Ic Internal Diagrams - Radio Shack TRC-447 Service Manual

IC102
S1T3361D01
IC301
BU2630F
XIN 1
Vss 2
RPD 3
4
P-R
RON 5
F-R 6
CE 7
8
CK
IC401
µPD789166

IC INTERNAL DIAGRAMS

16 XOUT
15 V
DD
14 TPD
13 P-T
12 TON
11 F-T
10 LD
9 DA
P60/ANI0 1
P60/ANI1 2
P60/ANI2 3
P60/ANI3 4
P60/ANI4 5
P60/ANI5 6
P60/ANI6 7
P60/ANI7 8
AV 9
SS
P10 10
P11 11
Filter
Amp.
AF
Amp.
14BIT REFERENCE
COUNTER
16BIT PROGRAM
COUNTER
SHIFT REGISTER
SHIFT REGISTER
I / O
CTL
SHIFT REGISTER
SHIFT REGISTER
16BIT PROGRAM
COUNTER
14BIT REFERENCE
COUNTER
33 P01
32 P00
31 P26/TO80
30 P25/T180/SS20
29 V
DD0
28 V
SS0
27 X1
26 X2
25 RESET
24 XT1
23 XT2
— 44 —
IC104
SM8224CM
AGND DT1
1 20
TIP DT2
2 19
RING DTQ
3 18
TRQ SO
4 17
GND S1
5 16
OSCIN VDD
6 15
OSCOUT TO
7 14
MODE CR
8 13
TEST DTDET
9 12
DOUT STR
10 11
PHASE
DET
PHASE
DET