Datasheet

SN54ALS273, SN74ALS273
OCTAL D-TYPE FLIP-FLOPS
WITH CLEAR
SDAS218A – APRIL 1982 – REVISED DECEMBER 1994
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
logic symbol
†
1D
3
1D
11
CLK
C1
R
1
1Q
2
4
2D
2Q
5
7
3D
3Q
6
8
4D
4Q
9
13
5D
5Q
12
14
6D
6Q
15
17
7D
7Q
16
18
8D
8Q
19
CLR
†
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
logic diagram (positive logic)
CLK
1D
3
1D
C1
R
1Q
2
2D
4
1D
C1
R
2Q
5
3D
7
1D
C1
R
3Q
6
4D
8
1D
C1
R
4Q
9
5D
13
1D
C1
R
5Q
12
6D
14
1D
C1
R
6Q
15
7D
17
1D
C1
R
7Q
16
8D
18
1D
C1
R
8Q
19
CLR
11
1
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
‡
Supply voltage, V
CC
7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage, V
I
7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range, T
A
: SN54ALS273 –55°C to 125°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SN74ALS273 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.