AC Electrical Characteristics
54AC
=
VCC
(V)
TA −55˚C
Symbol
Parameter
to +125˚C
Units
=
(Note 8)
CL 50 pF
Min
55
Max
fmax
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
Maximum Clock
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
Frequency
90
Propagation Delay, CP to Qn
(PE Input HIGH or LOW)
Propagation Delay, CP to Qn
(PE Input HIGH or LOW)
Propagation Delay
CP to TC
1.0
1.5
1.0
1.5
1.0
1.5
1.0
1.5
1.0
1.5
1.0
1.5
13.5
9.5
12.5
9.5
ns
16.5
11.0
15.0
11.0
11.0
7.5
ns
Propagation Delay
CP to TC
ns
Propagation Delay
CET to TC
ns
Propagation Delay
CET to TC
12.0
9.0
ns
±
Note 8: Voltage Range 3.3 is 3.3V 0.3V
±
Voltage Range 5.0 is 5.0V 0.5V
AC Operating Requirements
54AC
=
VCC
TA −55˚C
Symbol
Parameter
(V)
to +125˚C
Units
=
CL 50 pF
(Note 9)
Guaranteed Minimum
ts
th
ts
th
ts
th
ts
th
tw
tw
Setup Time, HIGH or LOW
Pn to CP
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
17.0
11.0
−0.5
0
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Hold Time, HIGH or LOW
Pn to CP
Setup Time, HIGH or LOW
SR to CP
17.0
12.0
−0.5
0
Hold Time, HIGH or LOW
SR to CP
Setup Time, HIGH or LOW
PE to CP
16.0
9.5
−0.5
0
Hold Time, HIGH or LOW
PE to CP
Setup Time, HIGH or LOW
CEP or CET to CP
Hold Time, HIGH or LOW
CEP or CET to CP
Clock Pulse Width (Load)
HIGH or LOW
8.0
5.5
0
0.5
5.0
5.0
5.0
5.0
Clock Pulse Width (Count)
HIGH or LOW
±
Note 9: Voltage Range 3.3 is 3.3V 0.3V
±
Voltage Range 5.0 is 5.0V 0.5V
7
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