Philips pm2521 - Page 115

125
HEF4070B QUADRUPLE EXCLUSIVE-OR GATE
Functional
diagram
|TZ1 [T^ [T^
FI [9l
fi]
QQ
>
Ig I7 O4 O3
<6 5
D
HEF 4070 B
I2
0-|
O2
1
3
I4
Vss
UJ Lll [
3
j
[
4
j llJ Tir ill
Pinning
diagram
TRUTH
TABLE
'1
'2
°1
L L
L
H L
H
L H
H
H H
L
H
=
HIGH state (the
more
positive
voltage)
L
=
LOW
state (the less
positive voltage)
Logic
diagram
(one
gate)
HEF40106B HEX
SCHMITT
TRIGGER
Functional diagram
Logic diagram (one inverter)