MC74VHCT245A
AC ELECTRICAL CHARACTERISTICS (Input t = t = 3.0ns)
r
f
T
A
= 25°C
T = – 40 to 85°C
A
Symbol
Parameter
Test Conditions
Unit
Min
Typ
Max
Min
Max
t
t
,
Maximum Propagation Delay
A to B or B to A
V
V
= 5.0 ± 0.5V
C
C
= 15pF
= 50pF
4.9
5.4
7.7
8.7
1.0
1.0
8.5
9.5
ns
PLH
CC
L
L
PHL
t
t
,
Output Enable Time
OE to A or B
= 5.0 ± 0.5V
= 1kΩ
C
C
= 15pF
= 50pF
9.4
9.9
13.8
14.8
1.0
1.0
15.0
16.0
ns
ns
pF
PZL
CC
L
L
L
R
PZH
t
t
,
Output Disable Time
OE to A or B
V
R
= 5.0 ± 0.5V
= 1kΩ
C
= 50pF
10.1
15.4
1.0
10
1.0
16.5
1.0
10
PLZ
CC
L
PHZ
L
t
,
Output to Output Skew
V
CC
= 5.0 ± 0.5V
C
= 50pF
OSLH
L
t
(Note NO TAG)
OSHL
C
Maximum Input Capacitance
4
pF
pF
in
C
Maximum Three–State Output
Capacitance (Output in
13
out
High–Impedance State)
Typical @ 25°C, V
= 5.0V
CC
C
Power Dissipation Capacitance (Note NO TAG)
pF
16
PD
1. Parameter guaranteed by design. t = |t – t
|, t
= |t
– t |.
PHLm PHLn
OSLH
PLHm PLHn OSHL
2. C
is defined as the value of the internal equivalent capacitance which is calculated from the operating current consumption without load.
PD
Averageoperatingcurrentcanbeobtainedbytheequation:I
=C
V
f
+I
/8(perbit).C isusedtodeterminetheno–load
PD
CC(OPR)
PD CC in CC
2
dynamic power consumption; P = C
V
f
+ I
in CC
V
.
D
PD
CC
CC
NOISE CHARACTERISTICS (Input t = t = 3.0ns, C = 50pF, V
= 5.0V)
r
f
L
CC
T
A
= 25°C
Symbol
Parameter
Unit
V
Typ
Max
V
OLP
Quiet Output Maximum Dynamic V
1.2
1.6
–1.6
2.0
OL
V
OLV
Quiet Output Minimum Dynamic V
–1.2
V
OL
V
IHD
Minimum High Level Dynamic Input Voltage
Maximum Low Level Dynamic Input Voltage
V
V
ILD
0.8
V
SWITCHING WAVEFORMS
3V
DIR
1.5V
1.5V
GND
3V
3V
OE
1.5V
A or B
B or A
1.5V
GND
GND
t
t
PLZ
PZL
HIGH
IMPEDANCE
t
t
PHL
PLH
V
V
OH
A or B
A or B
1.5V
t
1.5V
V
+0.3V
OL
t
PZH
PHZ
OL
V
–0.3V
OH
1.5V
HIGH
IMPEDANCE
Figure 1.
Figure 2.
VHC Data – Advanced CMOS Logic
DL203 — Rev 1
3
MOTOROLA
ONSEMI [ ONSEMI ]
