Datasheet

SN74S225
16 × 5 ASYNCHRONOUS FIRST-IN, FIRST-OUT MEMORY
WITH 3-STATE OUTPUTS
SDLS207B – SEPTEMBER 1976 – REVISED APRIL 1998
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
recommended operating conditions
MIN NOM MAX UNIT
V
CC
Supply voltage 4.75 5 5.25 V
V
IH
High-level input voltage 2 V
V
IL
Low-level input voltage 0.8 V
I
OH
High level out
p
ut current
Q outputs –6.5
mA
I
OH
High
-
le
v
el
o
u
tp
u
t
c
u
rrent
All other outputs –3.2
mA
I
OL
Low level out
p
ut current
Q outputs 16
mA
I
OL
Lo
w-
le
v
el
o
u
tp
u
t
c
u
rrent
All other outputs 8
mA
T
A
Operating free-air temperature 0 70 °C
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP
†
MAX UNIT
V
IK
V
CC
= 4.75 V, I
I
= –18 mA –1.2 V
V
OH
Q outputs V
CC
= 4.75 V, I
OL
= –6.5 mA 2.4 2.9
V
V
OH
All others V
CC
= 4.75 V, I
OL
= –3.2 mA 2.4 2.9
V
V
OL
Q outputs V
CC
= 4.75 V, I
OL
= 16 mA 0.35 0.5
V
V
OL
All others V
CC
= 4.75 V, I
OL
= 8 mA 0.35 0.5
V
I
OZH
V
CC
= 5.25 V, V
O
= 2.4 V 50 µA
I
OZL
V
CC
= 5.25 V, V
O
= 0.5 V –50 µA
I
I
V
CC
= 5.25 V, V
I
= 5.5 V 1 mA
I
IH
Data
V
CC
= 5 25 V
V
I
=27V
40
µA
I
IH
All others
V
CC
=
5
.
25
V
,
V
I
=
2
.
7
V
25
µ
A
I
IL
Data
V
CC
= 5 25 V
V
I
=05V
–1
mA
I
IL
All others
V
CC
=
5
.
25
V
,
V
I
=
0
.
5
V
–0.25
mA
I
OS
‡
V
CC
= 5.25 V, V
O
= 0 –30 –100 mA
I
CC
§
V
CC
= 5.25 V 80 120 mA
†
All typical values are at V
CC
= 5 V, T
A
= 25°C.
‡
Duration of the short circuit should not exceed one second.
§
I
CC
is measured with all inputs grounded and the outputs open.
timing requirements over recommended operating conditions (unless otherwise noted) (see
Figure 1)
MIN NOM MAX UNIT
f
clock
Clock frequency 10 MHz
CLKA or CLKB high 25
t
w
Pulse duration
UNCK IN low 7
ns
CLR low 40
t
Set p time before CLKA↑ or CLKB↑
Data (see Note 3) –20
ns
t
su
S
etup t
i
me
b
e
f
ore
CLKA↑
or
CLKB↑
CLR inactive 25
ns
t
h
Hold time after CLKA↑ or CLKB↑ 70 ns
NOTE 3: Data must be set up within 20 ns after the load-clock positive transition.