Heathkit IG-4505 - Page 51

Page 51
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INTEGRATED CIRCUITS
INTEGRATED
HEATH
MAY
BE
CIRCUITS
PART
NUMBER
REPLACED
BY
BASING
DIAGRAM
TOP
VIEW
2 2 2 7
VCC CLEAR 2D CLOCK PRESET 2Q 2Q
14 13 12 11 10 9 8
jm ~ LL T T
i r
———_—, PRESET
CLOCK Q
icl
443-6
SN7474N
ae
p
TEAR
9
CLOCK Q D Q
PRESET CLEAR
o L—"F
i 2 3 4 5 6 7
1 1D 1 l 1Q 1Q GND
CLEAR CLOCK PRESET
INPUT
A NC AD GND BC
14 13 WieWiiWioH 9H
Te TT
J AU As B J CHe Lk OW
162, 163, 1C4, 443-1 SN7490N ldcp | ace cP = CP
105,
1C6,
1C7
m
|i
K
K
2
s_P
UU Yo
tC} + $ 2
rH eHsHaWbsHoh?
BD Rog; Roiz) NC Vee Roa; Row
input ow co md)