3
1.0
20
Typ
2.6
0.4
1.2
25
Max
3.1
0.5
1.5
30
Units
V
V
V
mV
Conditions
I source = 1mA
I sink = 2mA
**
**
Table 11 - FT232R UART and CBUS I/O Pin Characteristics (VCCIO = 5.0V, High Drive Level)
Parameter
Voh
Vol
Vin
VHys
Description
Output Voltage High
Output Voltage Low
Input Switching Threshold
Input Switching Hysteresis
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
V
V
mV
Conditions
I source = 6mA
I sink = 6mA
**
**
Table 12 - FT232R UART and CBUS I/O Pin Characteristics (VCCIO = 3.3V, High Drive Level)
Parameter
Voh
Vol
Vin
VHys
Description
Output Voltage High
Output Voltage Low
Input Switching Threshold
Input Switching Hysteresis
Min
2.2
0.3
1.0
20
Typ
2.8
0.4
1.2
25
Max
3.2
0.6
1.5
30
Units
V
V
V
mV
Conditions
I source = 3mA
I sink = 8mA
**
**
Table 13 - FT232R UART and CBUS I/O Pin Characteristics (VCCIO = 2.8V, High Drive Level)
Parameter
Voh
Vol
Vin
VHys
Description
Output Voltage High
Output Voltage Low
Input Switching Threshold
Input Switching Hysteresis
Min
2.1
0.3
1.0
20
Typ
2.8
0.4
1.2
25
Max
3.2
0.6
1.5
30
Units
V
V
V
mV
Conditions
I source = 3mA
I sink = 8mA
**
**
**Inputs have an internal 200k? pull-up resistor to VCCIO.
Table 14 - FT232R RESET# and TEST Pin Characteristics
Parameter
Vin
VHys
Description
Input Switching Threshold
Input Switching Hysteresis
Min
1.3
50
Typ
1.6
55
Max
1.9
60
Units
V
mV
Conditions
Table 15 - FT232R USB I/O Pin (USBDP, USBDM) Characteristics
Parameter
UVoh
UVol
UVse
UCom
Description
I/O Pins Static Output ( High)
I/O Pins Static Output ( Low )
Single Ended Rx Threshold
Differential Common Mode
Min
2.8
0
0.8
0.8
Typ
Max
3.6
0.3
2.0
2.5
Units
V
V
V
V
Conditions
RI = 1.5k? to 3V3Out ( D+ )
RI = 15k? to GND ( D- )
RI = 1.5k? to 3V3Out ( D+ )
RI = 15k? to GND ( D- )
UVDif
Differential Input Sensitivity
0.2
V
UDrvZ
Driver Output Impedance
26
29
44
Ohms
***
***Driver Output Impedance includes the internal USB series resistors on USBDP and USBDM pins.
EVAL232R FT232RL USB to RS232 Evaluation Module Datasheet Version 0.90
? Future Technology Devices International Ltd. 2005
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