Philips PM2521 Service Manual page 116

HEF40174B
HEX
D-TYPE FLIP-FLOP
Functional diagram
fi^ [is]
[u]
nil
fl2l
fTTl
[i^
(¥1
PINNING
VOD °5
D
Ds
D4 O4
D3 O3 CP
HEF
40174 B
Dq
to
Dg
data inputs
Do
0i
0i
D2 O2
Vss
CP
clock input
(LOW
to
HIGH
edge
triggered)
o
O
U
Tmir
nj
uj
'ii
[6]
Lijn]
1^
master
reset
input
(active
LOW)
Pinning diagram
Oq
to
Og
buffered outputs
FUNCTION TABLE
inputs
output
0
CP D
MR
/
H
H
H
J
L
H
L
1 X H
no change
X X
L L
H = HIGH
state (the
more
positive voltage)
L
=
LOW
state (the less
positive voltage)
X
=
state
is
immaterial
J
=
positive-going transition
1-
=
negative going transition