Datasheet

Copyright © 2010 Future Technology Devices International Limited 17
Document Reference No.: FT_000054
TTL-232R TTL TO USB SERIAL CONVERTER RANGE OF CABLES Datasheet Version 2.02
Clearance No.: FTDI# 53
6.3.1 TTL-232R-5V-WE Electrical Parameters
Parameter
Description
Minimum
Typical
Maximum
Units
Conditions
VCC
Output Power Voltage
4.25
5.0
5.25
V
Dependant on the USB port
that the TTL-232R-5V-WE is
connected to
I
O
Output Power Current
-
75
mA
Must be less that 2.5mA
during suspend.
T
Operating Temperature
Range
-40
+85
o
C
Table 6.2 TTL-232R-5V-WE I/O Operating Parameters
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
1.0
1.2
1.5
V
VHys
Input Switching Hysteresis
20
25
30
mV
Table 6.3 TTL-232R-5V-WE I/O Pin Characteristics
6.3.2 TTL-232R-3V3-WE Electrical Parameters
Parameter
Description
Minimum
Typical
Maximum
Units
Conditions
VCC
Output Power Voltage
4.25
5.0
5.25
V
Dependant on the USB port
that the TTL-232R-3V3-WE
is connected to
I
O
Output Power Current
-
75
mA
Must be less that 2.5mA
during suspend.
T
Operating Temperature
Range
-40
+85
o
C
Table 6.4 TTL-232R-3V3-WE I/O Operating Parameters
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 6.5 TTL-232R-3V3-WE I/O Pin Characteristics