HD74LV574A
Octal Edge-Triggered D-type Flip-Flops with 3-state Outputs
ADE-205-280 (Z)
1st Edition
April 1999
Description
The HD74LV574A has eight edge-triggered 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)
HD74LV574A
Function Table
Inputs
OE
L
L
L
H
Note: H:
L:
X:
Z:
↑:
↓:
Q
0
:
CLK
↑
↑
↓
X
D
H
L
X
X
Output Q
H
L
Q
0
Z
High level
Low level
Immaterial
High impedance
Low to high transition
High to low transition
Output level before the indicated steady state input conditions were established
Pin Arrangement
OE
1
1D 2
2D 3
3D 4
4D 5
5D 6
6D 7
7D 8
8D 9
GND 10
20 V
CC
19 1Q
18 2Q
17 3Q
16 4Q
15 5Q
14 6Q
13 7Q
12 8Q
11 CLK
(Top view)
2
HD74LV574A
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
±35
±70
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
: Z or 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
HD74LV574A
Recommended Operating Conditions
Item
Supply voltage range
Input voltage range
Output voltage range
Symbol
V
CC
V
I
V
O
Min
2.0
0
0
0
Output current
I
OH
—
—
—
—
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
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
Output: Z
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
OE
CLK
1
11
C1
1D
2
1D
19
1Q
To seven other channels
4
HD74LV574A
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
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
1.8
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
I
= 5.5 V or GND
V
O
= V
CC
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
京公网安备 11010802033920号
EEWORLD
