MC74VHC245
DC ELECTRICAL CHARACTERISTICS
T
A
= 25°C
T = – 40 to 85°C
A
V
CC
V
Symbol
Parameter
Test Conditions
Min
Typ
Max
Min
Max
Unit
I
Maximum Three–State
Leakage Current
V
= V or V
5.5
± 0.25
± 2.5
µA
OZ
in
IL
= V
IH
or GND
V
out
CC
or GND
I
Maximum Quiescent
Supply Current
V
in
= V
5.5
4.0
40.0
µA
CC
CC
AC ELECTRICAL CHARACTERISTICS (Input t = t = 3.0ns)
r
f
T
A
= 25°C
T
A
= – 40 to 85°C
Symbol
Parameter
Test Conditions
Unit
Min
Typ
Max
Min
1.0
Max
t
t
,
Maximum Propagation Delay,
A to B or B to A
V
V
V
= 3.3 ± 0.3V
= 5.0 ± 0.5V
= 3.3 ± 0.3V
C
C
= 15pF
= 50pF
5.8
8.3
8.4
11.9
10.0
13.5
ns
PLH
CC
CC
CC
L
L
1.0
PHL
C
C
= 15pF
= 50pF
4.0
5.5
5.5
7.5
1.0
1.0
6.5
8.5
L
L
t
t
,
Output Enable Time
OE to A or B
C
C
= 15pF
= 50pF
8.5
11.0
13.2
16.7
1.0
1.0
15.5
19.0
ns
ns
PZL
L
L
R
= 1 kΩ
PZH
L
V
R
= 5.0 ± 0.5V
= 1 kΩ
C
L
C
L
= 15pF
= 50pF
5.8
7.3
8.5
10.6
1.0
1.0
10.0
12.0
CC
L
t
t
,
Output Disable Time
OE to A or B
V
R
= 3.3 ± 0.3V
= 1 kΩ
C
C
C
C
= 50pF
= 50pF
= 50pF
= 50pF
11.5
15.8
9.7
1.5
1.0
10
1.0
18.0
11.0
1.5
PLZ
CC
L
L
L
L
PHZ
L
V
R
= 5.0 ± 0.5V
= 1 kΩ
7.0
1.0
CC
L
t
t
,
Output to Output Skew
V
CC
= 3.3 ± 0.3V
(Note 1.)
pF
ns
pF
pF
OSLH
OSHL
V
= 5.0 ± 0.5V
CC
(Note 1.)
1.0
C
Maximum Input Capacitance
DIR, OE
4
8
10
in
C
Maximum Three–State
I/O Capacitance
I/O
Typical @ 25°C, V
= 5.0V
CC
C
Power Dissipation Capacitance (Note 2.)
pF
21
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
0.9
1.2
–1.2
3.5
OL
V
OLV
Quiet Output Minimum Dynamic V
–0.9
V
OL
V
IHD
Minimum High Level Dynamic Input Voltage
Maximum Low Level Dynamic Input Voltage
V
V
ILD
1.5
V
VHC Data – Advanced CMOS Logic
DL203 — Rev 1
3
MOTOROLA