Datasheet
SDAS216A − APRIL 1982 − REVISED DECEMBER 1994
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443
• HOUSTON, TEXAS 77251−1443
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
SN74AS253A
UNIT
PARAMETER
TEST CONDITIONS
MIN TYP
†
MAX
UNIT
V
IK
V
CC
= 4.5 V, I
I
= −18 mA −1.2 V
V
OH
V
CC
= 4.5 V to 5.5 V, I
OH
= −2 mA V
CC
−2
V
V
OH
V
CC
= 4.5 V, I
OH
= −15 mA 2.4 3.2
V
V
OL
V
CC
= 4.5 V, I
OL
= 48 mA 0.35 0.5 V
I
OZH
V
CC
= 5.5 V, V
O
= 2.7 V 50 µA
I
OZL
V
CC
= 5.5 V, V
O
= 0.4 V −50 µA
I
I
A, B
V
CC
= 5.5 V,
V
I
= 7 V
0.2
mA
I
I
All others
V
CC
= 5.5 V, V
I
= 7 V
0.1
mA
I
IH
A, B
V
CC
= 5.5 V,
V
I
= 2.7 V
40
A
I
IH
All others
V
CC
= 5.5 V, V
I
= 2.7 V
20
µA
I
IL
A, B
V
CC
= 5.5 V,
V
I
= 0.4 V
−1
mA
I
IL
All others
V
CC
= 5.5 V, V
I
= 0.4 V
−0.5
mA
I
O
‡
V
CC
= 5.5 V, V
O
= 2.25 V −30 −112 mA
Outputs high 18 29
I
CC
V
CC
= 5.5 V
Outputs low 20 32
mA
I
CC
V
CC
= 5.5 V
Outputs disabled 21 33
mA
†
All typical values are at V
CC
= 5 V, T
A
= 25°C.
‡
The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, I
OS
.
switching characteristics (see Figure 1)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
V
CC
= 4.5 V to 5.5 V,
C
L
= 50 pF,
R1 = 500 Ω,
R2 = 500 Ω,
T
A
= MIN to MAX
§
UNIT
(INPUT)
(OUTPUT)
SN74AS253A
MIN MAX
t
PLH
A or B
Y
3 13.5
ns
t
PHL
A or B Y
3 11.5
ns
t
PLH
Data
Y
2.5 7.5
ns
t
PHL
Data
(any C)
Y
2.5 8
ns
t
PZH
OE
Any Y
2 12.5
ns
t
PZL
OE
Any Y
2.5 11.5
ns
t
PHZ
OE
Any Y
1 6
ns
t
PLZ
OE
Any Y
1 7
ns
§
For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.