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MCS7840
USB-2.0 to Four Serial Ports
Page 38
Rev.
1.2
DC Characteristics of 3.3V I/O Cells
Symbol
Parameter
Condition
Min
Typ
Max
Units
Vcc
K
Core Power Supply
Core Area
1.62
1.8
1.98
V
Vcc
3IO
Power Supply
3.3V I/O
2.97
3.3
3.63
V
Vi
L
Input Low Voltage
LVTTL
0.8
V
Vi
H
Input High Voltage
LVTTL
2.0
V
Vt
Switching Threshold
LVTTL
1.5
V
Vt-
Vt+
Schmitt Trigger
Threshold Voltage
LVTTL
0.8
1.1
1.6
2.0
V
Vo
L
Output Low Voltage
Io
L= 2 to 24mA
0.4
V
Vo
H
Output High Voltage
Io
H= -2 to -24mA
2.4
V
DC Characteristics of 5V Tolerant I/O Cells
Symbol
Parameter
Condition
Min
Typ
Max
Units
Vcc
5A
5V Power Supply
5V I/O
4.5
5.0
5.5
V
Vi
L
Input Low Voltage
LVTTL
0.8
V
Vi
H
Input High Voltage
LVTTL
2.0
V
Vt
Switching Threshold
LVTTL
1.5
V
Vt-
Vt+
Schmitt Trigger
Threshold Voltage
LVTTL
0.8
1.1
1.6
2.0
V
Vo
H
Output Low Voltage
Io
L
=
2 to 24 mA
0.4
V
Vo
H
Output High Voltage
Io
H
=
-2 to -24 mA
2.4
V
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