HEF4027 Philips Semiconductors, HEF4027 Datasheet - Page 2

• Manufacturer Part Number: HEF4027
• Description: Dual JK flip-flop
• Manufacturer: Philips Semiconductors

Philips Semiconductors
DESCRIPTION
The HEF4027B is a dual JK flip-flop which is
edge-triggered and features independent set direct
(S
(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
(S
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.
January 1995
D
D
Dual JK flip-flop
), clear direct (C
) are independent and override the J, K, and CP inputs.
Fig.1 Functional diagram.
Fig.2 Pinning diagram.
D
), clock (CP) inputs and outputs
D
) and set-direct
2
FUNCTION TABLES
Notes
1. H = HIGH state (the more positive voltage)
PINNING
FAMILY DATA, I
See Family Specifications
J,K
CP
S
C
O
O
HEF4027BP(N):
HEF4027BD(F):
HEF4027BT(D):
( ): Package Designator North America
S
S
D
D
H
H
L
L
L
L
L
D
D
L = LOW state (the less positive voltage)
X = state is immaterial
O
n
synchronous inputs
clock input (L to H edge-triggered)
asynchronous set-direct input (active HIGH)
asynchronous clear-direct input (active HIGH)
true output
complement output
= positive-going transition
1
C
C
H
H
L
L
L
L
L
= state after clock positive transition
D
D
INPUTS
INPUTS
CP
CP
DD
X
X
X
LIMITS category FLIP-FLOPS
16-lead DIL; plastic (SOT38-1)
16-lead DIL; ceramic (cerdip) (SOT74)
16-lead SO; plastic (SOT109-1)
X
X
X
H
H
J
J
L
L
K
X
X
X
K
H
H
L
L
Product specification
O
HEF4027B
O
O
H
H
n
L
H
L
OUTPUTS
n
OUTPUTS
flip-flops
no change
1
O
O
O
n
H
H
L
H
L
n
1