Datasheet
SDFS063A − D2932, MARCH 1987 − REVISED OCTOBER 1993
2−3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443
• HOUSTON, TEXAS 77251−1443
recommended operating conditions
SN54F244 SN74F244
UNIT
MIN NOM MAX MIN NOM MAX
UNIT
V
CC
Supply voltage 4.5 5 5.5 4.5 5 5.5 V
V
IH
High-level input voltage 2 2 V
V
IL
Low-level input voltage 0.8 0.8 V
I
IK
Input clamp current −18 −18 mA
I
OH
High-level output current −12 −15 mA
I
OL
Low-level output current 48 64 mA
T
A
Operating free-air temperature −55 125 0 70 °C
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
SN54F244 SN74F244
UNIT
PARAMETER
TEST CONDITIONS
MIN TYP
†
MAX MIN TYP
†
MAX
UNIT
V
IK
V
CC
= 4.5 V, I
I
= −18 mA −1.2 −1.2 V
I
OH
= − 3 mA 2.4 3.3 2.4 3.3
V
OH
V
CC
= 4.5 V
I
OH
= − 12 mA 2 3.2
V
V
OH
V
CC
= 4.5 V
I
OH
= − 15 mA 2 3.1
V
V
CC
= 4.75 V, I
OH
= − 3 mA 2.7
V
OL
V
CC
= 4.5 V
I
OL
= 48 mA 0.38 0.55
V
V
OL
V
CC
= 4.5 V
I
OL
= 64 mA 0.42 0.55
V
I
OZH
V
CC
= 5.5 V, V
O
= 2.7 V 50 50 µA
I
OZL
V
CC
= 5.5 V, V
O
= 0.5 V −50 −50 µA
I
I
V
CC
= 5.5 V, V
I
= 7 V 0.1 0.1 mA
I
IH
V
CC
= 5.5 V, V
I
= 2.7 V 20 20 µA
I
IL
OE
V
CC
= 5.5 V,
V
I
= 0.5 V
−1 −1
mA
I
IL
Any A
V
CC
= 5.5 V, V
I
= 0.5 V
− 1.6 − 1.6
mA
I
OS
‡
V
CC
= 5.5 V, V
O
= 0 −100 −225 −100 −225 mA
V
CC
= 5.5 V,
Outputs high 40 60 40 60
I
CC
V
CC
= 5.5 V,
Outputs open
Outputs low 60 90 60 90
mA
I
CC
Outputs open
Outputs disabled 60 90 60 90
mA
†
All typical values are at V
CC
= 5 V, T
A
= 25°C.
‡
Not more than one output should be shorted at a time, and the duration of the short circuit should not exceed one second.