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
L
H
H
H
CLK
X
↑
↑
↓
D
X
H
L
X
Output Q
L
H
L
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
Pin Arrangement
CLR
1
1Q 2
1D 3
2D 4
2Q 5
3Q 6
3D 7
4D 8
4Q 9
GND 10
20 V
CC
19 8Q
18 8D
17 7D
16 7Q
15 6Q
14 6D
13 5D
12 5Q
11 CLK
(Top view)
2
HD74LV273A
Absolute Maximum Ratings
Item
Supply voltage range
Input voltage range*
1
Output voltage range*
1, 2
Symbol
V
CC
V
I
V
O
Ratings
–0.5 to 7.0
–0.5 to 7.0
–0.5 to V
CC
+ 0.5
–0.5 to 7.0
Input clamp current
Output clamp current
Continuous output current
Continuous current through
V
CC
or GND
Maximum power dissipation
at Ta = 25°C (in still air)*
3
I
IK
I
OK
I
O
I
CC
or I
GND
P
T
–20
±50
±25
±50
835
757
Storage temperature
Tstg
–65 to 150
°C
mA
mA
mA
mA
mW
SOP
TSSOP
Unit
V
V
V
Output: H or L
V
CC
: OFF
V
I
< 0
V
O
< 0 or V
O
> V
CC
V
O
= 0 to V
CC
Conditions
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.
3
HD74LV273A
Recommended Operating Conditions
Item
Supply voltage range
Input voltage range
Output voltage range
Output current
Symbol
V
CC
V
I
V
O
I
OH
Min
2.0
0
0
—
—
—
—
I
OL
—
—
—
—
Input transition rise or fall rate
∆t
/∆v
0
0
0
Operating free-air temperature
Ta
–40
Max
5.5
5.5
V
CC
–50
–2
–6
–12
50
2
6
12
200
100
20
85
°C
ns/V
µA
mA
Unit
V
V
V
µA
mA
H or L
V
CC
= 2.0 V
V
CC
= 2.3 to 2.7 V
V
CC
= 3.0 to 3.6 V
V
CC
= 4.5 to 5.5 V
V
CC
= 2.0 V
V
CC
= 2.3 to 2.7 V
V
CC
= 3.0 to 3.6 V
V
CC
= 4.5 to 5.5 V
V
CC
= 2.3 to 2.7 V
V
CC
= 3.0 to 3.6 V
V
CC
= 4.5 to 5.5 V
Conditions
Note: Unused or floating inputs must be held high or low.
Logic Diagram
1D
CLK
11
3
1D
1Q
C1
R
2
1Q
CLR
1
To Seven Other Channels
4
HD74LV273A
DC Electrical Characteristics
•
Ta = –40 to 85°C
Item
Input voltage
Symbol
V
IH
V
CC
(V)*
2.0
2.3 to 2.7
3.0 to 3.6
4.5 to 5.5
V
IL
2.0
2.3 to 2.7
3.0 to 3.6
4.5 to 5.5
Output voltage
V
OH
Min to
Max
2.3
3.0
4.5
V
OL
Min to
Max
2.3
3.0
4.5
Input current
Quiescent
supply current
Output leakage
current
Input
capacitance
I
IN
I
CC
I
OFF
C
IN
0 to 5.5
5.5
0
3.3
Min
1.5
V
CC
×
0.7
V
CC
×
0.7
V
CC
×
0.7
—
—
—
—
V
CC
– 0.1
2.0
2.48
3.8
—
—
—
—
—
—
—
—
Typ
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
2
Max
—
—
—
—
0.5
V
CC
×
0.3
V
CC
×
0.3
V
CC
×
0.3
—
—
—
—
0.1
0.4
0.44
0.55
±1
20
5
—
µA
µA
µA
pF
V
I
OH
= –50
µA
I
OH
= –2 mA
I
OH
= –6 mA
I
OH
= –12 mA
I
OL
= 50
µA
I
OL
= 2 mA
I
OL
= 6 mA
I
OL
= 12 mA
V
I
= 5.5 V or GND
V
I
= V
CC
or GND, I
O
= 0
V
I
or V
O
= 0 V to 5.5 V
V
I
= V
CC
or GND
Unit
V
Test Conditions
Note: For conditions shown as Min or Max, use the appropriate values under recommended operating
conditions.
5
stm32/stm8
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