Datasheet

SN74S225
16 × 5 ASYNCHRONOUS FIRST-IN, FIRST-OUT MEMORY
WITH 3-STATE OUTPUTS
SDLS207B – SEPTEMBER 1976 – REVISED APRIL 1998
6
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (see Figure 1)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
TEST CONDITIONS MIN TYP
†
MAX UNIT
CLKA 10 20
f
max
CLKB
C
L
= 30 pF
10 20
MHz
UNCK IN 10 20
t
w
UNCK OUT C
L
= 30 pF 7 14 ns
t
dis
OE
Any Q C
L
= 5 pF 10 25 ns
t
en
OE
Any Q C
L
= 30 pF 25 40 ns
t
PLH
UNCK IN
Any Q
C
L
=30
p
F
50 75
ns
t
PHL
UNCK
IN
A
ny
Q
C
L
=
30
pF
50 75
ns
t
PLH
CLKA or CLKB OR C
L
= 30 pF 190 300 ns
t
PLH
UNCK IN
OR
C
L
=30
p
F
40 60
ns
t
PHL
UNCK
IN
OR
C
L
=
30
pF
30 45
ns
CLR OR 35 60
t
PHL
CLKA or CLKB
UNCK OUT
C
L
=30
p
F
25 45
ns
t
PHL
UNCK IN
UNCK
OUT
C
L
=
30
pF
270 400
ns
CLKA or CLKB IR 55 75
UNCK IN
IR
255 400
t
PLH
CLR
IR
C
L
= 30 pF
16 35
ns
OR↑
Any Q
10 20
†
All typical values are at V
CC
= 5 V, T
A
= 25°C.