MC74VHCT125A
www.onsemi.com
4
AC ELECTRICAL CHARACTERISTICS (Input t
r
= t
f
= 3.0 ns)
Symbol Parameter Test Conditions
T
A
= 25°C T
A
= ≤ 85°C T
A
≤ 125°C
Unit
Min Typ Max Min Max Min Max
t
PLH
,
t
PHL
Maximum Propagation Delay,
A to Y
V
CC
= 3.3 $ 0.3 V C
L
= 15 pF
C
L
= 50 pF
5.6
8.1
8.0
11.5
1.0
1.0
9.5
13.0
12.0
16.0
ns
V
CC
= 5.0 $ 0.5 V C
L
= 15 pF
C
L
= 50 pF
3.8
5.3
5.5
7.5
1.0
1.0
6.5
8.5
8.5
10.5
t
PZL
,
t
PZH
Maximum Output Enable
TIme,OE
to Y
V
CC
= 3.3 $ 0.3 V C
L
= 15 pF
R
L
= 1.0 kW C
L
= 50 pF
5.4
7.9
8.0
11.5
1.0
1.0
9.5
13.0
11.5
15.0
ns
V
CC
= 5.0 $ 0.5 V C
L
= 15 pF
R
L
= 1.0 kW C
L
= 50 pF
3.6
5.1
5.1
7.1
1.0
1.0
6.0
8.0
7.5
9.5
t
PLZ
,
t
PHZ
Maximum Output Disable
Time,OE
to Y
V
CC
= 3.3 $ 0.3 V C
L
= 50 pF
R
L
= 1.0 kW
9.5 13.2 1.0 15.0 18.0
ns
V
CC
= 5.0 $ 0.5 V C
L
= 50 pF
R
L
= 1.0 kW
6.1 8.8 1.0 10.0 12.0
t
OSLH
,
t
OSHL
Output−to−Output Skew
V
CC
= 3.3 $ 0.3 V C
L
= 50 pF
(Note 1)
1.5 1.5 2.0
ns
V
CC
= 5.0 $ 0.5 V C
L
= 50 pF
(Note 1)
1.0 1.0 1.5
C
in
Maximum Input Capacitance 4 10 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
14
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
/ 4 (per buffer). 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
= 3.0 ns, C
L
= 50 pF, V
CC
= 5.0 V)
Symbol
Characteristic
T
A
= 25°C
Unit
Typ Max
V
OLP
Quiet Output Maximum Dynamic V
OL
0.3 0.8 V
V
OLV
Quiet Output Minimum Dynamic V
OL
− 0.3 − 0.8 V
V
IHD
Minimum High Level Dynamic Input Voltage 3.5 V
V
ILD
Maximum Low Level Dynamic Input Voltage 1.5 V
