HP 7901A Operating And Service Manual page 100

1820-0054
CHARACTERISTIC 2
1820-0192
VCC
1---------- 9-----1
I I
112 71
I I
I" 81
I
6
10 1
I
3
1
t----=-i
I
V
EE
I
I
I
I
L ____
L2,,-L:5 _______
.1. __ .J
CHARACTERISTIC 62
V+
CHARACTERISTIC 64
CHARACTERISTIC 72
7901-71
1820-0068
CHARACTERISTIC 2
GND
CHARACTERISTIC 48
1820-0437
CHARACTERISTIC 44
VCC
VCC
VCC
1820-0069
CHARACTERISTIC 2
1820-0233
BOUT
AIN
AOUT CLEAR
CLOCK
BORROW
DOWN
CLOCK
CARRY
UP
CoUT
LOAD
DOUT
C IN
UP/DOWN
DIN
COUNTER
CHARACTERISTIC 35
NON-
INVERTING
INPUT
INVERTING
INPUT
V-
VCC
1820-0439
1820-0077
CHARACTERISTIC 8
1820-0239
CHARACTERISTIC 49
CURRENT
LIMIT
CURRENT
SENSE
INVERTING
INPUT
FREQUENCY
COMPENSATION
NON-INVERTING
INPUT
GND
'~--------------------------------~~r----------------------------------J/
CHARACTERISTIC 60
1820-0706
1820-0537 1820-0577
ENABLE
VCC VCC A<B
A>B
BO
A~B
B1 AO
8 2 A1
B3 A2
B4 A3
5-BIT
COMPARATOR A4
CHARACTERISTIC 66 CHARACTERISTIC 67 CHARACTERISTIC 74
1820-0111
CHARACTERISTIC 29 CHARACTERISTIC 12
1820-0282
CHARACTERISTIC 63
1820-0493 1820-0510
CHARACTERISTIC 75 CHARACTERISTIC 47
1820-0722
VCC+
VCC-
GND
CHARACTERISTIC 68
VCC
1820-0305
GND
VCC
CHARACTERISTIC 13
1820-0723
CHARACTERISTIC 69
Maintenance
1820-0174
CHARACTERISTIC 1
+5V
CHARACTERISTIC 65
1826-0064
VCC+
VCC-
CHARACTERISTIC 73
Figure 5-43. Integrated Circuit Pin Layout
5-59/5-60