Page 11
Table 7 - 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 8 - 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 9 - 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 10 - 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 200kΩ pull-up resistor to VCCIO.
Table 11 - 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 12 - USB I/O Pin (USBDP, USBDM) Characteristics
Parameter
UVoh
UVol
UVse
UCom
UVDif
UDrvZ
Description
I/O Pins Static Output ( High)
I/O Pins Static Output ( Low )
Single Ended Rx Threshold
Differential Common Mode
Differential Input Sensitivity
Driver Output Impedance
Min
2.8
0
0.8
0.8
0.2
26
Typ
Max
3.6
0.3
2.0
2.5
Units
V
V
V
V
V
Conditions
RI = 1.5kΩ
to 3V3Out ( D+ )
RI = 15kΩ to GND ( D- )
RI = 1.5kΩ
to 3V3Out ( D+ )
RI = 15kΩ to GND ( D- )
29
44
Ohms
***
***Driver Output Impedance includes the internal USB series resistors on USBDP and USBDM pins.
MM232R Mini USB-Serial UART Development Module Datasheet Version 1.00
© Future Technology Devices International Ltd. 2005
FTDI [ FUTURE TECHNOLOGY DEVICES INTERNATIONAL LTD. ]
