www.fairchildsemi.com 4
74F189
AC Electrical Characteristics
AC Operating Requirements
Symbol Parameter
T
A
= +25°CT
A
= −55°C to +125°CT
A
= 0°C to +70°C
Units
V
CC
= +5.0V V
CC
= +5.0V V
CC
= +5.0V
C
L
= 50 pF C
L
= 50 pF C
L
= 50 pF
Min Typ Max Min Max Min Max
t
PLH
Access Time, HIGH or LOW 10.0 18.5 26.0 9.0 32.0 10.0 27.0
ns
t
PHL
A
n
to O
n
8.0 13.5 19.0 8.0 23.0 8.0 20.0
t
PZH
Access Time, HIGH or LOW 3.5 6.0 8.5 3.5 10.5 3.5 9.5
ns
t
PZL
CS to O
n
5.0 9.0 13.0 5.0 15.0 5.0 14.0
t
PHZ
Disable Time, HIGH or LOW 2.0 4.0 6.0 2.0 8.0 2.0 7.0
ns
t
PLZ
CS to O
n
3.0 5.5 8.0 2.5 10.0 3.0 9.0
t
PZH
Write Recovery Time, 6.5 15.0 28.0 6.5 37.5 6.5 29.0
ns
t
PZL
HIGH or LOW WE to O
n
6.5 11.0 15.5 6.5 17.5 6.5 16.5
t
PHZ
Disable Time, HIGH or LOW 4.0 7.0 10.0 3.5 12.0 4.0 11.0
ns
t
PLZ
WE to O
n
5.0 9.0 13.0 5.0 15.0 5.0 14.0
Symbol Parameter
T
A
= +25°CT
A
= −55°C to +125°CT
A
= 0°C to +70°C
UnitsV
CC
= +5.0V V
CC
= +5.0V V
CC
= +5.0V
Min Max Min Max Min Max
t
S
(H) Setup Time, HIGH or LOW 0 0 0
ns
t
S
(L) A
n
to WE 000
t
H
(H) Hold Time, HIGH or LOW 2.0 2.0 2.0
t
H
(L) A
n
to WE 2.0 2.0 2.0
t
S
(H) Setup Time, HIGH or LOW 10.0 11.0 10.0
ns
t
S
(L) D
n
to WE 10.0 11.0 10.0
t
H
(H) Hold Time, HIGH or LOW 0 2.0 0
t
H
(L) D
n
to WE 02.00
t
S
(L) Setup Time, LOW 0 0 0
ns
CS to WE
t
H
(L) Hold Time, LOW 6.0 7.5 6.0
CS
to WE
t
W
(L) WE Pulse Width, LOW 6.0 15.0 6.0 ns