MC74LCX245
http://onsemi.com
5
DYNAMIC SWITCHING CHARACTERISTICS
T
A
= +25°C
Symbol Characteristic Condition Min Typ Max Unit
V
OLP
Dynamic LOW Peak Voltage (Note 4) 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
0.8
0.6
V
V
V
OLV
Dynamic LOW Valley Voltage (Note 4) 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
−0.8
−0.6
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 Parameter Condition Typical Unit
C
IN
Input Capacitance V
CC
= 3.3 V, V
I
= 0 V or V
CC
7 pF
C
I/O
Input/Output Capacitance V
CC
= 3.3 V, V
I
= 0 V or V
CC
8 pF
C
PD
Power Dissipation Capacitance 10 MHz, V
CC
= 3.3 V, V
I
= 0 V or V
CC
25 pF
WAVEFORM 1 − PROPAGATION DELAYS
t
R
= t
F
= 2.5 ns, 10% to 90%; f = 1 MHz; t
W
= 500 ns
V
CC
0 V
V
OH
V
OL
An, Bn
t
PHL
t
PLH
WAVEFORM 2 − OUTPUT ENABLE AND DISABLE TIMES
t
R
= t
F
= 2.5 ns, 10% to 90%; f = 1 MHz; t
W
= 500 ns
0 V
OE, T/R
t
PZH
t
PHZ
t
PZL
t
PLZ
Vmo
Vmo
VmiVmi
Vmo Vmo
Figure 3. AC Waveforms
Vmi
V
OH
V
HZ
V
OL
V
CC
V
LZ
Bn, An
An, Bn
An, Bn
Vmi
Symbol
V
CC
3.3 V + 0.3 V 2.7 V 2.5 V + 0.2 V 5.0 V
Vmi 1.5 V 1.5 V V
CC
/2 V
CC
/2
Vmo 1.5 V 1.5 V V
CC
/2 V
CC
/2
V
HZ
V
OL
+ 0.3 V V
OL
+ 0.3 V V
OL
+ 0.15 V V
OL
+ 0.15 V
V
LZ
V
OH
− 0.3 V V
OH
− 0.3 V V
OH
− 0.15 V V
OH
− 0.15 V
