Philips pm2521 - 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
Tmirnj
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