HIT HD74LVC574A Datasheet
HD74LVC574A
Octal D-type Flip Flops with 3-state Outputs
ADE-205-117B(Z)
3rd Edition
December 1996
Description
The HD74LVC574A 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 at the battery drive product
(note type personal computer) and low power consumption extends the life of a battery for long time
operation.
Features
• VCC = 2.0 V to 5.5 V
• All inputs VIH (Max.) = 5.5 V (@VCC = 0 V to 5.5 V)
• All outputs V
• Typical VOL ground bounce < 0.8 V (@VCC = 3.3 V, Ta = 25°C)
• Typical VOH undershoot > 2.0 V (@VCC = 3.3 V, Ta = 25°C)
• High output current ±24 mA (@VCC = 3.0 V to 5.5 V)
(Max.) = 5.5 V (@VCC = 0 V or output off state)
OUT
HD74LVC574A
Function Table
Inputs
OC CK D Output Q
L ↑ HH
L↑LL
LLXQ
HXXZ
H : High level
L : Low level
X : Immaterial
Z : High impedance
↑ : Low to high transition
Q
: Level of Q before the indicated steady input conditions were established.
0
Pin Arrangement
0
OC
1D
2D
3D
4D
5D
6D
7D
8D
GND
10
V
1
D
2
3
4
5
6
7
8
9
Q
CK
D
Q
CK
D
Q
CK
D
Q
CK
D
Q
CK
D
Q
CK
D
Q
CK
D
Q
CK
20
19
18
17
16
15
14
13
12
11
CC
1Q
2Q
3Q
4Q
5Q
6Q
7Q
8Q
CK
(Top view)
2
HD74LVC574A
Absolute Maximum Ratings
Item Symbol Ratings Unit Conditions
Supply voltage V
Input diode current I
Input voltage V
Output diode current I
Output voltage V
Output current I
VCC, GND current / pin ICC or I
CC
IK
I
OK
O
O
GND
Storage temperature Tstg –65 to +150 °C
Note: 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.
Recommended Operating Conditions
–0.5 to 6.0 V
–50 mA VI = –0.5 V
–0.5 to 6.0 V
–50 mA VO = –0.5 V
50 mA VO = VCC+0.5 V
–0.5 to VCC +0.5 V Output "H" or "L"
–0.5 to 6.0 V Output "Z" or VCC:OFF
±50 mA
100 mA
Item Symbol Ratings Unit Conditions
Supply voltage V
CC
1.5 to 5.5 V Data hold
2.0 to 5.5 V At operation
Input / output voltage V
I
V
O
0 to 5.5 V OC, CK, D
0 to V
CC
V Output "H" or "L"
0 to 5.5 V Output "Z" or VCC:OFF
Operating temperature Ta –40 to 85 °C
Output current I
Input rise / fall time
*1
OH
I
OL
tr, t
f
–12 mA VCC = 2.7 V
2
–24*
mA VCC = 3.0 V to 5.5 V
12 mA VCC = 2.7 V
*2
24
mA VCC = 3.0 V to 5.5 V
10 ns/V
Notes: 1. This item guarantees maximum limit when one input switches.
Waveform : Refer to test circuit of switching characteristics.
2. duty cycle ≤ 50%
3
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