Datasheet

SN74ALS620A, SN74ALS621A, SN74ALS623A, SN74AS623
OCTAL BUS TRANSCEIVERS
SDAS226A – DECEMBER 1982 – REVISED JANUARY 1995
7
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
†
Supply voltage, V
CC
7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage, V
I
: All inputs 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
I/O ports 5.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range, T
A
: SN74AS623 0°C to 70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range –65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
†
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
recommended operating conditions
SN74AS623
UNIT
MIN NOM MAX
UNIT
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 64 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
SN74AS623
UNIT
PARAMETER
TEST
CONDITIONS
MIN TYP
‡
MAX
UNIT
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
= –2 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
= 4.5 V, I
OL
= 64 mA 0.35 0.55 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
70
µ
A
I
IL
Control inputs
V
CC
=55V
V
I
=04V
–0.5
mA
I
IL
A or B ports
§
V
CC
=
5
.
5
V
,
V
I
=
0
.
4
V
–0.75
mA
I
O
¶
V
CC
= 5.5 V, V
O
= 2.25 V –30 –150 mA
Outputs high 57 93
I
CC
V
CC
= 5.5 V
Outputs low 16 189
mA
Outputs disabled 71 116
‡
All typical values are at V
CC
= 5 V, T
A
= 25°C.
§
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
.