DC Characteristics for ’AC Family Devices (Continued)
Note 2: All outputs loaded; thresholds on input associated with output under test.
Note 3: Maximum test duration 2.0 ms, one output loaded at a time.
@
@
Note 4:
I
and I
CC
3.0V are guaranteed to be less than or equal to the respective limit 5.5V V .
IN
CC
@
@
I
for 54AC 25˚C is identical to 74AC 25˚C.
CC
AC Electrical Characteristics
54AC
=
VCC
(V)
TA −55˚C
Fig.
No.
to +125˚C
Symbol
Parameter
Units
=
CL 50 pF
(Note 5)
Min
55
Max
fmax
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
Maximum Count
Frequency
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
80
Propagation Delay
CP to Qn
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
16.5
12.0
16.0
12.0
19.5
14.0
19.0
14.5
14.0
10.5
12.5
9.5
Propagation Delay
CP to Qn
Propagation Delay
CP to TC
Propagation Delay
CP to TC
Propagation Delay
CP to RC
Propagation Delay
CP to RC
Propagation Delay
CE to RC
14.0
10.0
12.5
9.5
Propagation Delay
CE to RC
Propagation Delay
U/D to RC
14.5
11.0
15.0
11.0
14.0
10.5
13.5
10.0
16.5
11.5
15.5
10.5
18.0
12.5
15.5
11.5
Propagation Delay
U/D to RC
Propagation Delay
U/D to TC
Propagation Delay
U/D to TC
Propagation Delay
Pn to Qn
Propagation Delay
Pn to Qn
Propagation Delay
PL to Qn
Propagation Delay
PL to Qn
±
Note 5: Voltage Range 3.3 is 3.3V 0.3V
±
Voltage Range 5.0 is 5.0V 0.5V
www.national.com
6
NSC [ National Semiconductor ]
