MC74LCX245
DYNAMIC SWITCHING CHARACTERISTICS
T
A
= +25°C
Symbol
V
OLP
V
OLV
Characteristic
Dynamic LOW Peak Voltage (Note 4)
Dynamic LOW Valley Voltage (Note 4)
Condition
V
CC
= 3.3 V, C
L
= 50 pF, V
IH
= 3.3 V, V
IL
= 0 V
V
CC
= 2.5 V, C
L
= 30 pF, V
IH
= 2.5 V, V
IL
= 0 V
V
CC
= 3.3 V, C
L
= 50 pF, V
IH
= 3.3 V, V
IL
= 0 V
V
CC
= 2.5 V, C
L
= 30 pF, V
IH
= 2.5 V, V
IL
= 0 V
Min
Typ
0.8
0.6
−0.8
−0.6
Max
Unit
V
V
V
V
4. Number of outputs defined as “n”. Measured with “n−1” outputs switching from HIGH−to−LOW or LOW−to−HIGH. The remaining output is
measured in the LOW state.
CAPACITIVE CHARACTERISTICS
Symbol
C
IN
C
I/O
C
PD
Parameter
Input Capacitance
Input/Output Capacitance
Power Dissipation Capacitance
Condition
V
CC
= 3.3 V, V
I
= 0 V or V
CC
V
CC
= 3.3 V, V
I
= 0 V or V
CC
10 MHz, V
CC
= 3.3 V, V
I
= 0 V or V
CC
Typical
7
8
25
Unit
pF
pF
pF
OE, T/R
V
CC
An, Bn
Vmi
t
PLH
Vmo
Vmi
0V
t
PHL
V
OH
Bn, An
Vmo
V
OL
An, Bn
Vmo
t
PZL
t
PLZ
An, Bn
t
PZH
Vmo
Vmi
t
PHZ
Vmi
V
CC
0V
V
OH
V
HZ
V
LZ
V
OL
WAVEFORM 1 − PROPAGATION DELAYS
t
R
= t
F
= 2.5 ns, 10% to 90%; f = 1 MHz; t
W
= 500 ns
WAVEFORM 2 − OUTPUT ENABLE AND DISABLE TIMES
t
R
= t
F
= 2.5 ns, 10% to 90%; f = 1 MHz; t
W
= 500 ns
V
CC
Symbol
Vmi
Vmo
V
HZ
V
LZ
3.3 V
±
0.3 V
1.5 V
1.5 V
V
OL
+ 0.3 V
V
OH
− 0.3 V
2.7 V
1.5 V
1.5 V
V
OL
+ 0.3 V
V
OH
− 0.3 V
2.5 V
±
0.2 V
V
CC
/2
V
CC
/2
V
OL
+ 0.15 V
V
OH
− 015 V
Figure 3. AC Waveforms
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