Datasheet

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74VHC245
Noise Characteristics
Note 3: Parameter guaranteed by design.
AC Electrical Characteristics
Note 4: Parameter guaranteed by design. t
OSLH
|t
PLH max
t
PLH min
|; t
OSHL
|t
PHL max
t
PHL min
|
Note 5: 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).
Symbol Parameter
V
CC
T
A
25 C
Units Conditions
(V) Typ Limits
V
OLP
Quiet Output Maximum 5.0 0.9 1.2 V C
L
50 pF
(Note 3) Dynamic V
OL
V
OLV
Quiet Output Minimum 5.0 0.9 1.2 V C
L
50 pF
(Note 3) Dynamic V
OL
V
IHD
Minimum HIGH Level 5.0 3.5 V C
L
50 pF
(Note 3) Dynamic Input Voltage
V
ILD
Maximum LOW Level 5.0 1.5 V C
L
50 pF
(Note 3) Dynamic Input Voltage
Symbol Parameter
V
CC
T
A
25 CT
A
40 C to 85 C
Units Conditions
(V) Min Typ Max Min Max
t
PLH
Propagation Delay 3.3 0.3 5.8 8.4 1.0 10.0
ns
C
L
15 pF
t
PHL
Time 8.3 11.9 1.0 13.5 C
L
50 pF
5.0 0.5 4.0 5.5 1.0 6.5
ns
C
L
15 pF
5.5 7.5 1.0 8.5 C
L
50 pF
t
PZL
3-STATE Output 3.3 0.3 8.5 13.2 1.0 15.5
ns
R
L
1 k
C
L
15 pF
t
PZH
Enable Time 11.0 16.7 1.0 19.0 C
L
50 pF
5.0 0.5 5.8 8.5 1.0 10.0
ns
C
L
15 pF
7.3 10.6 1.0 12.0 C
L
50 pF
t
PLZ
3-STATE Output 3.3 0.3 11.5 15.8 1.0 18.0
ns R
L
1 k
C
L
50 pF
t
PHZ
Disable Time 5.0 0.5 7.0 9.7 1.0 11.0 C
L
50 pF
t
OSLH
Output to Output 3.3 0.3 1.5 1.5
ns (Note 4)
C
L
50 pF
t
OSHL
Skew 5.0 0.5 1.0 1.0 C
L
50 pF
C
IN
Input Capacitance 4 10 10 pF V
CC
Open
(T/R
, OE)
C
I/O
Output Capacitance 8 pF V
CC
5.0V
C
PD
Power Dissipation 21 pF (Note 5)
Capacitance