HD74LV273A
Octal D-type Flip-Flops with Clear
ADE-205-273 (Z)
1st Edition
April 1999
Description
The HD74LV273A has eight edge trigger D-type flip-flops with clear in a 20-pin package. Data on the D
input having the specified setup and hold times is transferred to the Q output on the low to high transition
of the clock input. The clear input when low, sets all outputs to a low state. Low-voltage and high-speed
operation is suitable for battery-powered products (e.g., notebook computers), and the low-power
consumption extends the battery life.
Features
V
CC
= 2.0 V to 5.5 V operation
All inputs V
IH
(Max.) = 5.5 V (@V
CC
= 0 V to 5.5 V)
All outputs V
O
(Max.) = 5.5 V (@V
CC
= 0 V)
Typical V
OL
ground bounce < 0.8 V (@V
CC
= 3.3 V, Ta = 25
C)
Typical V
OH
undershoot > 2.3 V (@V
CC
= 3.3 V, Ta = 25
C)
Output current
6 mA (@V
CC
= 3.0 V to 3.6 V),
16 mA (@V
CC
= 4.5 V to 5.5 V)
Function Table
Inputs
CLR
CLK
D
Output Q
L
X
X
L
H
H
H
H
L
L
H
X
Q
0
Note:
H: High level
L: Low level
X: Immaterial
: Low to high transition
: High to low transition
Q
0
: Output level before the indicated steady state input conditions were established.
HD74LV273A
2
Pin Arrangement
17
18
15
16
19
20
11
12
13
14
V
CC
8Q
8D
7D
7Q
6Q
1
2
3
4
5
6
7
8
9
10
CLR
1Q
1D
2D
2Q
3Q
3D
GND
4D
4Q
6D
5D
5Q
CLK
(Top view)
HD74LV273A
3
Absolute Maximum Ratings
Item
Symbol
Ratings
Unit
Conditions
Supply voltage range
V
CC
0.5 to 7.0
V
Input voltage range*
1
V
I
0.5 to 7.0
V
Output voltage range*
1, 2
V
O
0.5 to V
CC
+ 0.5
V
Output: H or L
0.5 to 7.0
V
CC
: OFF
Input clamp current
I
IK
20
mA
V
I
< 0
Output clamp current
I
OK
50
mA
V
O
< 0 or V
O
> V
CC
Continuous output current
I
O
25
mA
V
O
= 0 to V
CC
Continuous current through
V
CC
or GND
I
CC
or I
GND
50
mA
Maximum power dissipation
at Ta = 25
C (in still air)*
3
P
T
835
mW
SOP
757
TSSOP
Storage temperature
Tstg
65 to 150
C
Notes: The absolute maximum ratings are values which must not individually be exceeded, and furthermore,
no two of which may be realized at the same time.
1. The input and output voltage ratings may be exceeded if the input and output clamp-current
ratings are observed.
2. This value is limited to 5.5 V maximum.
3. The maximum package power dissipation was calculated using a junction temperature of 150
C.
HD74LV273A
4
Recommended Operating Conditions
Item
Symbol
Min
Max
Unit
Conditions
Supply voltage range
V
CC
2.0
5.5
V
Input voltage range
V
I
0
5.5
V
Output voltage range
V
O
0
V
CC
V
H or L
Output current
I
OH
--
50
A
V
CC
= 2.0 V
--
2
mA
V
CC
= 2.3 to 2.7 V
--
6
V
CC
= 3.0 to 3.6 V
--
12
V
CC
= 4.5 to 5.5 V
I
OL
--
50
A
V
CC
= 2.0 V
--
2
mA
V
CC
= 2.3 to 2.7 V
--
6
V
CC
= 3.0 to 3.6 V
--
12
V
CC
= 4.5 to 5.5 V
Input transition rise or fall rate
t /
v
0
200
ns/V
V
CC
= 2.3 to 2.7 V
0
100
V
CC
= 3.0 to 3.6 V
0
20
V
CC
= 4.5 to 5.5 V
Operating free-air temperature
Ta
40
85
C
Note:
Unused or floating inputs must be held high or low.
Logic Diagram
1Q
1Q
2
3
11
1
1D
C1
R
To Seven Other Channels
1D
CLK
CLR
HD74LV273A
5
DC Electrical Characteristics
Ta = 40 to 85
C
Item
Symbol
V
CC
(V)*
Min
Typ
Max
Unit
Test Conditions
Input voltage
V
IH
2.0
1.5
--
--
V
2.3 to 2.7
V
CC
0.7
--
--
3.0 to 3.6
V
CC
0.7
--
--
4.5 to 5.5
V
CC
0.7
--
--
V
IL
2.0
--
--
0.5
2.3 to 2.7
--
--
V
CC
0.3
3.0 to 3.6
--
--
V
CC
0.3
4.5 to 5.5
--
--
V
CC
0.3
Output voltage
V
OH
Min to
Max
V
CC
0.1
--
--
V
I
OH
= 50
A
2.3
2.0
--
--
I
OH
= 2 mA
3.0
2.48
--
--
I
OH
= 6 mA
4.5
3.8
--
--
I
OH
= 12 mA
V
OL
Min to
Max
--
--
0.1
I
OL
= 50
A
2.3
--
--
0.4
I
OL
= 2 mA
3.0
--
--
0.44
I
OL
= 6 mA
4.5
--
--
0.55
I
OL
= 12 mA
Input current
I
IN
0 to 5.5
--
--
1
A
V
I
= 5.5 V or GND
Quiescent
supply current
I
CC
5.5
--
--
20
A
V
I
= V
CC
or GND, I
O
= 0
Output leakage
current
I
OFF
0
--
--
5
A
V
I
or V
O
= 0 V to 5.5 V
Input
capacitance
C
IN
3.3
--
2
--
pF
V
I
= V
CC
or GND
Note:
For conditions shown as Min or Max, use the appropriate values under recommended operating
conditions.
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