Datasheet

SN54AC244, SN74AC244
OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCAS514E − JUNE 1995 − REVISED OCTOBER 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
T
A
= 25°C SN54AC244 SN74AC244
UNIT
PARAMETER TEST CONDITIONS V
CC
MIN TYP MAX MIN MAX MIN MAX
UNIT
3 V 2.9 2.9 2.9
I
OH
= −50 μA
4.5 V 4.4 4.4 4.4
I
OH
50
μA
5.5 V 5.4 5.4 5.4
V
I
OH
= −12 mA 3 V 2.56 2.4 2.46
V
V
OH
I 24 A
4.5 V 3.86 3.7 3.76
V
I
OH
= −24 mA
5.5 V 4.86 4.7 4.76
I
OH
= −50 mA
†
5.5 V 3.85
I
OH
= −75 mA
†
5.5 V 3.85
3 V 0.1 0.1 0.1
I
OL
= 50 μA
4.5 V 0.1 0.1 0.1
I
OL
50
μA
5.5 V 0.1 0.1 0.1
V
I
OL
= 12 mA 3 V 0.36 0.5 0.44
V
V
OL
I 24 mA
4.5 V 0.36 0.5 0.44
V
I
OL
= 24 mA
5.5 V 0.36 0.5 0.44
I
OL
= 50 mA
†
5.5 V 1.65
I
OL
= 75 mA
†
5.5 V 1.65
I
Data inputs V
I
= V
CC
or GND
55V
± 0.1 ±1 ±1
A
I
I
Control inputs V
I
= V
CC
or GND
5.5 V
± 0.1 ±1 ±1
μA
I
OZ
V
O
= V
CC
or GND,
V
I(OE)
= V
IL
or V
IH
5.5 V ± 0.25 ±5 ± 2.5 μA
I
CC
V
I
= V
CC
or GND, I
O
= 0 5.5 V 4 80 40 μA
C
i
V
I
= V
CC
or GND 5 V 2.5 pF
†
Not more than one output should be tested at a time, and the duration of the test should not exceed 10 ms.
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
T
A
= 25°C SN54AC244 SN74AC244
UNIT
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
MIN TYP MAX MIN MAX MIN MAX
UNIT
t
PLH
A
Y
2 6.5 9 1 12.5 1.5 10
ns
t
PHL
A Y
2 6.5 9 1 12 2 10
ns
t
PZH
OE
Y
2 6 10.5 1 11.5 1.5 11
ns
t
PZL
OE
Y
2.5 7.5 10 1 13 2 11
ns
t
PHZ
OE
Y
3 7 10 1 12.5 1.5 10.5
ns
t
PLZ
OE
Y
2.5 7.5 10.5 1 13 2.5 11.5
ns