Datasheet

SN74AHC244-EP
OCTAL BUFFER/DRIVER
WITH 3-STATE OUTPUTS
SCLS486A – MAY 2003 – REVISED JUNE 2003
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
V
CC
T
A
= 25°C
MIN
MAX
UNIT
PARAMETER
TEST
CONDITIONS
V
CC
MIN TYP MAX
MIN
MAX
UNIT
2 V 1.9 2 1.9
I
OH
= –50 A
3 V 2.9 3 2.9
V
OH
4.5 V 4.4 4.5 4.4
V
OH
I
OH
= –4 mA
3 V 2.58 2.48
I
OH
= –8 mA
4.5 V 3.94 3.8
2 V 0.1 0.1
I
OL
= 50 A
3 V 0.1 0.1
V
OL
4.5 V 0.1 0.1
V
OL
I
OL
= 4 mA
3 V 0.36 0.5
I
OL
= 8 mA
4.5 V 0.36 0.5
I
I
V
I
= 5.5 V or GND 0 V to 5.5 V ±0.1 ±1 A
I
OZ
V
O
= V
CC
or GND, V
I
(OE) = V
IL
or V
IH
5.5 V ±0.25 ±2.5 A
I
CC
V
I
= V
CC
or GND, I
O
= 0 5.5 V 4 40 A
C
i
V
I
= V
CC
or GND 5 V 2 10 pF
C
o
V
O
= V
CC
or GND 5 V 3.5 pF
switching characteristics over recommended operating free-air temperature range,
V
CC
= 3.3 V ± 0.3 V (unless otherwise noted) (see Figure 1)
PARAMETER
FROM TO LOAD
T
A
= 25°C
MIN
MAX
UNIT
PARAMETER
(INPUT) (OUTPUT) CAPACITANCE
MIN TYP MAX
MIN
MAX
UNIT
t
PLH
A
Y
C
L
=15
p
F
5.8 8.4 1 10
ns
t
PHL
A
Y
C
L
=
15
pF
5.8 8.4 1 10
ns
t
PZH
OE
Y
C
L
=15
p
F
6.6 10.6 1 12.5
ns
t
PZL
OE
Y
C
L
=
15
pF
6.6 10.6 1 12.5
ns
t
PHZ
OE
Y
C
L
=15
p
F
5 9.7 1 11
ns
t
PLZ
OE
Y
C
L
=
15
pF
5 9.7 1 11
ns
t
PLH
A
Y
C
L
=50
p
F
8.3 11.9 1 13.5
ns
t
PHL
A
Y
C
L
=
50
pF
8.3 11.9 1 13.5
ns
t
PZH
OE
Y
C
L
=50
p
F
9.1 14.1 1 16
ns
t
PZL
OE
Y
C
L
=
50
pF
9.1 14.1 1 16
ns
t
PHZ
OE
Y
C
L
=50
p
F
10.3 14 1 16
ns
t
PLZ
OE
Y
C
L
=
50
pF
10.3 14 1 16
ns