HD74LS273
Function Table
Clear
L
H
H
H
Inputs
Clock
X
↑
↑
L
D
X
H
L
X
Output
Q
L
H
L
Q
0
Notes: H; high level, L; low level, X; irrelevant
↑;
transition from low to high level
Q
0
; level of Q before the indicated steady-state input conditions were established.
Block Diagram
1D
2D
3D
4D
5D
6D
7D
8D
Clock (1)
D Q
CK
Clear
D Q
CK
Clear
D Q
CK
Clear
D Q
CK
Clear
D Q
CK
Clear
D Q
CK
Clear
D Q
CK
Clear
D Q
CK
Clear
Clear (2)
1Q
2Q
3Q
4Q
5Q
6Q
7Q
8Q
Absolute Maximum Ratings
Item
Supply voltage
Input voltage
Power dissipation
Storage temperature
Symbol
V
CC
V
IN
P
T
Tstg
Ratings
7
7
400
–65 to +150
Unit
V
V
mW
°C
Note: Voltage value, unless otherwise noted, are with respect to network ground terminal.
Recommended Operating Conditions
Item
Supply voltage
Output current
Operating temperature
Clock frequency
Clock pulse width
Clear pulse width
Data setup time
Clear (inactive-state) setup time
Data hold time
Symbol
V
CC
I
OH
I
OL
Topr
ƒ
clock
t
w (clock)
t
w (clear)
t
su (data)
t
su (clear)
t
h (data)
Min
4.75
—
—
–20
0
20
20
20↑
25↑
5↑
Typ
5.00
—
—
25
—
—
—
—
—
—
Max
5.25
–400
8
75
30
—
—
—
—
—
Unit
V
µA
mA
°C
MHz
ns
ns
ns
ns
ns
Rev.3.00, Jul.15.2005, page 2 of 6
RENESAS [ RENESAS TECHNOLOGY CORP ]
