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8
8-4
Figure 8-1. A1 Main PCA (2620A/2625A) (cont)
s71f.eps
2620A-1001
(1 of 4)
DES
REF
POWER SUPPLY PIN NUMBERS
NOTES:
1. ALL RESISTORS ARE 1/4W 5%.
UNLESS OTHERWISE SPECIFIED
ALL CAPACITOR VALUES ARE IN MICROFARADS.
TP
VR
U
T
Z
Y
W
U31
T2
TP32
VR4
Z3
Y1
W1
TP21-29
U30
S1S
R
RT
RV
Q
P
L
C
J
CR
RT1
R64
Q9
P10
L2
J6
CR19
C59
RV1
AR3AR
LAST USED
REFERENCE DESIGNATIONS
NOT USED
P1-P9
R17-18,23-24,27,29,32-33
VDD
VDDR
-PFAIL
COM
VSS
SHLD
GND
VCC
VEE
VLOAD
FIL1
FIL2
-DIO
-WR
-RD
-RESET
E
D<7..0>
VCC
GND
TRIG
A<15..0>
TOTALIZE
DCH
DCL
SHEET 3
DCH
DCL
SHEET 2
INTERCONNECT DIAGRAM
SHEET 4
A01AR1
A01AR2
A01AR3
A01U1
A01U2
A01U3
A01U4
A01U5
A01U14
A01U13
A01U12
A01U11
A01U10
A01U9
A01U8
A01U7
A01U15
A01U16
A01U26
A01U25
A01U24
A01U23
A01U22
A01U21
A01U20
A01U17
A01U27
A01U28
A01Z2
A01U31
A01U29
14,16
8
4
4
8
26,28
20
14
16
14
28
5,36
3
-
5
4,9,10,14
14
1,16
13,14
16
20
-
-
-
-
20
16
16
14
-
5
-
7
-
2,3,4
8,15
10
2,6,9,14
7
7
-
8
7
10
7,11,12
7,11,13
4,5,6
10
-
-
-
7
7
14
2,6,45
14,22
5,8
1,2,5,7,26
5
4
11
11
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
8
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
1
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
4
-
-
-
-
-
-
-
-
-
-
-
-
8
-
-
-
-
-
-
-
8
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
DO_GNDVDDRGNDVCC VEE COM