Datasheet

© Copyright 2005-2011 Future Technology Devices International Ltd
13
Document Reference No.: FT_000051
UM232R USB - Serial UART Development Module
Datasheet Version 1.1
Clearance No.: FTDI# 125
Parameter
Description
Minimum
Typical
Maximum
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 = 2mA
Vin
Input Switching Threshold
1.3
1.6
1.9
V
**
Vhys
Input Switching Hysteresis
50
55
60
mV
**
Table 6.3 UART and CBUS I/O Pin Characteristics (VCCIO = 5.0V, Standard Drive Level)
Parameter
Description
Minimum
Typical
Maximum
Units
Conditions
Voh
Output Voltage High
2.2
2.7
3.2
V
I source = 1mA
Vol
Output Voltage Low
0.3
0.4
0.5
V
I sink = 2mA
Vin
Input Switching Threshold
1.0
1.2
1.5
V
**
Vhys
Input Switching Hysteresis
20
25
30
mV
**
Table 6.4 UART and CBUS I/O Pin Characteristics (VCCIO = 3.3V, Standard Drive Level)
Parameter
Description
Minimum
Typical
Maximum
Units
Conditions
Voh
Output Voltage High
2.1
2.6
3.1
V
I source = 1mA
Vol
Output Voltage Low
0.3
0.4
0.5
V
I sink = 2mA
Vin
Input Switching Threshold
1.0
1.2
1.5
V
**
Vhys
Input Switching Hysteresis
20
25
30
mV
**
Table 6.5 UART and CBUS I/O Pin Characteristics (VCCIO = 2.8V, Standard Drive Level)
Parameter
Description
Minimum
Typical
Maximum
Units
Conditions
Voh
Output Voltage High
3.2
4.1
4.9
V
I source = 6mA
Vol
Output Voltage Low
0.3
0.4
0.6
V
I sink = 6mA
Vin
Input Switching Threshold
1.3
1.6
1.9
V
**
Vhys
Input Switching Hysteresis
50
55
60
mV
**
Table 6.6 UART and CBUS I/O Pin Characteristics (VCCIO = 5.0V, High Drive Level)
Parameter
Description
Minimum
Typical
Maximum
Units
Conditions
Voh
Output Voltage High
2.2
2.8
3.2
V
I source = 3mA
Vol
Output Voltage Low
0.3
0.4
0.6
V
I sink = 8mA
Vin
Input Switching Threshold
1.0
1.2
1.5
V
**
Vhys
Input Switching Hysteresis
20
25
30
mV
**
Table 6.7 UART and CBUS I/O Pin Characteristics (VCCIO = 3.3V, High Drive Level)