HIT HD74LVC74 Datasheet
HD74LVC74
Dual D-type Flip Flops with Preset and Clear
ADE-205-066C(Z)
Rev.3
September 1995
Description
The HD74LVC74 has independent data, preset, clear, and clock inputs Q and Q outputs in a 14 pin
package. The logic level present at the data input is transferred to the output during the positive going
transition of the clock pulse. Preset and clear are independent of the clock and accomplished by a low level
at the appropriate input. 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)
• 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)
HD74LVC74
Function Table
Inputs Outputs
PR CLR CK D Q Q
LHXXH L
HLXXL H
LL XXH *1H
HH↑HH L
HH↑LL H
HHLXQ
HHHXQ
HH↓XQ
0
0
0
H : High level
L : Low level
X : Immaterial
↓ : High to Low transition
↑ : Low to high transition
Q
: Level to Q before the indicated steady input conditions were established.
0
Note: 1. Q and Q will remain high as long as preset and clear are low, but Q and Q are unpredictable, if
preset and clear go high simultaneously.
*1
Q
0
Q
0
Q
0
Pin Arrangement
1CLR
1D
1CK
1PR
1Q
1Q
GND
1
D
2
3
CK
PR CLR
QQ
4
5
6
D
CK
CLR PR
QQ
7
14
13
12
11
10
V
CC
2CLR
2D
2CK
2PR
2Q
9
8
2Q
(Top view)
2
HD74LVC74
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 I
IK
OK
O
CC
CC
I
O
or I
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 = V
–0.5 to V
+0.5 V
CC
±50 mA
100 mA
GND
+0.5 V
CC
Item Symbol Ratings Unit Conditions
Supply voltage V
CC
1.5 to 5.5 V Data retention
2.0 to 5.5 V At operation
Input / output voltage V
I
V
O
0 to 5.5 V PR, CLR, CK, D
0 to V
CC
V Q, Q
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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