AC Electrical Characteristics
Symbol
Parameter
54ABT
TA −55˚C to +125˚C
Units
=
=
VCC 4.5V to 5.5V
=
CL 50 pF
Min
Max
fmax
Max Clock
150
MHz
ns
Frequency
tPLH
tPHL
Propagation Delay
CP to On
2.2
2.8
6.0
6.8
AC Operating Requirements
54ABT
=
TA −55˚C to +125˚C
=
Symbol
Parameter
VCC 4.5V to 5.5V
Units
=
CL 50 pF
Min
Max
ts(H)
Setup Time, HIGH
or LOW Dn to CP
Hold Time, HIGH
or LOW Dn to CP
Setup Time, HIGH
or LOW CE to CP
Hold Time, HIGH
or LOW CE to CP
Pulse Width, CP,
HIGH or LOW
2.0
2.0
1.8
1.8
3.0
3.0
1.0
1.0
3.3
3.3
ns
ns
ns
ns
ns
ts(L)
th(H)
th(L)
ts(H)
ts(L)
th(H)
th(L)
tw(H)
tw(L)
Capacitance
Symbol
Parameter
Input Capacitance
Output Capacitance
Typ
5
Units
Conditions
= =
VCC 0V, TA 25˚C
CIN
COUT (Note 5)
pF
pF
=
VCC 5.0V
9
=
C is measured at frequency f 1 MHz, per MIL-STD-883B, Method 3012.
OUT
Note 5:
www.national.com
4
NSC [ National Semiconductor ]
