MC74VHC240
http://onsemi.com
4
AC ELECTRICAL CHARACTERISTICS (Input t
r
= t
f
= 3.0ns)
Symbol Parameter Test Conditions
T
A
= 25°C T
A
= − 40 to 85°C
Unit
Min Typ Max Min Max
t
PLH
,
t
PHL
Maximum Propagation Delay,
A to YA
or B to YB
V
CC
= 3.3 ± 0.3V C
L
= 15pF
C
L
= 50pF
5.3
7.8
7.5
11.0
1.0
1.0
9.0
12.5
ns
V
CC
= 5.0 ± 0.5V C
L
= 15pF
C
L
= 50pF
3.6
5.1
5.5
7.5
1.0
1.0
6.5
8.5
t
PZL
,
t
PZH
Output Enable Time
OEA
to YA or OEB to YB
V
CC
= 3.3 ± 0.3V C
L
= 15pF
R
L
= 1kΩ C
L
= 50pF
6.6
9.1
10.6
14.1
1.0
1.0
12.5
16.0
ns
V
CC
= 5.0 ± 0.5V C
L
= 15pF
R
L
= 1kΩ C
L
= 50pF
4.7
6.2
7.3
9.3
1.0
1.0
8.5
10.5
t
PLZ
,
t
PHZ
Output Disable Time
OEA
to YA or OEB to YB
V
CC
= 3.3 ± 0.3V C
L
= 50pF
R
L
= 1kΩ
10.3 14.0 1.0 16.0
ns
V
CC
= 5.0 ± 0.5V C
L
= 50pF
R
L
= 1kΩ
6.7 9.2 1.0 10.5
t
OSLH
,
t
OSHL
Output to Output Skew
V
CC
= 3.3 ± 0.3V C
L
= 50pF
(Note 1.)
1.5 1.5
ns
V
CC
= 5.0 ± 0.5V C
L
= 50pF
(Note 1.)
1.0 1.0
C
in
Maximum Input Capacitance 4 10 10 pF
C
out
Maximum Three−State Output
Capacitance (Output in
High−Impedance State)
6 pF
C
PD
Power Dissipation Capacitance (Note 2.)
Typical @ 25°C, V
CC
= 5.0V
pF
17
1. Parameter guaranteed by design. t
OSLH
= |t
PLHm
− t
PLHn
|, t
OSHL
= |t
PHLm
− t
PHLn
|.
2. C
PD
is defined as the value of the internal equivalent capacitance which is calculated from the operating current consumption without load.
Average operating current can be obtained by the equation: I
CC(OPR
)
= C
PD
V
CC
f
in
+ I
CC
/ 8 (per bit). C
PD
is used to determine the no−load
dynamic power consumption; P
D
= C
PD
V
CC
2
f
in
+ I
CC
V
CC
.
NOISE CHARACTERISTICS (Input t
r
= t
f
= 3.0ns, C
L
= 50pF, V
CC
= 5.0V)
Symbol
Parameter
T
A
= 25°C
Unit
Typ Max
V
OLP
Quiet Output Maximum Dynamic V
OL
0.6 0.9 V
V
OLV
Quiet Output Minimum Dynamic V
OL
− 0.6 − 0.9 V
V
IHD
Minimum High Level Dynamic Input Voltage 3.5 V
V
ILD
Maximum Low Level Dynamic Input Voltage 1.5 V
