Datasheet

SN54273, SN54LS273, SN74273, SN74LS273
OCTAL D-TYPE FLIP-FLOP WITH CLEAR
SDLS090 – OCTOBER 1976 – REVISED MARCH 1988
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
schematics of inputs and outputs
V
CC
EQUIVALENT OF EACH INPUT
INPUT
R
eq
′273
Clear: R
eq
= 3 kΩ NOM
Clock: R
eq
= 6 kΩ NOM
All other inputs: R
eq
= 8 kΩ NOM
V
CC
TYPICAL OF ALL OUTPUTS
100 Ω
NOM
OUTPUT
V
CC
EQUIVALENT OF EACH INPUT
INPUT
20 kΩ
NOM
′LS273
V
CC
TYPICAL OF ALL OUTPUTS
120 Ω NOM
OUTPUT
logic diagram (positive logic)
11
CLOCK
1
CLEAR
1D
1Q
R
C1
1D
1D
C1
R
2Q
2D
1D
C1
R
3Q
3D
1D
C1
R
4Q
4D
1D
C1
R
5Q
5D
1D
C1
R
6Q
6D
1D
C1
R
7Q
7D
1D
C1
R
8Q
8D
2
34
5
7
6
8
9
13
12
14
15
17
16
18
19
Pin numbers shown are for the DW, J, N, and W packages.