HD74LV374A
Octal Edge-Triggered D-type Flip-Flops with 3-state Outputs
ADE-205-275 (Z)
1st Edition
April 1999
Description
The HD74LV374A has eight edge trigger D type flip flops with three state outputs in a 20 pin package.
Data at the D inputs meeting set up requirements, are transferred to the Q outputs on positive going
transitions of the clock input. When the clock input goes low, data at the D inputs will be retained at the
outputs until clock input returns high again. When a high logic level is applied to the output control input,
all outputs go to a high impedance state, regardless of what signals are present at the other inputs and the
state of the storage elements. Low-voltage and high-speed operation is suitable for the 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 ±8 mA (@V
CC
= 3.0 V to 3.6 V), ±16 mA (@V
CC
= 4.5 V to 5.5 V)
HD74LV374A
Function Table
Inputs
OE
H
L
L
L
CLK
X
↑
↑
↓
D
X
L
H
X
Output Q
Z
L
H
Q
0
Note: H: High level
L: Low level
X: Immaterial
Z: High impedance
Q
0
: Output level before the indicated steady state input conditions were established.
Pin Arrangement
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)
Rev.1, Apr. 1999, page 2 of 14
HD74LV374A
Absolute Maximum Ratings
Item
Supply voltage range
Input voltage range*
1
1, 2
Symbol
V
CC
V
I
V
O
I
IK
I
OK
I
O
I
CC
or I
GND
P
T
Ratings
–0.5 to 7.0
–0.5 to 7.0
–0.5 to V
CC
+ 0.5
–0.5 to 7.0
–20
±50
±35
±70
835
757
Unit
V
V
V
Conditions
Output voltage range*
Output: H or L
V
CC
: OFF or Output: Z
Input clamp current
Output clamp current
Continuous output current
Continuous current through
V
CC
or GND
Maximum power dissipation
3
at Ta = 25°C (in still air)*
mA
mA
mA
mA
mW
V
I
< 0
V
O
< 0 or V
O
> V
CC
V
O
= 0 to V
CC
SOP
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.
Rev.1, Apr. 1999, page 3 of 14
HD74LV374A
Recommended Operating Conditions
Item
Supply voltage range
Input voltage range
Output voltage range
Symbol
V
CC
V
I
V
O
I
OH
Min
2.0
0
0
0
Output current
—
—
—
—
I
OL
—
—
—
—
Input transition rise or fall rate
∆t
/∆v
0
0
0
Operating free-air temperature
Ta
–40
Note: Unused or floating inputs must be held high or low.
Max
5.5
5.5
V
CC
5.5
–50
–2
–8
–16
50
2
8
16
200
100
20
85
°C
ns/V
µA
mA
µA
mA
Unit
V
V
V
H or L
High impedance state
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
Logic Diagram
1
CLK
11
C1
1D
3
2
1Q
1D
To Seven Other Channels
Rev.1, Apr. 1999, page 4 of 14
HD74LV374A
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
Off-state
output current
Quiescent
supply current
Output leakage
current
Input
capacitance
I
IN
I
OZ
I
CC
I
OFF
C
IN
0 to 5.5
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
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
2.9
Max
—
—
—
—
0.5
V
CC
×
0.3
V
CC
×
0.3
V
CC
×
0.3
—
—
—
—
0.1
0.4
0.44
0.55
±1
±5
20
5
—
µA
µA
µA
µA
pF
V
I
OH
= –50
µA
I
OH
= –2 mA
I
OH
= –8 mA
I
OH
= –16 mA
I
OL
= 50
µA
I
OL
= 2 mA
I
OL
= 8 mA
I
OL
= 16 mA
V
IN
= 5.5 V or GND
V
O
= V
CC
or GND
V
IN
= V
CC
or GND, I
O
= 0
V
I
or V
O
= 0 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.
Rev.1, Apr. 1999, page 5 of 14
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