HD74LV74A Datasheet, PDF (2/16 Pages) Hitachi Semiconductor – Dual D-type Flip Flops with Preset and Clear

HD74LV74A
Function Table
Inputs
Outputs
PRE
CLR
CLK
D
Q
Q
L
H
X
X
H
L
H
L
X
X
L
H
L
L
X
X
H*¹
H*¹
H
H
↑
H
H
L
H
H
↑
L
L
H
H
Note:
H
↓
X
Q₀
Q₀
H: High level
L: Low level
X: Immaterial
↑: Low to high transition
↓: High to low transition
Q₀:The level of Q immediately before the input conditions shown in the above table are determined.
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.
Pin Arrangement
1CLR 1
1D ²
1CLK ³
1PRE 4
1Q 5
1Q ⁶
GND 7
(Top view)
14 V_CC
13 2CLR
12 2D
11 2CLK
10 ^2PRE
9 ^2Q
8 2Q
2