Philips Semiconductors
Product specification
Dual D-type flip-flop
DESCRIPTION
The HEF4013B is a dual D-type flip-flop which features
independent set direct (S
D
), clear direct (C
D
), clock inputs
(CP) and outputs (O, O). Data is accepted when CP is
LOW and transferred to the output on the positive-going
edge of the clock. The active HIGH asynchronous
clear-direct (C
D
) and set-direct (S
D
) are independent and
override the D or CP inputs. The outputs are buffered for
best system performance. Schmitt-trigger action in the
clock input makes the circuit highly tolerant to slower clock
rise and fall times.
FUNCTION TABLES
INPUTS
S
D
H
L
H
C
D
L
H
H
CP
X
X
X
D
X
X
X
HEF4013B
flip-flops
OUTPUTS
O
H
L
H
O
L
H
H
INPUTS
S
D
L
L
Notes
C
D
L
L
CP
D
L
H
OUTPUTS
O
n
+
1
L
H
O
n
+
1
H
L
1. H = HIGH state (the more positive voltage)
L = LOW state (the less positive voltage)
X = state is immaterial
= positive-going transition
O
n
+
1 = state after clock positive transition
PINNING
D
CP
S
D
C
D
O
O
data inputs
clock input (L to H edge-triggered)
asynchronous set-direct input (active HIGH)
asynchronous clear-direct input (active HIGH)
true output
complement output
Fig.1 Functional diagram.
HEF4013BP(N):
HEF4013BD(F):
HEF4013BT(D):
14-lead DIL; plastic
(SOT27-1)
14-lead DIL; ceramic (cerdip)
(SOT73)
14-lead SO; plastic
(SOT108-1)
( ): Package Designator North America
FAMILY DATA, I
DD
LIMITS category FLIP-FLOPS
Fig.2 Pinning diagram.
See Family Specifications
January 1995
2
PHILIPS [ NXP SEMICONDUCTORS ]
