HP 8642A Operating Manual page 559

FI6-- Sk^/oi S&^Zfrl^
COUNT GATE
6B
U33B
+ 5V (F3)
R6i
Ik
+ 5V(F3)
U8A ±
u
1&
_ i i S
ID
>C1
DATA
OUT
AJJLUM
NC
TTL HISH
19GD-
24 BIT COUNT CHAIN + 5 V ( F 3 )
+5V,(F3)
U27
Ah
£
Cl
- ^ C T = 0
VCC
CTR
=L
- X C 6 9
NC'
NC'
NC'
NC'
*t>+
DIV 2
ID
St
Jli{>
+
DIV 8
10
01 0
1CT Cli
2\ U
»■ 4
U26
42.
+5VIF3)
t — X C 6 B
U23
i l 4 _ Jo.l«
_ i i
_12h
VCC
CTR
Cl
CT-0
h_
NC'
i ^
+
D I V 2
ID
NC
NC
NC
11
Si
,
E K ^
|
nTV p
1
}" "t
11.
r
^ti
11.
VCC
SRG8
G l [SHIFT)
C2 1L0AD]
1 >1
> C 3 /
■JL.CH
N C ^ i U
11
12
13
14
_c
2D
NC
U28
+ 5V (F3)
T 11
1 C 6 7
U36F U36E
> +
12
04
JUh>
VCC
CT-0 CTRDIVJ6
CT<
I