Datasheet

SN74ALS620A, SN74ALS621A, SN74ALS623A, SN74AS623
OCTAL BUS TRANSCEIVERS
SDAS226A – DECEMBER 1982 – REVISED JANUARY 1995
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
recommended operating conditions
SN74ALS620A
SN74ALS623A
UNIT
MIN NOM MAX
V
CC
Supply voltage 4.5 5 5.5 V
V
IH
High-level input voltage 2 V
V
IL
Low-level input voltage 0.8 V
I
OH
High-level output current –15 mA
I
OL
Low-level output current 24 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
SN74ALS620A
SN74ALS623A
UNIT
MIN TYP
†
MAX
V
IK
V
CC
= 4.5 V, I
I
= –18 mA –1.2 V
V
CC
= 4.5 V to 5.5 V, I
OH
= –0.4 mA V
CC
–2
V
OH
V
CC
=45V
I
OH
= –3 mA 2.4 3.2
V
V
CC
=
4
.
5
V
I
OH
= –15 mA 2
V
OL
V
CC
=45V
I
OL
= 12 mA 0.25 0.4
V
V
OL
V
CC
=
4
.
5
V
I
OL
= 24 mA
‡
0.35 0.5
V
I
I
Control inputs
V
CC
=55V
V
I
= 7 V 0.1
mA
I
I
A or B ports
V
CC
=
5
.
5
V
V
I
= 5.5 V 0.1
mA
I
IH
Control inputs
V
CC
=55V
V
I
=27V
20
µA
I
IH
A or B ports
§
V
CC
=
5
.
5
V
,
V
I
=
2
.
7
V
20
µ
A
I
IL
Control inputs
V
CC
=55V
V
I
=04V
–0.1
mA
I
IL
A or B ports
§
V
CC
=
5
.
5
V
,
V
I
=
0
.
4
V
–0.1
mA
I
O
¶
V
CC
= 5.5 V, V
O
= 2.25 V –30 –112 mA
Outputs high 24 34
SN74ALS620A V
CC
= 5.5 V
Outputs low 31 44
I
CC
Outputs disabled 33 47
mA
I
CC
Outputs high 32 43
mA
SN74ALS623A V
CC
= 5.5 V
Outputs low 39 50
Outputs disabled 42 55
†
All typical values are at V
CC
= 5 V, T
A
= 25°C.
‡
Applies only to the -1 version and only if V
CC
is between 4.75 V and 5.25 V
§
For I/O ports, the parameters I
IH
and I
IL
include the off-state output current.
¶
The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, I
OS
.